Agent chat: a PDF's text goes to agents that take no documents (#2812 )

The PDF is read with lopdf (MIT, native builds only) on the worker that reads the file: the first 300 pages and 200,000 characters, with a cap on what a page's content may inflate to and a catch for a reader panic. Text-less (scanned) or unreadable PDFs are pointed to by path. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Expressions: hyperbolic functions sinh, cosh, tanh and their inverses (#9332 ) (#9334 )
2026-11-03 02:25:55 +00:00 · 2026-10-30 07:51:34 -04:00 · 2026-10-30 11:13:59 +00:00 · 2026-10-30 11:13:52 +00:00 · 2026-10-30 11:10:28 +00:00 · 2026-10-30 11:10:25 +00:00
2256 changed files with 710683 additions and 20428 deletions
@@ -1,5 +1,6 @@
 # cargo-nextest settings for CI (`cargo xtask test` does not use nextest).
-# CI builds the tests once and runs them in one job on a 32 vCPU runner (.github/workflows/ci.yml).
+# CI builds the tests once and runs them in one job on a 32 vCPU runner (.github/workflows/ci.yml),
+# except the GPU path tracer's tests (the gpu-path group below), which run in four shards of their own.

 [profile.ci]
 # Heavy tests (one to twelve minutes each on a CI runner) that pull requests skip. They run on
@@ -42,7 +43,6 @@ filter = "binary(action_matrix) & test(=action_matrix_sample)"
 threads-required = 12
 priority = 100

-
 # The slowest tests start first, so a shard does not end with one of them running alone on a
 # core while the others sit idle (seed_81 alone takes about 20 minutes under CI load). Medians
 # from the CI test timings (the junit artifacts), slowest first; a test over ~100 s belongs here.
@@ -69,3 +69,61 @@ filter = """
 ))
 """
 priority = 100
+
+# Each nextest test has its own process/device. Concurrent cold lavapipe path
+# compiles contend for CPU and can exhaust the 600 s pipeline setup budget.
+# Serialize this module per CI shard; other tests retain their normal parallelism.
+# CI runs these in their own job (GPU path tests in ci.yml), split into count partitions.
+[test-groups.gpu-path]
+max-threads = 1
+
+[[profile.ci.overrides]]
+filter = "package(=solidcraft-gpu) & test(/^path::/)"
+test-group = "gpu-path"
+
+# Full local validation opts into its own scheduling policy. Keep GitHub CI's
+# worker reservation and slow-test priorities above independent of this runner.
+[profile.local-ci]
+inherits = "ci"
+
+[[profile.local-ci.overrides]]
+filter = "binary(action_matrix) & test(=action_matrix_sample)"
+threads-required = "num-cpus"
+priority = 100
+
+[[profile.local-ci.overrides]]
+filter = "(package(solidcraft-engine) & test(=tests::robustness_goldens::seed_81)) | (package(solidcraft-kernel) & test(=tspline::tests::hostile_tsplines_never_panic))"
+priority = 99
+
+[[profile.local-ci.overrides]]
+filter = """
+(package(solidcraft-engine) & (
+    test(/^tests::robustness_goldens::seed_(81|45|20|24|95|02|57|40|18|48|32|46|85|61)$/)
+    | test(/^tests::robustness::/)
+    | test(=tests::hostile_params_never_panic)
+    | test(=cmd::clearance::tests::distances_are_exact_on_edges_and_curved_faces)
+    | test(=cmd::clipboard::tests::a_pasted_coil_joins_the_pasted_body)
+    | test(=tests::pleat_join::the_pleats_join_at_every_wall_from_2_4_to_2_6_mm)
+    | test(=tests::flush_join_loft::a_flange_flush_with_the_end_of_a_bent_tapered_tube_joins)
+    | test(=cmd::sheet::tests::perforated_sheet_takes_a_thousand_round_holes)
+    | test(=boolean_regression_tests::joined_loft_frames_plan_their_display_at_every_quality)
+))
+| (package(solidcraft-engine) & (binary(atomic_commands) | binary(step_export_regressions)))
+| (package(solidcraft-kernel) & (
+    test(=curveblend::tests::rolling_ball_turns_about_a_rounded_corner_of_its_radius)
+    | test(=tests::fillet_tabbed_plate_outer_loop_and_partial_selection_after_hole)
+    | test(=tspline::tests::hostile_tsplines_never_panic)
+    | test(=fill::tests::regular_rims_of_three_to_eight_sides_fill_with_one_face_and_close_the_cup)
+    | test(/^issue_788_tests::equal_bores_crossing_/)
+))
+"""
+priority = 98
+
+# Native Windows shader/device creation must not overlap within the local run.
+[test-groups.windows-gpu]
+max-threads = 1
+
+[[profile.local-ci.overrides]]
+platform = "cfg(windows)"
+filter = "package(solidcraft-gpu) | package(solidcraft) | (package(solidcraft-ui-egui) & test(/(offscreen|gpu)/))"
+test-group = "windows-gpu"
@@ -0,0 +1,6 @@
+# Preserve canonical source receipts and the runtime icon-discovery snapshot.
+.gitattributes text eol=lf
+/assets/icons/ui/design/requested_icons.txt text eol=lf
+# SolidCraft designs (.sc): a JSON document or a ZIP container, never Scala source, so they
+# stay out of GitHub's language statistics. Git's own text/binary detection handles both kinds.
+*.sc -linguist-detectable
@@ -6,6 +6,7 @@ body:
    attributes:
      value: |
        Thanks for taking the time to report this! Inside the app, **Report an Issue** fills most of this in for you, with the command, its settings and your environment.
+        Before reporting a boolean or modelling failure, please try to reproduce it on the latest nightly or a build from current `main`, and say which build you used.
  - type: textarea
    id: what
    attributes:
@@ -18,7 +19,8 @@ body:
    attributes:
      label: Steps to reproduce
      description: |
-        What you clicked or typed, in order. For a problem on a particular design, `solidcraft-cli script design.solidcraft --out repro.json` turns its history into a script that `solidcraft-cli eval repro.json` replays; attach it, trimmed to the failing step if you can.
+        What you clicked or typed, in order. For a problem on a particular design, `solidcraft-cli script design.sc --out repro.json` turns its history into a script that `solidcraft-cli eval repro.json` replays; attach it, trimmed to the failing step if you can.
+        Using an AI agent with SolidCraft's MCP server? The `solidcraft-reporting` skill in [`skills/`](https://github.com/tangency-labs/solidcraft/tree/main/skills) has it reproduce the problem in a fresh design and write these steps for you.
      placeholder: |
        1. Sketch a circle on the XY plane
        2. Extrude it 10 mm
@@ -2,6 +2,12 @@

 Describe the problem and resulting behavior. Link the issue when applicable.

+Changes a default: no
+
+<!-- Required line, replace "no" if this changes what a user gets out of the box (a default value, key binding, setting, tool behaviour):
+Changes a default: yes — <what>, old behaviour kept behind preference <name>
+Docs-only and bot PRs are exempt. -->
+
 ## Validation

 What did you run, and what were the results? Include expected and measured values for geometry changes.
@@ -9,9 +9,10 @@ parameter to watch the timeline rebuild. [Documentation](https://docs.solidcraft
 [ROADMAP](https://github.com/bherbruck/solidcraft/blob/main/ROADMAP.md#known-limitations) lists
 the known limitations. Designs from every earlier version open in this one.

-**Upgrading from 0.7 or earlier.** 0.8 changed the Linux app ID to `ai.storyteller.solidcraft`:
-`flatpak update` offers to replace the old app, and the `.deb`, `.rpm` and AppImage remove the old
-menu entry.
+**New app ID.** The app ID is now `io.tangencylabs.solidcraft` (it was `ai.storyteller.solidcraft`,
+and `ai.storyteller.solvecraft` up to 0.7): `flatpak update` offers to replace the old app, the
+`.deb`, `.rpm` and AppImage remove the old menu entry, and settings stay. On macOS the bundle ID
+changed too, so macOS asks once more for the permissions it had granted.

 **Upgrading from 0.5 or earlier.** 0.6 renamed SolveCraft to SolidCraft and made the zip
 container the default save format. `.solvecraft` designs, old settings folders and
@@ -42,16 +43,16 @@ installing SolidCraft; keep both remotes in the same user installation:
 ```sh
 flatpak remote-add --user --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
 flatpak remote-add --user --if-not-exists solidcraft https://docs.solidcraft.io/flatpak/solidcraft.flatpakrepo
-flatpak install --user solidcraft ai.storyteller.solidcraft
-flatpak run ai.storyteller.solidcraft
+flatpak install --user solidcraft io.tangencylabs.solidcraft
+flatpak run io.tangencylabs.solidcraft
 ```

 A remote added from the old `bherbruck.github.io` address no longer finds updates: run
 `flatpak remote-modify --user --url=https://docs.solidcraft.io/flatpak/repo/ solidcraft`, then
 `flatpak update --user`.

-Flatpak installs from 0.7 or earlier use the old ID `ai.storyteller.solvecraft`: `flatpak update --user`
-offers to replace it with `ai.storyteller.solidcraft`, and settings move along.
+Flatpak installs under an old ID (`ai.storyteller.solidcraft`, or `ai.storyteller.solvecraft` from 0.7 or
+earlier): `flatpak update --user` offers to replace it with `io.tangencylabs.solidcraft`, and settings move along.

 Single-file `.flatpak` bundles include the runtime repository address; missing runtimes
 still need an internet connection. [Linux installation details](https://docs.solidcraft.io/guide/getting-started.html#linux-flatpak).
@@ -9,12 +9,16 @@
 # Documentation, packaging, the other workflows and the GitHub bots' scripts select nothing:
 # no native job runs for them, on pull requests or on main.
 # Tests are built and run in one job on a big runner, slowest first, starting beside the repository
-# checks (no archive to upload and download). A few heavy tests (see .config/nextest.toml) are
-# skipped on pull requests and run on pushes to main and nightly. The Windows jobs (D3D12 shaders
-# and app startup), the reference tests and the doc tests run on main and nightly only, not on
-# pull requests (the fast lane, in Select checks); a break there is fixed forward on main. Only
-# main saves the build caches; pull requests restore them. sccache is on a Blacksmith sticky disk that
-# only main commits.
+# checks (no archive to upload and download). The GPU path tracer's tests run one at a time
+# (.config/nextest.toml), so they have a job of their own in four shards (GPU path tests). A few
+# heavy tests (see .config/nextest.toml) are skipped on pull requests and run on pushes to main and
+# nightly. The reference tests and the doc tests run in the merge queue, on main and nightly, not
+# on pull requests (the fast lane, in Select checks); a break there is fixed forward on main. The
+# Windows jobs (D3D12 shaders and app startup) run nightly, and in the merge queue only for a group
+# that changes what they exercise. The wasm compile check runs in the merge queue for a group that
+# touches the crates below the apps, the web app or the manifests. Dependency advisories run nightly
+# and on any pull request or merge group that changes Cargo.lock or a Cargo.toml. Only main saves the build caches; pull requests restore them.
+# sccache is on a Blacksmith sticky disk that only main commits.
 # A push to main runs only the repository checks when a passing merge-queue run tested that very
 # commit, or when nothing a build reads changed since the last push to main whose run passed.
 # Otherwise it runs everything.
@@ -30,7 +34,7 @@
 # reads `ci` from the newest run of a commit, so a run without it would block a PR that passed.
 # Cross-compilation is opt-in through Run workflow; release builds remain in release.yml.
 # Every Linux job runs on Blacksmith's Ubuntu 24.04 runners (blacksmith-<N>vcpu-ubuntu-2404), sized
-# per job: 32 vCPU for the tests, 16 for Clippy, the archive build (nightly) and the merge queue's, 8 for compiles, doc and reference tests, 4 for the light checks, 2 for Select checks and ci.
+# per job: 32 vCPU for the tests, 16 for Clippy, the GPU path tests, the archive build (nightly) and the merge queue's, 8 for compiles, doc and reference tests, 4 for the light checks, 2 for Select checks and ci.
 # The Windows shader job runs on Blacksmith's Windows Server 2025 runners (blacksmith-8vcpu-windows-2025);
 # the Windows app startup smoke stays on windows-latest, which has a desktop session that presents frames.
 # Pull requests, forks included, the merge queue, pushes to main and the nightly run all use them:
@@ -76,8 +80,13 @@ env:

 jobs:
  dependency-advisories:
+    # Nightly and by hand: advisories, bans and sources for everything. A pull request or merge
+    # group that changes Cargo.lock or a Cargo.toml (Select checks' `deps`) checks the advisories
+    # only, so a dependency with a known vulnerability is caught before it lands, not the next
+    # morning; other pull requests skip it. `ci` requires it whenever `deps` is true.
    name: Dependency advisories
-    if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
+    needs: changes
+    if: ${{ !cancelled() && (github.event_name == 'schedule' || github.event_name == 'workflow_dispatch' || needs.changes.outputs.deps == 'true') }}
    runs-on: blacksmith-4vcpu-ubuntu-2404
    timeout-minutes: 20
    steps:
@@ -86,7 +95,12 @@ jobs:
      - name: Install advisory scanner
        run: cargo install cargo-deny --version 0.20.2 --locked
      - name: Check locked dependencies
+        if: github.event_name == 'schedule' || github.event_name == 'workflow_dispatch'
        run: cargo deny --locked check --warn unmaintained advisories bans sources
+      # deny.toml denies unmaintained crates; like the nightly, they are reported, not fatal.
+      - name: Check advisories for the changed dependencies
+        if: github.event_name != 'schedule' && github.event_name != 'workflow_dispatch'
+        run: cargo deny --locked check --warn unmaintained advisories

  changes:
    name: Select checks
@@ -96,19 +110,27 @@ jobs:
    runs-on: blacksmith-2vcpu-ubuntu-2404
    permissions:
      contents: read
-      # To ask whether the merge queue already tested a commit pushed to main.
+      # To ask whether the merge queue already tested a commit pushed to main, and which labels the
+      # pull requests of a merge group carry (the render-tests opt-in).
+      pull-requests: read
      actions: read
    outputs:
      native: ${{ steps.paths.outputs.native }}
      kernel: ${{ steps.paths.outputs.kernel }}
      goldens: ${{ steps.paths.outputs.goldens }}
      windows: ${{ steps.paths.outputs.windows }}
+      # The GPU path tests run (see the rule where it is computed). The job's `if` and the `ci` job's check both read this, so they cannot disagree.
+      gpu: ${{ steps.paths.outputs.gpu }}
      full: ${{ steps.paths.outputs.full }}
      # Code changed on a pull request that has no approved-for-ci label yet: only Quick compile.
      quick: ${{ steps.paths.outputs.quick }}
      packages: ${{ steps.paths.outputs.packages }}
      oracle: ${{ steps.paths.outputs.oracle }}
      doctests: ${{ steps.paths.outputs.doctests }}
+      # Cargo.lock or a Cargo.toml changed (pull requests and merge groups): Dependency advisories.
+      deps: ${{ steps.paths.outputs.deps }}
+      # A merge group reaches the wasm build: Compile WebAssembly.
+      wasm: ${{ steps.paths.outputs.wasm }}
      # The passing run a merge of main carries forward (its URL), when this push is only that.
      carried: ${{ steps.paths.outputs.carried }}
    steps:
@@ -122,8 +144,11 @@ jobs:
          BASE_SHA: ${{ github.event.pull_request.base.sha }}
          HEAD_SHA: ${{ github.event.pull_request.head.sha }}
          PUSH_SHA: ${{ github.sha }}
+          GROUP_BASE_SHA: ${{ github.event.merge_group.base_sha }}
+          GROUP_HEAD_SHA: ${{ github.event.merge_group.head_sha }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
          HEAD_REPO: ${{ github.event.pull_request.head.repo.full_name }}
+          RENDER_LABEL: ${{ contains(github.event.pull_request.labels.*.name, 'render-tests') }}
          HEAD_REF: ${{ github.event.pull_request.head.ref }}
          REPO: ${{ github.repository }}
          APPROVED: ${{ contains(github.event.pull_request.labels.*.name, 'approved-for-ci') }}
@@ -133,6 +158,9 @@ jobs:
          kernel=false
          goldens=false
          windows=false
+          gpu_paths=false
+          deps=false
+          wasm=false
          full=true
          packages=
          # Whether the NUL-separated paths in $1 reach any code: scripts/ci/affected.py selects
@@ -144,6 +172,61 @@ jobs:
            full=$(sed -n 's/^full=//p' "$RUNNER_TEMP/ci-affected")
            packages=$(sed -n 's/^packages=//p' "$RUNNER_TEMP/ci-affected")
          }
+          # Whether the NUL-separated paths in $1 (the diff $2) reach what the Windows D3D12 jobs
+          # exercise: the GPU crate and its shaders, the app and its startup, the viewport's wgpu
+          # glue, the vendored egui-wgpu, their scripts, or a lockfile change that moves the
+          # graphics stack (wgpu, naga, egui, winit, windows). Pull requests and merge groups share it.
+          windows_paths() {
+            while IFS= read -r -d '' path; do
+              case "$path" in
+                crates/gpu/*|apps/solidcraft/*|crates/ui-egui/src/gpu.rs|vendor/egui-wgpu/*) windows=true ;;
+                tools/windows-*.ps1|.github/workflows/ci.yml|rust-toolchain*|.cargo/*) windows=true ;;
+              esac
+            done < "$1"
+            if [ "$windows" = false ] && grep -qxz 'Cargo.lock' "$1" \
+              && git diff "$2" -- Cargo.lock \
+                | grep -Eq '^[ +-]name = "(wgpu[a-z_-]*|naga|egui[a-z_-]*|eframe|winit|windows[a-z_-]*|d3d12)"'; then
+              windows=true
+            fi
+          }
+          # Whether the NUL-separated paths in $1 are render code: the render crate, the path
+          # tracer and its shaders in the GPU crate, the render workspace UI, the render assets.
+          # Core, kernel and CI changes do not trigger the path tests (about 56 runner-minutes):
+          # the tracer reads the scene through interfaces the other tests cover, and the nightly
+          # runs them for everything.
+          gpu_paths() {
+            while IFS= read -r -d '' path; do
+              case "$path" in
+                crates/render/*|crates/gpu/src/path/*|crates/ui-egui/src/render_workspace*|assets/render/*) gpu_paths=true ;;
+              esac
+            done < "$1"
+          }
+          # Whether the NUL-separated paths in $1 change the dependencies (Cargo.lock or any
+          # Cargo.toml: deps), and whether they reach what `cargo xtask wasm` compiles (wasm): the
+          # crates below the apps, the web app, the vendored crates, the manifests and lockfile, the
+          # toolchain and cargo config, and this workflow. #8227 put a native-only call in
+          # crates/ui-egui and the merge queue passed it, because nothing built for wasm there.
+          deps_wasm_paths() {
+            while IFS= read -r -d '' path; do
+              case "$path" in
+                Cargo.lock|Cargo.toml|*/Cargo.toml) deps=true ;;
+              esac
+              case "$path" in
+                crates/*|apps/solidcraft-web/*|vendor/*|Cargo.lock|Cargo.toml|rust-toolchain*|.cargo/*|.github/workflows/ci.yml) wasm=true ;;
+              esac
+            done < "$1"
+          }
+          # Opt-in for a big render change: a pull request labelled render-tests, or a merge group
+          # holding one (its pull requests are the (#N) of its squash commits), runs them whatever
+          # the paths say.
+          group_has_render_label() {
+            for pr in $(git log --format=%s "$1" | grep -o '(#[0-9]*)$' | tr -d '(#)'); do
+              if gh api "repos/$REPO/issues/$pr" --jq '.labels[].name' | grep -qx render-tests; then
+                return 0
+              fi
+            done
+            return 1
+          }
          if [ "$EVENT_NAME" = push ]; then
            # The queue lands the very commit its merge_group run tested. If that run passed,
            # testing the push again proves nothing new; otherwise (a merge that skipped the
@@ -164,15 +247,36 @@ jobs:
              # push before may never have run: a newer push cancels a waiting one).
              echo "$tested..$PUSH_SHA changes no code: repository checks only."
            else
-              # Code changed (or the push can't be compared): main runs everything.
+              # Code changed (or the push can't be compared): main runs everything but Windows.
+              # The merge queue ran Windows for the changes that reach it, and the nightly runs it
+              # for everything else (it passed 129 of 129 non-PR runs before this).
              full=true
              packages=
              native=true
-              windows=true
            fi
+          elif [ "$EVENT_NAME" = merge_group ]; then
+            native=true
+            # Windows (about 16 runner-minutes) only for a group that changes what it exercises;
+            # the nightly runs it whatever changed. A group that can't be compared runs it.
+            if git diff --no-renames --name-only -z "$GROUP_BASE_SHA...$GROUP_HEAD_SHA" > "$RUNNER_TEMP/ci-paths"; then
+              windows_paths "$RUNNER_TEMP/ci-paths" "$GROUP_BASE_SHA...$GROUP_HEAD_SHA"
+              gpu_paths "$RUNNER_TEMP/ci-paths"
+              deps_wasm_paths "$RUNNER_TEMP/ci-paths"
+              if [ "$gpu_paths" = false ] && group_has_render_label "$GROUP_BASE_SHA..$GROUP_HEAD_SHA"; then
+                gpu_paths=true
+              fi
+            else
+              windows=true
+              gpu_paths=true
+              deps=true
+              wasm=true
+            fi
+            echo "windows=$windows gpu_paths=$gpu_paths deps=$deps wasm=$wasm for $GROUP_BASE_SHA...$GROUP_HEAD_SHA"
          elif [ "$EVENT_NAME" != pull_request ]; then
+            # The nightly run and Run workflow: everything, Windows included.
            native=true
            windows=true
+            gpu_paths=true
          else
            # Compare both old and new paths of renames; unknown paths run native checks.
            git diff --no-renames --name-only -z "$BASE_SHA...$HEAD_SHA" > "$RUNNER_TEMP/ci-paths"
@@ -185,19 +289,13 @@ jobs:
              case "$path" in
                crates/kernel/*|vendor/truck-*|tests/robustness/*) goldens=true ;;
              esac
-              # What the Windows D3D12 jobs exercise: the GPU crate and its shaders, the app and
-              # its startup, the viewport's wgpu glue, the vendored egui-wgpu, their scripts.
-              case "$path" in
-                crates/gpu/*|apps/solidcraft/*|crates/ui-egui/src/gpu.rs|vendor/egui-wgpu/*) windows=true ;;
-                tools/windows-*.ps1|.github/workflows/ci.yml|rust-toolchain*|.cargo/*) windows=true ;;
-              esac
            done < "$RUNNER_TEMP/ci-paths"
-            # A lockfile change that moves the graphics stack (wgpu, naga, egui, winit, windows).
-            if [ "$windows" = false ] && grep -qxz 'Cargo.lock' "$RUNNER_TEMP/ci-paths" \
-              && git diff "$BASE_SHA...$HEAD_SHA" -- Cargo.lock \
-                | grep -Eq '^[ +-]name = "(wgpu[a-z_-]*|naga|egui[a-z_-]*|eframe|winit|windows[a-z_-]*|d3d12)"'; then
-              windows=true
-            fi
+            # Computed as for a merge group, then turned off below (the fast lane).
+            windows_paths "$RUNNER_TEMP/ci-paths" "$BASE_SHA...$HEAD_SHA"
+            # The advisories run on the pull request itself (it builds nothing of ours: about two minutes, most of it installing cargo-deny);
+            # the wasm compile waits for the merge queue.
+            deps_wasm_paths "$RUNNER_TEMP/ci-paths"
+            wasm=false
            # Pull requests build and test the touched packages and their dependents; nothing
            # selected means no code changed.
            select_packages "$RUNNER_TEMP/ci-paths"
@@ -242,13 +340,35 @@ jobs:
              goldens=false
            fi
          fi
+          # The GPU path tests (their own job, about 56 runner-minutes) are for render changes only:
+          # - on a pull request, when it carries the render-tests label (opt-in for a big render
+          #   change) or touches render code (gpu_paths); no other pull request runs them;
+          # - in the merge queue, when the group's diff touches render code or one of its pull
+          #   requests carries render-tests;
+          # - in the nightly and by hand, always, so anything the above skipped is caught within a day;
+          # - not on a push to main: the queue tested that commit, or the nightly will.
+          gpu=false
+          if [ "$native" = true ]; then
+            case "$EVENT_NAME" in
+              pull_request)
+                gpu_paths "$RUNNER_TEMP/ci-paths"
+                gpu=$gpu_paths
+                if [ "$RENDER_LABEL" = true ]; then gpu=true; fi ;;
+              merge_group) gpu=$gpu_paths ;;
+              push) gpu=false ;;
+              *) gpu=true ;;
+            esac
+          fi
          {
            echo "native=$native"
+            echo "gpu=$gpu"
            echo "kernel=$kernel"
            echo "goldens=$goldens"
            echo "windows=$windows"
            echo "oracle=$oracle"
            echo "doctests=$doctests"
+            echo "deps=$deps"
+            echo "wasm=$wasm"
            echo "carried=$carried"
            echo "full=$full"
            echo "quick=$quick"
@@ -280,8 +400,19 @@ jobs:
        run: cargo xtask licences --check
      - name: Dependency layers
        run: cargo xtask layers
+      - name: Universal UI containers
+        run: |
+          cargo xtask ui-containers
+          cargo test -p xtask ui_containers --locked
      - name: Sorted lists
        run: cargo xtask lists
+      # New UI text must reach every complete catalog; report it here, before review (#8542).
+      - name: Translations in the complete catalogs
+        run: cargo xtask i18n --check
+      - name: Agent router and skills cite real files
+        run: |
+          cargo xtask skills
+          cargo test -p xtask skills --locked
      - name: Design format pending changes
        run: bash scripts/test-format-pending.sh
      - name: Web app offline use and updates (headless Chrome)
@@ -290,8 +421,8 @@ jobs:
        run: python3 -I scripts/ci/test_affected.py
      - name: Merge-of-main detection self-test
        run: python3 -I scripts/ci/test_main_merge.py
-      - name: Claim and triage bot tests
-        run: node --test scripts/claim/*.test.js scripts/triage/*.test.js
+      - name: Claim, triage and kernel-paused bot tests
+        run: node --test scripts/claim/*.test.js scripts/triage/*.test.js scripts/kernel-paused/*.test.js scripts/pr-checks/*.test.js

  # Fast feedback for a pull request that has not been approved for the full CI yet.
  quick-compile:
@@ -483,8 +614,10 @@ jobs:
          scope=(--workspace)
          if [ "$FULL" != true ]; then scope=(); for p in $PACKAGES; do scope+=(-p "$p"); done; fi
          status=0
+          # The GPU path tracer's tests run in their own job (GPU path tests): one at a time, they
+          # took about 36 of this job's 45 minutes.
          cargo nextest run "${scope[@]}" --cargo-profile ci --locked --profile ci --no-tests=pass \
-            --ignore-default-filter -E "$base" || status=1
+            --ignore-default-filter -E "($base) & not (package(=solidcraft-gpu) & test(/^path::/))" || status=1
          if [ "$status" != 0 ]; then
            # A failed golden gets the hint to re-record it (junit.xml lists the failures).
            if [ -f "$junit" ] && tr '\n' ' ' < "$junit" | grep -q '<testcase name="tests::robustness_goldens::[^"]*"[^>]*>[[:space:]]*<failure'; then
@@ -504,6 +637,96 @@ jobs:
          path: ${{ env.CARGO_TARGET_DIR || 'target' }}/nextest/ci/junit.xml
          retention-days: 7

+  gpu-path-tests:
+    name: GPU path tests (${{ matrix.shard }}/4)
+    # The GPU path tracer's tests (about 108) compile their pipelines on lavapipe, one test at a
+    # time (the gpu-path test group in .config/nextest.toml keeps them within the 600 s pipeline
+    # setup budget). Serial, they took about 36 minutes, the longest chain in Native Linux tests;
+    # here four shards run beside it. Their filter is the one Native Linux tests leaves out, so
+    # every test runs exactly once.
+    # 16 vCPU, not 8: lavapipe compiles on every core, and on 8 vCPU one test went past the 600 s
+    # budget (665 s, against 204 s for the same test in another run) and a shard took 35 minutes.
+    needs: changes
+    if: ${{ !cancelled() && needs.changes.result == 'success' && needs.changes.outputs.gpu == 'true' }}
+    runs-on: blacksmith-16vcpu-ubuntu-2404
+    timeout-minutes: 45
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [1, 2, 3, 4]
+    env:
+      # As in Native Linux tests: lavapipe draws, and a test without an adapter fails.
+      SOLIDCRAFT_GPU: software
+      SOLIDCRAFT_REQUIRE_GPU: "1"
+      # lavapipe's own shader cache (below).
+      MESA_SHADER_CACHE_DIR: /home/runner/.cache/mesa-gpu
+      CARGO_INCREMENTAL: "0"
+      RUSTC_WRAPPER: sccache
+      SCCACHE_DIR: /home/runner/.cache/sccache
+      SCCACHE_CACHE_SIZE: 20G
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - name: Install a software Vulkan driver (lavapipe)
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends mesa-vulkan-drivers libvulkan1
+      - name: Size parallel compiles to the job's memory
+        run: scripts/ci/build-jobs.sh
+      - uses: dtolnay/rust-toolchain@stable
+      # sccache lives on a Blacksmith sticky disk (an ext4 volume cloned from the last snapshot,
+      # no 10 GB limit and no download). Only main commits it; pull requests, the merge queue and
+      # forks mount a clone and never write back, so nothing they build can reach main's cache.
+      # The shards build the same thing, so only the first one commits it (and saves the cache).
+      - name: Mount the compiler cache
+        uses: useblacksmith/stickydisk@3f6be1451e3cad893b778bc93495c80452a5da26 # v1.7.2
+        continue-on-error: true
+        with:
+          key: ${{ github.repository }}-sccache-gpu
+          path: /home/runner/.cache/sccache
+          commit: ${{ github.ref == 'refs/heads/main' && matrix.shard == 1 && 'on-change' || 'false' }}
+      # The first test in a shard to build the path pipeline compiles it cold on lavapipe (335 to
+      # 665 s, against the 600 s setup budget); every later one reads Mesa's disk cache (about
+      # 30 s). Keeping that cache from main's last run lets the first test read it too, until the
+      # shaders change. Same sticky disk rules as the compiler cache.
+      - name: Mount lavapipe's shader cache
+        uses: useblacksmith/stickydisk@3f6be1451e3cad893b778bc93495c80452a5da26 # v1.7.2
+        continue-on-error: true
+        with:
+          key: ${{ github.repository }}-mesa-gpu
+          path: /home/runner/.cache/mesa-gpu
+          commit: ${{ github.ref == 'refs/heads/main' && matrix.shard == 1 && 'on-change' || 'false' }}
+      # Main saves the cache; every other run restores it, read-only.
+      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
+        with:
+          key: native-gpu
+          save-if: ${{ github.ref == 'refs/heads/main' && matrix.shard == 1 }}
+      - name: Set up compiler cache
+        uses: mozilla-actions/sccache-action@fc920bf0ec8de6ee65d409111f7ec508035751ba # v0.0.11
+        with:
+          version: v0.16.0
+      - uses: taiki-e/install-action@1168f6810a3cb30a3514bf5756a3b7f0422c6df8 # v2.87.28
+        with:
+          tool: cargo-nextest
+      - name: Run one shard of the GPU path tests
+        env:
+          SHARD: ${{ matrix.shard }}
+        run: |
+          # None of these is in the default filter (the heavy tests), so pull requests, the merge
+          # queue, main and nightly all run every one of them, as before. `count` deals the tests
+          # out in turn (27 each); `hash` split them 41/40/27 across three shards.
+          cargo nextest run -p solidcraft-gpu --cargo-profile ci --locked --profile ci --no-tests=pass \
+            --ignore-default-filter -E 'test(/^path::/)' --partition "count:$SHARD/4"
+      - name: Compiler cache statistics
+        if: always()
+        run: sccache --show-stats
+      - name: Upload test timings
+        if: always()
+        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        with:
+          name: junit-gpu-${{ matrix.shard }}
+          path: ${{ env.CARGO_TARGET_DIR || 'target' }}/nextest/ci/junit.xml
+          retention-days: 7
+
  action-matrix:
    # Every ordinary action on every face, edge, vertex and body of the design corpus, against
    # tests/action_matrix/baseline.json (docs/action-matrix.md). Every test run checks a sample;
@@ -765,7 +988,7 @@ jobs:
    # commit's real run instead: the merge queue reads `ci` from the newest run of a commit, so a
    # run without a passing `ci` would block a pull request that passed (#1850, #3182, #3252).
    name: ci
-    needs: [changes, checks, quick-compile, clippy, build-tests, tests, doc-tests, oracle, windows-fxc, windows-startup]
+    needs: [changes, checks, quick-compile, clippy, build-tests, tests, gpu-path-tests, doc-tests, oracle, windows-fxc, windows-startup, dependency-advisories, wasm]
    if: always() && (github.event_name != 'pull_request' || !github.event.pull_request.draft)
    runs-on: blacksmith-2vcpu-ubuntu-2404
    permissions:
@@ -813,10 +1036,16 @@ jobs:
          BUILD: ${{ needs.build-tests.result }}
          EVENT_NAME: ${{ github.event_name }}
          TESTS: ${{ needs.tests.result }}
+          GPU_RUN: ${{ needs.changes.outputs.gpu }}
+          GPU: ${{ needs.gpu-path-tests.result }}
          DOCS: ${{ needs.doc-tests.result }}
          ORACLE: ${{ needs.oracle.result }}
          WINDOWS_FXC: ${{ needs.windows-fxc.result }}
          WINDOWS_STARTUP: ${{ needs.windows-startup.result }}
+          DEPS_RUN: ${{ needs.changes.outputs.deps }}
+          ADVISORIES: ${{ needs.dependency-advisories.result }}
+          WASM_RUN: ${{ needs.changes.outputs.wasm }}
+          WASM: ${{ needs.wasm.result }}
        run: |
          test "$CHANGES" = success
          test "$CHECKS" = success
@@ -832,6 +1061,10 @@ jobs:
            fi
            test "$TESTS" = success
          fi
+          # The same output decides whether the GPU path tests run (their job's `if`).
+          if [ "$GPU_RUN" = true ]; then
+            test "$GPU" = success
+          fi
          if [ "$DOCTESTS" = true ]; then
            test "$DOCS" = success
          fi
@@ -842,6 +1075,14 @@ jobs:
            test "$WINDOWS_FXC" = success
            test "$WINDOWS_STARTUP" = success
          fi
+          # Cargo.lock or a Cargo.toml changed on a pull request or in a merge group.
+          if [ "$DEPS_RUN" = true ]; then
+            test "$ADVISORIES" = success
+          fi
+          # A merge group that reaches the wasm build.
+          if [ "$WASM_RUN" = true ]; then
+            test "$WASM" = success
+          fi
      - name: Note a carried result
        if: needs.changes.outputs.carried != ''
        env:
@@ -849,9 +1090,13 @@ jobs:
        run: |
          echo "This push only merges main into a change that already passed; the heavy checks were not repeated. Passing run: $CARRIED" >> "$GITHUB_STEP_SUMMARY"

+  # Every crate below the apps and the web app must build for the browser (`cargo xtask wasm`, a
+  # cargo check, no tests). In the merge queue for a group that reaches the wasm build (Select
+  # checks' `wasm`), where `ci` requires it; by hand with cross_compile.
  wasm:
-    name: Compile WebAssembly (manual)
-    if: github.event_name == 'workflow_dispatch' && inputs.cross_compile
+    name: Compile WebAssembly
+    needs: changes
+    if: ${{ !cancelled() && ((github.event_name == 'workflow_dispatch' && inputs.cross_compile) || needs.changes.outputs.wasm == 'true') }}
    runs-on: blacksmith-8vcpu-ubuntu-2404
    timeout-minutes: 30
    steps:
@@ -912,3 +1157,49 @@ jobs:
          . "$HOME/.cargo/env"
          export CRAFT_FONTS_DIR="$PWD/craft-fonts"
          cargo check --all-targets --locked --target riscv64gc-unknown-linux-gnu
+
+  # Nobody watches the nightly run, and it failed every day from 2026-10-16 to 2026-10-28 before
+  # anyone noticed. When a nightly fails, open one issue, "Nightly CI is failing" (label `ci`), or
+  # comment on it if it is already open; when a nightly passes, close it. A nightly that neither
+  # failed nor fully passed (cancelled) leaves the issue as it is. The only job that may write issues.
+  nightly-alert:
+    name: Nightly alert
+    needs: [dependency-advisories, changes, checks, ci, build-tests, action-matrix, action-matrix-determinism, property-tests]
+    if: always() && github.event_name == 'schedule'
+    runs-on: blacksmith-2vcpu-ubuntu-2404
+    timeout-minutes: 5
+    permissions:
+      issues: write
+    steps:
+      - name: Open, update or close the nightly issue
+        env:
+          GH_TOKEN: ${{ github.token }}
+          GH_REPO: ${{ github.repository }}
+          RESULTS: ${{ toJSON(needs) }}
+          RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
+          SHA: ${{ github.sha }}
+        run: |
+          title="Nightly CI is failing"
+          failed=$(jq -r 'to_entries[] | select(.value.result == "failure") | .key' <<<"$RESULTS")
+          unfinished=$(jq -r 'to_entries[] | select(.value.result != "success" and .value.result != "failure") | "\(.key) (\(.value.result))"' <<<"$RESULTS")
+          issue=$(gh issue list --state open --label ci --limit 100 --json number,title \
+            --jq "[.[] | select(.title == \"$title\")] | first | .number // empty")
+          if [ -n "$failed" ]; then
+            body="The nightly run on ${SHA:0:9} failed: $RUN_URL
+
+          Failed jobs: $(paste -sd , - <<<"$failed" | sed 's/,/, /g')."
+            if [ -n "$issue" ]; then
+              gh issue comment "$issue" --body "$body"
+            else
+              gh issue create --title "$title" --label ci --body "$body
+
+          This issue is opened and updated by the nightly run (the nightly-alert job in .github/workflows/ci.yml) and closed by the first nightly that passes."
+            fi
+          elif [ -z "$unfinished" ]; then
+            if [ -n "$issue" ]; then
+              gh issue close "$issue" --comment "The nightly run on ${SHA:0:9} passed: $RUN_URL"
+            fi
+            echo "The nightly passed."
+          else
+            echo "Nothing failed, but not every job finished: $unfinished. The issue is left as it is."
+          fi
@@ -0,0 +1,42 @@
+# Nightly import checks on real-world STEP files (#1397): the external corpus in
+# tests/external-corpus.toml is downloaded (hash-verified), imported headless, and checked
+# against tolerance-based expectations — body counts, total volume and area, time and memory
+# budgets. It is not part of `cargo xtask ci`: it downloads from the internet.
+#
+# Import results should improve over time (healing, edge merging, meshing). When a check fails
+# because the numbers moved for the better (or the source changed upstream), re-record with
+# `cargo xtask external-corpus --bless "why"` in a pull request, never by editing numbers.
+name: External corpus
+
+on:
+  schedule:
+    - cron: '40 3 * * *'
+  workflow_dispatch:
+    inputs:
+      only:
+        description: "Run only this corpus entry name (empty = every entry)"
+        type: string
+        default: ""
+
+permissions:
+  contents: read
+
+jobs:
+  corpus:
+    name: Import the external STEP corpus
+    runs-on: ubuntu-24.04
+    timeout-minutes: 120
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Build the CLI
+        run: cargo build --profile ci -p solidcraft-cli
+      - name: Import and check every entry
+        env:
+          ONLY: ${{ inputs.only }}
+        run: |
+          if [ -z "$ONLY" ]; then
+            cargo run -q -p xtask -- external-corpus --cli target/ci/solidcraft-cli
+          else
+            cargo run -q -p xtask -- external-corpus --cli target/ci/solidcraft-cli --only "$ONLY"
+          fi
@@ -1,6 +1,8 @@
 # Files generated from the code are rewritten here, on main, after each merge, so pull requests
 # never edit them (two pull requests that each regenerated one would always conflict):
 # THIRD-PARTY-LICENSES.txt (`cargo xtask licences`) and docs/features.md (`cargo xtask features`).
+# Pending files (assets/locales/pending, attribution/pending) are folded into the catalogs and
+# ATTRIBUTION.md by `cargo xtask fold-pending`.
 name: Generated files

 on:
@@ -17,6 +19,8 @@ on:
      - "crates/engine/**"
      - "apps/solidcraft-cli/**"
      - "xtask/**"
+      - "assets/locales/pending/*.json"
+      - "attribution/pending/*.md"
      - ".github/workflows/generated.yml"
  workflow_dispatch:

@@ -48,13 +52,15 @@ jobs:
        run: cargo xtask licences
      - name: docs/features.md
        run: cargo xtask features
+      - name: Pending locale strings and attribution rows
+        run: cargo xtask fold-pending
      - name: Commit if changed
        run: |
-          if git diff --quiet -- THIRD-PARTY-LICENSES.txt docs/features.md; then echo "unchanged"; exit 0; fi
+          if [ -z "$(git status --porcelain)" ]; then echo "unchanged"; exit 0; fi
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git add THIRD-PARTY-LICENSES.txt docs/features.md
-          git commit -m "Regenerate THIRD-PARTY-LICENSES.txt and docs/features.md [skip ci]"
+          git add -A THIRD-PARTY-LICENSES.txt docs/features.md assets/locales ATTRIBUTION.md attribution
+          git commit -m "Regenerate generated files and fold pending files [skip ci]"
          for _ in 1 2 3; do
            git pull --rebase origin main && git push origin HEAD:main && exit 0
            sleep 10
@@ -0,0 +1,42 @@
+# While a new geometry kernel is evaluated, new issues, pull requests and discussions about kernel
+# work are labelled `kernel-paused` for a maintainer to answer (CONTRIBUTING.md, "Kernel work is
+# paused"). The logic is in scripts/kernel-paused/ (tested in ci.yml).
+name: Kernel paused
+
+on:
+  issues:
+    types: [opened]
+  # pull_request_target so PRs from forks can be labelled. It runs the base branch's
+  # scripts/kernel-paused and only lists the PR's changed paths; the PR's code is never checked out.
+  pull_request_target:
+    types: [opened]
+  discussion:
+    types: [created]
+
+permissions:
+  contents: read # to check out scripts/kernel-paused
+  issues: write
+  pull-requests: write # to list a PR's changed paths and add its label
+  discussions: write
+
+concurrency:
+  group: kernel-paused-${{ github.event.issue.number || github.event.pull_request.number || github.event.discussion.number }}
+  cancel-in-progress: false
+
+jobs:
+  paused:
+    name: Kernel paused bot
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          sparse-checkout: scripts/kernel-paused
+      - uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          script: |
+            const paused = require('./scripts/kernel-paused/kernel-paused.js');
+            const done = context.eventName === 'discussion'
+              ? await paused.handleDiscussion({ github, context })
+              : await paused.handleOpened({ github, context });
+            core.info(done);
@@ -39,6 +39,8 @@ jobs:
        run: python3 packaging/tests/nightly_test.py
      - name: Windows executable icon validation regression
        run: python3 packaging/tests/windows_icon_test.py
+      - name: AppImage CLI wrapper regression
+        run: python3 packaging/tests/apprun_test.py
      - name: Flatpak desktop smoke validation regression
        run: python3 packaging/tests/flatpak_test.py
      - name: PowerShell
@@ -53,13 +55,15 @@ jobs:
      - name: XML, desktop entry, AppStream, Flatpak manifest
        run: |
          xmllint --noout assets/platforms/windows/solidcraft.wxs assets/platforms/windows/solidcraft.en-us.wxl assets/platforms/macos/*.plist* assets/platforms/linux/*.xml*
-          desktop-file-validate assets/platforms/linux/ai.storyteller.solidcraft.desktop
-          # The window's X11 class is its app id; the old id stays only as the rename shims.
-          grep -qx 'StartupWMClass=ai.storyteller.solidcraft' assets/platforms/linux/ai.storyteller.solidcraft.desktop
-          grep -q '<id>ai.storyteller.solvecraft</id>' assets/platforms/linux/ai.storyteller.solidcraft.metainfo.xml.in
+          desktop-file-validate assets/platforms/linux/io.tangencylabs.solidcraft.desktop
+          # The window's X11 class is its app id; the old ids stay only as the rename shims.
+          grep -qx 'StartupWMClass=io.tangencylabs.solidcraft' assets/platforms/linux/io.tangencylabs.solidcraft.desktop
+          grep -q '<id>ai.storyteller.solidcraft</id>' assets/platforms/linux/io.tangencylabs.solidcraft.metainfo.xml.in
+          grep -q '<id>ai.storyteller.solvecraft</id>' assets/platforms/linux/io.tangencylabs.solidcraft.metainfo.xml.in
+          grep -qx 'X-Flatpak-RenamedFrom=ai.storyteller.solidcraft.desktop;ai.storyteller.solvecraft.desktop;' assets/platforms/linux/io.tangencylabs.solidcraft.desktop
          grep -qF -e '--end-of-life-rebase=' packaging/flatpak-site.sh
-          sed -e 's/@VERSION@/0.0.0/' -e 's/@DATE@/2026-01-01/' assets/platforms/linux/ai.storyteller.solidcraft.metainfo.xml.in >"$RUNNER_TEMP/ai.storyteller.solidcraft.metainfo.xml"
-          appstreamcli validate --no-net --explain "$RUNNER_TEMP/ai.storyteller.solidcraft.metainfo.xml"
-          python3 -c "import yaml; m = yaml.safe_load(open('packaging/linux/flatpak/ai.storyteller.solidcraft.bundle.yml')); assert m['id'] == 'ai.storyteller.solidcraft' and m['command'] == 'solidcraft'"
+          sed -e 's/@VERSION@/0.0.0/' -e 's/@DATE@/2026-01-01/' assets/platforms/linux/io.tangencylabs.solidcraft.metainfo.xml.in >"$RUNNER_TEMP/io.tangencylabs.solidcraft.metainfo.xml"
+          appstreamcli validate --no-net --explain "$RUNNER_TEMP/io.tangencylabs.solidcraft.metainfo.xml"
+          python3 -c "import yaml; m = yaml.safe_load(open('packaging/linux/flatpak/io.tangencylabs.solidcraft.bundle.yml')); assert m['id'] == 'io.tangencylabs.solidcraft' and m['command'] == 'solidcraft'"
          python3 -c "import yaml; m = yaml.safe_load(open('packaging/linux/snap/snapcraft.yaml')); assert m['name'] == 'solidcraft' and m['confinement'] == 'strict' and m['apps']['solidcraft']['command'] == 'usr/bin/solidcraft'"
          python3 -m py_compile packaging/linux/snap-smoke.py
@@ -65,6 +65,7 @@ jobs:
        run: |
          mkdir -p site
          cp -r target/book/. site/
+          bash docs/book/seo.sh site  # canonical links, robots.txt, sitemap.xml
          cp -r dist/web site/app
      - uses: actions/configure-pages@v5
        id: pages
@@ -0,0 +1,70 @@
+# Two quick checks on every pull request (CONTRIBUTING.md, "Sending a change"): no second open PR
+# for an issue a lower-numbered one already closes, and the "Changes a default:" line is filled in.
+# Neither is a required status check. The logic is in scripts/pr-checks/pr-checks.js (tested in ci.yml).
+name: PR checks
+
+on:
+  # pull_request, never pull_request_target: nothing here checks out or runs the PR's code, and the
+  # token is read-only for fork PRs. Only scripts/pr-checks from the PR's own merge commit is run.
+  pull_request:
+    types: [opened, edited, synchronize, reopened, ready_for_review, labeled, unlabeled]
+
+permissions:
+  contents: read
+  pull-requests: read
+
+concurrency:
+  group: pr-checks-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
+
+jobs:
+  duplicate:
+    name: Duplicate PR check
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          sparse-checkout: scripts/pr-checks
+      - uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          script: |
+            const checks = require('./scripts/pr-checks/pr-checks.js');
+            const r = await checks.checkDuplicate({ github, context, core });
+            core.info(JSON.stringify(r));
+
+  defaults:
+    name: Defaults line check
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          sparse-checkout: scripts/pr-checks
+      - uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          script: |
+            const checks = require('./scripts/pr-checks/pr-checks.js');
+            const r = await checks.checkDefaults({ github, context, core });
+            core.info(JSON.stringify(r));
+
+  # Labelling needs write access, which a fork PR's token never has, so it is its own job and best
+  # effort: a fork PR just doesn't get the `changes-default` label from here.
+  label:
+    name: Label changes-default
+    if: github.event.pull_request.head.repo.full_name == github.repository
+    runs-on: ubuntu-24.04
+    timeout-minutes: 5
+    continue-on-error: true
+    permissions:
+      contents: read
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          sparse-checkout: scripts/pr-checks
+      - uses: actions/github-script@3a2844b7e9c422d3c10d287c895573f7108da1b3 # v9.0.0
+        with:
+          script: |
+            const checks = require('./scripts/pr-checks/pr-checks.js');
+            await checks.syncDefaultLabel({ github, context, core });
@@ -4,11 +4,15 @@
 # comes from [workspace.package] in Cargo.toml. An agent verifies the artifacts and publishes
 # the draft separately; see docs/releasing.md. Tags and pushes to main do not trigger releases.
 # At midnight Eastern, changed main commits build and publish a nightly pre-release.
-# A version with a suffix (0.2.0-rc.1) is a pre-release. Nothing is signed yet.
+# A version with a suffix (0.2.0-rc.1) is a pre-release.
+# The macOS app is signed and notarized when the APPLE_* secrets exist. The Windows binaries and
+# MSI are Authenticode-signed through SignPath Foundation when the SIGNPATH_API_TOKEN secret exists
+# (see the windows job). Nothing else is signed yet.
 #
 #   Linux x86_64, aarch64   AppImage (+ .zsync), .deb, .rpm, .flatpak, .snap, .tar.gz packaging/linux
+#   Arch Linux x86_64, aarch64  .pkg.tar.zst, repackaged from the .tar.gz         the arch job
 #   FreeBSD x86_64          .tar.gz (built in a FreeBSD VM)                        packaging/freebsd
-#   macOS universal         .dmg, and the CLI as a .zip                            packaging/macos
+#   macOS universal         .dmg, and the CLI as a .zip (both archs built in parallel)  packaging/macos
 #   Windows x64, x86, arm64 .msi and a portable .zip; x64 also the plain .exe      packaging/windows
 #   Web                     a .zip of the static site                              packaging/web
 #
@@ -17,6 +21,8 @@
 # releases/latest/download/<name> links in the README keep working across releases.
 #
 # A dry run: dispatch with draft=false (the default). Only the release branch may create drafts.
+# A dry run from any branch also test-signs the Windows files when SIGNPATH_API_TOKEN exists:
+#   gh workflow run release.yml --ref <branch> -f draft=false [-f signpath_signing_policy=test-signing]
 name: Release

 on:
@@ -31,6 +37,10 @@ on:
        description: "Create/update a draft (release branch only; off: build artifacts only)"
        type: boolean
        default: false
+      signpath_signing_policy:
+        description: "SignPath signing policy for the Windows files (empty: the repository variable, else test-signing)"
+        type: string
+        default: ""

 permissions:
  contents: read
@@ -197,12 +207,53 @@ jobs:
          path: dist/release/*.flatpak
          if-no-files-found: error

+  arch:
+    name: Arch Linux ${{ matrix.arch }}
+    needs: [version, linux]
+    if: needs.version.outputs.build == 'true'
+    # makepkg only repackages the tarball's prebuilt binaries, so both architectures build here.
+    runs-on: ubuntu-24.04
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, aarch64]
+    env:
+      VERSION: ${{ needs.version.outputs.version }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+        with:
+          name: release-linux-${{ matrix.arch }}
+          path: dist/linux
+      # The Craft apps' shared Arch packaging (storytold/craft-common-actions, MIT OR Apache-2.0):
+      # makepkg in an archlinux:base-devel container. The package is named after the tarball's
+      # .desktop file (io.tangencylabs.solidcraft) and written as
+      # dist/release/solidcraft-<version>-linux-<arch>.pkg.tar.zst.
+      - uses: storytold/craft-common-actions/actions/arch-package@fa5ef18780cf5e7d5d3b8de068de56cffc83cac5 # main
+        with:
+          tarball: dist/linux/solidcraft-${{ env.VERSION }}-linux-${{ matrix.arch }}.tar.gz
+          arch: ${{ matrix.arch }}
+      - name: Check the package
+        env:
+          PKG: dist/release/solidcraft-${{ env.VERSION }}-linux-${{ matrix.arch }}.pkg.tar.zst
+        run: |
+          tar --zstd -tf "$PKG" | grep -E '^usr/bin/solidcraft$|^usr/bin/solidcraft-cli$|^usr/share/applications/io\.tangencylabs\.solidcraft\.desktop$'
+          tar --zstd -xOf "$PKG" .PKGINFO | grep -E '^(pkgname|pkgver|arch) = '
+          tar --zstd -xOf "$PKG" .PKGINFO | grep -qx 'pkgname = io.tangencylabs.solidcraft'
+      - uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        with:
+          name: release-arch-${{ matrix.arch }}
+          path: dist/release/*.pkg.tar.zst
+          if-no-files-found: error
+


  snap:
    name: Snap ${{ matrix.arch }}
    needs: [version, linux]
    if: needs.version.outputs.build == 'true'
+    # The Snap Store hasn't accepted SolidCraft yet, so a snap failure never holds up a release.
+    continue-on-error: true
    # Repackages the Linux job's tarball, like the Flatpak. On 24.04 because the core24 base is
    # Ubuntu 24.04, which lets snapcraft build on the runner itself (--destructive-mode).
    runs-on: ${{ matrix.runner }}
@@ -286,18 +337,26 @@ jobs:
            export CARGO_TARGET_DIR=/var/tmp/solidcraft-target CARGO_BUILD_JOBS=4
            bash packaging/freebsd/package.sh
            tar -tzf dist/release/solidcraft-*-freebsd-x86_64.tar.gz \
-              | grep -E '/bin/solidcraft$|/bin/solidcraft-cli$|/share/applications/ai\.storyteller\.solvecraft\.desktop$|/share/doc/solidcraft/THIRD-PARTY-LICENSES\.txt$'
+              | grep -E '/bin/solidcraft$|/bin/solidcraft-cli$|/share/applications/io\.tangencylabs\.solidcraft\.desktop$|/share/doc/solidcraft/THIRD-PARTY-LICENSES\.txt$'
      - uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
        with:
          name: release-freebsd-x86_64
          path: dist/release/*
          if-no-files-found: error

-  macos:
-    name: macOS universal
+  # The two halves of the universal binary build in parallel on their own runners (each alone
+  # took about half of the old single job's 45 minutes); `macos` below joins and packages them.
+  macos-build:
+    name: macOS build ${{ matrix.arch }}
    needs: version
    if: needs.version.outputs.build == 'true'
    runs-on: macos-14
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - { arch: aarch64, target: aarch64-apple-darwin }
+          - { arch: x86_64, target: x86_64-apple-darwin }
    env:
      SOLIDCRAFT_VERSION: ${{ needs.version.outputs.version }}
      SOLIDCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
@@ -305,12 +364,58 @@ jobs:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: dtolnay/rust-toolchain@stable
        with:
-          targets: aarch64-apple-darwin, x86_64-apple-darwin
+          targets: ${{ matrix.target }}
      - uses: Swatinem/rust-cache@6323deb102c322ba6fcbdcafc7e3dddab59af2b6 # v2.9.2
        with:
-          key: release-macos-universal
-      - name: Build and package (dmg, CLI zip; the dmg is mounted and checked)
-        run: packaging/macos/package.sh --arch universal
+          key: release-macos-${{ matrix.arch }}
+      - name: Build
+        run: packaging/macos/package.sh --build-only ${{ matrix.target }}
+      # Not named release-*: the release job collects every release-* artifact as an asset.
+      - uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        with:
+          name: macos-bin-${{ matrix.arch }}
+          path: |
+            target/${{ matrix.target }}/release/solidcraft
+            target/${{ matrix.target }}/release/solidcraft-cli
+            target/${{ matrix.target }}/release/solvecraft-cli
+          if-no-files-found: error
+
+  macos:
+    name: macOS universal
+    needs: [version, macos-build]
+    if: needs.version.outputs.build == 'true'
+    runs-on: macos-14
+    env:
+      SOLIDCRAFT_VERSION: ${{ needs.version.outputs.version }}
+      SOLIDCRAFT_BUILD_DATE: ${{ needs.version.outputs.date }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+        with:
+          name: macos-bin-aarch64
+          path: target/aarch64-apple-darwin/release
+      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
+        with:
+          name: macos-bin-x86_64
+          path: target/x86_64-apple-darwin/release
+      - name: Set up Developer ID signing and notarization
+        # Optional until the APPLE_* secrets exist (docs/releasing.md, "macOS signing"). Without
+        # them (forks, dry runs) the app keeps its ad-hoc signature and is not notarized.
+        env:
+          APPLE_CERTIFICATE_P12: ${{ secrets.APPLE_CERTIFICATE_P12 }}
+          APPLE_CERTIFICATE_PASSWORD: ${{ secrets.APPLE_CERTIFICATE_PASSWORD }}
+          APPLE_API_KEY_P8: ${{ secrets.APPLE_API_KEY_P8 }}
+          APPLE_API_KEY_ID: ${{ secrets.APPLE_API_KEY_ID }}
+          APPLE_API_ISSUER: ${{ secrets.APPLE_API_ISSUER }}
+        run: packaging/macos/signing.sh --setup
+      - name: Join, sign, package and check (dmg, CLI zip; the dmg is mounted and checked)
+        run: |
+          # Artifacts don't keep the executable bit.
+          chmod +x target/*-apple-darwin/release/solidcraft target/*-apple-darwin/release/solidcraft-cli target/*-apple-darwin/release/solvecraft-cli
+          packaging/macos/package.sh --arch universal --skip-build ${MACOS_SIGN_IDENTITY:+--sign}
+      - name: Remove the signing keychain and API key
+        if: always()
+        run: packaging/macos/signing.sh --cleanup
      - uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
        with:
          name: release-macos
@@ -321,7 +426,14 @@ jobs:
    name: Windows ${{ matrix.arch }}
    needs: [version, icons]
    if: needs.version.outputs.build == 'true'
+    # Must stay a GitHub-hosted runner, like every job before it: SignPath's open-source policy
+    # only signs builds whose jobs all ran on GitHub-hosted runners.
    runs-on: windows-latest
+    # actions: read lets the SignPath action read this job's details and fetch the uploaded
+    # artifact with GITHUB_TOKEN (the workflow default above grants contents: read only).
+    permissions:
+      contents: read
+      actions: read
    strategy:
      fail-fast: false
      matrix:
@@ -332,6 +444,16 @@ jobs:
          - { arch: arm64, target: aarch64-pc-windows-msvc }
    env:
      SOLIDCRAFT_VERSION: ${{ needs.version.outputs.version }}
+      # Authenticode signing through SignPath Foundation (docs/releasing.md, "Windows signing").
+      # Only when the API token secret exists: forks and repositories without it build unsigned,
+      # exactly as before. `if:` can't read secrets, so the check goes through this variable.
+      SIGN_WINDOWS: ${{ secrets.SIGNPATH_API_TOKEN != '' }}
+      # The one switch between the self-signed test certificate (test-signing) and the real one
+      # (release-signing): a dispatch input, else the SIGNPATH_SIGNING_POLICY repository variable,
+      # else test-signing.
+      SIGNPATH_SIGNING_POLICY: ${{ inputs.signpath_signing_policy || vars.SIGNPATH_SIGNING_POLICY || 'test-signing' }}
+      SIGNPATH_ORGANIZATION_ID: fa603ff4-c702-404b-8588-a524371c7a4e
+      SIGNPATH_PROJECT_SLUG: solidcraft
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - uses: actions/download-artifact@9000827ccba6bdab643e8b6fd33ac0654aef8333 # v8.0.2
@@ -350,10 +472,109 @@ jobs:
          dotnet tool install --global wix --version 5.0.2
          wix extension add -g WixToolset.UI.wixext/5.0.2 WixToolset.Util.wixext/5.0.2
      - name: Build and package (msi, portable zip)
+        if: env.SIGN_WINDOWS != 'true'
        shell: pwsh
        env:
          SOLIDCRAFT_ICONS: ${{ github.workspace }}/icons
        run: ./packaging/windows/package.ps1 -Arch ${{ matrix.arch }}
+
+      # ---- signed path ---------------------------------------------------------------------------
+      # SignPath's GitHub integration (docs.signpath.io/trusted-build-systems/github): the files go
+      # up as a workflow artifact, SignPath fetches that artifact itself (so it can verify it came
+      # from this workflow run), signs it, and the action downloads the signed copy. GitHub stores
+      # artifacts as zips, so packaging/windows/signpath-artifact-configuration.xml (pasted into the
+      # SignPath project) describes a zip holding the files at its top level.
+      # Two rounds: the .exe files first, so the MSI, the portable zip and the plain .exe all carry
+      # signed binaries; then the MSI built from them.
+      - name: Build and stage the binaries for signing
+        if: env.SIGN_WINDOWS == 'true'
+        shell: pwsh
+        env:
+          SOLIDCRAFT_ICONS: ${{ github.workspace }}/icons
+        run: ./packaging/windows/package.ps1 -Arch ${{ matrix.arch }} -Phase stage
+      - name: Upload the unsigned binaries
+        id: unsigned-exes
+        if: env.SIGN_WINDOWS == 'true'
+        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        with:
+          name: signpath-unsigned-exes-windows-${{ matrix.arch }}
+          path: target/windows-package/${{ matrix.arch }}/*.exe
+          if-no-files-found: error
+          retention-days: 3
+      - name: Sign the binaries (SignPath, ${{ env.SIGNPATH_SIGNING_POLICY }})
+        if: env.SIGN_WINDOWS == 'true'
+        uses: signpath/github-action-submit-signing-request@f6d04783b4569d051e0c80105fe66e82819d0092 # v3.0
+        with:
+          api-token: ${{ secrets.SIGNPATH_API_TOKEN }}
+          organization-id: ${{ env.SIGNPATH_ORGANIZATION_ID }}
+          project-slug: ${{ env.SIGNPATH_PROJECT_SLUG }}
+          signing-policy-slug: ${{ env.SIGNPATH_SIGNING_POLICY }}
+          github-artifact-id: ${{ steps.unsigned-exes.outputs.artifact-id }}
+          wait-for-completion: true
+          # release-signing requests wait for a person to approve them in SignPath; give that an
+          # hour instead of the default 10 minutes. test-signing requests finish in seconds.
+          wait-for-completion-timeout-in-seconds: 3600
+          output-artifact-directory: target/windows-package/signed-exes-${{ matrix.arch }}
+      - name: Put the signed binaries in place
+        if: env.SIGN_WINDOWS == 'true'
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $stage = "target/windows-package/${{ matrix.arch }}"
+          foreach ($exe in 'solidcraft.exe', 'solidcraft-cli.exe', 'solvecraft-cli.exe') {
+            $signed = "target/windows-package/signed-exes-${{ matrix.arch }}/$exe"
+            # The artifact configuration matches each file optionally, so check that every file
+            # actually came back signed rather than trusting the request's success.
+            $sig = Get-AuthenticodeSignature $signed
+            if (-not $sig.SignerCertificate) { throw "$exe came back from SignPath without a signature ($($sig.Status))" }
+            # The test certificate is self-signed, so Status is not Valid until release-signing.
+            Write-Output "$exe signed by $($sig.SignerCertificate.Subject) (status: $($sig.Status))"
+            Copy-Item -Force $signed "$stage/$exe"
+          }
+      - name: Package the signed binaries (msi, portable zip)
+        if: env.SIGN_WINDOWS == 'true'
+        shell: pwsh
+        env:
+          SOLIDCRAFT_ICONS: ${{ github.workspace }}/icons
+        run: ./packaging/windows/package.ps1 -Arch ${{ matrix.arch }} -Phase package
+      - name: Upload the unsigned MSI
+        id: unsigned-msi
+        if: env.SIGN_WINDOWS == 'true'
+        uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
+        with:
+          name: signpath-unsigned-msi-windows-${{ matrix.arch }}
+          path: dist/release/*.msi
+          if-no-files-found: error
+          retention-days: 3
+      - name: Sign the MSI (SignPath, ${{ env.SIGNPATH_SIGNING_POLICY }})
+        if: env.SIGN_WINDOWS == 'true'
+        uses: signpath/github-action-submit-signing-request@f6d04783b4569d051e0c80105fe66e82819d0092 # v3.0
+        with:
+          api-token: ${{ secrets.SIGNPATH_API_TOKEN }}
+          organization-id: ${{ env.SIGNPATH_ORGANIZATION_ID }}
+          project-slug: ${{ env.SIGNPATH_PROJECT_SLUG }}
+          signing-policy-slug: ${{ env.SIGNPATH_SIGNING_POLICY }}
+          github-artifact-id: ${{ steps.unsigned-msi.outputs.artifact-id }}
+          wait-for-completion: true
+          wait-for-completion-timeout-in-seconds: 3600
+          output-artifact-directory: target/windows-package/signed-msi-${{ matrix.arch }}
+      - name: Put the signed MSI in place
+        if: env.SIGN_WINDOWS == 'true'
+        shell: pwsh
+        run: |
+          $ErrorActionPreference = 'Stop'
+          $msi = Get-Item "dist/release/*.msi"
+          $signed = "target/windows-package/signed-msi-${{ matrix.arch }}/$($msi.Name)"
+          $sig = Get-AuthenticodeSignature $signed
+          if (-not $sig.SignerCertificate) { throw "$($msi.Name) came back from SignPath without a signature ($($sig.Status))" }
+          Write-Output "$($msi.Name) signed by $($sig.SignerCertificate.Subject) (status: $($sig.Status))"
+          Copy-Item -Force $signed $msi.FullName
+          "Windows ${{ matrix.arch }}: Authenticode-signed through SignPath (policy $env:SIGNPATH_SIGNING_POLICY, $($sig.SignerCertificate.Subject))." >> $env:GITHUB_STEP_SUMMARY
+      - name: Note the unsigned build
+        if: env.SIGN_WINDOWS != 'true'
+        shell: pwsh
+        run: '"Windows ${{ matrix.arch }}: unsigned (no SIGNPATH_API_TOKEN secret)." >> $env:GITHUB_STEP_SUMMARY'
+
      - uses: actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9 # v7.0.2
        with:
          name: release-windows-${{ matrix.arch }}
@@ -390,7 +611,7 @@ jobs:

  release:
    name: GitHub Release or dry-run artifacts
-    needs: [version, linux, flatpak, snap, freebsd, macos, windows, web]
+    needs: [version, linux, flatpak, arch, snap, freebsd, macos, windows, web]
    if: needs.version.outputs.build == 'true'
    runs-on: ubuntu-latest
    permissions:
@@ -416,7 +637,7 @@ jobs:
          shopt -s nullglob
          for f in "solidcraft-$VERSION-"*; do
            case "$f" in
-              *.msi | *-portable.zip | *.dmg | *.AppImage | *.deb | *.rpm | *.flatpak | *.snap)
+              *.msi | *-portable.zip | *.dmg | *.AppImage | *.deb | *.rpm | *.flatpak | *.snap | *.pkg.tar.zst)
                cp -- "$f" "solidcraft-${f#"solidcraft-$VERSION-"}" ;;
            esac
          done
@@ -7,6 +7,11 @@
 /.claude/worktrees/
 /target-snapshot
 __pycache__/
+.vscode/

 # cargo-mutants output (docs/mutation-testing.md)
 mutants.out*/
+
+# external corpus downloads (cargo xtask external-corpus, #1397): fetched at test time,
+# hash-pinned in tests/external-corpus.toml; never commit case data
+/corpus/
@@ -1,206 +1,47 @@
-# SolidCraft — instructions for agents
+# SolidCraft: instructions for agents

-SolidCraft is a clean-room, open-source, pure-Rust parametric 3D CAD application:
-sketches with a constraint solver, a parametric timeline of features, a B-rep
-kernel, and a desktop UI that agents can drive. Projects published by
-[storytold](https://github.com/storytold) can serve as references for implementation conventions.
-Any code adapted from other projects (MIT OR Apache-2.0) is noted in ATTRIBUTION.md.
+SolidCraft is a clean-room, pure-Rust parametric 3D CAD app (sketch solver, feature timeline, B-rep kernel, an egui UI that agents drive). This file is a router: the hard rules, then the skill to read for your task. Humans: CONTRIBUTING.md.

-## Product name
-SolidCraft everywhere: crates `solidcraft-*`, binaries `solidcraft` and `solidcraft-cli`,
-`.solidcraft` designs, the `solidcraft/N` format tag, `SOLIDCRAFT_*` environment variables,
-settings and recovery folders, the MCP server name, docs, CI and packaging. The old name
-survives only in the explicit compatibility shims listed in `docs/compatibility.md`; don't add
-new uses of it anywhere else. Public docs/web/Flatpak deployments use project Pages
-`/solidcraft/`; do not add permanent old-name Pages aliases.
+## Start here
+Work: ROADMAP.md, "Where help is wanted most" in CONTRIBUTING.md, issues labelled `help wanted`, `good first issue`, `needs-triage`; architecture in `docs/architecture.md`. Act when the code, docs and rules settle a question; ask only when it changes what users see. Local `plan/` notes are optional.

-## Start every session here
-1. Read `plan/STATUS.md` (current milestone, next task), then the task in `plan/execution-plan.md`
-   and the relevant `plan/architecture.md` section.
-2. Kernel and library decisions: `plan/adr/0001-geometry-kernel.md` (what we may depend on, what
-   is rejected for licence reasons).
-3. Follow the autonomous operation protocol (`plan/execution-plan.md` §6). Don't stop to ask
-   unless it lists the decision as the owner's.
+## Hard rules (what enforces each)
+- Independent: never copy another product's code, icons, text or templates; never drive or take data from commercial CAD. `skills/solidcraft-ground-rules/SKILL.md`.
+- No GPL/LGPL/AGPL code, not even reading it (OpenCASCADE, FreeCAD, SolveSpace, CadQuery, LibreCAD, QCAD): `cargo xtask licences --check`.
+- Every asset is original or openly licensed with a row in ATTRIBUTION.md; read `assets/AGENTS.md` before icon work: `cargo xtask assets`, `cargo xtask icons`.
+- Never crash: no unwrap/expect/panic/unsafe in non-test code (unsafe allowlist in crash-safety), errors are `Result`, input is hostile: clippy `-D warnings`, `hostile_params_never_panic`.
+- Everything is a command and programmatic calls never open dialogs: `skills/solidcraft-commands/SKILL.md`.
+- Layering (geom, sketch/kernel/render, doc, io, engine, ui-egui, apps); only `crates/kernel` uses truck: `cargo xtask layers`.
+- One outer UI container, one camera path (`navigation::handle`), colours from theme tokens: `cargo xtask ui-containers`.
+- Application code is Rust only and builds for wasm: `cargo xtask wasm`, `cargo xtask web-offline-test`.
+- The product name is SolidCraft; the old name lives only in `docs/compatibility.md`.
+- Sorted lists (message catalogs, `mod` lines, languages) stay sorted: `cargo xtask lists`. Never edit generated files (`docs/features.md`, `THIRD-PARTY-LICENSES.txt`) in a PR.
+- A design-format change is ONE new file in `crates/doc/src/format/pending/`: `scripts/test-format-pending.sh`.
+- A command has input and output schemas (will become required; `schema/unconverted.txt` only shrinks): `skills/solidcraft-commands/SKILL.md`.
+- New UI strings go in `assets/locales/pending/<slug>.json`, ATTRIBUTION rows in `attribution/pending/<slug>.md`: `cargo xtask lists`.
+- A changed default keeps the old behaviour behind a preference and fills the PR's `Changes a default:` line, and no second PR for an issue a lower-numbered one closes: `pr-checks.yml`.
+- A regression test goes in the area's existing test file, never a per-bug file (#3226).
+- Look at open PRs first, claim with a draft PR (lowest number wins), one topic per PR, never force-push `main`, no pushes just to catch up with `main`: `skills/solidcraft-contributing/SKILL.md`.
+- Show observable changes with real screenshots or a recording, captured yourself.
+- Run `cargo xtask ci` before every commit, without switching branches while it runs. `cargo xtask skills` keeps this file and `skills/` honest.

-`plan/` is gitignored (local only).
-
-## Never crash
-People trust SolidCraft with their designs; a crash loses their work. **This outranks feature work.**
- **No panics in non-test code:** no `unwrap()`, `expect()`, `panic!`, `unreachable!`, `todo!`,
-  `unimplemented!`; no `unsafe` (`unsafe_code = "forbid"`). The exceptions, in the app crate and in
-  `crates/threedx-client` (which deny it instead), have no safe API: the macOS-only
-  `crates/threedx-client/src/macos.rs` (loads the 3Dconnexion driver's client framework at run time
-  and calls through its function pointers), two functions in
-  `apps/solidcraft/src/open_documents.rs` (macOS hands Finder files only to an Objective-C
-  method), the Windows-only `apps/solidcraft/src/native_crash.rs` (the exception filter that
-  records crashes inside native code such as graphics drivers) and the Windows-only
-  `apps/solidcraft/src/native_frame.rs` (the window procedure that answers the resize-border hit
-  test of the window without OS decorations).
- **Errors are `Result<T, E>`** through the crate's error type and `?`. An unfinished feature
-  returns an error ("not supported yet: …"); it never panics.
- **Input-derived numbers are hostile** (command parameters, design files, control-channel
-  input): `get()` not `[i]`, finite checks, caps on sizes and loop counts.
- **Third-party kernel calls are guarded:** everything that calls `truck` goes through
-  `solidcraft_kernel::guard`, which turns a panic into `KernelError::Internal`.
- **Last-resort guard:** `Session::execute` runs every command under `catch_unwind`; an escaped
-  panic restores the design and reports `EngineError::Internal`.
- **Crash reports:** the desktop app writes every panic and every unclean exit to a local crash folder,
-  with the design and the commands that reproduce it (`solidcraft_engine::crash`, docs/crash-reports.md).
-  When someone says the app crashed, look there first: `solidcraft-cli crashes`, `crashes show <id>`,
-  `crashes replay <id>` (or the `diagnostics.crash_reports` command / MCP `crash_reports` tool).
- **Prove it:** every crash fix lands with a regression test (see `hostile_params_never_panic`); a
-  crash report's `design.solidcraft` + `replay.json` is the test's starting point.
- **Where tests go:** a regression test goes into the existing test file for its area (booleans, blends,
-  shell, sweep, STEP, naming…), never a new file named after the bug (#3226).
- Every production crate root carries
-  `#![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]`.
-
-## Non-negotiables
- **Independent.** SolidCraft is independent. Behaviour is designed from public documentation,
-  general CAD conventions and user feedback. Reference tests use analytic values and open-source
-  tools. Never copy another product's code, icons, artwork, help text, tooltips, templates or
-  materials. File formats come from public specifications.
- **No commercial CAD products.** Agents must not drive, script, automate or extract data from
-  commercial CAD products (Fusion, SolidWorks, Onshape, …) for this project: no test data,
-  measurements, command lists, ids or files produced with them.
- **Never read, copy or link GPL/LGPL/AGPL code**: OpenCASCADE, FreeCAD (incl. planegcs),
-  SolveSpace, CadQuery/OCP, LibreCAD, QCAD — don't even read their sources. (`tools/freecad-oracle/`
-  runs FreeCAD as a separate program through its public scripting API to compute reference values;
-  nothing from FreeCAD is linked, vendored or shipped.) The sketch solver and the blend
-  operations are our own.
- **Assets — absolutely essential.** SolidCraft contains **no iconography, images, fonts or
-  artwork from commercial CAD products — ever.** Command icons are the original SVG masters in
-  `assets/icons/ui/design/svg/`, compiled through `crates/ui-egui/src/icon_svg.rs`.
-  **Before any icon, icon assignment or media edit, read `assets/AGENTS.md`,
-  `assets/icons/ui/AGENTS.md` and `assets/icons/ui/STYLE_GUIDE.md`.** Use the canonical
-  bases and named finished references there; never invent a parallel icon style. Any file asset must be original or openly licensed and **must have a row in ATTRIBUTION.md**
-  (`cargo xtask assets` enforces it). Screenshots of commercial CAD software are never committed.
-  Breaking this rule is the most serious mistake you can make in this repo.
- **Everything is a command.** User-visible behaviour = a command in `crates/engine/src/cmd/*`
-  (`CommandSpec`: id = our own dotted, lower-case id `<area>.<thing>[.<variant>]` such as
-  `solid.extrude` or `sketch.rectangle.two_point`, never another product's command id; label;
-  toolbar tab and panel; icon; shortcut; params doc; `enabled`; JSON `run`) + tests. The toolbar,
-  dialogs, sketch tools, palette, scripts, CLI and control channel all reach the same commands.
- **Programmatic calls never open dialogs.** `engine.execute` runs the JSON form; only toolbar
-  clicks (`ui.start`) start interactive tools and dialogs, which then run commands.
- **Layering** is enforced by `cargo xtask layers`: L0 `geom` → L1 `sketch`, `kernel`, `render`
-  → L2 `doc` → L3 `io` → L4 `engine` → L5 `ui-egui` → apps. Nothing below L5 depends on
-  egui/eframe/winit/wgpu/rfd. **The UI crate is swappable.** Only `crates/kernel` may use `truck`.
- **The UI is thin**: panels read engine state and act through `app.run(id, params)` /
-  `app.start(id)`. Colours come from `theme::Tokens`.
- **One set of camera controls**: every page or canvas with a camera (viewport, Render
-  preview, future flat pattern or drawing pages) calls `navigation::handle` with its `NavCaps`
-  (orbit off for flat 2D pages). New canvases must use `navigation::handle`; never hand-roll
-  camera input (a test rejects it).
- **Application code is Rust only.** Units are millimetres and radians internally; Z is up.
-  Local asset authoring, lint and review tools use Python 3.11+ as documented in
-  `assets/AGENTS.md`; Python is not an application runtime dependency. The application exception is
-  JavaScript the browser requires: the service worker `apps/solidcraft-web/sw.js` (browsers only
-  run service workers as JavaScript) and the small inline scripts in `apps/solidcraft-web/index.html`.
-  Keep them minimal; `cargo xtask web-offline-test` covers the service worker.
- **Quality gates** before every commit: `cargo xtask ci` (fmt, clippy -D warnings, tests,
-  assets, layers). Commit after every feature arc that builds.
- **Publishing**: the repository is github.com/tangency-labs/solidcraft. Changes land through
-  **pull requests** and the **merge queue**: push a branch and open a PR. The heavy CI jobs start
-  when a maintainer adds `approved-for-ci` after reviewing the code. Approved PRs go into the queue
-  with `gh pr merge N -R tangency-labs/solidcraft --squash --auto`; the queue runs the full suite
-  on each group before it lands on `main`. Keep each PR to one topic and one issue, and never
-  force-push `main`. Never commit `plan/`, build dirs (`target*/`) or generated reference data;
-  check `git ls-files` before pushing.
- **Never break wasm**: everything below the apps must build for `wasm32-unknown-unknown`
-  (`cargo xtask wasm`, part of `cargo xtask ci`).
-
-## Showing and following through on changes
-
- Help reviewers see what is broken or changed. For observable CAD, UI or model behavior,
-  issues and PRs must include actual descriptive screenshots or a short recording from a
-  small reproduction. This includes kernel, geometry, assembly and backend changes whose
-  effects can be shown in the app. Coding agents should run the app and capture this evidence
-  themselves; do not ask a human for evidence the agent can produce. Show the actual failure
-  or result, preferably before and after, with brief reproduction steps, expected/actual
-  behavior and annotations that point out the relevant detail.
- Flowcharts and Mermaid diagrams cannot substitute for screenshots or recordings of visible
-  behavior. Use diagrams for architectural reasoning when actual screenshots cannot illustrate
-  the point. Changes with no useful observable behavior do not need screenshot or video evidence.
- Use a small public-safe example and check for private designs, paths, account details or
-  other sensitive content before sharing. Attach media to the issue/PR or link to an accessible
-  recording; do not commit generated screenshots or videos just to provide review evidence.
- Throughout the work and before handoff, check the relevant PR's merge status. Don't push to
-  an open PR only to catch up with `main` (no merge of `main`, no Update branch, no rebase for
-  that alone): every push restarts the whole CI run, and `main`'s own run catches what lands in
-  between, to be fixed forward. When you push a change anyway, or GitHub reports a conflict,
-  rebase onto the latest `main` (push your own branch with `--force-with-lease`); never merge
-  `main` into a PR. Resolve conflicts without discarding others' work; never force-push `main`.
-  Don't re-run CI on an unchanged commit: a real failure fails again. Re-run only a job that
-  runner trouble cancelled, with "Re-run failed jobs". Report the PR state you checked and any
-  conflicts resolved. If a PR remains open, keep monitoring it while the task is active and
-  make its pending status clear at handoff; do not claim it merged without checking.
-
-## Before you start: look at what is already open
- Work with an authenticated GitHub CLI (`gh auth status`) and `git`; the checks below need both.
- Pull the whole list, not one search: `gh pr list -R tangency-labs/solidcraft --state open --limit 500`
-  (drafts included) and `gh issue list -R tangency-labs/solidcraft --state open --limit 500`. Look for
-  work on the same issue, the same feature under another number, and PRs that change the files
-  you are about to change (`gh pr list ... --json number,title,files`).
- If someone already has it, comment on their PR or issue instead of opening a second one. Two
-  PRs for one change can't both land, and one of them is wasted work and CI.
-
-## Claim = a draft PR
- Before working on issue #N, check nobody has it: `gh pr list -R tangency-labs/solidcraft --state open --search "#N"`.
- If none, branch from the latest `origin/main`, `git commit --allow-empty -m "claim: #N"`, push,
-  and open a **draft** PR titled `<summary> (#N)` right away. **The lowest-numbered open PR for an
-  issue wins**; if yours lost, close it. Opening the PR is the claim: the bot assigns you and
-  labels the issue `in progress` (or says on your PR who holds it). Reference `#N` in the PR title
-  so the bot can find it. Don't claim by editing files; comment `/claim` on the issue only to stake
-  a claim before you have a branch.
- Push work in progress at least daily. A draft with no pushes for 72 hours may be taken over:
-  comment on it first, then open your own claim (you may start from its branch).
-  This takeover policy is separate from the bot's automatic cleanup deadlines in CONTRIBUTING.md.
- On a shared build machine, check the load before a big build (`cut -d' ' -f1 /proc/loadavg`)
-  and wait while it is over 24; build with `nice`.
-
-## Design file format
-A change that saves something new in a design adds ONE file, `crates/doc/src/format/pending/<name>.rs`
-(a `//!` note, and `pub fn step` if older designs must be rewritten). Never edit `FORMAT`,
-`JSON_STEPS`, the history in `format.rs`, another change's file or a `v<N>/` folder: the build
-works out the number (the next one while anything is pending), and the release folds pending
-changes into `v<N>/` with `scripts/fold-format-pending.sh`. See CONTRIBUTING.md.
-
-## Application releases
-Development pushes are not application releases. Follow `docs/releasing.md` when asked to
-prepare or ship a release: choose the version from the actual changes, update Cargo.toml and
-Cargo.lock, pass the quality gates, advance `release` without force-pushing, and verify the
-resulting draft and its artifacts. When shipping is authorized, publish that verified draft
-and confirm its tag and downstream deployment. Do not auto-release every push to `main`, infer
-version bumps solely from commit prefixes, overwrite published versions, or push release tags
-before the draft is verified.
-
-## Running and looking at the app
- `cargo run --release -p solidcraft -- --sample --control PORT` (sample design + control channel).
-  Pick a free port. Without a display, run it under `Xvfb :99` with `DISPLAY=:99`.
- Drive it with JSON lines on `127.0.0.1:PORT` (see `docs/control-protocol.md`). The first
-  request on a connection carries the launch's token as `"token"`: read it from
-  `~/.local/share/solidcraft/control/PORT.token`, or start the app with
-  `SOLIDCRAFT_CONTROL_TOKEN=$(openssl rand -hex 32)` and send that.
-  - `{"id":1,"method":"engine.execute","params":{"command":"solid.extrude","params":{"distance":20}}}`
-  - `{"id":2,"method":"ui.start","params":{"command":"sketch.create"}}` then `ui.click {x, y}`
-  - `{"id":3,"method":"ui.screenshot","params":{"path":"/tmp/shot.png"}}` then read the PNG.
- **For UI work, look at the result** (screenshot, read the PNG). Without a window use
-  `ui.render` or `solidcraft-cli snapshot`.
- Headless: `solidcraft-cli run script.json --out part.step`, `solidcraft-cli eval design.solidcraft`,
-  `solidcraft-cli snapshot script.json --out shot.png`, `solidcraft-cli commands`.
- Reference tests: `cargo xtask oracle` replays `tests/oracle/*/recipe.json` and compares with
-  each case's `expected.json` (analytic or FreeCAD values; writes `docs/oracle.md`). Expected
-  values never come from a commercial CAD product.
- Build with `CARGO_TARGET_DIR=<repo>/target`. Windows: `cargo xwin build --release --target x86_64-pc-windows-msvc -p solidcraft`.
-
-## Roadmap
-`ROADMAP.md` (committed) tracks status, milestones and estimates. Update it whenever a
-milestone task lands. `docs/features.md` (SolidCraft's commands by area, from the registry) and
-`THIRD-PARTY-LICENSES.txt` are regenerated on `main` after each merge by the Generated files
-workflow; never regenerate them in a PR.
-
-## Lists many PRs add to
-Keep them conflict-free (CONTRIBUTING.md, "Lists many changes add to"): message catalogs sorted
-(`cargo xtask lists --fix`), `mod` lines in their sorted group, the language list English first
-then by id, generated files left to `main`, and a design-format change as one new file.
+## Working on X: read the skill first
+| Working on | Read |
+|---|---|
+| A PR, a claim, review, CI or evidence | `skills/solidcraft-contributing/SKILL.md` |
+| Licences, assets, clean-room, the name | `skills/solidcraft-ground-rules/SKILL.md` |
+| Non-test Rust, hostile input, a crash report | `skills/solidcraft-crash-safety/SKILL.md` |
+| A command, a crate boundary | `skills/solidcraft-commands/SKILL.md` |
+| A dialog, panel, camera, icon, colour | `skills/solidcraft-ui/SKILL.md` |
+| Labels, messages, translations | `skills/solidcraft-ui-text/SKILL.md` |
+| Saving something new in a design, import, export | `skills/solidcraft-file-formats/SKILL.md` |
+| Preferences, a changed default | `skills/solidcraft-preferences/SKILL.md` |
+| Writing or running tests | `skills/solidcraft-tests/SKILL.md` |
+| Slow work, the window thread, wasm | `skills/solidcraft-performance/SKILL.md` |
+| Releases, installers, packages | `skills/solidcraft-packaging/SKILL.md` |
+| Running the app, control channel, MCP tools | `skills/solidcraft-agent-tools/SKILL.md` |
+| Building a part over MCP | `skills/solidcraft-modeling/SKILL.md` |
+| Changing an existing design | `skills/solidcraft-editing/SKILL.md` |
+| A bug report, a crash, a wrong result | `skills/solidcraft-reporting/SKILL.md` |
+| Checking, porting, designs in git | `skills/solidcraft-checking/SKILL.md` |
+| Assemblies, joints, motion | `skills/solidcraft-mechanisms/SKILL.md` |
@@ -14,8 +14,33 @@ Editable drawing code, native projects and shipped exports are collected under `

 | File | Author | Source | Licence |
 |---|---|---|---|
+| assets/render/catalog/capabilities.json | SolidCraft contributors | Byte-identical runtime export of docs/render-materials/capabilities.json; generated and checked by tools/render-library/generate.py | MIT OR Apache-2.0 |
+| assets/render/catalog/environments.json | SolidCraft contributors | Byte-identical runtime export of docs/render-materials/environments.json; generated and checked by tools/render-library/generate.py | MIT OR Apache-2.0 |
+| assets/render/catalog/lighting.json | SolidCraft contributors | Byte-identical runtime export of docs/render-materials/lighting.json; generated and checked by tools/render-library/generate.py | MIT OR Apache-2.0 |
+| assets/render/catalog/materials.json | SolidCraft contributors | Byte-identical runtime export of docs/render-materials/materials.json; generated and checked by tools/render-library/generate.py | MIT OR Apache-2.0 |
+| assets/render/catalog/quality-presets.json | SolidCraft contributors | Byte-identical runtime export of docs/render-materials/quality-presets.json; generated and checked by tools/render-library/generate.py | MIT OR Apache-2.0 |
+| assets/render/catalog/scene-presets.json | SolidCraft contributors | Byte-identical runtime export of docs/render-materials/scene-presets.json; generated and checked by tools/render-library/generate.py | MIT OR Apache-2.0 |
+| examples/chebyshev-motion-trace.json | SolidCraft contributors | Original parametric Chebyshev lambda mechanism and associative-trace demo, constructed from analytic circle intersections; classical link proportions documented at https://doi.org/10.1002/rcs.70095; no external CAD geometry or artwork | MIT OR Apache-2.0 |
+| examples/material-card.json | SolidCraft contributors | original analytic box and explicitly synthetic engineering card; invented illustrative constants, no external material dataset | MIT OR Apache-2.0 |
+| examples/studio/author_sweep.py | SolidCraft contributors | original editable CAD scene and authoring metadata; no external assets | MIT OR Apache-2.0 |
+| examples/studio/author_scene.py | SolidCraft contributors | original editable CAD scene and authoring metadata; no external assets | MIT OR Apache-2.0 |
+| examples/studio/materials.json | SolidCraft contributors | original editable CAD scene and authoring metadata; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-exploded-sweep.json | SolidCraft contributors | original editable CAD scene and authoring metadata; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-exploded-render.json | SolidCraft contributors | original editable CAD scene and authoring metadata; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-exploded.json | SolidCraft contributors | original editable CAD scene and authoring metadata; no external assets | MIT OR Apache-2.0 |
+| examples/studio/stage1-sweep.json | SolidCraft contributors | original tangent circular-arc CAD cyclorama; no external assets | MIT OR Apache-2.0 |
+| examples/studio/stage1.json | SolidCraft contributors | original editable CAD studio scene; no imported geometry or external image assets | MIT OR Apache-2.0 |
+| examples/studio/stage1-render.json | SolidCraft contributors | original studio camera and lighting parameters | MIT OR Apache-2.0 |
 | examples/render-studio.json | SolidCraft contributors | original procedural box/cylinder enclosure script for the integrated Render workspace | MIT OR Apache-2.0 |
 | examples/render-opaque-studio.json | SolidCraft contributors | original procedural sphere study varying opaque metal fraction and roughness independently; no external assets or engineering data | MIT OR Apache-2.0 |
+| crates/gpu/src/path/denoise.wgsl | SolidCraft contributors | original bounded edge-aware a-trous spatial filter; GPU2 donor d710e31, no external shader source | MIT OR Apache-2.0 |
+| crates/gpu/src/path/denoise_guides.wgsl | SolidCraft contributors | original deterministic centre-ray material and geometry guide pass; GPU2 donor d710e31, no external shader source | MIT OR Apache-2.0 |
+| crates/gpu/src/path/shadows.wgsl | SolidCraft contributors | original bounded area, sun and environment visibility transport; GPU2 donor d710e31, no external shader source | MIT OR Apache-2.0 |
+| crates/gpu/src/path/textures.wgsl | SolidCraft contributors | original planar colour and normal map sampling; GPU2 donor d710e31, no external shader source | MIT OR Apache-2.0 |
+| assets/appearances/starter_pack.rs | SolidCraft contributors | original illustrative optical recipes, authored scalar values and future procedural resource descriptors; no measured or external material dataset | MIT OR Apache-2.0 |
+| examples/material-finishes.json | SolidCraft contributors | original procedural sphere study of six illustrative opaque finishes with generic material densities; no external assets or measured optical data | MIT OR Apache-2.0 |
+| examples/render-path-studio.json | SolidCraft contributors | original procedural opaque enclosure, teal insert and metal fasteners for progressive rendering; no imported models | MIT OR Apache-2.0 |
+| crates/gpu/src/path/path.wgsl | SolidCraft contributors | original software BVH traversal and path integration using the existing SolidCraft surface/studio equations; no external shader source | MIT OR Apache-2.0 |
 | crates/gpu/src/pbr.rs | SolidCraft contributors | original WGSL translation of SolidCraft's opaque surface and fixed studio reference, embedded as Rust source; no external shader code | MIT OR Apache-2.0 |
 | assets/icons/app/macos/source/SolidCraft.icon/icon.json | SolidCraft contributors | approved Icon Composer composition and appearance settings for the original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/app/macos/source/SolidCraft.icon/Assets/02-grid.svg | SolidCraft contributors | original perspective grid with elliptical radial alpha, exported from VectorCraft | MIT OR Apache-2.0 |
@@ -24,10 +49,12 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/icons/app/macos/exports/Assets.car | SolidCraft contributors | Apple actool compilation of assets/icons/app/macos/source/SolidCraft.icon for macOS; contains original artwork only | MIT OR Apache-2.0 |
 | assets/archive/icons/macos-v1/source/icon.vectorcraft | SolidCraft contributors | retained editable historical VectorCraft source, with named face and background layers; redundant exports retired | MIT OR Apache-2.0 |
 | assets/icons/app/macos/exports/icon.icns | SolidCraft contributors | macOS fallback compiled by Apple's actool from the approved assets/icons/app/macos/source/SolidCraft.icon composition | MIT OR Apache-2.0 |
-| docs/screenshots/class-a-blend.png | SolidCraft contributors | screenshot of SolidCraft itself: two boxes bridged by `surface.blend` (a 40x10 sheet, `solidcraft-cli snapshot` of plan/evidence script ev_blend) | MIT OR Apache-2.0 |
-| docs/screenshots/class-a-crown.png | SolidCraft contributors | screenshot of SolidCraft itself: a patch crowned with `surface.patch crown=0.3` over a saddle rim (`solidcraft-cli snapshot`) | MIT OR Apache-2.0 |
-| docs/screenshots/class-a-boundary.png | SolidCraft contributors | screenshot of SolidCraft itself: a patch through two sketch lines built by `surface.boundary` with `crown: 0.4` (`solidcraft-cli snapshot`) | MIT OR Apache-2.0 |
-| docs/screenshots/sample-plate.png | SolidCraft contributors | screenshot of SolidCraft itself (`solidcraft --sample`) | MIT OR Apache-2.0 |
+| assets/models/test_boat.bin | 3DBenchy.com | 3DBenchy.com | Public Domain |
+| assets/models/make_test_boat.py | SolidCraft contributors | original script that packs a model into the compact file above | MIT OR Apache-2.0 |
+| docs/screenshots/class-a-blend.png | SolidCraft contributors | screenshot of SolidCraft itself: a 24 mm and a 10 mm box bridged by a `surface.blend` sheet (G1 at both edges), rendered by the app's `ui.render` in the dark theme with examples/demo/class_a_shots.py | MIT OR Apache-2.0 |
+| docs/screenshots/class-a-crown.png | SolidCraft contributors | screenshot of SolidCraft itself: a patch crowned with `surface.patch crown=0.3` over a skew four-line rim, rendered by the app's `ui.render` in the dark theme with examples/demo/class_a_shots.py | MIT OR Apache-2.0 |
+| docs/screenshots/class-a-boundary.png | SolidCraft contributors | screenshot of SolidCraft itself: a surface through two 3D sketch splines built by `surface.boundary`, rendered by the app's `ui.render` in the dark theme with examples/demo/class_a_shots.py | MIT OR Apache-2.0 |
+| docs/screenshots/sample-plate.png | SolidCraft contributors | screenshot of SolidCraft 0.22.1 itself (`solidcraft --sample`, default dark theme, 1600x1000) | MIT OR Apache-2.0 |
 | assets/samples/exports/0.png | SolidCraft contributors | original Sample Plate from `crates/engine/src/sample.rs`, exported by the SolidCraft thumbnail renderer | MIT OR Apache-2.0 |
 | assets/samples/exports/1.png | SolidCraft contributors | original Sheet Metal Bracket from `crates/engine/src/sample.rs`, exported by the SolidCraft thumbnail renderer | MIT OR Apache-2.0 |
 | assets/samples/exports/2.png | SolidCraft contributors | original Hinge Assembly from `crates/engine/src/sample.rs`, exported by the SolidCraft thumbnail renderer | MIT OR Apache-2.0 |
@@ -35,10 +62,10 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/samples/exports/4.png | SolidCraft contributors | original Bolted Flange from `crates/engine/src/sample.rs`, exported by the SolidCraft thumbnail renderer | MIT OR Apache-2.0 |
 | assets/samples/exports/5.png | SolidCraft contributors | original Vent Plate from `crates/engine/src/sample.rs`, exported by the SolidCraft thumbnail renderer | MIT OR Apache-2.0 |
 | assets/samples/exports/scripts.json | SolidCraft contributors | SHA-256 fingerprints of the original sample scripts, generated with the shipped thumbnails | MIT OR Apache-2.0 |
-| docs/screenshots/demo-0.8.gif | SolidCraft contributors | original screen recording of the actual SolidCraft 0.8 English desktop UI modelling an original Raspberry Pi 4 case (no logos or branding; the engraved text is set in the system's DejaVu Sans Bold), generated with examples/demo/record_ui.sh and its original animated pointer overlay (9× playback) | MIT OR Apache-2.0 |
-| docs/screenshots/demo-0.8.mp4 | SolidCraft contributors | original screen recording of the actual SolidCraft 0.8 English desktop UI modelling an original Raspberry Pi 4 case (no logos or branding; the engraved text is set in the system's DejaVu Sans Bold), generated with examples/demo/record_ui.sh and its original animated pointer overlay (9× playback) | MIT OR Apache-2.0 |
-| docs/screenshots/rover-build.gif | 0xlillith (model); SolidCraft contributors (recording) | screen recording of the actual SolidCraft desktop UI replaying the timeline of the SELENE rover (`Rover-recorded.solidcraft` from https://github.com/0xlillith/solidcraft-rover, an original model by 0xlillith built through SolidCraft MCP); the model's lettering follows Ubuntu Light outlines (Canonical Ltd., Ubuntu Font Licence 1.0, as noted in that repository); the emblem is the SolidCraft project icon (2× playback) | MIT OR Apache-2.0 |
-| docs/screenshots/rover-build.mp4 | 0xlillith (model); SolidCraft contributors (recording) | screen recording of the actual SolidCraft desktop UI replaying the timeline of the SELENE rover (`Rover-recorded.solidcraft` from https://github.com/0xlillith/solidcraft-rover, an original model by 0xlillith built through SolidCraft MCP); the model's lettering follows Ubuntu Light outlines (Canonical Ltd., Ubuntu Font Licence 1.0, as noted in that repository); the emblem is the SolidCraft project icon | MIT OR Apache-2.0 |
+| docs/screenshots/demo.gif | SolidCraft contributors | original screen recording of the actual SolidCraft 0.22.1 English desktop UI (default dark theme, software renderer) modelling an original Raspberry Pi 4 case (no logos or branding; the engraved text is set in the system's DejaVu Sans Bold), generated with examples/demo/record_ui.sh and its original animated pointer overlay (6× playback, idle pauses cut) | MIT OR Apache-2.0 |
+| docs/screenshots/demo.mp4 | SolidCraft contributors | original screen recording of the actual SolidCraft 0.22.1 English desktop UI (default dark theme, software renderer) modelling an original Raspberry Pi 4 case (no logos or branding; the engraved text is set in the system's DejaVu Sans Bold), generated with examples/demo/record_ui.sh and its original animated pointer overlay (6× playback, idle pauses cut) | MIT OR Apache-2.0 |
+| docs/screenshots/rover-build.gif | 0xlillith (model); SolidCraft contributors (recording) | screen recording of the actual SolidCraft 0.22.1 desktop UI (default dark theme, software renderer) replaying the timeline of the SELENE rover (`Rover-recorded.solidcraft` from https://github.com/0xlillith/solidcraft-rover, an original model by 0xlillith built through SolidCraft MCP); the model's lettering follows Ubuntu Light outlines (Canonical Ltd., Ubuntu Font Licence 1.0, as noted in that repository); the emblem is the SolidCraft project icon (15× playback, idle pauses cut, constant-rate camera orbit) | MIT OR Apache-2.0 |
+| docs/screenshots/rover-build.mp4 | 0xlillith (model); SolidCraft contributors (recording) | screen recording of the actual SolidCraft 0.22.1 desktop UI (default dark theme, software renderer) replaying the timeline of the SELENE rover (`Rover-recorded.solidcraft` from https://github.com/0xlillith/solidcraft-rover, an original model by 0xlillith built through SolidCraft MCP); the model's lettering follows Ubuntu Light outlines (Canonical Ltd., Ubuntu Font Licence 1.0, as noted in that repository); the emblem is the SolidCraft project icon | MIT OR Apache-2.0 |
 | docs/design/ux-redesign/model-floating.png | SolidCraft contributors | original UX mockup (Model tab, floating layout) rendered from an HTML mockup that uses the original Technical Accent icon set; no third-party artwork, and not a screenshot of any other CAD product | MIT OR Apache-2.0 |
 | docs/design/ux-redesign/model-compact.png | SolidCraft contributors | original UX mockup (Model tab, compact docked layout) rendered from an HTML mockup that uses the original Technical Accent icon set; no third-party artwork, and not a screenshot of any other CAD product | MIT OR Apache-2.0 |
 | docs/design/ux-redesign/sketch.png | SolidCraft contributors | original UX mockup (Sketch tab) rendered from an HTML mockup that uses the original Technical Accent icon set; no third-party artwork, and not a screenshot of any other CAD product | MIT OR Apache-2.0 |
@@ -74,6 +101,7 @@ Editable drawing code, native projects and shipped exports are collected under `
 | tests/step-conformance/tiny_pin.step | step-conformance contributors | generated from formulas by https://github.com/dan335/step-conformance (corpus/generated, 96f30bb); import regression fixture | CC0-1.0 |
 | tests/step-conformance/torus_ring_nurbs.step | step-conformance contributors | generated from formulas by https://github.com/dan335/step-conformance (corpus/generated, 96f30bb); import regression fixture | CC0-1.0 |
 | tests/step-conformance/washer.step | step-conformance contributors | generated from formulas by https://github.com/dan335/step-conformance (corpus/generated, 96f30bb); import regression fixture | CC0-1.0 |
+| tests/step-regressions/rod_doubled_edge.step | SolidCraft contributors | written by SolidCraft from the commands of #4598 (a bored rod moved 100 mm and exported); import regression fixture | MIT OR Apache-2.0 |
 | tests/oracle/17-loft/reference.stl | SolidCraft contributors | triangulation of our own recipe (tests/oracle/17-loft/recipe.json) built with FreeCAD as an external tool by tools/freecad-oracle | MIT OR Apache-2.0 |
 | tests/oracle/23-bracket-multifeature/reference.stl | SolidCraft contributors | triangulation of our own recipe (tests/oracle/23-bracket-multifeature/recipe.json) built with FreeCAD as an external tool by tools/freecad-oracle | MIT OR Apache-2.0 |
 | tests/oracle/28-blind-pocket-fillets/reference.stl | SolidCraft contributors | triangulation of our own recipe (tests/oracle/28-blind-pocket-fillets/recipe.json) built with FreeCAD as an external tool by tools/freecad-oracle | MIT OR Apache-2.0 |
@@ -94,21 +122,21 @@ Editable drawing code, native projects and shipped exports are collected under `
 | tests/oracle/61-shaft-keyway/reference.stl | SolidCraft contributors | triangulation of our own recipe (tests/oracle/61-shaft-keyway/recipe.json) built with FreeCAD as an external tool by tools/freecad-oracle | MIT OR Apache-2.0 |
 | tests/oracle/63-hinge-knuckle/reference.stl | SolidCraft contributors | triangulation of our own recipe (tests/oracle/63-hinge-knuckle/recipe.json) built with FreeCAD as an external tool by tools/freecad-oracle | MIT OR Apache-2.0 |
 | tests/oracle/65-sketch-gear-tooth/reference.stl | SolidCraft contributors | triangulation of our own recipe (tests/oracle/65-sketch-gear-tooth/recipe.json) built with FreeCAD as an external tool by tools/freecad-oracle | MIT OR Apache-2.0 |
-
 | assets/appearances/library.rs | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
+| assets/appearances/opaque_finishes.rs | SolidCraft contributors | original illustrative opaque finish values; no external dataset, textures or measured engineering data | MIT OR Apache-2.0 |
 | assets/fonts/biz-udp-gothic/OFL.txt | The BIZ UDGothic Project Authors | Unmodified accompanying font licence | SIL OFL 1.1 |
 | assets/fonts/ibm-plex-mono/OFL.txt | IBM Corp. | Unmodified accompanying font licence | SIL OFL 1.1 |
 | assets/fonts/ibm-plex-sans/OFL.txt | IBM Corp. | Unmodified accompanying font licence | SIL OFL 1.1 |
 | assets/fonts/liberation-sans/OFL.txt | Red Hat, Inc.; Liberation Fonts contributors | Unmodified accompanying font licence | SIL OFL 1.1 |
-| assets/icons/app/linux/exports/hicolor/128x128/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/16x16/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/24x24/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/256x256/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/32x32/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/48x48/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/512x512/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/linux/exports/hicolor/64x64/apps/ai.storyteller.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
-| assets/icons/app/shared/source/app_icon.rs | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/128x128/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/16x16/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/24x24/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/256x256/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/32x32/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/48x48/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/512x512/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/linux/exports/hicolor/64x64/apps/io.tangencylabs.solidcraft.png | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
+| assets/icons/app/shared/source/app_icon.rs | SolidCraft contributors | Original SolidCraft drawing code: the borderless mark, drawn from the faces and gradients of assets/icons/app/macos/source/SolidCraft.icon/Assets/03-solid-blue-cutout.svg | MIT OR Apache-2.0 |
 | assets/icons/app/shared/source/windows_ico.rs | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
 | assets/icons/app/windows/exports/solidcraft-executable.ico | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
 | assets/icons/app/windows/exports/solidcraft.ico | SolidCraft contributors | Generated from assets/icons/app/shared/source/app_icon.rs with the original CLI/ICO encoders | MIT OR Apache-2.0 |
@@ -119,6 +147,7 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/locales/cs.json | potuzai | Czech translation of the English catalog, contributed upstream | MIT OR Apache-2.0 |
 | assets/locales/da.json | SolidCraft contributors | Original Danish translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
 | assets/locales/de.json | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
+| assets/locales/en-GB.json | SolidCraft contributors | English (UK): the English catalog's messages whose spelling differs, in UK spelling | MIT OR Apache-2.0 |
 | assets/locales/en.json | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
 | assets/locales/es.json | jawler | Spanish (Spain) translation of the English catalog, contributed upstream | MIT OR Apache-2.0 |
 | assets/locales/fr.json | rlartot | French translation of the English catalog, contributed upstream | MIT OR Apache-2.0 |
@@ -129,6 +158,7 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/locales/ja.json | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
 | assets/locales/ko.json | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
 | assets/locales/ms.json | A.Hakim (a-hakim) | Malay translation of the English message catalog | MIT OR Apache-2.0 |
+| assets/locales/nb.json | SolidCraft contributors | Original Norwegian Bokmål translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
 | assets/locales/nl.json | SolidCraft contributors | Original Dutch translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
 | assets/locales/pl.json | cyryllo | Polish translation of the English catalog, contributed upstream | MIT OR Apache-2.0 |
 | assets/locales/ru.json | Alex Pro (del000) | Russian translation of the English catalog, contributed upstream | MIT OR Apache-2.0 |
@@ -141,9 +171,13 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/locales/zh.json | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
 | assets/locales/zh-TW.json | SolidCraft contributors | Original Traditional Chinese (Taiwan) translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
 | assets/materials/library.rs | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
-| assets/platforms/linux/ai.storyteller.solidcraft.desktop | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
-| assets/platforms/linux/ai.storyteller.solidcraft.metainfo.xml.in | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
-| assets/platforms/linux/ai.storyteller.solidcraft.mime.xml | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
+| assets/platforms/linux/io.tangencylabs.solidcraft.desktop | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
+| assets/platforms/linux/io.tangencylabs.solidcraft.metainfo.xml.in | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
+| assets/platforms/linux/io.tangencylabs.solidcraft.mime.xml | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
+| assets/platforms/macos/dmg/background.tiff | SolidCraft contributors | original disk image window background (blueprint sheet: grid, double border, circles, centre lines, leader arrow, title block) drawn by assets/platforms/macos/dmg/make_background.py in IBM Plex Sans/Mono; 1x and 2x representations | MIT OR Apache-2.0 |
+| assets/platforms/macos/dmg/make_background.py | SolidCraft contributors | authoring script that draws the disk image background (Pillow); not part of any build | MIT OR Apache-2.0 |
+| assets/platforms/macos/dmg/layout.json | SolidCraft contributors | disk image window size, icon size and icon positions shared by the background script and settings.py | MIT OR Apache-2.0 |
+| assets/platforms/macos/dmg/settings.py | SolidCraft contributors | dmgbuild settings (MIT, https://github.com/dmgbuild/dmgbuild) for the SolidCraft disk image; original settings, no dmgbuild code copied | MIT OR Apache-2.0 |
 | assets/platforms/macos/Info.plist.in | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
 | assets/platforms/macos/README.txt | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
 | assets/platforms/windows/solidcraft.en-us.wxl | PhotoCraft / SolidCraft contributors | PhotoCraft packaging templates (https://github.com/storytold/photocraft), adapted for SolidCraft | Apache-2.0 |
@@ -156,6 +190,22 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/styles/ui/themes/gruvbox-light.json | SolidCraft contributors | original SolidCraft theme file mapping SolidCraft's UI colours to the Gruvbox palette's colour values (Gruvbox by Pavel Pertsev, https://github.com/morhetz/gruvbox, MIT) | MIT OR Apache-2.0 |
 | assets/styles/ui/themes/gruvbox-light-hard.json | SolidCraft contributors | original SolidCraft theme file mapping SolidCraft's UI colours to the Gruvbox palette's colour values (Gruvbox by Pavel Pertsev, https://github.com/morhetz/gruvbox, MIT) | MIT OR Apache-2.0 |
 | assets/styles/ui/themes/gruvbox-light-soft.json | SolidCraft contributors | original SolidCraft theme file mapping SolidCraft's UI colours to the Gruvbox palette's colour values (Gruvbox by Pavel Pertsev, https://github.com/morhetz/gruvbox, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/solidcraft-95.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/platinum-9.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/cupertino.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/green-phosphor.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/amber-phosphor.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/blueprint.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/one-dark.json | SolidCraft contributors | original SolidCraft theme file with colours adapted from the One Dark palette (Atom One Dark by GitHub Atom, https://github.com/atom/atom, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/tokyo-night.json | SolidCraft contributors | original SolidCraft theme file adapting the colours of a published palette (Tokyo Night by enkia, https://github.com/enkia/tokyo-night-vscode-theme, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/solarized-light.json | SolidCraft contributors | original SolidCraft theme file adapting the colours of a published palette (Solarized by Ethan Schoonover, https://github.com/altercation/solarized, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/nord.json | SolidCraft contributors | original SolidCraft theme file adapting the colours of a published palette (Nord by Sven Greb and the Nord contributors, https://github.com/nordtheme/nord, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/high-contrast.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/graphite.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/nosferatu.json | SolidCraft contributors | original SolidCraft theme file adapting the colours of a published palette (Dracula by Zeno Rocha and the Dracula Theme contributors, https://github.com/dracula/dracula-theme, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/catppuccin-mocha.json | SolidCraft contributors | original SolidCraft theme file adapting the colours of a published palette (Catppuccin by the Catppuccin organisation, https://github.com/catppuccin/catppuccin, MIT) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/okibi.json | SolidCraft contributors (Kai Evans) | original SolidCraft theme file mapping SolidCraft's UI colours to the Okibi palette (dark) of the Okibi design system by Kai Evans (https://kaievns.github.io/okibi-akiri-design-system-spec/) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/akari.json | SolidCraft contributors (Kai Evans) | original SolidCraft theme file mapping SolidCraft's UI colours to the Akari palette (light) of the Okibi design system by Kai Evans (https://kaievns.github.io/okibi-akiri-design-system-spec/) | MIT OR Apache-2.0 |
 | assets/styles/web/loading-logo.svg | SolidCraft contributors | Animation of the SolidCraft mark, built from the paths and gradients of assets/icons/app/macos/source/SolidCraft.icon/Assets/03-solid-blue-cutout.svg; original animation | MIT OR Apache-2.0 |
 | assets/styles/web/loading.css | SolidCraft contributors | Original SolidCraft resource data or drawing code, collected without redesign | MIT OR Apache-2.0 |
 | crates/io/src/native_cad/fixtures/block.FCStd | SolidCraft contributors | original 10 × 20 × 30 mm test box saved by FreeCAD 1.1.4 run as an external program (`make_block_fcstd.py` beside it); no third-party geometry | MIT OR Apache-2.0 |
@@ -182,6 +232,11 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/icons/ui/design/svg/flat/redo.svg | SolidCraft contributors | single-colour application/navigation icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/save.svg | SolidCraft contributors | single-colour application/navigation icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/settings.svg | SolidCraft contributors | single-colour application/navigation icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/settings_keyboard.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/settings_monitor.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/settings_mouse.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/settings_palette.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/settings_plug.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/spin.svg | SolidCraft contributors | single-colour application/navigation icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/style.svg | SolidCraft contributors | single-colour application/navigation icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/undo.svg | SolidCraft contributors | single-colour application/navigation icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
@@ -233,8 +288,57 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/icons/ui/design/svg/model/circle_tt.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/circle_ttt.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/coil.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/colored_components.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/colored_components_off.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/combine.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/component.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
+
+### Render workspace icon drafts
+
+Original SolidCraft drawings, Open for owner review; no runtime assignments.
+
+| File | Author | Source | Licence |
+|---|---|---|---|
+| assets/icons/ui/design/svg/model/render_all_shots.svg | SolidCraft contributors | original Camera icon master (64 grid): stacked camera bodies with a lower-right play badge | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_appearance.svg | SolidCraft contributors | original Looks icon master (64 grid): shaded look sphere on the top corner of an accent-shaded cube | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_aspect_frame.svg | SolidCraft contributors | original Camera icon master (64 grid): wide rounded frame with two opposite corner brackets | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_backdrop.svg | SolidCraft contributors | original Studio icon master (64 grid): grey cube in front of a tall upright accent panel | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_cancel.svg | SolidCraft contributors | original Output icon master (64 grid): picture with a lower-right round stop badge | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_check.svg | SolidCraft contributors | original Output icon master (64 grid): picture with a lower-right round check badge | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_compare.svg | SolidCraft contributors | original Output icon master (64 grid): two grey pictures split by a vertical slider with opposed arrows | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_copy_look.svg | SolidCraft contributors | original Looks icon master (64 grid): look sphere in a square frame offset from a second frame outline | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_execute.svg | SolidCraft contributors | original Output icon master (64 grid): picture with a lower-right round play badge | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_export_image.svg | SolidCraft contributors | original Output icon master (64 grid): picture with a large outward diagonal arrow at the upper right | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_exposure.svg | SolidCraft contributors | original Camera icon master (64 grid): split light and accent disc with plus and minus marks | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_fit_product.svg | SolidCraft contributors | original Camera icon master (64 grid): grey cube inside four corner brackets | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_frame_guides.svg | SolidCraft contributors | original Camera icon master (64 grid): rounded frame with a rule-of-thirds grid and four accent nodes | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_from_material.svg | SolidCraft contributors | original Looks icon master (64 grid): look sphere struck through above a plain grey slab | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_ground.svg | SolidCraft contributors | original Studio icon master (64 grid): grey cube on a slab with an accent contact patch | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_lens.svg | SolidCraft contributors | original Camera icon master (64 grid): concentric lens rings around an accent centre | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_library.svg | SolidCraft contributors | original Studio icon master (64 grid): row of three look spheres, middle one accent, on a shelf bar | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_light_area.svg | SolidCraft contributors | original Lights icon master (64 grid): slanted flat panel above a dotted accent stem | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_light_by_highlight.svg | SolidCraft contributors | original Lights icon master (64 grid): shaded sphere with a ringed highlight target and dotted stem arriving from above | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_light_point.svg | SolidCraft contributors | original Lights icon master (64 grid): round source disc with centre dot above a dotted accent stem | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_light_spot.svg | SolidCraft contributors | original Lights icon master (64 grid): cone source with curved rim above a dotted accent stem | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_lighting_presets.svg | SolidCraft contributors | original Studio icon master (64 grid): two stacked cards, the front one holding a light bulb | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_output_size.svg | SolidCraft contributors | original Output icon master (64 grid): picture frame with a diagonal double-headed dimension arrow | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_paint.svg | SolidCraft contributors | original Looks icon master (64 grid): flat brush with an accent tip, light ferrule and slate handle | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_pick_up.svg | SolidCraft contributors | original Looks icon master (64 grid): eyedropper with a grey bulb, slate crossbar and accent sampling tip | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_quality.svg | SolidCraft contributors | original Output icon master (64 grid): three rising bars, the tallest in accent | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_replace_all.svg | SolidCraft contributors | original Looks icon master (64 grid): grey sample sphere with an arrow to an accent sphere beside a second one | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_results.svg | SolidCraft contributors | original Output icon master (64 grid): stack of two pictures, the front one showing a landscape | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_same_look.svg | SolidCraft contributors | original Looks icon master (64 grid): look sphere and three cubes, the two matching cubes ringed | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_shot.svg | SolidCraft contributors | original Camera icon master (64 grid): camera body with a lower-right plus badge | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_shots_strip.svg | SolidCraft contributors | original Camera icon master (64 grid): strip of three small frames, the middle one in accent | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_solo_light.svg | SolidCraft contributors | original Lights icon master (64 grid): point source and dotted stem inside four corner focus brackets | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_sun.svg | SolidCraft contributors | original Lights icon master (64 grid): source disc with eight short radial rays | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_transparent_background.svg | SolidCraft contributors | original Output icon master (64 grid): grey cube on a checker tile | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_update_shot.svg | SolidCraft contributors | original Camera icon master (64 grid): camera body with a lower-right refresh badge | MIT OR Apache-2.0 |
+
+### UI icon masters (continued)
+
+| File | Author | Source | Licence |
+|---|---|---|---|
 | assets/icons/ui/design/svg/model/compute.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/configuration_table.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/conic.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
@@ -319,6 +423,26 @@ Editable drawing code, native projects and shipped exports are collected under `
 | assets/icons/ui/design/svg/model/offset_symmetric.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/import_tray.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/flat/export_tray.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/send.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/stop.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/shield.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/status_recovery.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/frame_member.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/render_environment.svg | SolidCraft contributors | original Studio icon master (64 grid): dome with a grey cube inside | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/style_shaded.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/style_wireframe.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/style_hidden_edges.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/style_translucent.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/select_faces_edges.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/select_bodies.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/select_features.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/select_parts.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/select_components.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/select_sketch.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/display.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/grid.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/ground_shadow.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/ambient_occlusion.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/placeholder.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/plane.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
 | assets/icons/ui/design/svg/model/plane_angle.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
@@ -460,6 +584,50 @@ Editable drawing code, native projects and shipped exports are collected under `

 | docs/book/src/og.png | SolidCraft contributors | copy of assets/branding/web/source/og.png staged by cargo xtask book (gitignored) | MIT OR Apache-2.0 |
 | docs/sponsors/blacksmith-ci-powered.png | Blacksmith (blacksmith.sh) | "CI powered by Blacksmith" sponsor banner supplied by Blacksmith for the sponsorship credit; used only to credit the sponsor, not part of the application | © Blacksmith, used with permission |
+| assets/icons/ui/design/svg/model/path_flange.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| docs/book/src/generated/hem.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/hem.json`; gitignored), original sheet metal demonstration | MIT OR Apache-2.0 |
+| docs/book/scripts/hem.json | SolidCraft contributors | original parametric recipe for an 80 × 50 mm sheet with an 8 mm returned edge, authored for the command guide | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/clay.json | SolidCraft contributors | original SolidCraft theme file (Clay, light): warm paper palette chosen for SolidCraft | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/clay-dark.json | SolidCraft contributors | original SolidCraft theme file (Clay Dark): warm charcoal palette chosen for SolidCraft | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/cone.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/locales/ar.json | Abdullah (A-AL-ANAZI) | Original Arabic translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
+| assets/locales/he.json | SolidCraft contributors | Original Hebrew translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/cga.json | SolidCraft contributors | original SolidCraft theme file using the 16 colours of the IBM Color Graphics Adapter (black, cyan, magenta, and white of its high-intensity palette 1 for the interface) | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/1-bit.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| assets/styles/ui/themes/1-bit-dark.json | SolidCraft contributors | original SolidCraft theme file | MIT OR Apache-2.0 |
+| `assets/locales/pending/navbar-customisation.json` | SolidCraft contributors | Original navigation bar editor translations | MIT OR Apache-2.0 |
+| `assets/locales/pending/navbar-slots.json` | SolidCraft contributors | Original navigation slot translations | MIT OR Apache-2.0 |
+| assets/locales/bs.json | Tarik Sijercic (tsijercic1) | Original Bosnian translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
+| assets/locales/hr.json | Tarik Sijercic (tsijercic1) | Original Croatian translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
+| assets/locales/sr.json | Tarik Sijercic (tsijercic1) | Original Serbian (ekavian, Cyrillic) translation of SolidCraft's English catalog; no commercial CAD text used | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/finish_edit.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| `assets/locales/pending/sketch-tracking-guides.json` | SolidCraft contributors | Original alignment-guide preference labels and help text | MIT OR Apache-2.0 |
+| assets/locales/pending/point-clouds.json | SolidCraft contributors | Original point-cloud UI strings and translations | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/feature_group.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/mesh_body.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/timeline_play.svg | SolidCraft contributors | Original history playback icon; canonical grey_cube base and original action cue | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/timeline_stop.svg | SolidCraft contributors | Original history playback icon; canonical grey_cube base and original action cue | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/flat/status_pin.svg | SolidCraft contributors | Original analytic pin icon for persistent viewport results | MIT OR Apache-2.0 |
+| assets/locales/pending/render-wear.json | SolidCraft contributors | Original UI labels and translations | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/equation_curve.svg | SolidCraft contributors | two-tone modelling icon master (64 grid), original SolidCraft artwork | MIT OR Apache-2.0 |
+| assets/locales/pending/sketch-recent-snap.json | SolidCraft contributors | Original preference messages for the recent centre and midpoint snap | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_horizontal.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_vertical.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_angle.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_parallel.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_perpendicular.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_tangent_external.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_tangent_at.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_tangent_two.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| assets/icons/ui/design/svg/model/construction_line_bisector.svg | SolidCraft contributors | original icon master (64 grid) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-circle.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-circle.json`; gitignored) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-flower.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-flower.json`; gitignored) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-involute.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-involute.json`; gitignored) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-line.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-line.json`; gitignored) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-parabola.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-parabola.json`; gitignored) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-spiral.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-spiral.json`; gitignored) | MIT OR Apache-2.0 |
+| docs/book/src/generated/equation-wave.png | SolidCraft contributors | rendered by `cargo xtask book` (`solidcraft-cli snapshot docs/book/scripts/equation-wave.json`; gitignored) | MIT OR Apache-2.0 |

 ## Code adapted from sibling projects

@@ -502,9 +670,9 @@ crates/engine/src/tests/gltf_import.rs); no third-party models are committed.
 ## FreeCAD and Rhino import library

 FreeCAD `.FCStd` and Rhino `.3dm` files are read with [cadmpeg](https://github.com/cadmpeg/cadmpeg)
-0.6.1 (Apache-2.0), linked as the crates `cadmpeg-core`, `cadmpeg-ir`, `cadmpeg-registry`,
+0.6.3 (Apache-2.0), linked as the crates `cadmpeg-core`, `cadmpeg-ir`, `cadmpeg-registry`,
 `cadmpeg-container`, `cadmpeg-codec-freecad`, `cadmpeg-codec-rhino` and `cadmpeg-codec-step`
-in native builds (`crates/io/src/native_cad.rs`). Only those open-format codecs are built: no
+in native and browser builds (`crates/io/src/native_cad.rs`). Only those open-format codecs are built: no
 default features, so cadmpeg's codecs for commercial CAD formats and its ShapeManager/ACIS
 codec are not compiled in. Its licence text is in THIRD-PARTY-LICENSES.txt; no code from it is
 copied into SolidCraft.
@@ -537,3 +705,453 @@ A frame whose meshes the GPU refuses to stage (device lost or out of memory) is
 skipped with a warning instead of panicking (#1469).
 Paint callbacks are prepared only after a drawable is acquired, so a skipped
 surface frame cannot strand cached meshes without their GPU initialization.
+
+## Runtime studio lighting mathematics
+
+`crates/gpu/src/path/path.wgsl` implements the power-heuristic estimator from the
+mathematical description in [PBRT fourth edition, section 13.4](https://pbr-book.org/4ed/Light_Transport_I_Surface_Reflection/A_Better_Path_Tracer).
+No PBRT code or assets were copied. `crates/render/src/job/lighting.rs` evaluates
+[Krzysztof Narkowicz's published 2016 ACES rational fit](https://knarkowicz.wordpress.com/2016/01/06/aces-filmic-tone-mapping-curve/)
+using its published coefficients (author licenses the fit under CC0/MIT).
+These original implementations are under SolidCraft's MIT OR Apache-2.0 licence.
+
+## Original coffee framing variant
+
+| File | Author | Provenance | Licence |
+|---|---|---|---|
+| examples/studio/author_coffee_framing.py | SolidCraft contributors | original editable composition, camera and documentation; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-framing.json | SolidCraft contributors | original editable composition, camera and documentation; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-framing-sweep.json | SolidCraft contributors | original editable composition, camera and documentation; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-framing-render.json | SolidCraft contributors | original editable composition, camera and documentation; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-framing.md | SolidCraft contributors | original editable composition, camera and documentation; no external assets | MIT OR Apache-2.0 |
+
+## Original cylindrical coffee housing variant
+
+| File | Author | Provenance | Licence |
+|---|---|---|---|
+| examples/studio/author_coffee_cylinder.py | SolidCraft contributors | original parametric cylindrical CAD construction and editable command recipes; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-cylinder.json | SolidCraft contributors | original cylindrical housing on the original exploded coffee composition; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-cylinder-sweep.json | SolidCraft contributors | original cylindrical housing and continuous CAD cyclorama; no external assets | MIT OR Apache-2.0 |
+| examples/studio/coffee-cylinder-render.json | SolidCraft contributors | original camera, studio lighting and optical settings retained from the framing variant | MIT OR Apache-2.0 |
+| examples/studio/coffee-cylinder.md | SolidCraft contributors | original dimensional recipe, provenance and validation limitations | MIT OR Apache-2.0 |
+
+## Runtime environment sampling
+
+`crates/render/src/lighting/environment.rs` and the environment/sun portions of
+`crates/gpu/src/path/path.wgsl` are original SolidCraft implementations of
+solid-angle importance sampling and MIS, informed by the mathematical description
+in [PBRT fourth edition, sections 12.5](https://pbr-book.org/4ed/Light_Sources/Infinite_Area_Lights)
+and [13.4](https://pbr-book.org/4ed/Light_Transport_I_Surface_Reflection/A_Better_Path_Tracer).
+The procedural gradient and inline RGBE test fixtures are original mathematical
+colours, not downloaded imagery. No third-party environment images or shader code
+are included. Licence: MIT OR Apache-2.0.
+
+## Original tumbler showcase assets
+
+The CAD room, tumblers, window opening, wood/weave patterns and RGBE sky below
+are original SolidCraft contributor work. No third-party scene, photograph, HDRI,
+texture, or AI-generated artwork was used. Python authoring sources are included.
+All listed files use the repository MIT OR Apache-2.0 licence.
+
+| File | Source / author | Use | License |
+| --- | --- | --- | --- |
+| examples/studio/author_showcase.py | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/author_tumblers.py | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/textures/ATTRIBUTION.md | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/textures/author_textures.py | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/textures/environment-manifest.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/textures/manifest.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-hdr-textures-blocked-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-hdr-textures-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-materials.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-sun-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-sun-textures-blocked-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-sun-textures-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-sun.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-textures-blocked-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers-textures-render.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+| examples/studio/tumblers.json | Original SolidCraft contributors | Editable scene / runtime resource / reproducible authoring metadata | MIT OR Apache-2.0 |
+
+The original studio generators produce local ignored PNG maps and an RGBE gradient.
+Generated image bytes are not source assets; their authorship, licences and expected
+hashes are documented under `examples/studio/textures`. Rendered evidence belongs
+on the results branch. No photographs, scans or external image assets are included.
+
+## Additional render and showcase resources
+
+| File | Author | Source | Licence |
+|---|---|---|---|
+| assets/render/starter/tools/check_all.py | SolidCraft contributors | original read-only authored/native resource validation orchestration and evidence receipts | MIT OR Apache-2.0 |
+| assets/render/starter/tools/test_check_all.py | SolidCraft contributors | original validation-runner regression fixtures and subprocess tests | MIT OR Apache-2.0 |
+| assets/render/starter/tools/requirements.txt | SolidCraft contributors | pinned offline authoring tool requirements; no application dependency changes | MIT OR Apache-2.0 |
+| crates/render/examples/validate_starter.rs | SolidCraft contributors | original native resource conformance checker using public SolidCraft decoding, normalization, sampling and mip APIs | MIT OR Apache-2.0 |
+| .gitattributes | SolidCraft contributors | original canonical line-ending policy for the existing runtime icon-discovery manifest; no artwork or icon-assignment changes | MIT OR Apache-2.0 |
+| assets/render/.gitattributes | SolidCraft contributors | original canonical line-ending policy for SHA-256-pinned renderer authoring resources | MIT OR Apache-2.0 |
+| docs/render-materials/.gitattributes | SolidCraft contributors | original canonical line-ending policy for SHA-256-pinned renderer authoring resources | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/assembly-bench-soft.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/automotive-turntable.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/black-metal-strips.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/cnc-overhead.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/esd-bench-neutral.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/fdm-neutral-inspection.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/garage-door.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/hangar-skylight.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/home-workbench.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/makerspace-worklights.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/mechanical-bay.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/neutral-comparison.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/neutral-side-softbox.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/paint-inspection-bands.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/printed-part-photo.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/rework-offset-strips.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/robot-led-editorial.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/showroom-ribbons.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/spacecraft-clean-bay.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/sun-free-overcast.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/vacuum-black.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/warm-table-window.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/white-enveloping-studio.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/exports/woodshop-window.hdr | SolidCraft contributors | original analytic relative-radiance HDR export; recipe, linear-sRGB primaries and SHA-256 in assets/render/starter/environments/manifest.json; not measured photometry | MIT OR Apache-2.0 |
+| assets/render/starter/environments/manifest.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/environments/source/recipes.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/lighting/exports/rigs.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/lighting/recipe.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-001/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-001/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-001/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-001/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-001/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-002/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-002/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-002/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-002/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-002/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-003/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-003/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-003/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-003/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-003/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-004/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-004/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-004/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-004/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-004/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-005/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-005/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-005/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-005/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-005/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-006/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-006/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-006/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-006/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-006/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-007/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-007/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-007/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-007/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-007/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-008/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-008/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-008/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-008/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-008/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-009/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-009/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-009/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-009/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-009/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-010/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-010/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-010/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-010/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-010/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-011/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-011/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-011/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-011/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-011/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-012/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-012/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-012/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-012/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-012/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-013/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-013/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-013/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-013/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-013/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-014/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-014/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-014/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-014/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-014/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-015/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-015/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-015/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-015/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-015/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-016/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-016/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-016/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-016/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-016/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-017/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-017/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-017/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-017/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-017/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-018/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-018/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-018/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-018/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-018/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-019/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-019/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-019/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-019/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-019/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-020/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-020/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-020/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-020/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-020/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-021/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-021/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-021/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-021/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-021/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-022/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-022/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-022/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-022/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-022/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-023/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-023/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-023/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-023/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-023/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-024/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-024/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-024/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-024/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-024/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-025/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-025/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-025/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-025/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-025/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-026/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-026/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-026/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-026/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-026/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-027/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-027/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-027/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-027/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-027/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-028/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-028/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-028/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-028/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-028/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-029/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-029/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-029/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-029/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-029/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-030/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-030/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-030/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-030/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-030/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-031/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-031/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-031/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-031/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-031/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-032/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-032/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-032/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-032/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-032/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-033/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-033/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-033/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-033/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-033/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-034/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-034/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-034/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-034/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-034/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-035/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-035/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-035/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-035/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-035/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-036/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-036/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-036/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-036/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-036/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-037/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-037/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-037/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-037/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-037/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-038/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-038/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-038/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-038/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-038/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-039/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-039/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-039/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-039/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-039/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-040/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-040/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-040/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-040/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-040/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-041/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-041/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-041/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-041/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-041/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-042/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-042/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-042/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-042/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-042/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-043/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-043/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-043/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-043/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-043/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-044/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-044/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-044/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-044/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-044/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-045/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-045/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-045/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-045/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-045/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-046/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-046/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-046/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-046/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-046/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-047/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-047/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-047/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-047/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-047/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-048/base_color.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-048/height.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-048/metallic.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-048/normal_open_gl.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/exports/SURF-048/roughness.png | SolidCraft contributors | original deterministic periodic PBR map export; recipe, role, scale and SHA-256 in assets/render/starter/materials/manifest.json; not measured material data | MIT OR Apache-2.0 |
+| assets/render/starter/materials/manifest.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/materials/source/recipes.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/pack.json | SolidCraft contributors | original clean-room renderer resource recipe or manifest; authored/unbound scope and source receipts in assets/render/starter/README.md | MIT OR Apache-2.0 |
+| assets/render/starter/tools/environments.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/starter/tools/lighting.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/starter/tools/materials.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/starter/tools/test_environments.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/starter/tools/test_lighting.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/starter/tools/test_materials.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/starter/tools/validate_pack.py | SolidCraft contributors | original clean-room offline resource authoring, numerical verification or validation tool; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/selene/licenses/UFL.txt | Canonical Ltd. | exact Ubuntu Font Licence 1.0 notice retained from https://github.com/0xlillith/solidcraft-rover/blob/b32437915372d32b71419dc8f5143fe22ff1e869/UFL.txt for the modelled Ubuntu Light lettering | Ubuntu Font Licence 1.0 |
+| assets/render/selene/materials/appearance-pack.json | SolidCraft contributors | original clean-room English appearance authoring data: 48 illustrative opaque PBR projections with separate advanced target specifications; no measured dataset or external assets | MIT OR Apache-2.0 |
+| assets/render/selene/materials/appearance-swatches.json | SolidCraft contributors | original analytic command script for 48 opaque box swatches and a support base, derived only from the adjacent original appearance pack; no external artwork or engineering properties | MIT OR Apache-2.0 |
+| assets/render/selene/models/SELENE-functional.solidcraft | SolidCraft contributors (native enhancements); 0xlillith (original rover); SychPL / Mateusz Sych (supplied showcase assembly); Canonical Ltd. (lettering outlines) | native-command derivative of the unchanged author-supplied source, with original bearing, suspension, gripper, electronics and presentation work; source and final hashes in assets/render/selene/SOURCE.md and VALIDATION.md | Model and showcase contributions: MIT OR Apache-2.0 (explicit SychPL grant https://github.com/tangency-labs/solidcraft/pull/5494#issuecomment-6375788360); lettering: Ubuntu Font Licence 1.0, notice retained in assets/render/selene/licenses/UFL.txt |
+| assets/render/selene/motion/interference-pairs.json | SolidCraft contributors | original authored exact-body pair selection for bounded native clearance checks on the functional SELENE derivative; not a generated collision result | MIT OR Apache-2.0 |
+| assets/render/selene/motion/mechanism-acceptance.json | SolidCraft contributors | original kinematic acceptance criteria, inspected source-container bindings and analytic planning checks from cited public SolidCraft documentation and the admitted native source; derivative runtime acceptance is recorded separately | MIT OR Apache-2.0 |
+| assets/render/selene/motion/preflight-commands.json | SolidCraft contributors | original read-only inventory script using existing project commands; no source-model selectors or state mutations | MIT OR Apache-2.0 |
+| assets/render/selene/motion/sample-sequence.json | SolidCraft contributors | original future lunar sampling and sealed-vial dynamics state specification; no simulation or physical calibration result | MIT OR Apache-2.0 |
+| assets/render/selene/scenes/roles.json | SolidCraft contributors | original semantic role and candidate-material authoring specification for the prepared SELENE demo; no native geometry or external assets bundled | MIT OR Apache-2.0 |
+| assets/render/selene/scenes/shots.json | SolidCraft contributors | original shot, framing and staged-sequence authoring specification for the prepared SELENE demo; no render or simulation result claimed | MIT OR Apache-2.0 |
+| assets/render/selene/scenes/stages.json | SolidCraft contributors | original stage composition and light-ownership authoring specification derived from the project render catalog; scientific context linked in scenes/README.md | MIT OR Apache-2.0 |
+| assets/render/selene/source-lock.json | SolidCraft contributors | original source-admission metadata and public-reference inventory pinning the supplied improved SELENE native file; original-model and font notices preserved in SOURCE.md | MIT OR Apache-2.0 |
+| assets/render/selene/source/SELENE-showcase.solidcraft | 0xlillith (original rover); SychPL / Mateusz Sych (showcase assembly and helpers); SolidCraft contributors (emblem); Canonical Ltd. (lettering outlines) | unchanged author-published native file from https://github.com/SychPL/solidcraft/blob/32ec1720447e3fcc6bb6cc53a63fb5b39cfa21b9/SELENE-showcase.solidcraft; source hash and license evidence in assets/render/selene/SOURCE.md | Model and showcase contributions: MIT OR Apache-2.0 (explicit SychPL grant https://github.com/tangency-labs/solidcraft/pull/5494#issuecomment-6375788360); lettering: Ubuntu Font Licence 1.0, notice retained in assets/render/selene/licenses/UFL.txt |
+| assets/render/selene/tools/bearings.py | SolidCraft contributors | original native-command authoring of grooved bearings, rolling-element kinematics, clamp hubs and arm/head clearances; analytic geometry, no copied CAD source | MIT OR Apache-2.0 |
+| assets/render/selene/tools/build.py | SolidCraft contributors | original Python development tool for pinned-source native command replay, staged checkpoints, command-trace and geometry health checks; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/selene/tools/electronics.py | SolidCraft contributors | original native-command Raspberry Pi 5 visual reconstruction using public manufacturer mechanical dimensions; original package envelopes and connector internals, no manufacturer CAD or artwork copied | MIT OR Apache-2.0 |
+| assets/render/selene/tools/export_views.py | SolidCraft contributors | original native MCP preview export tool for three reusable showcase views; changes only transient visibility and cameras and verifies the source master hash | MIT OR Apache-2.0 |
+| assets/render/selene/tools/finishes.py | SolidCraft contributors | original native physical-material proxy and opaque PBR assignment generator preserving the supplied rover palette | MIT OR Apache-2.0 |
+| assets/render/selene/tools/mechanisms.py | SolidCraft contributors | original native-command gripper sleeves, pads, wheel ownership, joint limits and inspection studies with independent analytic suspension relation | MIT OR Apache-2.0 |
+| assets/render/selene/tools/prepare.py | SolidCraft contributors | original Python development tool for bounded native-container inspection and reviewed opaque body-assignment preparation; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/selene/tools/presentation.py | SolidCraft contributors | original native-command browser organization, camera/render setups and closed sample-vial glass preparation | MIT OR Apache-2.0 |
+| assets/render/selene/tools/suspension.py | SolidCraft contributors | original native-command trailing-arm suspension, telescoping coilover loops, plain bushings, carrier gussets and local motion clearances derived from the admitted rover geometry; independent analytic pin-distance relation, no copied external CAD | MIT OR Apache-2.0 |
+| assets/render/selene/tools/validate_native.py | SolidCraft contributors | original bounded native MCP verification tool for sampled SELENE kinematics, independent analytic follower and world-coordinate checks, optional exact-name interference pairs and unchanged input hashes; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/selene/tools/validate_prepared.py | SolidCraft contributors | original Python development validator for prepared SELENE resources, source status, references, hashes and command projections; no application runtime dependency | MIT OR Apache-2.0 |
+| assets/render/selene/tools/yaw_supports.py | SolidCraft contributors | original native-command plain yaw journals, flanged brass thrust bushings, recessed axial retaining pins and mounting-head clearances derived from the admitted rover geometry; no copied external CAD | MIT OR Apache-2.0 |
+| assets/render/selene/ui/demo-flow.json | SolidCraft contributors | original progressive-disclosure UI integration specification for the existing Render workspace; no copied UI artwork or runtime registration | MIT OR Apache-2.0 |
+| docs/render-materials/baseline-setup-commands.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/capabilities.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/environment-presets.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/environments.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/lighting.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/lunar-physics-fixtures.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/materials.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/provenance.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/quality-presets.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/roadmap.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/scene-presets.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/selene-bindings.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/simulation-requirements.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/studio-presets.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/ui-integration.json | SolidCraft contributors | original English UI integration specification and exact source-revision mappings from SolidCraft's own implemented shell, UI kit and accepted icons; no copied artwork or runtime registration | MIT OR Apache-2.0 |
+| docs/render-materials/ux.json | SolidCraft contributors | original clean-room English catalog, preset or analytic planning data; external references documented in docs/render-materials/SOURCES.md; no external assets bundled | MIT OR Apache-2.0 |
+| docs/render-materials/validate_catalog.py | SolidCraft contributors | original Python development validator for catalog references, preset composition and analytic specification fixtures; no application runtime dependency | MIT OR Apache-2.0 |
+
+### Built-in render resource adapters (personal integration batch, 2026-10-22)
+
+The original adapters in `crates/engine/src/cmd/render/library.rs`, the generated lookup `library_data.rs` and its generator `tools/render-library/generate.py` project the already attributed starter and SELENE resources without replacing their bytes or authoring manifests. The added scalar texture channels, explicit color/V conventions and immutable-source/GPU-payload sharing are original contributor work under MIT OR Apache-2.0. No external code, commercial CAD data or new third-party imagery was imported. Source metadata and the original authoring attribution remain authoritative; pending runtime acceptance is not a photometric or engineering qualification.
+
+## Physical reference resource additions
+
+| File | Author | Source | Licence |
+|---|---|---|---|
+| assets/render/physical/bindings.json | SolidCraft contributors | original physical-reference curation, associations or derived schema-1 export; per-fact public sources retained without relicensing their publications | MIT OR Apache-2.0 |
+| assets/render/physical/exports/coverage.json | SolidCraft contributors | original physical-reference curation, associations or derived schema-1 export; per-fact public sources retained without relicensing their publications | MIT OR Apache-2.0 |
+| assets/render/physical/exports/native-cards.json | SolidCraft contributors | original physical-reference curation, associations or derived schema-1 export; per-fact public sources retained without relicensing their publications | MIT OR Apache-2.0 |
+| assets/render/physical/profiles.json | SolidCraft contributors | original physical-reference curation, associations or derived schema-1 export; per-fact public sources retained without relicensing their publications | MIT OR Apache-2.0 |
+| assets/render/physical/quantities.json | SolidCraft contributors | original physical-reference curation, associations or derived schema-1 export; per-fact public sources retained without relicensing their publications | MIT OR Apache-2.0 |
+| assets/render/physical/sources.json | SolidCraft contributors | original physical-reference curation, associations or derived schema-1 export; per-fact public sources retained without relicensing their publications | MIT OR Apache-2.0 |
+| assets/render/physical/tools/check_physical.py | SolidCraft contributors | original offline physical-reference validation and projection tool | MIT OR Apache-2.0 |
+| assets/render/physical/tools/physical.py | SolidCraft contributors | original offline physical-reference validation and projection tool | MIT OR Apache-2.0 |
+| assets/render/physical/tools/test_physical.py | SolidCraft contributors | original offline physical-reference validation and projection tool | MIT OR Apache-2.0 |
+| assets/render/physical/tools/export_library.py | SolidCraft contributors | original explicit reference-library planner and native no-loss export verifier; no external code | MIT OR Apache-2.0 |
+| assets/render/physical/tools/test_export_library.py | SolidCraft contributors | original regressions for native capability refusal, source identity and physical-card preservation | MIT OR Apache-2.0 |
+
+| tools/render-library/selene_studio.py | SolidCraft contributors | original bounded native MCP studio orchestration with pinned editable master, explicit GPU policy and request/export receipts; no generated model or image substitutes | MIT OR Apache-2.0 |
+
+| tools/render-library/selene_recipe.py | SolidCraft contributors | original full-detail SELENE material/light composition and analytic camera fit; unchanged pinned native master, no external imagery or measured optical dataset | MIT OR Apache-2.0 |
+| tools/render-library/test_selene_recipe.py | SolidCraft contributors | original independent projection, scaling, nonmutation and input-refusal fixtures for the SELENE studio recipe | MIT OR Apache-2.0 |
+
+| assets/render/selene/scenes/studio-hero.json | SolidCraft contributors | original executable render intent and verified provenance for the selected native SELENE studio showcase; authored RGB appearance and relative light units, not measured optics or simulation results | MIT OR Apache-2.0 |
+| tools/render-library/publish_selene.py | SolidCraft contributors | original bounded native-frame publication checks for explicit visual review, source identity, resource hashes, PNG CRCs and scanline limits; copies completed native bytes without image synthesis or resampling | MIT OR Apache-2.0 |
+| tools/render-library/test_publish_selene.py | SolidCraft contributors | original tiny analytic PNG fixtures for source-size, CRC, expansion, dimensions and explicit-publication-consent regressions | MIT OR Apache-2.0 |
+
+| tools/render-library/package_selene.py | SolidCraft contributors | original byte-preserving packaging of the reviewed native SELENE PNG, public provenance and checksums; bounded resource/PNG verification, no fonts, executables or new render execution | MIT OR Apache-2.0 |
+| .github/workflows/selene-showcase.yml | SolidCraft contributors | original read-only artifact-delivery workflow for the reviewed native SELENE export; existing pinned repository actions, no compilation, package installation, secret use or renderer claims | MIT OR Apache-2.0 |
+
+| tools/render-library/verify_linear_master.py | SolidCraft contributors | original independent validation driver for native linear EXR output using the official OpenEXR Python reader as an external test oracle; no codec implementation copied or production dependency added | MIT OR Apache-2.0 |
+
+## Aging, effects and backgrounds showcase, 2026-10-23
+
+| File | Author | Source | Licence |
+|---|---|---|---|
+| tools/render-showcase/instrument.py | SolidCraft contributors | original native-scene authoring, checksum-verified editorial assembly or bounded delivery tool; no third-party source or font binary copied | MIT OR Apache-2.0 |
+| tools/render-showcase/compose.py | SolidCraft contributors | original native-scene authoring, checksum-verified editorial assembly or bounded delivery tool; no third-party source or font binary copied | MIT OR Apache-2.0 |
+| tools/render-showcase/package.py | SolidCraft contributors | original native-scene authoring, checksum-verified editorial assembly or bounded delivery tool; no third-party source or font binary copied | MIT OR Apache-2.0 |
+
+| distribution/SolidCraft-Render-Showcase.zip | SolidCraft contributors and the explicitly credited original model/UI/resource authors | byte-verified selected collaborator package of reviewed native media, editable sample, recipes and public provenance; contained attribution and existing SELENE lettering notices retained; no fonts or executable binaries | MIT OR Apache-2.0 for new contributions; referenced original notices retained |
+| distribution/SolidCraft-Render-Showcase.json | SolidCraft contributors | original verified delivery archive manifest with exact SHA-256, member count and bounded scope | MIT OR Apache-2.0 |
@@ -1,8 +1,10 @@
 # Contributing to SolidCraft

+Agents: start from the router in [AGENTS.md](AGENTS.md), which points to a short skill in [`skills/`](skills/README.md) for each kind of work. This page stays the full human guide.
+
 SolidCraft is an open-source parametric 3D CAD app written in pure Rust.
 You sketch on a plane, constrain the sketch, turn profiles into solids, and
-change a parameter to watch the timeline rebuild. It runs as a desktop app (Windows, Linux), in
+change a parameter to watch the timeline rebuild. It runs as a desktop app (Windows, macOS, Linux), in
 the browser (wasm + WebGPU/WebGL2), headless from a CLI, and as an MCP server that AI agents can
 model with.

@@ -11,10 +13,19 @@ build it, how the code is laid out, the few rules that aren't negotiable, and wh
 needed most.

 Before choosing a task, check the [command inventory](docs/features.md) and
-[roadmap](ROADMAP.md) for implemented capabilities and current priorities.
+[roadmap](docs/roadmap-detail.md) for implemented capabilities and current priorities.

 Questions, ideas or want to say what you're working on? Join the [Discord](https://discord.gg/FtU4NQNVDH).

+## Kernel work is paused
+
+We're evaluating a new geometry kernel. Until that's decided, please don't open issues, pull
+requests or discussions about kernel work: booleans, fillets, chamfers, shell, offsets, sweeps and
+lofts, threads and holes, STEP/IGES import and export, tessellation, or anything else that changes
+`crates/kernel/`. The pinned issue on the tracker explains it. New ones get the `kernel-paused`
+label (`.github/workflows/kernel-paused.yml`) and a maintainer answers them. Crashes and data loss
+are still taken as issues, and everything outside the kernel carries on as normal.
+
 ## Get it running (about 10 minutes on a fast machine)

 You need stable Rust 1.95 or newer (required by egui/eframe 0.36). For the web
@@ -106,7 +117,8 @@ The [architecture page](docs/architecture.md) has the layer table. The short ver
   not.) Permissive
   dependencies are fine. Note which one you're adding and why in the PR. THIRD-PARTY-LICENSES.txt
   lists it once the change lands: the Generated files workflow rewrites it on `main`.
-   Nightly/manual CI also scans advisories, bans and sources with cargo-deny; see
+   Nightly/manual CI also scans advisories, bans and sources with cargo-deny, and a PR that
+   changes Cargo.lock or a Cargo.toml checks the advisories; see
   [the local command and coverage limits](docs/book/src/dev/testing.md#dependency-advisories).
 3. **Every asset is original or openly licensed and has a row in
   [ATTRIBUTION.md](ATTRIBUTION.md).** Icons are drawn in code (`crates/ui-egui/src/icons.rs`).
@@ -121,8 +133,11 @@ The [architecture page](docs/architecture.md) has the layer table. The short ver
   - Every call into truck goes through `solidcraft_kernel::guard`.
   - Every crash fix comes with a regression test.
 5. **Everything is a command, with a test.** A new feature means a `CommandSpec` in
-   `crates/engine/src/cmd/`, engine tests that measure the result (volume, area,
+   `crates/engine/src/cmd/` with input and output schemas (see
+   [Adding a command](docs/book/src/dev/commands.md#adding-a-command); a test warns about a
+   command without them, and will fail it once required), engine tests that measure the result (volume, area,
   face/edge/vertex counts against a value you can derive), and for UI work a scenario (below).
+   A command on the toolbar also ships with its help tooltip (step 6 of Adding a command).
 6. **One set of camera controls.** Every page or canvas that shows a view (the modelling
   viewport, the Render preview, and any new page such as a flat pattern or drawing) calls
   `navigation::handle` (`crates/ui-egui/src/navigation.rs`) for its camera input, with
@@ -177,8 +192,16 @@ no LTO, and debug assertions off (truck has debug-only assertions that reject va
 builds several times faster than `--release`. If a test fails only in a plain debug build, say so
 in the PR. `cargo xtask test` builds the tests with it and then runs every test binary at once
 (`cargo test` runs them one after another); arguments after `--` go to each binary, e.g.
-`cargo xtask test -- shell`. Tests run beside each other on a busy machine, so a test must not
-depend on wall-clock timing.
+`cargo xtask test -- shell`. Set `SOLIDCRAFT_TEST_JOBS` to a positive integer to opt into a
+shared bound on top-level test/side commands for `cargo xtask test` and `cargo xtask ci`.
+For example, `SOLIDCRAFT_TEST_JOBS=2` allows two commands at once; the sequential wasm/doc
+worker consumes one of those slots. Every binary and side check still runs after failures.
+Without the variable the existing concurrency is unchanged. With it set, each test binary
+inherits `RUST_TEST_THREADS` and `ACTION_MATRIX_JOBS` of `max(1, cpus / jobs)` — the machine's
+parallelism shared between the binaries in flight — unless you set either one explicitly;
+explicit caller overrides always win. Cargo's build-job setting remains an independent caller
+override; this limit does not change test filters, timeouts or baselines.
+Tests run beside each other on a busy machine, so a test must not depend on wall-clock timing.

 **Ready pull requests test what they touch.** CI maps changed files to workspace packages and
 runs Clippy, the test build and tests for those and their dependents. The
@@ -246,7 +269,9 @@ a conflict. `crates/doc/src/format/pending/README.md` has an example.

 **At release time** the maintainer runs `scripts/fold-format-pending.sh`, which moves the pending
 files into `crates/doc/src/format/v<N>/` and fixes that number for good (see
-[docs/releasing.md](docs/releasing.md)). Never add a file to a `v<N>/` folder afterwards.
+[docs/releasing.md](docs/releasing.md)). Never add a file to a `v<N>/` folder afterwards. Drawings
+follow the same rules with their own numbers, from 1, in `crates/doc/src/drawing/format/` (see its
+`pending/README.md`), and the same script folds them.

 ## Lists many changes add to

@@ -254,17 +279,36 @@ Some files gain an item in many pull requests at once. They are kept so that two
 each add an item only meet when their items are neighbours, which spares everyone a conflict
 and a fresh CI run:

+- **Growing Rust lists**: use slices (`const ITEMS: &[Item] = &[...];`) without a written
+  length. `cargo xtask lists` rejects non-test const/static arrays with more than ten lines
+  of entries, except fixed standard or algorithm tables listed with reasons in `xtask/src/lists.rs`.
+  Built-in themes need only a JSON file in `assets/styles/ui/themes/`, with a unique nonnegative
+  integer `order` (the picker order) and its own `provenance` line; keep existing order values.
 - **Message catalogs** (`assets/locales/*.json`): one message per line, sorted by id. Add your
  message anywhere and run `cargo xtask lists --fix`; `cargo xtask lists` (in `cargo xtask ci`
  and the Lists workflow) fails on an unsorted catalog or an id that appears twice.
 - **`mod` lines**: one per line, in the sorted group they belong to (`cargo fmt` keeps each group
  sorted). Add a new module into the existing group, not as a new group at the end.
+- **Commands without schemas** (`crates/engine/src/schema/unconverted.txt`): sorted, one id per
+  line, and it only shrinks. Converting a command removes its line; a new command is never added
+  to it.
+- **Toolbar commands without help** (`BACKLOG` in `crates/ui-egui/src/command_help.rs`): sorted,
+  one id per line, and it only shrinks. Writing a command's help removes its line; a new command
+  is never added to it.
+- **`ui.prefs` settings** (`docs/control-protocol.md`): one line per setting, sorted by name, in
+  the list under the protocol table; add a new setting on its own line rather than editing a shared
+  row.
 - **Languages** (`crates/ui-egui/src/i18n.rs`): one per line, English first, then by id (a test
  checks it).
 - **Generated files**: `THIRD-PARTY-LICENSES.txt` and `docs/features.md` are rewritten on `main`
  after each merge by the Generated files workflow (`cargo xtask licences`, `cargo xtask
  features`). Don't regenerate or edit them in a pull request.
 - **Design format**: one file per change, never an edit to a shared number (above).
+- **New UI strings and attribution rows**: one new file per change, `assets/locales/pending/<slug>.json`
+  and `attribution/pending/<slug>.md`, instead of editing the catalogs or the ATTRIBUTION.md table;
+  `cargo xtask fold-pending` folds them on `main` (see the README in each folder). A new English
+  message also needs every catalog delivered complete (`COMPLETE` in `crates/ui-egui/src/i18n.rs`:
+  today ar, he, ja, vi, and zh) in the same pending file; `cargo xtask i18n --check` reports any gap.

 ## Sending a change

@@ -316,6 +360,16 @@ Changes with no useful observable behavior do not need screenshot or video evide
 small example without private designs or sensitive details; attach the media or link to an
 accessible recording rather than committing generated review artifacts.

+To show a picture without committing it, attach the media to the PR (it goes to the PR's own
+attachment storage and renders inline in the comment). A gist is the better home for a log or
+another text file, and you link it; a gist does not render a picture inline. The review artifacts
+stay out of the diff that way, and nothing has to be pushed to a branch of its own.
+
+Attaching works in the browser for anyone who can comment: drag the file into a comment on the
+pull request. A command-line agent without a browser session usually cannot attach a file (the
+upload needs write access to this repository). Say so in the pull request, and the person running
+the agent or a maintainer can attach it.
+
 Keep an eye on your PR's status, but don't push to it only to catch up with `main` (no merge of
 `main`, no Update branch button, no rebase for that alone): every push restarts the whole CI
 run for everyone waiting behind it, and `main`'s own run catches what lands in between. When you
@@ -331,6 +385,10 @@ owning one area, with a human setting direction and reporting bugs. Their workin
 [AGENTS.md](AGENTS.md). Human contributors are just as welcome. Use whatever tools you like, as
 long as the change meets the rules above.

+Two quick checks run on every pull request (`.github/workflows/pr-checks.yml`, not required): it
+fails when a lower-numbered open PR by someone else already closes the same issue (the label
+`not-a-duplicate` skips it), or when the description lacks the `Changes a default: no` / `Changes a default: yes — <what>, old behaviour kept behind preference <name>` line (docs-only and bot PRs are exempt).
+
 ## Labels and triage

 The triage bot labels every new issue and PR (`.github/workflows/triage.yml`). It only adds labels;
@@ -367,7 +425,7 @@ In order of how much they'd help users:
 2. **Boolean robustness.** A random-design fuzzer currently gets about half of its designs
   through without a kernel error. Each failing seed is a reproducible bug.
 3. **Drawings, CAM and mesh tools.** These are out of scope for now (see
-   [ROADMAP.md](ROADMAP.md)), but anyone who wants to own one is welcome.
+   [ROADMAP.md](docs/roadmap-detail.md)), but anyone who wants to own one is welcome.

 ## Updating the generated feature list

@@ -130,10 +130,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b169f7a6d4742236a0a00c541b845991d0ac43e546831af1249753ab4c3aa3a0"
 dependencies = [
 "cfg-if",
- "cipher",
+ "cipher 0.4.4",
 "cpufeatures 0.2.17",
 ]

+[[package]]
+name = "aes"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35f0f96ce78e38c3dc6d8948aa8163d06385be74000f3c7a95bf1eef35d3ea32"
+dependencies = [
+ "cipher 0.5.2",
+ "cpubits",
+ "cpufeatures 0.3.1",
+]
+
 [[package]]
 name = "ahash"
 version = "0.8.12"
@@ -148,6 +159,21 @@ dependencies = [
 "zerocopy",
 ]

+[[package]]
+name = "alloc-no-stdlib"
+version = "2.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc7bb162ec39d46ab1ca8c77bf72e890535becd1751bb45f64c597edb4c8c6b3"
+
+[[package]]
+name = "alloc-stdlib"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e76a019e91224d279006ff972f1e984179a6e9feb050adba6ce8274aef23195"
+dependencies = [
+ "alloc-no-stdlib",
+]
+
 [[package]]
 name = "allocator-api2"
 version = "0.2.21"
@@ -504,6 +530,15 @@ dependencies = [
 "generic-array",
 ]

+[[package]]
+name = "block-padding"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "710f1dd022ef4e93f8a438b4ba958de7f64308434fa6a87104481645cc30068b"
+dependencies = [
+ "hybrid-array",
+]
+
 [[package]]
 name = "block2"
 version = "0.5.1"
@@ -544,6 +579,16 @@ dependencies = [
 "rustc_version",
 ]

+[[package]]
+name = "brotli-decompressor"
+version = "5.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a32acac15fe1967bc3986b2a6347dffc965602354ea6f450ad07e8bfd253583"
+dependencies = [
+ "alloc-no-stdlib",
+ "alloc-stdlib",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.20.3"
@@ -590,9 +635,9 @@ checksum = "fc652a48c352aef3ea3aed32080501cf3ef6ed5da78602a020c991775b0aff04"

 [[package]]
 name = "cadmpeg-codec-freecad"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2a5257265c2549cf59a8457b3c7aadcc96c95abe20205232553766993a808812"
+checksum = "3c4a8fa61748cbb3ce80838b00a8cebfe553460583941f5aba6e2b97c16b4d37"
 dependencies = [
 "cadmpeg-container",
 "cadmpeg-core",
@@ -601,14 +646,14 @@ dependencies = [
 "serde",
 "serde_json",
 "tempfile",
- "zip 8.6.0",
+ "zip",
 ]

 [[package]]
 name = "cadmpeg-codec-rhino"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7d88b42fb91c7e5af4c75c0433029771f7e3233a0b72ec3d0b2e5ff2c72bed07"
+checksum = "d7af41440d4c1d69e88e612de02cc3c9bad79d03429531e640ac924fef53c6bf"
 dependencies = [
 "cadmpeg-container",
 "cadmpeg-core",
@@ -625,53 +670,53 @@ dependencies = [

 [[package]]
 name = "cadmpeg-codec-step"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e83a52258c129a683f77fb360ca30af54ae34339625ad890be12621128a5811c"
+checksum = "35e1b6d17cf26b31f59f2edab8ef5c29d2a33216c581fd913f012ad4869bd559"
 dependencies = [
 "base64",
 "cadmpeg-container",
 "cadmpeg-core",
 "cadmpeg-ir",
 "encoding_rs",
+ "serde",
 "serde_json",
 "thiserror 2.0.21",
- "zip 8.6.0",
+ "zip",
 ]

 [[package]]
 name = "cadmpeg-container"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c110508cd9155e905f52906de505dfd42dc70a0321f5e90b5f68c28ba207686e"
+checksum = "5ab7bcef48ac7480b4917820272d85cd2c9533e17904e15b0e4d22f19a6045bd"
 dependencies = [
 "cadmpeg-core",
 "crc32fast",
 "flate2",
- "zip 8.6.0",
- "zstd 0.14.2",
+ "zip",
 ]

 [[package]]
 name = "cadmpeg-core"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "21b1147e51a74e7c52da5b393a0344597238cdc622fac6443eb2fd526759f6fa"
+checksum = "e86bb7a40521832504bb1f5953a1c706b2c52aad73bf6d84e1b35e5cb0beae3f"
 dependencies = [
 "flate2",
 "memchr",
 "roxmltree",
+ "ruzstd",
 "serde",
 "serde_json",
 "thiserror 2.0.21",
- "zstd 0.14.2",
 ]

 [[package]]
 name = "cadmpeg-ir"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71ff19f019f013d97e353bb802c5d2e253c2859aaa5422009aa933dc2f2e7dbc"
+checksum = "b570a1a8c579e407a9fd7bb10fa1900f8827f1d578b8fcb4ea2a056b5f323c72"
 dependencies = [
 "base64",
 "cadmpeg-core",
@@ -684,9 +729,9 @@ dependencies = [

 [[package]]
 name = "cadmpeg-registry"
-version = "0.6.1"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66046f1a694926707bea8944f861e699964b04c68972708588f97e14ccee3c5d"
+checksum = "b2be23469a9bca0b684f1811118fffb581ebd32ded08e6cc8b0716a41f8c1377"
 dependencies = [
 "cadmpeg-codec-freecad",
 "cadmpeg-codec-rhino",
@@ -755,7 +800,16 @@ version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "26b52a9543ae338f279b96b0b9fed9c8093744685043739079ce85cd58f289a6"
 dependencies = [
- "cipher",
+ "cipher 0.4.4",
+]
+
+[[package]]
+name = "cbc"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce2dc9ee5f88d11e0beb842c88b33c8a5cf0d1329c4b19494af42b07dbfe8896"
+dependencies = [
+ "cipher 0.5.2",
 ]

 [[package]]
@@ -844,7 +898,17 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773f3b9af64447d2ce9850330c473515014aa235e6a783b02db81ff39e4a3dad"
 dependencies = [
 "crypto-common 0.1.7",
- "inout",
+ "inout 0.1.4",
+]
+
+[[package]]
+name = "cipher"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8cf2a2c93cd704877c0858356ed03480ff301ee950b43f1cbe4573b088bfa6c"
+dependencies = [
+ "crypto-common 0.2.2",
+ "inout 0.2.5",
 ]

 [[package]]
@@ -969,6 +1033,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f8f80099a98041a3d1622845c271458a2d73e688351bf3cb999266764b81d48"

+[[package]]
+name = "cpubits"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15b85f9c39137c3a891689859392b1bd49812121d0d61c9caf00d46ed5ce06ae"
+
 [[package]]
 name = "cpufeatures"
 version = "0.2.17"
@@ -996,6 +1066,15 @@ dependencies = [
 "cfg-if",
 ]

+[[package]]
+name = "crossbeam-channel"
+version = "0.5.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98b0cc327b5bc766e7fda9c9260cc0fa81b43a8e240440422dff70788e3f9ef1"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.8"
@@ -1069,9 +1148,9 @@ version = "4.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "708b509edf7889e53d7efb0ffadd994cc6c2345ccb62f55cfd6b0682165e4fa6"
 dependencies = [
- "aes",
- "block-padding",
- "cbc",
+ "aes 0.8.4",
+ "block-padding 0.3.3",
+ "cbc 0.1.2",
 "dbus",
 "fastrand",
 "hkdf",
@@ -1181,6 +1260,15 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"

+[[package]]
+name = "ecb"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26f2a8b3e564eba0877223dc343703ad0385794e882e6d13f3a4dd5c6b1f41ac"
+dependencies = [
+ "cipher 0.5.2",
+]
+
 [[package]]
 name = "ecolor"
 version = "0.36.2"
@@ -1683,9 +1771,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "300e883d756b2e4ec94e02791f39b04b522276138852cfc41d9fb7e904106099"
 dependencies = [
 "cfg-if",
+ "js-sys",
 "libc",
 "r-efi 6.0.0",
 "rand_core 0.10.1",
+ "wasm-bindgen",
 ]

 [[package]]
@@ -1695,7 +1785,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee8cfcc411d9adbbaba82fb72661cc1bcca13e8bba98b364e62b2dba8f960159"
 dependencies = [
 "color_quant",
- "weezl",
+ "weezl 0.1.12",
 ]

 [[package]]
@@ -2153,10 +2243,20 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "879f10e63c20629ecabbb64a8010319738c66a5cd0c29b02d63d272b03751d01"
 dependencies = [
- "block-padding",
+ "block-padding 0.3.3",
 "generic-array",
 ]

+[[package]]
+name = "inout"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b5cf4372d022092674a83b8febf5865f7a573cc0c5baec5e49c879b6a20978f"
+dependencies = [
+ "block-padding 0.4.2",
+ "hybrid-array",
+]
+
 [[package]]
 name = "itertools"
 version = "0.13.0"
@@ -2271,6 +2371,16 @@ dependencies = [
 "syn 2.0.119",
 ]

+[[package]]
+name = "keyboard-types"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fbe853b403ae61a04233030ae8a79d94975281ed9770a1f9e246732b534b28d"
+dependencies = [
+ "bitflags 2.13.2",
+ "serde",
+]
+
 [[package]]
 name = "keyring"
 version = "3.6.3"
@@ -2411,6 +2521,33 @@ version = "0.4.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f9f8bd3e56ce4dfc153cf470fffbfa98c7620958b312ca5c3a4b8d5181fd13c6"

+[[package]]
+name = "lopdf"
+version = "0.45.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfffda0fe1ab0157e1a13c14bebd3f28671f2fccb7922f0722ec53926e6922d3"
+dependencies = [
+ "aes 0.9.3",
+ "bitflags 2.13.2",
+ "brotli-decompressor",
+ "cbc 0.2.1",
+ "ecb",
+ "encoding_rs",
+ "flate2",
+ "getrandom 0.4.3",
+ "indexmap",
+ "itoa",
+ "log",
+ "md-5",
+ "nom",
+ "rand 0.10.3",
+ "rangemap",
+ "sha2 0.11.1",
+ "stringprep",
+ "thiserror 2.0.21",
+ "weezl 0.2.1",
+]
+
 [[package]]
 name = "matext4cgmath"
 version = "0.1.0"
@@ -2420,6 +2557,16 @@ dependencies = [
 "num-complex",
 ]

+[[package]]
+name = "md-5"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69b6441f590336821bb897fb28fc622898ccceb1d6cea3fde5ea86b090c4de98"
+dependencies = [
+ "cfg-if",
+ "digest 0.11.3",
+]
+
 [[package]]
 name = "memchr"
 version = "2.8.3"
@@ -2480,6 +2627,24 @@ dependencies = [
 "pxfm",
 ]

+[[package]]
+name = "muda"
+version = "0.21.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4340e89c178916e62879c5c36b7f699019369be413e496178a6983ce91b8bc03"
+dependencies = [
+ "crossbeam-channel",
+ "dpi",
+ "keyboard-types",
+ "objc2 0.6.5",
+ "objc2-app-kit 0.3.2",
+ "objc2-core-foundation",
+ "objc2-foundation 0.3.2",
+ "png",
+ "thiserror 2.0.21",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "multiversion_no_op"
 version = "1.0.0"
@@ -2585,6 +2750,15 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2bf50223579dc7cdcfb3bfcacf7069ff68243f8c363f62ffa99cf000a6b9c451"

+[[package]]
+name = "nom"
+version = "8.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df9761775871bdef83bee530e60050f7e54b1105350d6884eb0fb4f46c2f9405"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "num"
 version = "0.4.3"
@@ -3391,6 +3565,7 @@ version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "65c9fb96cbc91e3478eaae79a69fcd3f1ae4ad052e471fe6732fff548984b4af"
 dependencies = [
+ "chacha20",
 "getrandom 0.4.3",
 "rand_core 0.10.1",
 ]
@@ -3435,6 +3610,12 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca45419789ae5a7899559e9512e58ca889e41f04f1f2445e9f4b290ceccd1d08"

+[[package]]
+name = "rangemap"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a611d15b50743feb4c76b7d03edcb0e64f399c26961e4efe6975bc398be6aa3d"
+
 [[package]]
 name = "raw-window-handle"
 version = "0.6.2"
@@ -3734,9 +3915,9 @@ checksum = "eec689c0bc40ff2458a5977b6619cb718087084a18e02a131c599b62d05e1a5f"

 [[package]]
 name = "rustls-webpki"
-version = "0.103.15"
+version = "0.103.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3c3cf1d8b1e7d4927e2d154c3fcb02979afb9939629c62cd9048d4f07b60ac2"
+checksum = "4443b1b6d39d7c663139942cc4558262562d2c84123bb6282ef177009ca8b281"
 dependencies = [
 "ring",
 "rustls-pki-types",
@@ -3749,6 +3930,15 @@ version = "1.0.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf54715a573b99ac80df0bc206da022bcd442c974952c7b9720069370852e21f"

+[[package]]
+name = "ruzstd"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69e4ce4a039f42bf25920b95667e4d789e98749ab11bbb8d2c2936f788421bb5"
+dependencies = [
+ "twox-hash",
+]
+
 [[package]]
 name = "same-file"
 version = "1.0.6"
@@ -3810,8 +4000,8 @@ version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e4d35ad99a181be0a60ffcbe85d680d98f87bdc4d7644ade319b87076b9dbfd4"
 dependencies = [
- "aes",
- "cbc",
+ "aes 0.8.4",
+ "cbc 0.1.2",
 "futures-util",
 "generic-array",
 "hkdf",
@@ -4162,7 +4352,7 @@ dependencies = [

 [[package]]
 name = "solidcraft"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "block2 0.6.2",
 "eframe",
@@ -4171,7 +4361,9 @@ dependencies = [
 "getrandom 0.3.4",
 "hidapi",
 "keyring",
+ "libc",
 "log",
+ "muda",
 "objc2 0.6.5",
 "objc2-app-kit 0.3.2",
 "objc2-foundation 0.3.2",
@@ -4181,25 +4373,29 @@ dependencies = [
 "rfd",
 "ron",
 "rustls",
+ "serde",
 "serde_json",
 "solidcraft-3dx-client",
 "solidcraft-engine",
+ "solidcraft-gpu",
 "solidcraft-space-mouse",
 "solidcraft-ui-egui",
 "ureq",
 "windows-sys 0.61.2",
 "winit",
+ "x11rb",
 ]

 [[package]]
 name = "solidcraft-3dx-client"
-version = "0.18.1"
+version = "0.27.1"

 [[package]]
 name = "solidcraft-cli"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "image",
+ "log",
 "serde_json",
 "solidcraft-engine",
 "solidcraft-gpu",
@@ -4208,7 +4404,7 @@ dependencies = [

 [[package]]
 name = "solidcraft-derive"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "proc-macro2",
 "quote",
@@ -4217,7 +4413,7 @@ dependencies = [

 [[package]]
 name = "solidcraft-doc"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "log",
 "serde",
@@ -4234,8 +4430,9 @@ dependencies = [

 [[package]]
 name = "solidcraft-engine"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
+ "image",
 "log",
 "schemars",
 "serde",
@@ -4248,12 +4445,13 @@ dependencies = [
 "solidcraft-render",
 "solidcraft-sketch",
 "thiserror 2.0.21",
+ "toml_edit",
 "web-time",
 ]

 [[package]]
 name = "solidcraft-geom"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "serde",
 "serde_json",
@@ -4262,15 +4460,18 @@ dependencies = [

 [[package]]
 name = "solidcraft-gpu"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
+ "image",
 "log",
 "naga",
 "pollster 0.4.0",
+ "robust",
 "serde",
 "serde_json",
 "solidcraft-engine",
 "solidcraft-geom",
+ "solidcraft-io",
 "solidcraft-kernel",
 "solidcraft-render",
 "thiserror 2.0.21",
@@ -4279,13 +4480,14 @@ dependencies = [

 [[package]]
 name = "solidcraft-io"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "cadmpeg-core",
 "cadmpeg-ir",
 "cadmpeg-registry",
 "chardetng",
 "encoding_rs",
+ "gethostname",
 "gltf",
 "log",
 "quick-xml",
@@ -4297,12 +4499,12 @@ dependencies = [
 "solidcraft-geom",
 "solidcraft-kernel",
 "thiserror 2.0.21",
- "zip 9.0.4",
+ "zip",
 ]

 [[package]]
 name = "solidcraft-kernel"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "log",
 "proptest",
@@ -4322,7 +4524,7 @@ dependencies = [

 [[package]]
 name = "solidcraft-mcp"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "serde_json",
 "solidcraft-engine",
@@ -4331,7 +4533,7 @@ dependencies = [

 [[package]]
 name = "solidcraft-render"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "image",
 "moxcms",
@@ -4340,38 +4542,43 @@ dependencies = [
 "serde_json",
 "sha2 0.10.9",
 "solidcraft-geom",
- "weezl",
+ "weezl 0.1.12",
 ]

 [[package]]
 name = "solidcraft-sketch"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
+ "harfrust",
 "serde",
 "serde_json",
 "solidcraft-geom",
 "thiserror 2.0.21",
 "ttf-parser",
+ "unicode-bidi",
 ]

 [[package]]
 name = "solidcraft-space-mouse"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "serde",
 ]

 [[package]]
 name = "solidcraft-ui-egui"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "arboard",
 "egui",
 "egui-wgpu",
 "image",
 "log",
+ "lopdf",
 "minisign-verify",
+ "nix 0.31.3",
 "pollster 0.4.0",
+ "proc-macro2",
 "semver",
 "serde",
 "serde_json",
@@ -4383,22 +4590,25 @@ dependencies = [
 "tiny-skia",
 "toml",
 "ttf-parser",
+ "unicode-bidi",
 "web-time",
 "winreg",
- "zip 9.0.4",
+ "zip",
 ]

 [[package]]
 name = "solidcraft-web"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
 "eframe",
 "egui",
 "js-sys",
 "log",
+ "percent-encoding",
 "serde_json",
 "solidcraft-engine",
 "solidcraft-ui-egui",
+ "url",
 "wasm-bindgen",
 "wasm-bindgen-futures",
 "web-sys",
@@ -4443,6 +4653,17 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6637bab7722d379c8b41ba849228d680cc12d0a45ba1fa2b48f2a30577a06731"

+[[package]]
+name = "stringprep"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b4df3d392d81bd458a8a621b8bffbd2302a12ffe288a9d931670948749463b1"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+ "unicode-properties",
+]
+
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -4564,7 +4785,7 @@ dependencies = [
 "flate2",
 "half",
 "quick-error",
- "weezl",
+ "weezl 0.1.12",
 "zune-jpeg",
 ]

@@ -4603,6 +4824,12 @@ dependencies = [
 "zerovec",
 ]

+[[package]]
+name = "tinyvec"
+version = "1.13.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fd3ca314f692efd6c868f8408f53fe444634a845f96c028b97d35f6a1f79f0ee"
+
 [[package]]
 name = "tokio"
 version = "1.53.2"
@@ -4645,6 +4872,7 @@ dependencies = [
 "indexmap",
 "toml_datetime",
 "toml_parser",
+ "toml_writer",
 "winnow",
 ]

@@ -4839,6 +5067,12 @@ version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d2df906b07856748fa3f6e0ad0cbaa047052d4a7dd609e231c4f72cee8c36f31"

+[[package]]
+name = "twox-hash"
+version = "2.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "86a801b3cea342a06d468c8710662aa29e5e05e4f5c0d62f00bbb7f2ad7941c2"
+
 [[package]]
 name = "type-map"
 version = "0.5.1"
@@ -4850,9 +5084,9 @@ dependencies = [

 [[package]]
 name = "typed-path"
-version = "0.12.3"
+version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e28f89b80c87b8fb0cf04ab448d5dd0dd0ade2f8891bae878de66a75a28600e"
+checksum = "9ce898823d8cd0f028662d2f349694b1af0a5cc9be83f1d213a00d3147445e1e"

 [[package]]
 name = "typeid"
@@ -4883,6 +5117,12 @@ version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eaea85b334db583fe3274d12b4cd1880032beab409c0d774be044d4480ab9a94"

+[[package]]
+name = "unicode-bidi"
+version = "0.3.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c1cb5db39152898a79168971543b1cb5020dff7fe43c8dc468b0885f5e29df5"
+
 [[package]]
 name = "unicode-general-category"
 version = "1.1.0"
@@ -4895,6 +5135,21 @@ version = "1.0.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d245f478577f809a851594d02313b640fb437e0bb33866753cff937863096954"

+[[package]]
+name = "unicode-normalization"
+version = "0.1.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "75cd3fb03d5288b3ba9a1ee103ac7e9cbb59f0b03d64f8ddfcc04dd42758a85d"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "unicode-properties"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7df058c713841ad818f1dc5d3fd88063241cc61f49f5fbea4b951e8cf5a8d71d"
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.13.3"
@@ -5283,9 +5538,9 @@ dependencies = [

 [[package]]
 name = "webpki-root-certs"
-version = "1.0.9"
+version = "1.0.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b96554aa2acc8ccdb7e1c9a58a7a68dd5d13bccc69cd124cb09406db612a1c9b"
+checksum = "58ec80e73fd8baf57bf0d9615554c75348bda990d6d5bbeab964dd068319fecb"
 dependencies = [
 "rustls-pki-types",
 ]
@@ -5296,6 +5551,12 @@ version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a28ac98ddc8b9274cb41bb4d9d4d5c425b6020c50c46f25559911905610b4a88"

+[[package]]
+name = "weezl"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4ca08e5ef825b65b056d9efbd95c8750683f0a6d0466d02e96dc2e4e360f3d2"
+
 [[package]]
 name = "wgpu"
 version = "30.0.1"
@@ -5766,8 +6027,6 @@ checksum = "d6bbff5f0aada427a1e5a6da5f1f98158182f26556f345ac9e04d36d0ebed650"
 [[package]]
 name = "winit"
 version = "0.30.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6755fa58a9f8350bd1e472d4c3fcc25f824ec358933bba33306d0b63df5978d"
 dependencies = [
 "ahash",
 "android-activity",
@@ -5920,10 +6179,15 @@ checksum = "e450f9b2ed1dff33c94c12589a87338689467b9c4f5d8a5710bd09a847d2c8a7"

 [[package]]
 name = "xtask"
-version = "0.18.1"
+version = "0.27.1"
 dependencies = [
+ "proc-macro2",
+ "serde",
 "serde_json",
 "sha2 0.10.9",
+ "syn 2.0.119",
+ "toml",
+ "zip",
 ]

 [[package]]
@@ -6213,30 +6477,18 @@ dependencies = [

 [[package]]
 name = "zip"
-version = "8.6.0"
+version = "9.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2d04a6b5381502aa6087c94c669499eb1602eb9c5e8198e534de571f7154809b"
-dependencies = [
- "crc32fast",
- "flate2",
- "indexmap",
- "memchr",
- "typed-path",
- "zstd 0.13.3",
-]
-
-[[package]]
-name = "zip"
-version = "9.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a954114b47a54df49f83d2722814e86b23d4bb1b54a1b90fb7d92b41619ddc22"
+checksum = "1156b39d142a34b999c2310a50455e0cb3760bf7efad0122f796d813bee26ccb"
 dependencies = [
 "crc32fast",
 "flate2",
+ "getrandom 0.4.3",
 "indexmap",
 "memchr",
 "nix 0.31.3",
 "typed-path",
+ "windows-sys 0.61.2",
 "zopfli",
 ]

@@ -6264,52 +6516,6 @@ dependencies = [
 "simd-adler32",
 ]

-[[package]]
-name = "zstd"
-version = "0.13.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e91ee311a569c327171651566e07972200e76fcfe2242a4fa446149a3881c08a"
-dependencies = [
- "zstd-safe 7.3.0",
-]
-
-[[package]]
-name = "zstd"
-version = "0.14.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "057cfd910cfac363a0ada849592624b4c9ff2e10bef504c3433810d78ed96f93"
-dependencies = [
- "zstd-safe 8.1.0",
-]
-
-[[package]]
-name = "zstd-safe"
-version = "7.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "64d80649ab6db9d9f6f9c80a40becd948eda4714a0a5ac8c4d157a32231c7882"
-dependencies = [
- "zstd-sys",
-]
-
-[[package]]
-name = "zstd-safe"
-version = "8.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdd44c6a7284e91f3717755b24315a302edd9153a01f753c3cba3d765e8eafac"
-dependencies = [
- "zstd-sys",
-]
-
-[[package]]
-name = "zstd-sys"
-version = "2.1.1+zstd.1.5.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aeec9eaf2dffbbd09201e23bd0ffcbaa33bb8e9266a10734fd7ed90a85eca078"
-dependencies = [
- "cc",
- "pkg-config",
-]
-
 [[package]]
 name = "zune-core"
 version = "0.5.3"
@@ -5,7 +5,7 @@ members = ["crates/*", "apps/*", "xtask"]
 exclude = ["vendor"]

 [workspace.package]
-version = "0.18.1"
+version = "0.27.1"
 edition = "2024"
 license = "MIT OR Apache-2.0"
 rust-version = "1.95"
@@ -13,6 +13,7 @@ authors = ["SolidCraft contributors"]
 repository = "https://github.com/bherbruck/solidcraft"

 [workspace.dependencies]
+robust = "1.2"
 # internal
 solidcraft-geom = { path = "crates/geom" }
 solidcraft-sketch = { path = "crates/sketch" }
@@ -66,17 +67,23 @@ encoding_rs = "0.8"
 # glTF 2.0 import (MIT OR Apache-2.0): the document model and GLB container only; buffers are
 # read by crates/io itself, so no image decoding or file access comes with it.
 gltf = { version = "1.4", default-features = false, features = ["names"] }
+# The computer's name in a design's "open elsewhere" lock file (MIT OR Apache-2.0; already in the
+# tree through x11rb).
+gethostname = "1"

-# FreeCAD and Rhino import (Apache-2.0, pure Rust apart from zstd; native builds only).
+# FreeCAD and Rhino import (Apache-2.0, pure Rust; native and browser builds).
 # Pinned: its IR and codec APIs change between minor versions. Open formats only: no default
 # features, so cadmpeg's codecs for commercial formats (f3d, sldprt, inventor, catia, creo, nx)
 # and its ShapeManager/ACIS `sat` codec are not compiled in. `step` is the writer we restate through.
-cadmpeg-core = "=0.6.1"
-cadmpeg-ir = "=0.6.1"
-cadmpeg-registry = { version = "=0.6.1", default-features = false, features = ["fcstd", "rhino", "step"] }
+cadmpeg-core = "=0.6.3"
+cadmpeg-ir = "=0.6.3"
+cadmpeg-registry = { version = "=0.6.3", default-features = false, features = ["fcstd", "rhino", "step"] }

 # fonts (sketch text outlines; MIT OR Apache-2.0, pure Rust)
-ttf-parser = { version = "0.25", default-features = false, features = ["std"] }
+ttf-parser = { version = "0.25", default-features = false, features = ["std", "variable-fonts"] }
+
+# Ends a process group with the system call (MIT; already in the tree through zip).
+nix = { version = "0.31", default-features = false, features = ["signal"] }

 # images
 image = { version = "0.25", default-features = false, features = ["png", "hdr"] }
@@ -154,6 +161,10 @@ matext4cgmath = { path = "vendor/matext4cgmath" }
 # Keep OpenGL pipelines, resolve textures and CAD callbacks at the same safe sample count.
 egui-wgpu = { path = "vendor/egui-wgpu" }

+# Deliver trackpad pinch and rotation gestures on Wayland (zwp_pointer_gestures_v1), which
+# winit 0.30 never binds and eframe 0.36 still requires winit 0.30.
+winit = { path = "vendor/winit" }
+
 # Mutation testing (cargo-mutants, docs/mutation-testing.md): the ci profile with incremental
 # builds, since every mutant rebuilds the crates above the one it changes.
 [profile.mutants]
@@ -0,0 +1,44 @@
+# Disclaimer
+
+This disclaimer covers the software, models, data, documentation and every other file in this
+repository and in the releases built from it (together, "the files").
+
+## No warranty
+
+The files are provided "as is", without warranty of any kind, express or implied, including
+warranties of accuracy, merchantability, fitness for a particular purpose and non-infringement.
+Results produced with the files, such as geometry, meshes, analyses and simulations, can be
+wrong. A qualified person must check them before anyone relies on them for a design,
+manufacturing or safety decision.
+
+## No liability
+
+To the fullest extent permitted by law, Tangency Labs and the contributors are not liable for any
+claim, damage, loss or other liability arising from the files or from their use, modification or
+distribution, whether in contract, tort or otherwise.
+
+## No indemnity
+
+Neither Tangency Labs nor any contributor indemnifies, defends or holds harmless anyone who uses,
+modifies or distributes the files, including against claims that the files infringe someone
+else's rights.
+
+## Harmful or unlawful use
+
+Tangency Labs and the contributors do not authorise, endorse or accept any responsibility for use
+of the files to harm people, animals, property or the environment, or for any unlawful use.
+Whoever uses the files is solely responsible for how they use them, for what they make with them
+and for complying with the laws that apply to them. Tangency Labs and the contributors must not be
+named or held out as responsible for any such use.
+
+## No endorsement
+
+Using, modifying or distributing the files does not mean that Tangency Labs or any contributor
+endorses you, your product or your results. Do not use the name of Tangency Labs or of a
+contributor to suggest such an endorsement without written permission.
+
+## Relation to the licence
+
+This disclaimer adds to the warranty and liability terms of the licence the files are distributed
+under. It does not restrict any right that licence grants; where the two differ, the licence
+governs.
@@ -1,5 +1,5 @@
 <p align="center">
-  <img src="assets/icons/app/linux/exports/hicolor/256x256/apps/ai.storyteller.solidcraft.png" width="96" height="96" alt="SolidCraft" />
+  <img src="assets/icons/app/linux/exports/hicolor/256x256/apps/io.tangencylabs.solidcraft.png" width="96" height="96" alt="SolidCraft" />
 </p>

 <h1 align="center">SolidCraft</h1>
@@ -42,25 +42,25 @@
 </p>

 <p align="center">
-  <a href="https://trendshift.io/repositories/296178?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-296178" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/296178/daily" alt="tangency-labs%2Fsolidcraft | Trendshift" width="250" height="55"/></a>
-  <a href="https://trendshift.io/repositories/296178?utm_source=trendshift-badge&amp;utm_medium=badge&amp;utm_campaign=badge-trendshift-296178" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/296178/daily?language=Rust" alt="tangency-labs%2Fsolidcraft | Trendshift (Rust)" width="250" height="55"/></a>
+  <a href="https://trendshift.io/repositories/296178?utm_source=trendshift-badge&utm_medium=badge&utm_campaign=badge-trendshift-296178" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/296178/daily" alt="tangency-labs%2Fsolidcraft | Trendshift" width="250" height="55"/></a>
+  <a href="https://trendshift.io/repositories/296178?utm_source=trendshift-badge&utm_medium=badge&utm_campaign=badge-trendshift-296178" target="_blank" rel="noopener noreferrer"><img src="https://trendshift.io/api/badge/trendshift/repositories/296178/daily?language=Rust" alt="tangency-labs%2Fsolidcraft | Trendshift (Rust)" width="250" height="55"/></a>
 </p>

-![SolidCraft 0.8: model a Raspberry Pi 4 case from an empty design: a sketch dimensioned with parameters, extrude, fillets and shell, a rim rounded in one pick, standoffs patterned on the board's mounting holes, port cut-outs, vent slots, "Pi 4" engraved in a font, a PETG material with its mass in Properties, and a height change in Parameters](docs/screenshots/demo-0.8.gif)
+![SolidCraft: model a Raspberry Pi 4 case from an empty design: a sketch dimensioned with parameters, extrude, fillets and shell, a rim rounded in one pick, standoffs patterned on the board's mounting holes, port cut-outs, vent slots, "Pi 4" engraved in a font, a PETG material with its mass in Properties, and a height change in Parameters](docs/screenshots/demo.gif)

-*A Raspberry Pi 4 case from an empty design: a sketch dimensioned with the board's parameters, extrude, fillet, shell, the rim rounded in one pick, an M2.5 standoff patterned on the 58 × 49 mm hole rectangle, port cut-outs, vent slots, "Pi 4" engraved in DejaVu Sans Bold and a PETG material defined in the design, with its mass in Properties, then height 24 → 32 mm in Parameters and it all rebuilds. 9× playback. [Full video](https://github.com/tangency-labs/solidcraft/raw/refs/heads/main/docs/screenshots/demo-0.8.mp4), recorded with the [demo script](examples/demo/record_ui.sh).*
+*A Raspberry Pi 4 case from an empty design: a sketch dimensioned with the board's parameters, extrude, fillet, shell, the rim rounded in one pick, an M2.5 standoff patterned on the 58 × 49 mm hole rectangle, port cut-outs, vent slots, "Pi 4" engraved in DejaVu Sans Bold and a PETG material defined in the design, with its mass in Properties, then height 24 → 32 mm in Parameters and it all rebuilds. 6× playback with the idle pauses cut. [Full video](https://github.com/tangency-labs/solidcraft/raw/refs/heads/main/docs/screenshots/demo.mp4), recorded with the [demo script](examples/demo/record_ui.sh).*

 ## Download

- **Windows:** the [installer][windows-msi], or `winget install bherbruck.SolidCraft`.
+- **Windows:** the [installer][windows-msi].
 - **macOS:** the [disk image][macos-dmg] (Apple silicon and Intel).
 - **Linux:** the [AppImage][linux-appimage], or `sudo snap install solidcraft` ([Snap Store][snap-store]).
 - **Web:** [try it in your browser][web-app], no install.

 ARM64 and 32-bit builds, portable zip, .deb, .rpm, Flatpak and the other packages are on the
-[downloads page](docs/downloads.md). The downloads aren't signed yet: on Windows choose
-**More info**, then **Run anyway** in SmartScreen; on macOS right-click SolidCraft and choose **Open**
-the first time. On SolidCraft 0.11 to 0.14, download once by hand; see
+[downloads page](docs/downloads.md). The macOS app is signed with a Developer ID and notarized by
+Apple. The Windows downloads aren't signed yet: choose **More info**, then **Run anyway** in
+SmartScreen. On SolidCraft 0.11 to 0.14, download once by hand; see
 [updating](https://docs.solidcraft.io/guide/updates.html#updating-from-011-to-014).

 ## What works
@@ -74,7 +74,7 @@ other is a tracked bug.
 - **Parameters and configurations** with unit-aware expressions.
 - **Assemblies** with joints, motion studies, contact sets, interference and mass properties.
 - **Sheet metal** with flanges, hems, fold/unfold and flat patterns, and plastic enclosure features.
- **Files:** STEP, IGES, 3MF, STL, OBJ and glTF in and out where supported, URDF export, `.solidcraft` designs.
+- **Files:** STEP, IGES, 3MF, STL, OBJ and glTF in and out where supported, URDF export, `.sc` designs (`.solidcraft` files from earlier releases still open).
 - **Desktop app, browser app, headless CLI and MCP server**, all running the same commands.

 The full list is in [docs/capabilities.md](docs/capabilities.md) and [docs/features.md](docs/features.md);
@@ -96,8 +96,10 @@ More commands, the Windows cross-build and the browser build are in [docs/buildi

 `solidcraft-cli mcp` is a [Model Context Protocol](https://modelcontextprotocol.io) server. Headless it
 runs its own design session, or with `--connect` it drives the running app so you can watch.
-Claude Code: `claude mcp add solidcraft -- solidcraft-cli mcp`. Tools, access rules and an
-example session: [docs/mcp.md](docs/mcp.md).
+Claude Code: `claude mcp add solidcraft -- solidcraft-cli mcp`. If a terminal doesn't find
+`solidcraft-cli` (older Windows installers don't put it on `PATH`), give its full path (by default
+`"C:\\Program Files\\SolidCraft\\solidcraft-cli.exe"`). Tools, access rules and an example session:
+[docs/mcp.md](docs/mcp.md).

 ## Scripts

@@ -119,6 +121,12 @@ the clean-room and licence rules, and where help is wanted most. Open work is in
 SolidCraft's continuous integration runs on [Blacksmith](https://www.blacksmith.sh), which
 sponsors its CI minutes.

+## Disclaimer
+
+The files in this repository are provided as is, without warranty, liability or indemnity, and
+Tangency Labs and the contributors accept no responsibility for any harmful or unlawful use of
+them: read [DISCLAIMER.md](DISCLAIMER.md).
+
 ## Licence

 MIT OR Apache-2.0, at your option. Developed under the
@@ -142,3 +150,4 @@ Tinkercad are trademarks of their respective owners, named only to describe comp
 [linux-appimage]: https://github.com/tangency-labs/solidcraft/releases/latest/download/solidcraft-linux-x86_64.AppImage
 [snap-store]: https://snapcraft.io/solidcraft
 [web-app]: https://solidcraft.io/app
+
@@ -1,5 +1,85 @@
 # SolidCraft roadmap

+The short version, for people who use SolidCraft. The detailed developer status (milestone
+tables, limitations, measurements) is in [docs/roadmap-detail.md](docs/roadmap-detail.md).
+
+## What SolidCraft is
+
+SolidCraft is open-source parametric 3D CAD written in Rust. You sketch, constrain, extrude, and
+change a parameter to watch the timeline rebuild. It runs as a desktop app and in the browser
+([try it](https://solidcraft.io/app)), and it has a command-line tool and an MCP server so that
+scripts and AI agents can drive the same commands you use.
+
+## Works today
+
+- Sketching with a constraint solver, and the usual create and modify tools.
+- Extrude, revolve, loft, sweep, coil, fillet, chamfer, shell, draft, holes, threads,
+  patterns, mirror and split.
+- Parameters with units and expressions, and configurations.
+- Faces and edges keep their names through edits, so references survive changes.
+- Components, assemblies, joints, motion studies and exploded views.
+- Sheet metal with flat patterns and DXF export, and a plastic-enclosure subset.
+- A Render workspace with GPU rendering, studio lighting, materials and image export
+  (first release in 0.22.0).
+- Import and export of STEP, IGES, 3MF, STL, OBJ and DXF, and FreeCAD and Rhino files.
+- Autosave and crash recovery, and the browser build of the same app.
+
+The full list of commands is in [docs/features.md](docs/features.md). Release notes for each
+version are on the [releases page](https://github.com/tangency-labs/solidcraft/releases).
+
+## In progress now
+
+Each feature below is a [milestone](https://github.com/tangency-labs/solidcraft/milestones) holding
+the issues for it, so the count shows how far along it is. Counts are as of 2026-10-25, one per
+feature or request. Work merged on a feature branch (`drawings`, `render`) counts as built but
+reaches the app only when that branch merges. They are rough, not a promise.
+
+- **[Rendering & materials](https://github.com/tangency-labs/solidcraft/milestone/17)**: in progress, 9 of 34 pieces done, 3 of them built only on the `render` branch and in the app when it merges. The basic Render workspace is already in releases (0.22.0); the interface rework (#6281) and the material and light libraries are what is left.
+- **[Drawings](https://github.com/tangency-labs/solidcraft/milestone/8)**: in progress, 3 of 21 pieces built (2 in releases, 1 on the `drawings` branch), and 3 more partly built there (sheets and borders, bill-of-materials types, the paper scene). Not in the app yet: it lands when the `drawings` branch merges. Today you can export the current view as a DXF.
+- **[Sheet metal](https://github.com/tangency-labs/solidcraft/milestone/15)**: in progress, 1 of 30 requests done. Flanges, hems, unfold and flat patterns already work; the 30 are extensions, mostly the per-edge flange options (segments, miters, partial flanges, reliefs) and bend allowance.
+- **[Sketching](https://github.com/tangency-labs/solidcraft/milestone/14)**: in progress, 12 of 50 pieces done. Dimension types, selection and snapping options.
+- **[Solid modeling](https://github.com/tangency-labs/solidcraft/milestone/2)**: in progress, 9 of 50 pieces done. Blends, holes, threads and patterns.
+- **[Assemblies & joints](https://github.com/tangency-labs/solidcraft/milestone/3)**: in progress, 4 of 19 pieces done. Joints, motion studies and exploded views already work; placement rules, linked sub-assemblies, fastener stacks and weldment corners are the pieces left.
+- **[Import & export](https://github.com/tangency-labs/solidcraft/milestone/5)**: in progress, 7 of 39 pieces done. FreeCAD, SolidWorks and point-cloud import, and mesh export options.
+- **[AI agents & MCP](https://github.com/tangency-labs/solidcraft/milestone/18)**: in progress, 2 of 8 pieces done. Agent chat and the MCP server.
+- **[Interface, web app & plugins](https://github.com/tangency-labs/solidcraft/milestone/4)**: in progress, 31 of 96 pieces done. Ribbon redesign, navigation, themes, the web app and plugins.
+- **[SMLib kernel migration](https://github.com/tangency-labs/solidcraft/milestone/1)**: in progress, 1 tracking issue open. The kernel is moving from truck to NVIDIA's SMLib (usd-brep, Apache-2.0) on the `kernel-smlib` branch; it is not in releases yet. Tracked in [#4012](https://github.com/tangency-labs/solidcraft/issues/4012).
+
+## Next
+
+- **[Surfacing](https://github.com/tangency-labs/solidcraft/milestone/16)**: next, 6 of 14 pieces done. Patch, trim, blend and match exist; the rest of the surface toolset is planned.
+- **[Manufacturing / CAM](https://github.com/tangency-labs/solidcraft/milestone/9)**: next, 1 pieces tracked, none done. There is no CAM in SolidCraft yet. Send to Slicer and a first toolpath slice are in review; proposals are [#1153](https://github.com/tangency-labs/solidcraft/issues/1153) and [#1621](https://github.com/tangency-labs/solidcraft/issues/1621).
+
+Features are not tied to a release or a date. Work lands in the daily releases as it is finished.
+Anything without a milestone, such as bug fixes, is not a feature and is not listed here.
+
+## How releases work
+
+- Releases ship daily, as numbered versions (v0.22.0, v0.22.1) with nightly pre-releases in
+  between. They are delivered through the in-app updater.
+- SolidCraft tells you when a newer stable release exists and never updates without asking.
+  Where it can replace itself safely (AppImage, Windows installer and portable builds) there is
+  an **Update now** button; downloads are checked against the release's SHA-256 list. See
+  [updates and privacy](docs/book/src/guide/updates.md).
+- Design files carry a format number. A new version opens designs from older versions, but an
+  older version refuses a design saved by a newer one (0.22.0 writes format 35, and 0.21.0 and
+  earlier will not open it). Each release's notes say when the format changed. Keep a copy of
+  an important design before you move to a new version.
+
+## Licence
+
+SolidCraft is licensed MIT OR Apache-2.0, at your option; see [LICENSE-MIT](LICENSE-MIT) and
+[LICENSE-APACHE](LICENSE-APACHE). Versions already released stay available under those licences
+permanently.
+
+## How to follow along
+
+- Feature milestones: <https://github.com/tangency-labs/solidcraft/milestones>
+- Issues: <https://github.com/tangency-labs/solidcraft/issues> (area labels such as
+  `area:kernel`, `area:sketch` and `area:ui` group them)
+- Discord: <https://discord.gg/FtU4NQNVDH>
+- Releases: <https://github.com/tangency-labs/solidcraft/releases>
+- Contributing: [CONTRIBUTING.md](CONTRIBUTING.md)
 Status as of **2026-10-14**. SolidCraft supports parametric modelling (sketch →
 features → parametric timeline) as an open, pure-Rust, agent-drivable application.

@@ -51,26 +131,37 @@ PCB / Package, Render, Animation, Simulation, Manufacture/CAM, Drawings.
 |---|---|---|---|
 | M0 | Vertical slice | done | — |
 | M1 | Sketch depth: command coverage implemented — projection/intersect/include as linked geometry (auto-project on faces, lost-reference warnings, break link), full SKETCH create/modify set (slots, polygons, tangent arcs/circles, ellipse, fit/control splines, conic, text, trim/extend/break, fillet/chamfer, offset, mirror, patterns, move/scale, blend curve, centerline), constraints incl. curvature and polygon with over-constraint refusal, Shift-picked line midpoints in Horizontal/Vertical using persisted points and ordinary constraints (#2087), driven/arc-length/linear-diameter dimensions, AutoConstrain, DXF/SVG insert, 3D sketch curves (Project To Surface, Intersection Curve, Isoparametric Curve, Spun Profile), exact free-form profiles (B-spline/NURBS edges, any spline degree, curves cut by crossings), sweeps and pipes along 3D sketch curves, canvases and decals, curvature combs. Exact free-form Extend and certified associative offsets now preserve geometry and IDs through edits, deletion and reopen. Occurrence-frame 3D wires now store explicit coordinate spaces and retain points and analytic fits through moves, refresh, undo and reopen. Constructive sketch solving (Owen 1991, Fudos & Hoffmann 1997) ahead of the numerical solver: points and rigid clusters are placed on the branch the sketch had, so dimension edits and drags keep their solution; edits that would turn a sketch over are refused; drags re-solve only the sketch per frame. Remaining workflow repairs: mixed offset junctions, legacy natural-spline seams, and damaged legacy wire links lacking frame provenance | in progress | 4 |
+| M2 | Robust modelling: coplanar booleans in the kernel, holes (placed on faces, at distances from reference edges, and on sketch points), threads (cosmetic, then modelled), patterns, mirror, shell, draft, split, construction geometry | in progress | 16 |
+| M1 | Sketch depth: command coverage implemented — projection/intersect/include as linked geometry (auto-project on faces, lost-reference warnings, break link), full SKETCH create/modify set (slots, polygons, tangent arcs/circles, ellipse, fit/control splines, conic, text, trim/extend/break, fillet/chamfer, offset, mirror, patterns, move/scale, blend curve, centerline), constraints incl. curvature and polygon with over-constraint refusal, Shift-picked line midpoints in Horizontal/Vertical using persisted points and ordinary constraints (#2087), drawing snaps to where two lines, circles or arcs cross (#4967), driven/arc-length/linear-diameter dimensions, AutoConstrain, DXF/SVG insert, 3D sketch curves (Project To Surface, Intersection Curve, Isoparametric Curve, Spun Profile), exact free-form profiles (B-spline/NURBS edges, any spline degree, curves cut by crossings), sweeps and pipes along 3D sketch curves, canvases and decals, curvature combs. Exact free-form Extend and certified associative offsets now preserve geometry and IDs through edits, deletion and reopen. Occurrence-frame 3D wires now store explicit coordinate spaces and retain points and analytic fits through moves, refresh, undo and reopen. Constructive sketch solving (Owen 1991, Fudos & Hoffmann 1997) ahead of the numerical solver: points and rigid clusters are placed on the branch the sketch had, so dimension edits and drags keep their solution; edits that would turn a sketch over are refused; drags re-solve only the sketch per frame. Remaining workflow repairs: mixed offset junctions, legacy natural-spline seams, and damaged legacy wire links lacking frame provenance | in progress | 4 |
 | M2 | Robust modelling: coplanar booleans in the kernel, holes (placed on faces and on sketch points), threads (cosmetic, then modelled), patterns, mirror, shell, draft, split, construction geometry | in progress | 16 |
 | M3 | General fillets and chamfers (curved edges, chains, vertex blends); saddle rolling-ball surfaces now use continuous seam sections and arc-length fitting with shared contact boundaries and bounded accuracy checks; tiny rim edges remain selected instead of nearby wall seams when filleting (#2498) | in progress | 30 |
-| M4 | Files: STEP import (done — [docs/step-import.md](docs/step-import.md)), FreeCAD/Rhino solids through cadmpeg (done, desktop and CLI), 3MF export and 3MF/STL import as mesh bodies (done), 3MF with B-rep face tags ([docs/formats/3mf-face-tags.md](docs/formats/3mf-face-tags.md), done), constant-section parametric mesh reconstruction, DXF sketches, OBJ import | in progress | 6 |
+| M4 | Files: STEP import (done — [docs/step-import.md](docs/step-import.md)), FreeCAD/Rhino solids through cadmpeg (done, desktop, browser and CLI), 3MF export and 3MF/STL import as mesh bodies (done), 3MF with B-rep face tags ([docs/formats/3mf-face-tags.md](docs/formats/3mf-face-tags.md), done), constant-section parametric mesh reconstruction, DXF sketches, OBJ import, PLY/XYZ point clouds as a modelling reference and PLY meshes (done — [docs/point-clouds.md](docs/point-clouds.md), #5151) | in progress | 6 |
 | M5 | Persistent naming of faces and edges (docs/book/src/dev/naming.md): faces named from their exact kernel-reported history (sketch curve sides, caps, revolve sections, primitive sides, blends, shell inner walls, pattern/mirror copies; split pieces told apart by the faces around them, lumps of a cut body named after their faces), edges by their faces; fillets/chamfers, sketches on faces, shell/draft/offset/replace faces, hole placements, joint origins and face appearances resolve by name first and warn when the entity split or vanished: done. sheet metal edges by base sketch line and flange side, shell inner faces, sweep and loft roles: done. kernel-reported face history: done (merged faces answer to every name; operations without history yet fall back to geometric names, flagged unverified; format 14 keeps older designs' geometric names). Left: history through sheet metal, plastic, surface and emboss features; FaceSource certificates through history | in progress | 20 |
-| M6 | UI depth: selection feedback and origin (done), timeline editing (done: hover and selection highlight modifier faces, including fillets and chamfers; edit feature, history marker drag, dependency-checked single and multi-item reorder, suppress, rename, delete with dependents, re-resolved references; redefining selections refreshes persistent edge/face references while retaining feature identity and dimension names; optional compact named left feature history with rollback bar, multi-selection and persistent folders above the parts browser), right-docked dialogs (done), live previews for every feature dialog (done), keyboard-first commands with on-canvas value boxes and sketch inline dimensions (done), drag manipulators with automatic join/cut (done: extrude incl. two sides, fillet, shell, hole depth, move, pattern spacing, revolve rotator, extrude taper), dark theme (done), right-click menu with Repeat (done), measure tool (done), section analysis (done), selection filter (done), drag-solve of sketch points (done); appearance controls now preserve body/face/component targeting, named transparent looks, reuse/search and override removal; preferences | in progress | 6 |
+| M6 | UI depth: selection feedback and origin (done), timeline editing (done: hover and selection highlight modifier faces, including fillets and chamfers; edit feature, history marker drag, dependency-checked single and multi-item reorder, suppress, rename, delete with dependents, re-resolved references; redefining selections refreshes persistent edge/face references while retaining feature identity and dimension names; responsive feature history with width-driven icons/names/title, snapping width resize, bottom/left/browser-stack docking, shared-column collapse, rollback bar, multi-selection and persistent folders), right-docked dialogs (done), live previews for every feature dialog (done), keyboard-first commands with on-canvas value boxes and sketch inline dimensions (done), drag manipulators with automatic join/cut (done: extrude incl. two sides, fillet, shell, hole depth, move, pattern spacing, revolve rotator, extrude taper), dark theme (done), right-click menu with Repeat (done), measure tool (done), section analysis (done), selection filter (done), drag-solve of sketch points (done); appearance controls now preserve body/face/component targeting, named transparent looks, reuse/search and override removal; Browser Expand All / Collapse All (`browser.expand_all`, `browser.collapse_all`) on the design and component menus; preferences | in progress | 6 |
 | M7 | Thin extrude (walls along open or closed curves: centre, inside, outside or two sides; mitred corners, crossing walls joined; #721), sweep, loft (incl. to a point), rib and web (to next / depth), emboss (planar faces and exact radial emboss/deboss of bounded orthogonal profiles on complete exterior cylinders/sleeves), thread (cosmetic, and modelled M3–M20 outside and inside: the ISO profile screwed in as a faceted cut), coil (smooth B-spline helical walls), pipe, pattern on path, patterns of bodies and components, replace face (parallel), align, remove, feature copy/paste: done. Unique eligible cylindrical targets are inferred for new Emboss features. Left: general curved-face emboss and exact (unfaceted) modelled threads | in progress | 12 |
 | M8 | Surface workspace (#772). Done: Patch (sketch regions; edge loops filled G0, plus `crown`), Stitch, Thicken (planes and cylinders), Extend (straight edges of planar surfaces), Trim (by a plane, a face or sketch curves swept onto the surface, keeping a side or the picked regions; mutual trim of two surfaces, extended to meet and stitched, #767), Delete Face (healing), Boundary Fill, zebra/draft/curvature-map analysis, Surface Extrude/Revolve/Sweep/Loft from open and closed curves, Offset, Unstitch and Reverse Normal; the continuity-driven core (`kernel/src/bridge.rs`, G0–G3 Hermite rows) with **Blend** (`surface.blend`, #764: edge chains along one or several faces, closed rims paired seam to seam or from picked seams, a dialog), **Match** (`surface.match`), **Boundary** (`surface.boundary`, #763 — two sketch curves exact with G0–G3, three or four as the flat patch of their loop, and curve networks: Coons and Gordon surfaces through sketch, 3D-sketch or edge curves, a point for a three-sided side, G1/G2 against the faces along one direction's edges, joined into their body on request; G1/G2 on two sides that meet at a corner waits for the Gregory-type corner), **Fair** (`surface.fair`, CV fairing), **continuity analysis** (`inspect.continuity`, #770; a toolbar tool with edge markers and a legend, and curvature combs along face isocurves) and a multi-section **loft** with per-end continuity and crown, and guide rails on solid and surface lofts (one or two, scaling or stretching the sections between; #201). Also in the Class-A pass: G1…G4 blend curves in the sketch, chord and variable-radius fillets on curved edges (with honest refusals where the fit cannot hold), and a G2 corner patch where filleted edges meet (kernel; the command refuses until the patch's sections can be sewn to the blends' contacts). Left: bias/form-factor fillet sections (design recorded), a Gregory-type corner, surface Fillet between separate surface bodies (#769), Ruled (#762), Untrim (#761), curved-face Extend (#760), and every remaining #757–#772 item | deferred | — |
-| M9 | Components and assemblies: New Component / Create Components from Bodies, active component, per-component origin/bodies/sketches/timeline entries, occurrences with transforms, Copy/Paste vs Paste New, nested Browser tree with visibility and isolate; Ground, Move/Copy of occurrences, joints (rigid, revolute, slider, cylindrical, pin-slot, planar, ball) by joint origins with limits and Drive Joints, closed kinematic loops (four-bar, slider-crank: the loop's other joints follow the driven one on its branch, and driving stops where a loop can no longer close), cams (`joint.cam`: a revolute cam drives a slider or revolute follower along a closed sketch profile or the cam's edges, knife, roller or flat followers, worked out again when the profile changes; drives, studies, closed loops, contact sets), As-built Joint, Rigid Group, Contact Sets (driving and motion studies stop where bodies in a set would pass through each other), Motion Study (joint values keyed along a timeline, playback, export of occurrence positions as JSON/CSV), motion analysis (joint values and a point's path charted over a study as value, velocity and acceleration; the parts that collide along a study, with the steps where they do), Exploded views (automatic or by hand, shown without changing placements); interference, per-component physical properties; STEP with assembly structure; URDF export for robot simulators (links with meshes, mass and inertia; joint chains whose values match Drive Joints; docs/urdf.md). Physical properties now measure material-aware component/occurrence placements, descendants and repeated instances, including pending moves and body reassignment offsets; contact geometry and automatic exploded centres respect those offsets. Groundwork done: component tree, occurrences with transforms (instances, Paste New), world placement, active component as authoring frame, ground, Capture/Revert Position, moving bodies and sketches. UI: ASSEMBLE panel dialogs for New Component, Joint (snaps on faces, edges, circles and vertices; animated motion preview; offsets, flip, limits), As-built Joint, Joint Origin, Rigid Group, Drive Joints (live slider), Motion Link, Cam and Interference (overlaps shown red); joints in the timeline and the Browser | in progress | 32 |
+| M9 | Components and assemblies: New Component / Create Components from Bodies, active component, per-component origin/bodies/sketches/timeline entries, occurrences with transforms, Copy/Paste vs Paste New, nested Browser tree with visibility and isolate; Ground, Move/Copy of occurrences, joints (rigid, revolute, slider, cylindrical, pin-slot, planar, ball) by joint origins with limits and Drive Joints, closed kinematic loops (four-bar, slider-crank: the loop's other joints follow the driven one on its branch, and driving stops where a loop can no longer close), cams (`joint.cam`: a revolute cam drives a slider or revolute follower along a closed sketch profile or the cam's edges, knife, roller or flat followers, worked out again when the profile changes; drives, studies, closed loops, contact sets), As-built Joint, Rigid Group, Contact Sets (driving and motion studies stop where bodies in a set would pass through each other), Motion Study (joint values keyed along a timeline, playback, export of occurrence positions as JSON/CSV), motion analysis (joint values and a point's path charted over a study as value, velocity and acceleration; the parts that collide along a study, with the steps where they do), Exploded views (automatic or by hand, shown without changing placements, and exported as an animation coming apart and back together); interference, per-component physical properties; STEP with assembly structure; URDF export for robot simulators (links with meshes, mass and inertia; joint chains whose values match Drive Joints; docs/urdf.md). Physical properties now measure material-aware component/occurrence placements, descendants and repeated instances, including pending moves and body reassignment offsets; contact geometry and automatic exploded centres respect those offsets. Groundwork done: component tree, occurrences with transforms (instances, Paste New), world placement, active component as authoring frame, ground, Capture/Revert Position, moving bodies and sketches. UI: ASSEMBLE panel dialogs for New Component, Joint (snaps on faces, edges, circles and vertices; animated motion preview; offsets, flip, limits), As-built Joint, Joint Origin, Rigid Group, Drive Joints (live slider), Motion Link, Cam and Interference (overlaps shown red); joints in the timeline and the Browser | in progress | 32 |
 | M10 | Sheet metal: flange (base, edge, contour), hem, unfold/refold, convert, flat pattern + DXF, rules: done. PLASTIC enclosure subset: Boss, Rib, Web, Lip/Groove, Snap Fit, Rest, Plastic Rules (library, edit, assign; rule draft and clearance as feature defaults): done, tested against hand-computed geometry. UI: SHEET METAL and PLASTIC tabs with dialogs (live preview, Edit Feature, pre-selection) for Flange, Hem, Unfold/Refold, Convert, Sheet Metal Rules, Create Flat Pattern (flat view with bend lines, bend table CSV/JSON and DXF export with exact circle/arc/line cutouts), Boss, Lip/Groove, Snap Fit, Rest, Manage and Assign Plastic Rules; Fold (bend along a sketch line); flanges meeting at a corner closed at any angle with the rule's gap; edge flanges with their own angle and height per edge in one feature; corner reliefs (notch, round, rectangular, tear) chosen by the rule; Convert to Sheet Metal from a solid or shelled body by its bend edges (flat faces, sharp bends) | in progress | 36 |
 | M11 | 2D drawings | deferred | — |
 | M12 | Release: cross-platform packages, verification and deliberate publication implemented; original current-UI demo refreshed. Trusted distribution signing and broader performance work remain | in progress | 16 |
 | M14 | Configurations: a table of rows (parameter expressions and feature suppressions per row) switched with config.activate (undoable, all or nothing), kept through parameter renames and feature deletes (config.configure, config.table, config.column/row/activate). Per-row body materials and appearances (library looks, custom colour/opacity and clearing overrides), undoable activation and save/reopen: done. Ordered typed configuration rules, atomic validation and structured rule editing: done. Component appearance and certified semantic face style columns, atomic preview/apply and independent-copy remapping: done. Exact constructed sketch-side and immutable imported-face lineage now preserve legacy names and reject retargeting. Left: ambiguous shifted/two-sided caps | in progress | 4 |
 | M13 | Never lose work: atomic saves (temporary file, flush, rename; a crash at any moment leaves the old file or the new one) with the replaced version kept as `<file>.bak`; autosave of unsaved changes to the recovery folder every 5 minutes (preference) and after big operations, only when something changed; "Recover unsaved design?" on the next launch (`doc.recovery_list`, `doc.recover`, `doc.recovery_discard`); a kill-mid-save test (process killed while saving a 0.5 MB design 25 times). File format: `"format": "solidcraft/12"`, older formats upgraded step by step (`doc::format`), newer ones refused with a message, out-of-range numbers and broken placements refused; a corpus of designs saved by M0, components-era, joints-era and current builds (apps/solidcraft-cli/tests/corpus) that must open and evaluate as saved; damaged and hostile variants (truncation, bit flips, hostile values, removed keys, repeated features, deep nesting) never panic | done | 6 |
+| M15 | Frames and weldments (#4003): structural members along 2D and 3D sketch lines, butt and mitre corners, trim to faces and bodies, end caps, gussets, cosmetic welds and a cut list. Done: the profile library (`frame.profile.list`, `frame.profile.properties`, `frame.profile.insert`): bar, round bar, rectangular and round tube, angle, channel and I-beam, each SolidCraft's own parametric definition with exact fillet arcs and exact section properties (area, centroid, second moments), tested against hand-computed values; members (`frame.member`): one body per straight line of a 2D or 3D frame sketch, following parameter edits, with a built-in profile (its dimensions parameter expressions) or a profile sketch (its drawn material by alternating nested loops), anchor, angle and mirror; each member's name kept with its line. Left: corners, trims, end caps, gussets, welds, cut list, FRAME tab and dialogs | in progress | 60 |

 M6 navigation preferences include **Touchpad**: Shift + pointer movement pans, Alt/Option +
 pointer movement orbits without a mouse button, and vertical scrolling zooms. Other presets
 retain their saved two-finger scroll preference; camera motion is available through
 `view.navigate` and modifier-aware `ui.move` automation.
+With the **Fusion** preset and two-finger pan enabled, two fingers pan and Shift + two fingers
+orbit freely, with pinch zoom and mouse bindings unchanged. The shared navigation handler
+applies the same gestures to model and Render views and blocks orbit on flat pages.

-M11 precursor: File → Export Current View as DXF exports shown placed bodies from the current
+UI redesign (#2016): the File/start view (#2027) uses shared light/dark navigation,
+action tiles, recent rows and sample cards, with recovery review and Save As/Export
+entry points. Document loading, sample caches and recovery safety retain their
+existing command paths.
+
+M11 precursor: File → Export Current View as DXF exports shown placed bodies and sketches from the current
 camera as a 2D millimetre drawing, with hidden edges omitted or dashed. Vector occlusion splits
 partly hidden edges and includes curved silhouettes. Repeated part meshes and triangle
 hierarchies are shared; bounded desktop preparation and occlusion use up to eight workers.
@@ -134,6 +225,12 @@ completed drawings publish atomically. The browser still exports synchronously.

 ## Render foundation

+- Original starter appearances (#1722): 34 opaque recipes through existing commands, with six explicitly unavailable glass recipes and preserved legacy looks; see [the contract](docs/render-starter-appearances.md).
+
+- Bounded linear film accumulation (#1696) supplies caller-admitted mean/variance storage and complete-pass views; actual progressive consumers remain separate. See [the film contract](docs/render-film.md).
+
+- Definition-local visual mapping (#1214) supplies a bounded numerical frame, physical repeat coordinates and a deterministic one-time grain-axis suggestion. It adds no saved record or texture consumer; see [the mapping contract](docs/render-visual-mapping.md).
+
 - Explicit texture normalization (#1218) produces completed float RGBA with
  role-aware linear color/data semantics, bounded matrix/TRC ICC conversion and
  opt-in EXIF orientation. It retains high-precision raw samples and records lossy
@@ -189,6 +286,11 @@ completed drawings publish atomically. The browser still exports synchronously.

 ## Dimensioning and error reporting

+- Operation length fields share design-unit defaults and input evaluation, including secondary
+  distances, thin walls, blend controls, sheet/plastic rules, joints and motion keys. Canvas
+  handles and sketch previews use the same lengths as committed geometry. Existing stored
+  millimetre values retain their size when edited in a design using another unit (#3271).
+
 - MCP `execute` accepts `verbose: false`, sharing the compact reply helper used by
  `batch`: body changes and created sketch IDs stay, while repeated lists are omitted.
  Both tools retain full replies by default.
@@ -232,6 +334,9 @@ completed drawings publish atomically. The browser still exports synchronously.
 - Sketch Dimension takes a line and a circle or arc (#1803): it measures from the line to the
  circle's edge (the gap, 0 when tangent, or how far the edge reaches past a line that cuts
  it), drives it like any other dimension and keeps the circle on its side of the line.
+- Sketch Dimension takes a point and a circle or arc, or two circles or arcs (#4064): it
+  measures to the circle's edge (from the point, or between the two edges: the gap, 0 when
+  they touch, how far they overlap, or the narrowest gap between nested circles).
 - Sketch annotations, live drawing lengths and Measure use document units. Inches show
  three decimals and retain a meaningful fourth digit. Bare length dimension entry captures
  the current design unit; changing units leaves existing geometry and expressions intact.
@@ -329,8 +434,25 @@ completed drawings publish atomically. The browser still exports synchronously.
 - Saved projections from a removed strip retain their geometry and report the lost
  reference. Explicitly reselect the wall to repair that projection.

+## Workspace layouts (#2029)
+
+- General preferences save Floating or Compact using the universal UI containers.
+  Compact joins the workspace selector and ribbon, docks the content-hugging Browser
+  flush beneath them with a square join, and opens tool sheets below the compass.
+  Sheets remain draggable, rounding all corners away from their right dock; footer
+  backgrounds follow the same corners. A separate preference hides ribbon icon labels
+  for a shorter ribbon in either layout.
+  Assistant keeps the outermost edge and History keeps its chosen dock. Switching
+  retains the active tool, camera, selection and design; system windows and menus
+  keep their existing behavior.
+
 ## View navigation

+- Navigation has an opt-in Free orbit preference for mouse and 3D-mouse rotation through
+  both poles with roll. It defaults off, preserving existing preset snapping and pole limits.
+  The SolidWorks face menu offers Normal to Selection (`view.normal_to`), shared with Look At
+  and Ctrl+8, including repeat-to-flip, preserving scale and projection.
+
 - Desktop Ctrl/Cmd +/- and 0 change or reset the saved UI scale. The scale slider keeps
  its layout stable during a drag and applies the selected scale on release.

@@ -561,6 +683,10 @@ completed drawings publish atomically. The browser still exports synchronously.
  continuous collision detection; local thin walls and small details remain limitations.
  See [contact-set limits and recovery](docs/contact-sets.md).

+## Assembly dragging
+
+The design's first part is grounded when it is made, and a left-button drag repositions a free part (`occurrence.drag`: one undo step, exact occurrence paths including repeated jointed definitions, any floating-chain member carries the chain, grounded parts and joints hold where present, Escape cancels).
+
 ## 3D sketch bridges

 3D sketch drawing snaps to points on other visible sketch planes without flattening them onto
@@ -19,10 +19,16 @@ path = "src/main.rs"
 name = "solvecraft-cli"
 path = "src/alias.rs"

+[features]
+default = ["raytrace-cpu"]
+bundled-render-library = ["solidcraft-engine/bundled-render-library"]
+raytrace-cpu = ["solidcraft-engine/raytrace-cpu"]
+
 [dependencies]
 solidcraft-engine = { workspace = true }
 solidcraft-gpu = { workspace = true }
 solidcraft-mcp = { workspace = true }
+log = { workspace = true }
 serde_json = { workspace = true }

 [dev-dependencies]
@@ -0,0 +1,151 @@
+//! Reproducible evidence through the production command/job interfaces.
+//! Usage: studio_evidence RECIPE.json RENDER-PARAMS.json OUTPUT.png
+//! Writes the editable design, command timings and actual adapter/job metadata beside PNG.
+//! Accepts runtime requests as well as inline or named saved render jobs.
+use serde_json::{Value, json};
+use solidcraft_engine::{
+    Session,
+    doc::render_settings::{RenderJob, RenderSetup},
+    render::job::{CpuHost, ErrorCode, JobId, Phase},
+};
+use std::{
+    io::Read,
+    path::Path,
+    time::{Duration, Instant},
+};
+
+fn read_json(path: &str) -> Result<Value, String> {
+    let mut bytes = Vec::new();
+    std::fs::File::open(path).map_err(|e| format!("{path}: {e}"))?.take(16_777_217).read_to_end(&mut bytes).map_err(|e| e.to_string())?;
+    if bytes.len() > 16_777_216 {
+        return Err("evidence input exceeds 16 MiB".into());
+    }
+    serde_json::from_slice(&bytes).map_err(|e| format!("{path}: {e}"))
+}
+
+// Only decide which optional host must be installed. The production command
+// still validates and resolves the actual request without a second wire format.
+fn needs_gpu(session: &Session, params: &Value) -> Result<bool, String> {
+    let inline = params.get("settings").filter(|value| !value.is_null());
+    let named = params.get("setup").filter(|value| !value.is_null());
+    if inline.is_some() && named.is_some() {
+        return Err("choose either setup or settings".into());
+    }
+    let inline_setup = inline
+        .filter(|value| value.get("job").is_some_and(|job| !job.is_null()))
+        .map(|value| serde_json::from_value::<RenderSetup>(value.clone()).map_err(|e| e.to_string()))
+        .transpose()?;
+    let setup = if let Some(name) = named.and_then(Value::as_str) {
+        Some(session.doc.render.setups.get(name).ok_or("no saved render setup with that name")?)
+    } else {
+        inline_setup.as_ref()
+    };
+    if let Some(setup) = setup
+        && let Some(job) = &setup.job
+    {
+        if params.as_object().is_some_and(|object| object.keys().any(|key| !matches!(key.as_str(), "setup" | "settings" | "replace"))) {
+            return Err("saved render jobs cannot be mixed with runtime controls".into());
+        }
+        setup.validate().map_err(|e| e.to_string())?;
+        return Ok(matches!(job, RenderJob::GpuPath { .. }));
+    }
+    Ok(params.get("progressive").and_then(Value::as_bool) == Some(true))
+}
+
+fn run() -> Result<(), String> {
+    let args: Vec<String> = std::env::args().skip(1).collect();
+    let [recipe_path, params_path, output_path] = args.as_slice() else {
+        return Err("usage: studio_evidence RECIPE.json RENDER-PARAMS.json OUTPUT.png".into());
+    };
+    let output = Path::new(output_path);
+    if !output.extension().is_some_and(|e| e.eq_ignore_ascii_case("png")) {
+        return Err("output must have a .png extension".into());
+    }
+    let recipe = read_json(recipe_path)?;
+    let params = read_json(params_path)?;
+    let mut session = Session::default();
+    eprintln!("Generating original CAD scene from {recipe_path}");
+    let generation_start = Instant::now();
+    let (commands, command_timings) = session.run_script_timed(&recipe, false, &mut |_, _| {}).map_err(|e| e.to_string())?;
+    let generation_seconds = generation_start.elapsed().as_secs_f64();
+    let design_path = output.with_extension(solidcraft_engine::io::DESIGN_EXT);
+    session.execute("file.save_as", &json!({"path":design_path})).map_err(|e| e.to_string())?;
+    let scene = solidcraft_engine::product_scene::extract(&session).map_err(|e| e.to_string())?;
+    let bodies: Vec<Value> = scene
+        .meshes
+        .iter()
+        .map(|mesh| json!({"name":mesh.name,"vertices":mesh.mesh.positions.len(),"triangles":mesh.mesh.triangles.len()}))
+        .collect();
+    drop(scene);
+
+    let cpu_host_start = Instant::now();
+    session.set_render_job_host(Some(CpuHost::for_platform().map_err(|e| e.to_string())?)).map_err(|e| e.to_string())?;
+    let cpu_host_seconds = cpu_host_start.elapsed().as_secs_f64();
+    // Match runtime and saved-job dispatch. CPU evidence must not require a
+    // Vulkan device, parse GPU policy or initialize a GPU host.
+    let (adapter_report, gpu_host_seconds) = if needs_gpu(&session, &params)? {
+        let gpu_host_start = Instant::now();
+        let policy = solidcraft_gpu::select::Policy::from_env().map_err(|e| e.to_string())?;
+        let (adapter, report) =
+            solidcraft_gpu::select::pick_path(policy, |_| true).ok_or("no Vulkan or Metal adapter satisfies the requested GPU policy")?;
+        session.register_render_job_host(solidcraft_gpu::path::host_on_adapter(&adapter).map_err(|e| e.to_string())?).map_err(|e| e.to_string())?;
+        (Some(report), Some(gpu_host_start.elapsed().as_secs_f64()))
+    } else {
+        (None, None)
+    };
+    let preflight = session.execute("render.preflight", &params).map_err(|e| e.to_string())?;
+    let start = Instant::now();
+    let started = session.execute("render.start", &params).map_err(|e| e.to_string())?;
+    let executor = started
+        .get("resolved")
+        .and_then(|resolved| resolved.get("executor"))
+        .and_then(Value::as_str)
+        .ok_or("started job did not report the resolved image executor")?
+        .to_owned();
+    let id: JobId = serde_json::from_value(started.get("job").cloned().ok_or("missing job id")?).map_err(|e| e.to_string())?;
+    let handle = session.render_job_handle(id).map_err(|e| e.to_string())?;
+    eprintln!("Rendering through production {executor} executor");
+    if let Some(adapter) = &adapter_report {
+        eprintln!("GPU adapter: {adapter:?}");
+    }
+    let status = loop {
+        match handle.wait_timeout(Duration::from_secs(10)) {
+            Ok(status) => break status,
+            Err(error) if error.code == ErrorCode::TimedOut && start.elapsed() < Duration::from_secs(3600) => {
+                let status = handle.status().map_err(|e| e.to_string())?;
+                eprintln!(
+                    "Render progress: {:?} {}/{} after {:.1}s",
+                    status.progress.phase,
+                    status.progress.done,
+                    status.progress.total,
+                    start.elapsed().as_secs_f64()
+                );
+            }
+            Err(error) => {
+                let _ = handle.cancel();
+                return Err(error.to_string());
+            }
+        }
+    };
+    let render_and_encode_seconds = start.elapsed().as_secs_f64();
+    if status.progress.phase != Phase::Completed {
+        return Err(status.error.map_or_else(|| "render did not complete".into(), |e| e.to_string()));
+    }
+    let exported = session.execute("render.export", &json!({"job":id,"path":output_path,"overwrite":true})).map_err(|e| e.to_string())?;
+    let report = json!({
+        "recipe":recipe_path,"render_params":params,"executor":executor,"adapter":adapter_report,
+        "environment":{"SOLIDCRAFT_GPU":std::env::var("SOLIDCRAFT_GPU").ok(),"WGPU_BACKEND":std::env::var("WGPU_BACKEND").ok()},
+        "cad_generation_seconds":generation_seconds,"cpu_host_setup_seconds":cpu_host_seconds,"gpu_host_setup_seconds":gpu_host_seconds,
+        "render_and_encode_seconds":render_and_encode_seconds,
+        "timing_scope":"wall time from render.start through completed PNG encoding; includes job preparation and readback, excludes CAD generation, preflight and initial CPU/GPU host setup; GPU setup timing includes adapter selection and pipelines when requested",
+        "bodies":bodies,"commands":commands,"command_timings":command_timings,
+        "preflight":preflight,"export":exported,"editable_design":design_path
+    });
+    std::fs::write(output.with_extension("json"), serde_json::to_vec_pretty(&report).map_err(|e| e.to_string())?).map_err(|e| e.to_string())?;
+    println!("{}", serde_json::to_string_pretty(&report).map_err(|e| e.to_string())?);
+    Ok(())
+}
+
+fn main() -> Result<(), String> {
+    run()
+}
@@ -8,7 +8,7 @@
 //! no fixture.
 //!
 //! ```text
-//! solidcraft-cli bench-agent [--scale F] [--script-out script.json] [--save design.solidcraft]
+//! solidcraft-cli bench-agent [--scale F] [--script-out script.json] [--save design.sc]
 //! ```
 //! prints one JSON line per hundred commands (mean and max milliseconds, bodies so far), then the
 //! build total, then the phases `bench-open` prints for the saved design.
@@ -36,8 +36,9 @@ impl Script {
        );
    }

+    /// A part placed after it is built: free, even as the design's first part (#2804).
    fn component(&mut self, name: &str) {
-        self.c("component.create", json!({"name": name}));
+        self.c("component.create", json!({"name": name, "grounded": false}));
    }

    fn root(&mut self) {
@@ -204,7 +205,10 @@ pub fn run(args: &[String]) -> Result<(), String> {
    );
    let path = match flag("--save") {
        Some(p) => p.clone(),
-        None => std::env::temp_dir().join(format!("bench-agent-{}.solidcraft", std::process::id())).to_string_lossy().into_owned(),
+        None => std::env::temp_dir()
+            .join(format!("bench-agent-{}.{}", std::process::id(), solidcraft_engine::io::DESIGN_EXT))
+            .to_string_lossy()
+            .into_owned(),
    };
    s.execute("file.save", &json!({"path": path})).map_err(|e| e.to_string())?;
    let r = crate::cmd_bench_open(std::slice::from_ref(&path));
@@ -0,0 +1,701 @@
+//! `bench-assistant`: the standard Assistant model test (v1, #4851), run against a desktop app.
+//!
+//! The app is already running with `--control PORT`; everything goes through its control channel
+//! (`docs/control-protocol.md`), so the command needs no window code of its own. For each task it
+//! starts a new design, runs the task's prescribed setup (a box, for some), adds the endpoint as an
+//! API agent with All permissions, starts a new chat, sends the prompt once and waits for the turn
+//! to end. The result is checked on the design (`document.inspect` with measurements), never on
+//! what the model says, except for the one question whose answer is the reply. A failed task is
+//! put in one of the issue's failure categories from the conversation's items.
+//!
+//! ```text
+//! solidcraft-cli bench-assistant --connect 127.0.0.1:PORT --base-url URL --model NAME
+//!     [--token T] [--tasks 1,2,5] [--repeat N] [--timeout-s 300]
+//!     [--json out.json] [--markdown out.md]
+//! ```
+//! prints a table of the results; `--markdown` writes the issue's comment template filled in,
+//! `--json` every task's rules, conversation and design before and after.
+
+use std::io::{BufRead, BufReader, Write};
+use std::net::{SocketAddr, TcpStream};
+use std::time::{Duration, Instant};
+
+use serde_json::{Value, json};
+
+/// Standard test v1, as #4851 states it. Changing a prompt or a rule makes it another test.
+const TASKS: &str = r#"[
+  {"id": "01-cube", "prompt": "Make a 20 mm cube.", "check": {"bodies": 1, "volume": 8000, "bbox_size": [20, 20, 20]}},
+  {"id": "02-cylinder", "prompt": "Make a cylinder 30 mm in diameter and 50 mm tall.", "check": {"bodies": 1, "volume": 35342.92, "bbox_size": [30, 30, 50]}},
+  {"id": "03-block", "prompt": "Create a block 60 mm long, 40 mm wide and 10 mm thick.", "check": {"bodies": 1, "volume": 24000, "bbox_size": [10, 40, 60]}},
+  {"id": "04-sketch-extrude", "prompt": "Sketch a 50 by 30 mm rectangle on the XY plane and extrude it 15 mm.", "check": {"bodies": 1, "volume": 22500, "bbox_size": [15, 30, 50], "feature_kinds": ["Extrude"]}},
+  {"id": "05-plate-hole", "prompt": "Make a plate 80 x 60 x 10 mm with a 20 mm diameter hole straight through the middle.", "check": {"bodies": 1, "volume": 44858.41, "bbox_size": [10, 60, 80], "note": "80*60*10 - pi*10^2*10"}},
+  {"id": "06-fillet-box", "prompt": "Round all the edges of the box with a 3 mm radius.", "setup": [{"command": "solid.box", "params": {"length": 40, "width": 40, "height": 40}}], "check": {"bodies": 1, "volume": 63108.53, "tol": 0.003, "feature_kinds": ["Fillet"], "note": "all 12 edges of a 40 mm cube rounded r=3"}},
+  {"id": "07-move-body", "prompt": "Move the box 50 mm along the X axis.", "setup": [{"command": "solid.box", "params": {"length": 20, "width": 20, "height": 20}}], "check": {"bodies": 1, "volume": 8000, "bbox_min": [50, 0, 0]}},
+  {"id": "08-rename-body", "prompt": "Rename the body to Bracket.", "setup": [{"command": "solid.box", "params": {"length": 30, "width": 20, "height": 10}}], "check": {"bodies": 1, "volume": 6000, "body_name": "Bracket"}},
+  {"id": "09-volume-question", "prompt": "What is the volume of the part?", "setup": [{"command": "solid.box", "params": {"length": 30, "width": 20, "height": 10}}], "check": {"bodies": 1, "volume": 6000, "unchanged": true, "reply_number": "6[ ,. ]?000(?![0-9])|6(\\.0+)? ?cm"}},
+  {"id": "10-two-holes", "prompt": "Make a 100 x 50 x 5 mm plate and drill two 10 mm holes through it, each 15 mm in from the short ends and centred across the width.", "check": {"bodies": 1, "volume": 24214.6, "bbox_size": [5, 50, 100], "note": "100*50*5 - 2*pi*5^2*5"}},
+  {"id": "11-any-change", "prompt": "can you use the software to make a change to the current shape, any change at all", "setup": [{"command": "solid.box", "params": {"length": 30, "width": 20, "height": 10}}], "check": {"changed": true, "note": "verbatim user prompt from #4846; pass = the design changed"}}
+]"#;
+
+/// The agent the test adds. A fixed id replaces it on every run instead of adding another.
+const AGENT_ID: &str = "api-bench-assistant";
+const AGENT_NAME: &str = "bench";
+/// Longest control reply read (the channel's own request limit).
+const MAX_REPLY: usize = 16 << 20;
+/// Most result data kept for `--json`.
+const MAX_RESULTS: usize = 64 << 20;
+/// Deadline of the requests that only set up or read (each is answered at once by the app).
+const REQUEST_TIMEOUT: Duration = Duration::from_secs(120);
+/// How often a running turn is polled.
+const POLL: Duration = Duration::from_millis(250);
+/// After this long, an idle chat with no reply yet counts as a turn that ended without one.
+const START_GRACE: Duration = Duration::from_secs(30);
+/// Absolute tolerance of the lowest corner, in millimetres.
+const MIN_CORNER_TOL: f64 = 0.05;
+
+/// A JSON-lines connection to the app. Requests are sent once; a lost reply is never retried,
+/// so nothing runs twice.
+struct Control {
+    addr: SocketAddr,
+    token: String,
+    reader: BufReader<TcpStream>,
+    id: u64,
+}
+
+impl Control {
+    fn connect(addr: &str, token: Option<&str>) -> Result<Self, String> {
+        let addr: SocketAddr = addr.parse().map_err(|_| format!("--connect: `{addr}` is not an IP address and port"))?;
+        if !addr.ip().is_loopback() || addr.port() == 0 {
+            return Err("--connect requires a loopback address and a nonzero port (the app listens on 127.0.0.1)".into());
+        }
+        let token = solidcraft_engine::control_auth::client_token(addr.port(), token)
+            .map(|t| t.token)
+            .ok_or("no control token: pass --token, set SOLIDCRAFT_CONTROL_TOKEN, or run on the app's computer (its token file)")?;
+        if token.len() > 4096 {
+            return Err("the control token is longer than 4096 bytes".into());
+        }
+        Self::open(addr, token)
+    }
+
+    fn open(addr: SocketAddr, token: String) -> Result<Self, String> {
+        let stream = TcpStream::connect_timeout(&addr, Duration::from_secs(5)).map_err(|e| format!("connecting to {addr}: {e}"))?;
+        Ok(Self { addr, token, reader: BufReader::new(stream), id: 0 })
+    }
+
+    /// A new connection to the same app: a request that outlived its deadline keeps the old one
+    /// busy until it is answered.
+    fn reopen(&self) -> Result<Self, String> {
+        Self::open(self.addr, self.token.clone())
+    }
+
+    fn call(&mut self, method: &str, params: Value, deadline: Instant) -> Result<Value, String> {
+        let left = || deadline.checked_duration_since(Instant::now()).filter(|d| !d.is_zero()).ok_or_else(|| "timeout".to_string());
+        let io = |e: std::io::Error| match e.kind() {
+            std::io::ErrorKind::TimedOut | std::io::ErrorKind::WouldBlock => "timeout".to_string(),
+            _ => format!("control channel: {e}"),
+        };
+        self.reader.get_ref().set_write_timeout(Some(left()?)).map_err(io)?;
+        self.id += 1;
+        // The first request on a connection carries the token; sending it on every one is allowed.
+        let request = json!({"id": self.id, "method": method, "params": params, "token": self.token});
+        writeln!(self.reader.get_mut(), "{request}").map_err(io)?;
+        let mut line = Vec::new();
+        loop {
+            self.reader.get_ref().set_read_timeout(Some(left()?)).map_err(io)?;
+            let bytes = self.reader.fill_buf().map_err(io)?;
+            if bytes.is_empty() {
+                return Err("the app closed the control connection".into());
+            }
+            let newline = bytes.iter().position(|b| *b == b'\n');
+            let used = newline.map_or(bytes.len(), |n| n + 1);
+            if line.len() + used > MAX_REPLY {
+                return Err("a control reply is larger than 16 MiB".into());
+            }
+            line.extend_from_slice(bytes.get(..used).unwrap_or_default());
+            self.reader.consume(used);
+            if newline.is_some() {
+                break;
+            }
+        }
+        let reply: Value = serde_json::from_slice(&line).map_err(|e| format!("control reply: {e}"))?;
+        if reply["id"].as_u64() != Some(self.id) {
+            return Err("control reply for another request".into());
+        }
+        if reply["ok"] != true {
+            return Err(format!("{method}: {}", reply["error"].as_str().unwrap_or("failed")));
+        }
+        reply.get("result").cloned().ok_or_else(|| format!("{method}: reply without a result"))
+    }
+
+    fn execute(&mut self, command: &str, params: Value) -> Result<Value, String> {
+        self.call("engine.execute", json!({"command": command, "params": params, "animate": false}), Instant::now() + REQUEST_TIMEOUT)
+    }
+
+    fn chat(&mut self, params: Value) -> Result<Value, String> {
+        self.call("ui.agent_chat", params, Instant::now() + REQUEST_TIMEOUT)
+    }
+
+    fn inspect(&mut self) -> Result<Value, String> {
+        let design = self.call("document.inspect", json!({"measure": true}), Instant::now() + REQUEST_TIMEOUT)?;
+        if design.is_object() { Ok(design) } else { Err("document.inspect returned no design".into()) }
+    }
+}
+
+fn tasks() -> Result<Vec<Value>, String> {
+    serde_json::from_str(TASKS).map_err(|e| format!("embedded tasks: {e}"))
+}
+
+fn triple(value: &Value) -> Option<[f64; 3]> {
+    match value.as_array()?.as_slice() {
+        [x, y, z] => {
+            let n = |v: &Value| v.as_f64().filter(|n| n.is_finite());
+            Some([n(x)?, n(y)?, n(z)?])
+        }
+        _ => None,
+    }
+}
+
+/// What the model said (thoughts left out).
+fn reply(items: &[Value]) -> String {
+    items.iter().filter(|i| i["thought"] != true).filter_map(|i| i["agent"].as_str()).collect::<Vec<_>>().join("\n")
+}
+
+/// v1's reply pattern `6[ ,. ]?000(?![0-9])|6(\.0+)? ?cm`: "6000", "6 000", "6,000", "6.000" not
+/// followed by a digit, or "6 cm", "6.0cm", … (a narrow no-break space also separates thousands).
+fn volume_reply(text: &str) -> bool {
+    text.match_indices('6').any(|(at, _)| {
+        let tail = text.get(at + 1..).unwrap_or_default();
+        let thousands = |t: &str| t.strip_prefix("000").is_some_and(|rest| !rest.starts_with(|c: char| c.is_ascii_digit()));
+        let separated = tail.strip_prefix([' ', ',', '.', '\u{202f}']).is_some_and(thousands);
+        let cm = {
+            let t = tail.strip_prefix(".0").map_or(tail, |t| t.trim_start_matches('0'));
+            t.strip_prefix(' ').unwrap_or(t).starts_with("cm")
+        };
+        thousands(tail) || separated || cm
+    })
+}
+
+/// The design as the user sees it, without what reading or saving changes (path, saved state,
+/// revision, selection, undo depth, evaluation timings).
+fn content(design: &Value) -> Value {
+    let mut v = design.clone();
+    if let Some(o) = v.as_object_mut() {
+        for key in ["path", "dirty", "revision", "selection", "undo", "redo"] {
+            o.remove(key);
+        }
+    }
+    for feature in v.get_mut("timeline").and_then(Value::as_array_mut).into_iter().flatten() {
+        if let Some(o) = feature.as_object_mut() {
+            o.remove("ms");
+            o.remove("boolean_diagnostics");
+        }
+    }
+    v
+}
+
+/// Whether the design changed: its content, or a step on the undo stack (a colour, say, that the
+/// inspection does not list).
+fn changed(before: &Value, after: &Value) -> bool {
+    content(before) != content(after) || after["undo"].as_u64() > before["undo"].as_u64()
+}
+
+/// The rules a task's result breaks (none: it passed). `before` and `after` are
+/// `document.inspect {measure: true}` before the prompt and after the turn.
+pub(super) fn check(rule: &Value, before: &Value, after: &Value, items: &[Value]) -> Vec<String> {
+    let Some(all) = after["bodies"].as_array() else { return vec!["the design could not be read".into()] };
+    // Bodies the user sees; a hidden one (a tool body, a hidden original) is not the result.
+    let bodies: Vec<&Value> = all.iter().filter(|b| b["visible"] != false).collect();
+    let mut errors = Vec::new();
+    if let Some(n) = rule["bodies"].as_u64()
+        && bodies.len() as u64 != n
+    {
+        errors.push(format!("{} bodies, expected {n}", bodies.len()));
+    }
+    if let Some(expected) = rule["volume"].as_f64() {
+        let tol = rule["tol"].as_f64().unwrap_or(0.01);
+        let volumes: Vec<f64> = bodies.iter().filter_map(|b| b["volume_mm3"].as_f64()).filter(|v| v.is_finite()).collect();
+        let total: f64 = volumes.iter().sum();
+        if volumes.len() != bodies.len() || (total - expected).abs() > expected * tol {
+            errors.push(format!("volume {total:.1} mm³, expected {expected} mm³ ±{}%", tol * 100.0));
+        }
+    }
+    let first = bodies.first().copied().unwrap_or(&Value::Null);
+    let min = triple(&first["bbox"]["min"]);
+    if let Some(mut expected) = triple(&rule["bbox_size"]) {
+        expected.sort_by(f64::total_cmp);
+        let size = min.zip(triple(&first["bbox"]["max"])).map(|(lo, hi)| {
+            let mut size = [hi[0] - lo[0], hi[1] - lo[1], hi[2] - lo[2]];
+            size.sort_by(f64::total_cmp);
+            size
+        });
+        if !size.is_some_and(|s| s.iter().zip(expected).all(|(a, e)| (a - e).abs() <= 0.01 * e.max(1.0))) {
+            errors.push(format!("size {size:?}, expected {expected:?} in any orientation"));
+        }
+    }
+    if let Some(expected) = triple(&rule["bbox_min"])
+        && !min.is_some_and(|m| m.iter().zip(expected).all(|(a, e)| (a - e).abs() <= MIN_CORNER_TOL))
+    {
+        errors.push(format!("lowest corner {min:?}, expected {expected:?}"));
+    }
+    if let Some(name) = rule["body_name"].as_str()
+        && !bodies.iter().any(|b| b["name"] == name)
+    {
+        errors.push(format!("no body named {name}"));
+    }
+    for kind in rule["feature_kinds"].as_array().into_iter().flatten().filter_map(Value::as_str) {
+        let live = |f: &&Value| f["suppressed"] != true && f["rolled_back"] != true && f["error"].is_null();
+        if !after["timeline"].as_array().into_iter().flatten().filter(live).any(|f| f["type"].as_str().is_some_and(|t| t.contains(kind))) {
+            errors.push(format!("no {kind} in the timeline"));
+        }
+    }
+    if rule["changed"] == true || rule["unchanged"] == true {
+        let changed = before.is_object() && changed(before, after);
+        if rule["changed"] == true && !changed {
+            errors.push("the design did not change".into());
+        }
+        if rule["unchanged"] == true && (changed || !before.is_object()) {
+            errors.push("the design changed".into());
+        }
+    }
+    if rule["reply_number"].is_string() && !volume_reply(&reply(items)) {
+        errors.push("the reply does not give the volume".into());
+    }
+    errors
+}
+
+/// A tool call written into the reply as JSON: `{"name": …`, `{"command": …`, `{"function": …`,
+/// `{"tool": …`.
+fn call_as_text(text: &str) -> bool {
+    text.match_indices('{').any(|(at, _)| {
+        let rest = text.get(at + 1..).unwrap_or_default().trim_start();
+        ["\"name\"", "\"command\"", "\"function\"", "\"tool\""]
+            .iter()
+            .any(|key| rest.strip_prefix(key).is_some_and(|r| r.trim_start().starts_with(':')))
+    })
+}
+
+/// How a failed task failed, in the issue's words, from the conversation's items.
+pub(super) fn classify(items: &[Value], timed_out: bool) -> &'static str {
+    if timed_out {
+        return "timeout";
+    }
+    let tools: Vec<&Value> = items.iter().filter(|i| i.get("tool").is_some()).collect();
+    // A failed call, or a batch whose answer reports a failed step (`"ok": false`).
+    let failed: Vec<String> = tools
+        .iter()
+        .map(|t| t["output"].as_str().unwrap_or_default())
+        .zip(&tools)
+        .filter(|(output, t)| t["status"] == "Failed" || serde_json::from_str::<Value>(output).is_ok_and(|v| v["ok"] == false))
+        .map(|(output, _)| output.to_lowercase())
+        .collect();
+    let notices: Vec<String> = items.iter().filter_map(|i| i["notice"].as_str()).map(str::to_lowercase).collect();
+    let answer = reply(items);
+    if notices.iter().any(|n| n.contains("http 400")) {
+        return "the endpoint refused tools (HTTP 400)";
+    }
+    if notices.iter().any(|n| n.contains("max_turn_requests")) || answer.contains("requests for one message") {
+        return "hit the request limit";
+    }
+    if call_as_text(&answer) {
+        return "wrote the call as text";
+    }
+    if failed.iter().any(|o| o.contains("unknown command") || o.starts_with("unknown tool")) {
+        return "wrong or unknown command";
+    }
+    if failed.iter().any(|o| o.contains("invalid parameters") || o.starts_with("not run:") || o.contains("not valid json")) {
+        return "wrong arguments";
+    }
+    if !failed.is_empty() || notices.iter().any(|n| n.starts_with("http ")) || items.iter().any(|i| i["error"] == true) {
+        return "gave up after errors";
+    }
+    if tools.is_empty() {
+        return if answer.trim().is_empty() { "an empty reply" } else { "only talked" };
+    }
+    "wrong result"
+}
+
+/// One run's results in the issue's comment template (`run`: which repetition).
+pub(super) fn markdown(model: &str, version: &str, results: &[Value], run: u64) -> String {
+    let clean = |s: &str| s.replace(['\n', '\r', '|'], " ");
+    let rows: Vec<&Value> = results.iter().filter(|r| r["repeat"] == run).collect();
+    let passed = rows.iter().filter(|r| r["passed"] == true).count();
+    let mut out = format!(
+        "### {} (<quant>, <download size>)\nRuntime: <Ollama/LM Studio/... version>, context <num_ctx if changed>\nSolidCraft: {}\nResult: {passed}/11\n| # | pass/fail | how it failed |\n|---|---|---|\n",
+        clean(model),
+        clean(version)
+    );
+    for n in 1..=11 {
+        match rows.iter().find(|r| r["task"] == n) {
+            Some(r) if r["passed"] == true => out.push_str(&format!("| {n} | pass | |\n")),
+            Some(r) => out.push_str(&format!("| {n} | fail | {} |\n", clean(r["failure"].as_str().unwrap_or_default()))),
+            None => out.push_str(&format!("| {n} | | not run |\n")),
+        }
+    }
+    out.push_str(if rows.len() == 11 {
+        "Notes: <anything odd, e.g. very slow, needed a retry>\n"
+    } else {
+        "Notes: partial run; the tasks marked \"not run\" were left out.\n"
+    });
+    out
+}
+
+fn write(path: &str, text: &str) -> Result<(), String> {
+    solidcraft_engine::io::vfs::write(path, text.as_bytes()).map_err(|e| format!("{path}: {e}"))
+}
+
+struct Options<'a> {
+    connect: &'a str,
+    token: Option<&'a str>,
+    base_url: &'a str,
+    model: &'a str,
+    tasks: Vec<usize>,
+    repeat: u64,
+    timeout: Duration,
+    json: Option<&'a str>,
+    markdown: Option<&'a str>,
+}
+
+fn options(args: &[String]) -> Result<Options<'_>, String> {
+    const FLAGS: [&str; 9] = ["--connect", "--token", "--base-url", "--model", "--tasks", "--repeat", "--timeout-s", "--json", "--markdown"];
+    let mut given = std::collections::BTreeMap::new();
+    let mut args = args.iter();
+    while let Some(flag) = args.next() {
+        let Some(flag) = FLAGS.iter().find(|f| **f == flag.as_str()) else { return Err(format!("unknown bench-assistant option: {flag}")) };
+        let value = args
+            .next()
+            .filter(|v| !v.starts_with("--") && !v.is_empty() && v.len() <= 4096)
+            .ok_or_else(|| format!("{flag} needs a value (at most 4096 bytes)"))?;
+        if given.insert(*flag, value.as_str()).is_some() {
+            return Err(format!("{flag} given twice"));
+        }
+    }
+    let required = |key: &str| given.get(key).copied().ok_or_else(|| format!("bench-assistant needs {key}"));
+    let number = |key: &str, default: u64, max: u64| -> Result<u64, String> {
+        given
+            .get(key)
+            .map_or(Ok(default), |s| s.parse::<u64>().ok().filter(|n| (1..=max).contains(n)).ok_or_else(|| format!("{key} must be 1 to {max}")))
+    };
+    let tasks = match given.get("--tasks") {
+        None => (1..=11).collect(),
+        Some(list) => {
+            let mut tasks = Vec::new();
+            for n in list.split(',') {
+                let n = n
+                    .trim()
+                    .parse::<usize>()
+                    .ok()
+                    .filter(|n| (1..=11).contains(n))
+                    .ok_or("--tasks takes task numbers 1 to 11, separated by commas")?;
+                if tasks.contains(&n) {
+                    return Err(format!("--tasks lists task {n} twice"));
+                }
+                tasks.push(n);
+            }
+            tasks
+        }
+    };
+    Ok(Options {
+        connect: required("--connect")?,
+        token: given.get("--token").copied(),
+        base_url: required("--base-url")?,
+        model: required("--model")?,
+        tasks,
+        repeat: number("--repeat", 1, 100)?,
+        timeout: Duration::from_secs(number("--timeout-s", 300, 3600)?),
+        json: given.get("--json").copied(),
+        markdown: given.get("--markdown").copied(),
+    })
+}
+
+/// Waits for the turn the prompt started to end. Returns the chat's last state and whether the
+/// deadline passed first.
+fn wait_for_turn(control: &mut Control, mut chat: Value, began: Instant, end: Instant) -> Result<(Value, bool), String> {
+    let mut seen_busy = false;
+    loop {
+        let state = chat["state"].as_str().unwrap_or_default();
+        let turn = !chat["turn"].is_null();
+        let queued = chat["pending"].as_array().is_some_and(|p| !p.is_empty());
+        seen_busy |= state == "busy" || turn;
+        let idle = !matches!(state, "busy" | "starting") && !turn && !queued;
+        // A turn can start and end between two polls: then the conversation has its answer.
+        let answered = chat["items"].as_array().into_iter().flatten().any(|i| i.get("user").is_none());
+        if idle && (seen_busy || answered || matches!(state, "exited" | "failed" | "auth" | "off") || began.elapsed() >= START_GRACE) {
+            return Ok((chat, false));
+        }
+        let Some(left) = end.checked_duration_since(Instant::now()).filter(|d| !d.is_zero()) else { return Ok((chat, true)) };
+        std::thread::sleep(POLL.min(left));
+        match control.call("ui.agent_chat", json!({}), end) {
+            Ok(next) => chat = next,
+            Err(e) if e == "timeout" => return Ok((chat, true)),
+            Err(e) => return Err(e),
+        }
+    }
+}
+
+pub fn run(args: &[String]) -> Result<(), String> {
+    let o = options(args)?;
+    let tasks = tasks()?;
+    let mut control = Control::connect(o.connect, o.token)?;
+    let help = control.call("ui.help", json!({}), Instant::now() + REQUEST_TIMEOUT)?;
+    let version = help["version"].as_str().filter(|s| !s.is_empty() && s.len() <= 256).ok_or("the app reported no version")?.to_string();
+    let config = control.chat(json!({
+        "features": true,
+        "add_agent": {"id": AGENT_ID, "name": AGENT_NAME, "kind": "api", "base_url": o.base_url, "model": o.model},
+    }))?;
+    if !config["agents"].as_array().into_iter().flatten().any(|a| a["id"] == AGENT_ID) {
+        return Err("the app did not add the benchmark's agent".into());
+    }
+    // Put the user's permission setting back afterwards.
+    let permissions = config["permissions"].as_str().map(str::to_string);
+    let result = run_tasks(&mut control, &o, &tasks, &version);
+    let _ = control.chat(json!({"stop": true}));
+    if let Some(p) = permissions {
+        let _ = control.chat(json!({"permissions": p}));
+    }
+    result
+}
+
+fn run_tasks(control: &mut Control, o: &Options, tasks: &[Value], version: &str) -> Result<(), String> {
+    let mut results: Vec<Value> = Vec::new();
+    let mut kept = 0;
+    let mut stdout = std::io::stdout().lock();
+    let mut say = |line: String| writeln!(stdout, "{line}").map_err(|e| format!("stdout: {e}"));
+    say(format!("bench-assistant v1: {} on SolidCraft {version}", o.model))?;
+    say("| run | # | task | pass/fail | how it failed | seconds |\n|---|---|---|---|---|---|".into())?;
+    for run in 1..=o.repeat {
+        for &n in &o.tasks {
+            let task = tasks.get(n - 1).ok_or("missing embedded task")?;
+            // A fresh design and a fresh chat, with nothing of the last task still running.
+            control.chat(json!({"stop": true}))?;
+            control.execute("file.new", json!({"name": "Benchmark"}))?;
+            for step in task["setup"].as_array().into_iter().flatten() {
+                control.execute(step["command"].as_str().ok_or("embedded setup without a command")?, step["params"].clone())?;
+            }
+            control.chat(json!({"agent": AGENT_ID, "permissions": "all", "new_chat": true, "attach_view": false}))?;
+            let before = control.inspect()?;
+            let began = Instant::now();
+            let end = began + o.timeout;
+            let (chat, timed_out) = match control.call("ui.agent_chat", json!({"send": task["prompt"]}), end) {
+                Ok(chat) => wait_for_turn(control, chat, began, end)?,
+                Err(e) if e == "timeout" => (json!({}), true),
+                Err(e) => return Err(e),
+            };
+            if timed_out {
+                // The late reply would arrive on the old connection; stop the model on a new one
+                // before reading the design.
+                *control = control.reopen()?;
+            }
+            // Stop the agent before reading the result, so nothing changes the design meanwhile.
+            let stopped = control.chat(json!({"stop": true}))?;
+            let items = stopped["items"].as_array().or(chat["items"].as_array()).cloned().unwrap_or_default();
+            let after = control.inspect()?;
+            let failed_rules = check(&task["check"], &before, &after, &items);
+            let passed = failed_rules.is_empty();
+            let failure = if passed { "" } else { classify(&items, timed_out) };
+            let seconds = began.elapsed().as_secs_f64();
+            say(format!(
+                "| {run} | {n} | {} | {} | {failure} | {seconds:.0} |",
+                task["id"].as_str().unwrap_or_default(),
+                if passed { "pass" } else { "fail" }
+            ))?;
+            let result = json!({
+                "task": n, "id": task["id"], "prompt": task["prompt"], "repeat": run, "passed": passed, "failure": failure,
+                "failed_rules": failed_rules, "timed_out": timed_out, "seconds": seconds, "check": task["check"],
+                "items": items, "before": before, "after": after,
+            });
+            kept += result.to_string().len();
+            if kept > MAX_RESULTS {
+                return Err("the results passed 64 MiB; run fewer tasks or repetitions".into());
+            }
+            results.push(result);
+            // Written after every task, so an interrupted run keeps what it measured.
+            if let Some(path) = o.json {
+                let all = json!({"test": "v1", "model": o.model, "base_url": o.base_url, "solidcraft": version, "results": results});
+                write(path, &serde_json::to_string_pretty(&all).map_err(|e| e.to_string())?)?;
+            }
+            if let Some(path) = o.markdown {
+                write(path, &(1..=run).map(|r| markdown(o.model, version, &results, r)).collect::<Vec<_>>().join("\n"))?;
+            }
+        }
+    }
+    for run in 1..=o.repeat {
+        let rows: Vec<&Value> = results.iter().filter(|r| r["repeat"] == run).collect();
+        say(format!("run {run}: {}/{} passed", rows.iter().filter(|r| r["passed"] == true).count(), rows.len()))?;
+    }
+    Ok(())
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn design(bodies: Value, timeline: Value) -> Value {
+        json!({"name": "Benchmark", "params": [], "timeline": timeline, "bodies": bodies, "sketches": [], "undo": 1, "revision": 3, "dirty": true})
+    }
+
+    fn body(name: &str, volume: f64, min: [f64; 3], max: [f64; 3]) -> Value {
+        json!({"name": name, "volume_mm3": volume, "bbox": {"min": min, "max": max}, "visible": true})
+    }
+
+    #[test]
+    fn the_embedded_tasks_are_v1() {
+        let tasks = tasks().unwrap();
+        assert_eq!(tasks.len(), 11);
+        assert_eq!(tasks[0]["prompt"], "Make a 20 mm cube.");
+        assert_eq!(tasks[10]["prompt"], "can you use the software to make a change to the current shape, any change at all");
+        assert_eq!(tasks[5]["check"]["tol"], 0.003);
+        assert_eq!(tasks[6]["check"]["bbox_min"], json!([50, 0, 0]));
+        let boxes: Vec<_> = tasks.iter().filter(|t| t["setup"].is_array()).map(|t| t["id"].as_str().unwrap()).collect();
+        assert_eq!(boxes, ["06-fillet-box", "07-move-body", "08-rename-body", "09-volume-question", "11-any-change"]);
+    }
+
+    #[test]
+    fn pass_rules() {
+        let tasks = tasks().unwrap();
+        let rule = |n: usize| tasks[n - 1]["check"].clone();
+        let empty = design(json!([]), json!([]));
+        let pass = |n: usize, before: &Value, after: &Value, items: &[Value]| check(&rule(n), before, after, items);
+        // 3: any orientation, within 1%.
+        let block = design(json!([body("Body1", 24_100.0, [0.0; 3], [40.0, 10.0, 60.2])]), json!([{"type": "Box"}]));
+        assert!(pass(3, &empty, &block, &[]).is_empty());
+        let thick = design(json!([body("Body1", 24_000.0, [0.0; 3], [40.0, 12.0, 60.0])]), json!([]));
+        assert_eq!(pass(3, &empty, &thick, &[]).len(), 1);
+        let two = design(json!([body("A", 12_000.0, [0.0; 3], [60.0, 40.0, 5.0]), body("B", 12_000.0, [0.0; 3], [60.0, 40.0, 5.0])]), json!([]));
+        assert!(!pass(3, &empty, &two, &[]).is_empty());
+        // A hidden body is not part of the result.
+        let mut hidden = two.clone();
+        hidden["bodies"][1]["visible"] = json!(false);
+        hidden["bodies"][0]["volume_mm3"] = json!(24_000.0);
+        hidden["bodies"][0]["bbox"]["max"] = json!([60.0, 40.0, 10.0]);
+        assert!(pass(3, &empty, &hidden, &[]).is_empty());
+        // 4: the timeline needs a working Extrude.
+        let plate = |kind: Value| design(json!([body("Body1", 22_500.0, [0.0; 3], [50.0, 30.0, 15.0])]), kind);
+        assert!(pass(4, &empty, &plate(json!([{"type": "Sketch"}, {"type": "Extrude"}])), &[]).is_empty());
+        assert!(!pass(4, &empty, &plate(json!([{"type": "Box"}])), &[]).is_empty());
+        for flag in [json!({"suppressed": true}), json!({"rolled_back": true}), json!({"error": "failed"})] {
+            let mut feature = json!({"type": "Extrude"});
+            feature.as_object_mut().unwrap().extend(flag.as_object().unwrap().clone());
+            assert!(!pass(4, &empty, &plate(json!([feature])), &[]).is_empty(), "{flag}");
+        }
+        // 6: the fillet's tolerance is 0.3%.
+        let start = design(json!([body("Body1", 64_000.0, [0.0; 3], [40.0; 3])]), json!([{"type": "Box"}]));
+        let filleted = |v: f64| design(json!([body("Body1", v, [0.0; 3], [40.0; 3])]), json!([{"type": "Box"}, {"type": "Fillet"}]));
+        assert!(pass(6, &start, &filleted(63_108.53 * 1.002), &[]).is_empty());
+        assert!(!pass(6, &start, &filleted(63_108.53 * 1.004), &[]).is_empty());
+        // 7: the lowest corner.
+        let moved = |x: f64| design(json!([body("Body1", 8000.0, [x, 0.0, 0.0], [x + 20.0, 20.0, 20.0])]), json!([]));
+        assert!(pass(7, &empty, &moved(50.0), &[]).is_empty());
+        assert!(!pass(7, &empty, &moved(0.0), &[]).is_empty());
+        // 8: the name.
+        let named = |name: &str| design(json!([body(name, 6000.0, [0.0; 3], [30.0, 20.0, 10.0])]), json!([]));
+        assert!(pass(8, &empty, &named("Bracket"), &[]).is_empty());
+        assert!(!pass(8, &empty, &named("Body1"), &[]).is_empty());
+        // 9: unchanged, and the reply gives the volume.
+        let start = named("Body1");
+        let said = |text: &str| [json!({"user": "What is the volume of the part?"}), json!({"agent": text, "thought": false})];
+        let mut read = start.clone();
+        read["revision"] = json!(7);
+        read["dirty"] = json!(false);
+        read["selection"] = json!([{"body": "Body1"}]);
+        assert!(pass(9, &start, &read, &said("The volume is 6000 mm³.")).is_empty());
+        assert!(!pass(9, &start, &read, &said("About 60 cm³.")).is_empty());
+        assert!(!pass(9, &start, &named("Bracket"), &said("6 000 mm³")).is_empty());
+        let mut undone = start.clone();
+        undone["undo"] = json!(2);
+        assert!(!pass(9, &start, &undone, &said("6000 mm³")).is_empty());
+        // 11: any change counts; reading does not.
+        assert!(pass(11, &start, &named("Bracket"), &[]).is_empty());
+        assert!(pass(11, &start, &undone, &[]).is_empty());
+        assert!(!pass(11, &start, &read, &[]).is_empty());
+        // An unreadable design passes nothing.
+        assert!(!pass(11, &start, &json!({}), &[]).is_empty());
+    }
+
+    #[test]
+    fn the_volume_reply() {
+        for yes in ["6000", "6 000 mm³", "6,000", "6.000", "6\u{202f}000", "6 cm³", "6.00cm3", "is 6000."] {
+            assert!(volume_reply(yes), "{yes}");
+        }
+        for no in ["60000", "6,0001", "60 cm³", "600", "6.01 cm³", ""] {
+            assert!(!volume_reply(no), "{no}");
+        }
+    }
+
+    #[test]
+    fn failure_categories() {
+        for (items, expected) in [
+            (
+                json!([{"user": "Make a 20 mm cube."}, {"agent": "{\"name\": \"execute\", \"arguments\": {}}", "thought": false}]),
+                "wrote the call as text",
+            ),
+            (
+                json!([{"notice": "HTTP 400: registry.ollama.ai/library/gemma3:4b does not support tools", "error": true}]),
+                "the endpoint refused tools (HTTP 400)",
+            ),
+            (json!([{"user": "Make a 20 mm cube."}, {"agent": "", "thought": false}]), "an empty reply"),
+            (json!([{"agent": "Let me think", "thought": true}]), "an empty reply"),
+            (json!([{"agent": "Sure, here is how to make a cube.", "thought": false}]), "only talked"),
+            (
+                json!([{"tool": "1", "status": "Failed", "output": "unknown command `solid.cube` (did you mean `solid.box`?)"}]),
+                "wrong or unknown command",
+            ),
+            (json!([{"tool": "1", "status": "Failed", "output": "unknown tool `make_cube`"}]), "wrong or unknown command"),
+            (json!([{"tool": "1", "status": "Failed", "output": "invalid parameters for `solid.box`: `length` is required"}]), "wrong arguments"),
+            (json!([{"tool": "1", "status": "Failed", "output": "Not run: the tool arguments were not valid JSON"}]), "wrong arguments"),
+            (json!([{"tool": "1", "status": "Failed", "output": "no body `Box`"}]), "gave up after errors"),
+            (
+                json!([{"tool": "1", "status": "Completed", "output": "{\"ok\": false, \"failed\": {\"error\": \"unknown command `solid.delete`\"}}"}]),
+                "wrong or unknown command",
+            ),
+            (
+                json!([{"tool": "1", "status": "Completed"}, {"agent": "\n(stopped after 24 requests for one message; send another message to go on)"}]),
+                "hit the request limit",
+            ),
+            (json!([{"tool": "1", "status": "Completed", "output": "{}"}]), "wrong result"),
+        ] {
+            let items = items.as_array().unwrap();
+            assert_eq!(classify(items, false), expected, "{items:?}");
+            assert_eq!(classify(items, true), "timeout");
+        }
+    }
+
+    #[test]
+    fn markdown_is_the_comment_template() {
+        let rows: Vec<Value> =
+            (1..=11).map(|n| json!({"task": n, "repeat": 1, "passed": n != 2, "failure": if n == 2 { "an empty reply" } else { "" }})).collect();
+        let report = markdown("qwen2.5:7b", "0.19.0", &rows, 1);
+        assert!(report.starts_with(
+            "### qwen2.5:7b (<quant>, <download size>)\nRuntime: <Ollama/LM Studio/... version>, context <num_ctx if changed>\nSolidCraft: 0.19.0\nResult: 10/11\n| # | pass/fail | how it failed |\n|---|---|---|\n| 1 | pass | |\n| 2 | fail | an empty reply |\n"
+        ));
+        assert!(report.ends_with("| 11 | pass | |\nNotes: <anything odd, e.g. very slow, needed a retry>\n"));
+        let partial = markdown("m|x", "v", &rows[..1], 1);
+        assert!(partial.starts_with("### m x ("));
+        assert!(partial.contains("Result: 1/11") && partial.contains("| 2 | | not run |") && partial.contains("partial run"));
+    }
+
+    #[test]
+    fn options_are_checked_before_connecting() {
+        for extra in [
+            &["--repeat", "0"][..],
+            &["--repeat", "101"],
+            &["--timeout-s", "3601"],
+            &["--tasks", "0"],
+            &["--tasks", "12"],
+            &["--tasks", "1,1"],
+            &["--model", "again"],
+            &["--unexpected", "1"],
+            &["--token"],
+        ] {
+            let mut args: Vec<String> =
+                ["--connect", "127.0.0.1:9", "--model", "m", "--base-url", "http://127.0.0.1:11434/v1"].iter().map(|s| s.to_string()).collect();
+            args.extend(extra.iter().map(|s| s.to_string()));
+            assert!(options(&args).is_err(), "{extra:?}");
+        }
+        let args: Vec<String> =
+            ["--connect", "127.0.0.1:9", "--model", "m", "--base-url", "u", "--tasks", "2, 5"].iter().map(|s| s.to_string()).collect();
+        let o = options(&args).unwrap();
+        assert_eq!((o.tasks, o.repeat, o.timeout), (vec![2, 5], 1, Duration::from_secs(300)));
+        assert!(Control::connect("10.0.0.1:9271", Some("t")).is_err());
+        assert!(Control::connect("localhost", Some("t")).is_err());
+    }
+}
@@ -6,11 +6,14 @@ use std::sync::Mutex;
 use serde_json::{Value, json};
 use solidcraft_engine::crash;

-const USAGE: &str = "usage: solidcraft-cli crashes [list [--json] | show <id> | replay <id> | dir | clear [<id>]]";
+/// The command's usage, from the same lines the top-level usage lists.
+fn usage() -> String {
+    crate::command_usage("crashes")
+}

 pub fn run(args: &[String]) -> Result<(), String> {
    let dir = crash::default_dir().ok_or("no crash folder on this system")?;
-    let id = || args.get(1).map(String::as_str).ok_or_else(|| USAGE.to_string());
+    let id = || args.get(1).map(String::as_str).ok_or_else(usage);
    match args.first().map(String::as_str) {
        None | Some("list") => {
            let reports = crash::list(&dir);
@@ -43,7 +46,7 @@ pub fn run(args: &[String]) -> Result<(), String> {
            println!("deleted {} report(s)", crash::clear(&dir, args.get(1).map(String::as_str)));
            Ok(())
        }
-        _ => Err(USAGE.to_string()),
+        _ => Err(usage()),
    }
 }

@@ -16,9 +16,16 @@ fn flag<T: std::str::FromStr>(args: &[String], name: &str, default: T) -> T {
    args.iter().position(|a| a == name).and_then(|i| args.get(i + 1)).and_then(|v| v.parse().ok()).unwrap_or(default)
 }

+/// The options `fuzz` takes, and the ones that stand alone.
+const OPTIONS: &[&str] = &["--from", "--count", "--jobs", "--timeout", "--steps", "--out", "--report"];
+const SWITCHES: &[&str] = &["--minimise"];
+
 /// One seed: a design and a boolean case, as JSON on stdout (progress on stderr).
 pub fn one(args: &[String]) -> Result<(), String> {
    let seed: u64 = args.first().and_then(|s| s.parse().ok()).ok_or("fuzz-one <seed> [--steps N] [--minimise]")?;
+    // The seed is the first argument; the rest are options, and an option `fuzz-one` doesn't
+    // take is refused rather than ignored.
+    crate::known_args("fuzz-one", &args[1..], &["--steps"], SWITCHES, false)?;
    let steps = flag(args, "--steps", 8usize);
    let minimise = args.iter().any(|a| a == "--minimise");
    // Panics caught inside the kernel: harmless natively, fatal in the web build.
@@ -64,6 +71,9 @@ struct Job {
 /// Run seeds `--from`…`--from + --count` in `--jobs` processes, `--timeout` seconds each;
 /// write failing scripts to `--out` and a summary to `--report`.
 pub fn run(args: &[String]) -> Result<(), String> {
+    // An option `fuzz` doesn't take is refused before a seed runs: it would otherwise be
+    // ignored, and the run would go on for minutes with the wrong settings.
+    crate::known_args("fuzz", args, OPTIONS, SWITCHES, false)?;
    let from = flag(args, "--from", 0u64);
    let count = flag(args, "--count", 100u64);
    let last = from.checked_add(count.saturating_sub(1)).ok_or("seed range exceeds u64::MAX: reduce --from or --count")?;
@@ -0,0 +1,49 @@
+//! What the engine logs (`log::info!`, `log::debug!`: why a body has no display plan, why a save
+//! left its model cache out), written to stderr. Off unless asked for, so the CLI's output and
+//! the scripts reading it stay as they are: `--debug` shows SolidCraft's own debug messages (and
+//! other crates' warnings, whose debug output is large), `RUST_LOG=error|warn|info|debug|trace`
+//! sets one level for every crate.
+
+use log::{LevelFilter, Log, Metadata, Record};
+
+struct Stderr {
+    /// The level for SolidCraft's crates.
+    ours: LevelFilter,
+    /// The level for every other crate.
+    others: LevelFilter,
+}
+
+impl Log for Stderr {
+    fn enabled(&self, m: &Metadata) -> bool {
+        m.level() <= if m.target().starts_with("solidcraft") { self.ours } else { self.others }
+    }
+
+    fn log(&self, r: &Record) {
+        if self.enabled(r.metadata()) {
+            use std::io::Write as _;
+            // A closed stderr is no reason to stop.
+            let _ = writeln!(std::io::stderr().lock(), "[{} {}] {}", r.level().as_str().to_ascii_lowercase(), r.target(), r.args());
+        }
+    }
+
+    fn flush(&self) {}
+}
+
+/// Removes `--debug` from `args`, wherever it is (every subcommand takes it), and installs the
+/// logger when it or `RUST_LOG` asks for one.
+pub fn init(args: &mut Vec<String>) {
+    let before = args.len();
+    args.retain(|a| a != "--debug");
+    let debug = args.len() != before;
+    let env = std::env::var("RUST_LOG").ok().and_then(|v| v.trim().parse::<LevelFilter>().ok());
+    let (ours, others) = match (debug, env) {
+        (false, Some(all)) => (all, all),
+        (true, Some(all)) => (all.max(LevelFilter::Debug), all),
+        (true, None) => (LevelFilter::Debug, LevelFilter::Warn),
+        (false, None) => return,
+    };
+    // Installed once, for the life of the process.
+    if log::set_logger(Box::leak(Box::new(Stderr { ours, others }))).is_ok() {
+        log::set_max_level(ours.max(others));
+    }
+}
@@ -1,29 +1,39 @@
 //! SolidCraft headless command line.
 //!
 //! ```text
-//! solidcraft-cli run <script.json|design.solidcraft|part.step|mesh.3mf> [--in design|part.step|mesh.3mf] [--out FILE]... [--save FILE] [--quiet] [--results] [--timings] [--profile] [--json-out FILE] [--allow-errors]
-//! solidcraft-cli eval <script.json|design.solidcraft|part.step> [--json-out FILE] (alias: inspect) measurements as JSON
-//! solidcraft-cli script <design.solidcraft> [--out script.json]     the design's history as a command script
-//! solidcraft-cli bench-open <design.solidcraft | part.step> [--parse-only] [--save OUT.solidcraft] [--display LEVEL [--edit NAME EXPR]] [--ops script.json] loading timings as JSON lines
+//! solidcraft-cli run <script.json|design.sc|part.step|mesh.3mf> [--in design|part.step|mesh.3mf] [--out FILE]... [--save FILE] [--quiet] [--results] [--timings] [--profile] [--json-out FILE] [--allow-errors]
+//!                    [--param-check off|warn|strict]
+//! solidcraft-cli eval <script.json|design.sc|part.step> [--in design.sc|part.step] [--json-out FILE] (alias: inspect) measurements as JSON
+//! solidcraft-cli script <design.sc> [--out script.json]     the design's history as a command script
+//! solidcraft-cli bench-open <design.sc | part.step> [--parse-only] [--save OUT.sc] [--display LEVEL [--edit NAME EXPR]] [--ops script.json] loading timings as JSON lines
 //! solidcraft-cli bench-agent [--scale F] [--save F] [--script-out F] a ~1,300-body design built command by command, timed
+//! solidcraft-cli bench-assistant --connect 127.0.0.1:PORT [--token T] --base-url URL --model NAME [--tasks 1,2,5] [--repeat N]
+//!                                 [--timeout-s 300] [--json out.json] [--markdown out.md]
+//!                                                             the standard Assistant model test (#4851) on a running app
 //! solidcraft-cli snapshot <script|design> [--in design|part.step] --out shot.png [--width W] [--height H] [--view iso|front|top|…|NAME | --camera JSON] [--no-grid] [--no-axes]
 //!                                                             [--body NAME:opacity=0.3,color=#rrggbb]... [--tool NAME]... [--section z=27]
 //! solidcraft-cli exec <command> [json-params]                 run one command on an empty design
 //! solidcraft-cli commands                                     the command registry as JSON
 //! solidcraft-cli recipe <recipe.json>                         translate an oracle recipe to a script
 //! solidcraft-cli oracle <case-dir>...                         replay recipes and compare with expected.json
-//! solidcraft-cli mcp [--in design|script] [--connect HOST:PORT [--token T]] [--allow-path DIR]... [--allow-any-path]
+//! solidcraft-cli mcp [--headless] [--in design|script] [--connect HOST:PORT [--token T]] [--allow-path DIR]... [--allow-any-path]
 //!                    [--param-check off|warn|strict]
 //!                                                             MCP server on stdio (docs/mcp.md)
+//! solidcraft-cli mcp setup [--dry-run] [--client NAME] [--live] (alias: mcp install) add it to OpenCode, Claude Desktop, Claude Code, Cursor
 //! solidcraft-cli licences                                     SolidCraft's licence and the third-party licences
 //! solidcraft-cli icon --out F.png|F.ico [--size N]             the app icon (packaging; drawn, not a file)
+//!
+//! --debug (with any command)                                  SolidCraft's debug log on stderr (or RUST_LOG=LEVEL)
+//! --max-file-size SIZE (with any command)                     read STEP and design files up to SIZE (2GB, 1500MB; at most 16GB)
 //! ```
 #![deny(clippy::unwrap_used, clippy::expect_used, clippy::panic, clippy::unimplemented, clippy::todo, clippy::unreachable)]
 #![forbid(unsafe_code)]

 mod bench_agent;
+mod bench_assistant;
 mod crashes;
 mod fuzz;
+mod logger;
 mod oracle;
 mod preview;
 mod recipe;
@@ -39,54 +49,102 @@ mod app_icon;
 use solidcraft_engine::Session;
 use solidcraft_engine::view::Guides;

-const USAGE: &str = "usage:
-  solidcraft-cli run <script.json|design.solidcraft|part.step> [--in design.solidcraft|part.step] [--out FILE]... [--save FILE] [--quiet] [--results] [--timings] [--profile] [--json-out FILE] [--allow-errors]
-  solidcraft-cli run --in <design.solidcraft|part.step> [--out FILE]...
-      (a timeline feature that fails fails the run and nothing is written; --allow-errors writes anyway)
-      (--timings prints {timings: [{index, command, ms}], total_ms} for a script, with --results its results too;
-       --profile adds each command's profile: {boolean_ms, tessellate_ms, other_ms}, the kernel's share)
-  solidcraft-cli eval <script.json|design.solidcraft|part.step> [--json-out FILE]     (alias: inspect; or --in FILE)
-      (--json-out FILE writes the JSON that run (with --results, else the measurement) and eval print to FILE instead of stdout,
-       as plain UTF-8: a shell's > can re-encode it, e.g. Windows PowerShell adds a byte-order mark)
-  solidcraft-cli script <design.solidcraft|script.json> [--out script.json]
-      (the design's history as a command script that eval and run replay)
-  solidcraft-cli bench-open <design.solidcraft | part.step> [--parse-only] [--save OUT.solidcraft] [--display LEVEL [--edit NAME EXPR]] [--ops script.json]
-      (--ops: after opening, run each command of the script and undo it, timing the command, the
-       evaluations it caused and the view it leaves: placing and meshing what changed)
-  solidcraft-cli bench-agent [--scale F] [--save design.solidcraft] [--script-out script.json]
-  solidcraft-cli snapshot <script|design> [--in design.solidcraft|part.step] --out shot.png [--width W] [--height H] [--view NAME | --camera JSON] [--no-grid] [--no-axes]
-      [--body NAME:opacity=0.3,color=#rrggbb]... [--tool NAME]... [--section z=27]
-  solidcraft-cli snapshot --in <design.solidcraft|part.step> --out shot.png ...
-      (as with run, --in starts from a design and the script runs on top of it; an option snapshot doesn't take is an error;
-       --view: iso, front, back, top, bottom, left, right, or the name of a view saved in the design with view.save;
-       --camera: {target: [x,y,z], yaw, pitch, distance, fov?} in mm and radians, as the MCP screenshot takes it (docs/mcp.md);
-       --no-grid and --no-axes leave the ground grid (on Z 0) and the origin's axes out of the picture;
-       --body: how one body is drawn, as appearance.assign takes it: opacity 0-1 (below 1 is see-through, so what is inside
-         it shows) and color #rrggbb, either or both, once per body;
-       --tool: draw this body solid in the tool colour and every other body see-through, so a cut's or a join's tool body
-         is visible inside the material it meets; a later --body overrides it;
-       --section: cut the model as inspect.section does, so the inside shows: z=27 (the plane through that world
-         coordinate, keeping the smaller side), add ,flip to keep the other side, or XY, XZ, YZ, or its own JSON)
-  solidcraft-cli render <script|design> --out image.png [--setup NAME] [--width W] [--height H] [--transparent] [--overwrite] [--timeout SECONDS]
-  solidcraft-cli exec <command> [json-params]
-  solidcraft-cli commands
-  solidcraft-cli recipe <recipe.json>
-  solidcraft-cli oracle <case-dir>... [--json]
-  solidcraft-cli fuzz [--from N] [--count N] [--jobs J] [--timeout S] [--steps N] [--minimise] [--out DIR] [--report FILE]
-  solidcraft-cli mcp [--in design.solidcraft|script.json] [--connect 127.0.0.1:PORT [--token T]] [--allow-path DIR]... [--allow-any-path]
-                     [--param-check off|warn|strict]
-  solidcraft-cli crashes [list [--json] | show <id> | replay <id> | dir | clear [<id>]]
-  solidcraft-cli licences
-  solidcraft-cli gpu [--policy auto|hardware|software|cpu]
-      (the GPU adapters a headless render can open, best first, the one the policy picks and the tier it
-       lands on: gpu, gpu-software, or the CPU rasterizer (auto with no adapter, or cpu); the policy defaults
-       to SOLIDCRAFT_GPU, else auto; exits with an error when hardware or software finds no such adapter)
-  solidcraft-cli icon --out icon.png [--size 256] | --out icon.ico
-";
+/// One command the CLI takes: the name to type, the usage it prints for `--help`,
+/// and whether the top-level usage lists it (an alias answers to another command's name).
+struct Command {
+    name: &'static str,
+    usage: &'static str,
+    listed: bool,
+}
+
+/// `run`'s lines in the usage.
+const USAGE_RUN: &str = "  solidcraft-cli run <script.json|design.sc|part.step> [--in design.sc|part.step] [--out FILE]... [--save FILE] [--quiet] [--results] [--timings] [--profile] [--json-out FILE] [--allow-errors]\n                     [--param-check off|warn|strict]\n  solidcraft-cli run --in <design.sc|part.step> [--out FILE]...\n      (a timeline feature that fails fails the run and nothing is written; --allow-errors writes anyway)\n      (--param-check checks each step against its command's contract: warn reports on stderr, strict stops the run)\n      (--timings prints {timings: [{index, command, ms}], total_ms} for a script, with --results its results too;\n       --profile adds each command's profile: {boolean_ms, tessellate_ms, other_ms}, the kernel's share)\n";
+/// `eval`'s lines in the usage.
+const USAGE_EVAL: &str = "  solidcraft-cli eval <script.json|design.sc|part.step> [--in design.sc|part.step] [--json-out FILE]     (alias: inspect)\n  solidcraft-cli eval --in <script.json|design.sc|part.step> [--json-out FILE]\n      (with both inputs, runs the positional script on --in before measuring; does not automatically save the modified design)\n      (--json-out FILE writes the JSON that run (with --results, else the measurement) and eval print to FILE instead of stdout,\n       as plain UTF-8: a shell's > can re-encode it, e.g. Windows PowerShell adds a byte-order mark)\n";
+/// `script`'s lines in the usage.
+const USAGE_SCRIPT: &str = "  solidcraft-cli script <design.sc|script.json> [--out script.json]\n      (the design's history as a command script that eval and run replay)\n";
+/// `bench-open`'s lines in the usage.
+const USAGE_BENCH_OPEN: &str = "  solidcraft-cli bench-open <design.sc | part.step> [--parse-only] [--save OUT.sc] [--display LEVEL [--edit NAME EXPR]] [--ops script.json]\n      (--ops: after opening, run each command of the script and undo it, timing the command, the\n       evaluations it caused and the view it leaves: placing and meshing what changed)\n";
+/// `bench-agent`'s lines in the usage.
+const USAGE_BENCH_AGENT: &str = "  solidcraft-cli bench-agent [--scale F] [--save design.sc] [--script-out script.json]\n";
+/// `bench-assistant`'s lines in the usage.
+const USAGE_BENCH_ASSISTANT: &str = "  solidcraft-cli bench-assistant --connect 127.0.0.1:PORT [--token T] --base-url URL --model NAME [--tasks 1,2,5] [--repeat N] [--timeout-s 300] [--json out.json] [--markdown out.md]\n";
+/// `snapshot`'s lines in the usage.
+const USAGE_SNAPSHOT: &str = "  solidcraft-cli snapshot <script|design> [--in design.sc|part.step] --out shot.png [--width W] [--height H] [--view NAME | --camera JSON] [--no-grid] [--no-axes]\n      [--body NAME:opacity=0.3,color=#rrggbb]... [--tool NAME]... [--section z=27]\n  solidcraft-cli snapshot --in <design.sc|part.step> --out shot.png ...\n      (as with run, --in starts from a design and the script runs on top of it; an option snapshot doesn't take is an error;\n       --view: iso, front, back, top, bottom, left, right, or the name of a view saved in the design with view.save;\n       --camera: {target: [x,y,z], yaw, pitch, distance, fov?} in mm and radians, as the MCP screenshot takes it (docs/mcp.md);\n       --no-grid and --no-axes leave the ground grid (on Z 0) and the origin's axes out of the picture;\n       --body: how one body is drawn, as appearance.assign takes it: opacity 0-1 (below 1 is see-through, so what is inside\n         it shows) and color #rrggbb, either or both, once per body;\n       --tool: draw this body solid in the tool colour and every other body see-through, so a cut's or a join's tool body\n         is visible inside the material it meets; a later --body overrides it;\n       --section: cut the model as inspect.section does, so the inside shows: z=27 (the plane through that world\n         coordinate, keeping the smaller side), add ,flip to keep the other side, or XY, XZ, YZ, or its own JSON)\n";
+/// `render`'s lines in the usage.
+const USAGE_RENDER: &str = "  solidcraft-cli render <script|design> --out image.png [--setup NAME] [--width W] [--height H] [--transparent] [--overwrite] [--timeout SECONDS]\n      [--progressive] [--samples N] [--max-depth N] [--seed N] [--exposure EV] [--lighting FILE.json] [--environment FILE.json] [--tone-map reinhard|aces_fitted]\n";
+/// `exec`'s lines in the usage.
+const USAGE_EXEC: &str = "  solidcraft-cli exec <command> [json-params]\n";
+/// `commands`'s lines in the usage.
+const USAGE_COMMANDS: &str = "  solidcraft-cli commands\n";
+/// `recipe`'s lines in the usage.
+const USAGE_RECIPE: &str = "  solidcraft-cli recipe <recipe.json>\n";
+/// `oracle`'s lines in the usage.
+const USAGE_ORACLE: &str = "  solidcraft-cli oracle <case-dir>... [--json]\n";
+/// `fuzz`'s lines in the usage.
+const USAGE_FUZZ: &str =
+    "  solidcraft-cli fuzz [--from N] [--count N] [--jobs J] [--timeout S] [--steps N] [--minimise] [--out DIR] [--report FILE]\n";
+/// `mcp`'s lines in the usage.
+const USAGE_MCP: &str = "  solidcraft-cli mcp [--headless] [--in design.sc|script.json] [--connect 127.0.0.1:PORT [--token T]] [--allow-path DIR]... [--allow-any-path]\n                     [--param-check off|warn|strict] [--render-gpu]\n  solidcraft-cli mcp setup [--dry-run] [--client opencode|claude-desktop|claude-code|cursor] [--live]\n      (adds a `solidcraft` server, with this program's path, to each installed AI client; --live adds `solidcraft-live` for the running app; alias: mcp install)\n";
+/// `crashes`'s lines in the usage.
+const USAGE_CRASHES: &str = "  solidcraft-cli crashes [list [--json] | show <id> | replay <id> | dir | clear [<id>]]\n";
+/// `licences`'s lines in the usage.
+const USAGE_LICENCES: &str = "  solidcraft-cli licences\n";
+/// `gpu`'s lines in the usage.
+const USAGE_GPU: &str = "  solidcraft-cli gpu [--policy auto|hardware|software|cpu]\n      (the GPU adapters a headless render can open, best first, the one the policy picks and the tier it\n       lands on: gpu, gpu-software, or the CPU rasterizer (auto with no adapter, or cpu); the policy defaults\n       to SOLIDCRAFT_GPU, else auto; exits with an error when hardware or software finds no such adapter)\n";
+/// `icon`'s lines in the usage.
+const USAGE_ICON: &str = "  solidcraft-cli icon --out icon.png [--size 256] | --out icon.ico\n";
+/// `fuzz-one`'s lines in the usage: a seed and the flags of one fuzz run.
+const USAGE_FUZZ_ONE: &str = "  solidcraft-cli fuzz-one <seed> [--steps N] [--minimise]\n";
+/// `bench-edit`'s lines in the usage: the parameter a script changes.
+const USAGE_BENCH_EDIT: &str = "  solidcraft-cli bench-edit <script.json|recipe.json> <param> <expr>\n";
+/// `save-stress`'s lines in the usage: the file saved over and over.
+const USAGE_SAVE_STRESS: &str = "  solidcraft-cli save-stress <path> <rounds>\n";
+/// The flags every command takes, at the end of the top-level usage.
+const USAGE_DEBUG: &str = "  --debug, with any command: what SolidCraft logs (why a body has no display plan, why a save left its\n      model cache out), on stderr; RUST_LOG=error|warn|info|debug|trace sets one level for every crate\n  --max-file-size SIZE, with any command: read STEP and import files and design files up to SIZE for this run\n      (for example 2GB or 1500MB; at most 16GB; the defaults are 512 MB and 256 MB, and a smaller SIZE keeps them)\n";
+
+/// The commands the CLI takes, in the order the top-level usage lists them.
+const COMMANDS: &[Command] = &[
+    Command { name: "run", usage: USAGE_RUN, listed: true },
+    Command { name: "eval", usage: USAGE_EVAL, listed: true },
+    Command { name: "inspect", usage: USAGE_EVAL, listed: false },
+    Command { name: "script", usage: USAGE_SCRIPT, listed: true },
+    Command { name: "bench-open", usage: USAGE_BENCH_OPEN, listed: true },
+    Command { name: "bench-agent", usage: USAGE_BENCH_AGENT, listed: true },
+    Command { name: "bench-assistant", usage: USAGE_BENCH_ASSISTANT, listed: true },
+    Command { name: "snapshot", usage: USAGE_SNAPSHOT, listed: true },
+    Command { name: "render", usage: USAGE_RENDER, listed: true },
+    Command { name: "exec", usage: USAGE_EXEC, listed: true },
+    Command { name: "commands", usage: USAGE_COMMANDS, listed: true },
+    Command { name: "recipe", usage: USAGE_RECIPE, listed: true },
+    Command { name: "oracle", usage: USAGE_ORACLE, listed: true },
+    Command { name: "fuzz", usage: USAGE_FUZZ, listed: true },
+    Command { name: "fuzz-one", usage: USAGE_FUZZ_ONE, listed: false },
+    Command { name: "mcp", usage: USAGE_MCP, listed: true },
+    Command { name: "crashes", usage: USAGE_CRASHES, listed: true },
+    Command { name: "licences", usage: USAGE_LICENCES, listed: true },
+    Command { name: "licenses", usage: USAGE_LICENCES, listed: false },
+    Command { name: "gpu", usage: USAGE_GPU, listed: true },
+    Command { name: "icon", usage: USAGE_ICON, listed: true },
+    Command { name: "bench-edit", usage: USAGE_BENCH_EDIT, listed: false },
+    Command { name: "save-stress", usage: USAGE_SAVE_STRESS, listed: false },
+];

 fn main() -> ExitCode {
-    let args: Vec<String> = std::env::args().skip(1).collect();
+    let mut args: Vec<String> = std::env::args().skip(1).collect();
+    logger::init(&mut args);
+    if let Err(e) = max_file_size(&mut args) {
+        eprintln!("error: {e}");
+        return ExitCode::FAILURE;
+    }
    let r = match args.first().map(String::as_str) {
+        // Asked-for help is not an error: the command's usage on stdout, exit 0. It is read
+        // before the command runs, so `--help` never starts a run (a fuzz run, a server).
+        Some(cmd) if wants_help(&args[1..]) && is_command(cmd) => {
+            use std::io::Write as _;
+            let _ = std::io::stdout().lock().write_all(command_usage(cmd).as_bytes());
+            Ok(())
+        }
        Some("run") => cmd_run(&args[1..]),
        Some("eval" | "inspect") => cmd_eval(&args[1..]),
        Some("script") => cmd_script(&args[1..]),
@@ -107,7 +165,7 @@ fn main() -> ExitCode {
                }
            })
        }
-        Some("recipe") => args.get(1).ok_or_else(|| USAGE.to_string()).and_then(|p| {
+        Some("recipe") => args.get(1).ok_or_else(usage).and_then(|p| {
            let v = read_json(p)?;
            recipe::to_script(&v).map(|s| println!("{}", pretty(&s)))
        }),
@@ -130,11 +188,19 @@ fn main() -> ExitCode {
        Some("bench-open") => cmd_bench_open(&args[1..]),
        // A ~1,300-body design built command by command, as an agent builds one over MCP.
        Some("bench-agent") => bench_agent::run(&args[1..]),
+        // The standard Assistant model test (#4851), run against a desktop app over its control channel.
+        Some("bench-assistant") => bench_assistant::run(&args[1..]),
        Some("--version" | "-V") => {
            println!("solidcraft-cli {}", env!("CARGO_PKG_VERSION"));
            Ok(())
        }
-        _ => Err(USAGE.to_string()),
+        // Asked-for help is not an error: usage on stdout, exit 0.
+        Some("--help" | "-h" | "help") => {
+            use std::io::Write as _;
+            let _ = std::io::stdout().lock().write_all(usage().as_bytes());
+            Ok(())
+        }
+        _ => Err(usage()),
    };
    match r {
        Ok(()) => ExitCode::SUCCESS,
@@ -145,18 +211,70 @@ fn main() -> ExitCode {
    }
 }

+/// Take `--max-file-size SIZE` (or `--max-file-size=SIZE`), which any command takes, out of the
+/// arguments and raise the file size limits for this run (#4086). A bad size is an error.
+fn max_file_size(args: &mut Vec<String>) -> Result<(), String> {
+    let mut size = None;
+    let mut i = 0;
+    while let Some(arg) = args.get(i) {
+        if arg == "--max-file-size" {
+            let value = args.get(i + 1).cloned().ok_or("--max-file-size needs a size, for example --max-file-size 2GB")?;
+            args.drain(i..i + 2);
+            size = Some(value);
+        } else if let Some(value) = arg.strip_prefix("--max-file-size=") {
+            size = Some(value.to_string());
+            args.remove(i);
+        } else {
+            i += 1;
+        }
+    }
+    let Some(size) = size else { return Ok(()) };
+    let bytes = solidcraft_engine::io::limits::parse_flag(&size).map_err(|e| format!("--max-file-size: {e}"))?;
+    solidcraft_engine::io::limits::set_override(Some(bytes))
+}
+
 fn pretty(v: &Value) -> String {
    serde_json::to_string_pretty(v).unwrap_or_default()
 }

+/// The whole usage: every command's lines under one `usage:` line. The lines come from the
+/// same place a command's own `--help` prints, so the two cannot drift apart.
+fn usage() -> String {
+    let mut s = String::from("usage:\n");
+    for c in COMMANDS.iter().filter(|c| c.listed) {
+        s.push_str(c.usage);
+    }
+    s.push_str(USAGE_DEBUG);
+    s
+}
+
+/// A command's own usage: its lines under a `usage:` line.
+fn command_usage(cmd: &str) -> String {
+    match COMMANDS.iter().find(|c| c.name == cmd) {
+        Some(c) => format!("usage:\n{}", c.usage),
+        None => usage(),
+    }
+}
+
+/// Whether the name is a command the CLI takes.
+fn is_command(cmd: &str) -> bool {
+    COMMANDS.iter().any(|c| c.name == cmd)
+}
+
+/// Whether the arguments ask for help.
+fn wants_help(args: &[String]) -> bool {
+    args.iter().any(|a| a == "--help" || a == "-h")
+}
+
 pub fn read_json(path: &str) -> Result<Value, String> {
    // Through the engine's file access, which refuses anything that is not a regular file and
    // reads no more than the cap: a character device or a FIFO would otherwise never end.
-    let s = solidcraft_engine::io::vfs::read_to_string(path, solidcraft_engine::io::MAX_DESIGN_BYTES).map_err(|e| format!("{path}: {e}"))?;
+    let s = solidcraft_engine::io::vfs::read_to_string(path, solidcraft_engine::io::limits::max_design_bytes())
+        .map_err(|e| format!("{path}: {}", solidcraft_engine::io::limits::explain(solidcraft_engine::io::limits::Kind::Design, e)))?;
    serde_json::from_str(&s).map_err(|e| format!("{path}: {e}"))
 }

-/// A session from a design file, a STEP/3MF/STL file, a command script, or an oracle recipe.
+/// A session from a design file, a STEP/3MF/STL file, a point cloud, a command script, or an oracle recipe.
 pub fn load(path: &str) -> Result<Session, String> {
    load_checked(path, solidcraft_engine::schema::ParamCheck::Off)
 }
@@ -166,15 +284,14 @@ pub fn load(path: &str) -> Result<Session, String> {
 fn load_checked(path: &str, check: solidcraft_engine::schema::ParamCheck) -> Result<Session, String> {
    let mut s = Session::default();
    s.param_check = check;
-    if solidcraft_engine::io::is_step_path(path) || solidcraft_engine::io::is_mesh_path(path) {
+    if solidcraft_engine::io::is_step_path(path) || solidcraft_engine::io::is_mesh_path(path) || solidcraft_engine::io::is_point_cloud_path(path) {
        s.execute("doc.open", &json!({"path": path})).map_err(|e| e.to_string())?;
        return Ok(s);
    }
-    let bytes = solidcraft_engine::io::vfs::read(path, solidcraft_engine::io::MAX_DESIGN_BYTES).map_err(|e| format!("{path}: {e}"))?;
+    let bytes = solidcraft_engine::io::limits::read(path, solidcraft_engine::io::limits::Kind::Design).map_err(|e| format!("{path}: {e}"))?;
    if solidcraft_engine::io::is_design_container(&bytes) {
        let doc = solidcraft_engine::io::read_design(&bytes).map_err(|e| format!("{path}: {e}"))?;
-        let mut session = Session::new(doc);
-        session.path = Some(path.to_owned());
+        let mut session = Session::opened_at(doc, None, Some(path));
        session.param_check = check;
        return Ok(session);
    }
@@ -183,18 +300,36 @@ fn load_checked(path: &str, check: solidcraft_engine::schema::ParamCheck) -> Res
        s.execute("doc.open", &json!({"path": path})).map_err(|e| e.to_string())?;
    } else {
        let script = if v.get("features").is_some() && v.get("commands").is_none() { recipe::to_script(&v)? } else { v };
-        // Warn level: each step's `param_warnings` as it completes, even when a later step fails
-        // (stderr, so stdout stays the caller's).
-        let mut warn = |step: usize, r: &Value| {
-            for w in r.get("param_warnings").and_then(Value::as_array).into_iter().flatten() {
-                eprintln!("{path}: step {}: {}", step + 1, w.as_str().unwrap_or_default());
-            }
-        };
-        s.run_script_each(&script, &mut warn).map_err(|e| e.to_string())?;
+        run_script_warning(&mut s, path, &script)?;
    }
    Ok(s)
 }

+/// Run `script`, read from `path`, on `s`. At the warn level each step's `param_warnings` go to
+/// stderr as the step completes, even when a later step fails (stdout stays the caller's).
+fn run_script_warning(s: &mut Session, path: &str, script: &Value) -> Result<Vec<Value>, String> {
+    s.run_script_each(script, &mut |step, r| print_param_warnings(path, step, r)).map_err(|e| e.to_string())
+}
+
+/// Step `step`'s `param_warnings` on stderr, one per line, named after the script at `path`.
+fn print_param_warnings(path: &str, step: usize, r: &Value) {
+    for w in r.get("param_warnings").and_then(Value::as_array).into_iter().flatten() {
+        eprintln!("{path}: step {}: {}", step + 1, w.as_str().unwrap_or_default());
+    }
+}
+
+/// `--param-check off|warn|strict`: how calls that break a command's parameter contract are
+/// treated (docs/mcp.md); off when the option isn't given.
+fn parse_param_check(cmd: &str, args: &[String]) -> Result<solidcraft_engine::schema::ParamCheck, String> {
+    match flag(args, "--param-check") {
+        None if args.iter().any(|a| a == "--param-check") => Err(format!("{cmd}: --param-check wants off, warn or strict")),
+        None => Ok(solidcraft_engine::schema::ParamCheck::Off),
+        Some(v) => {
+            solidcraft_engine::schema::ParamCheck::parse(v).ok_or_else(|| format!("{cmd}: --param-check wants off, warn or strict, not `{v}`"))
+        }
+    }
+}
+
 fn flag<'a>(args: &'a [String], name: &str) -> Option<&'a str> {
    args.iter().position(|a| a == name).and_then(|i| args.get(i + 1)).map(String::as_str)
 }
@@ -251,10 +386,19 @@ fn print_json(v: &Value, file: Option<&str>) -> Result<(), String> {
 fn cmd_run(args: &[String]) -> Result<(), String> {
    install_renderer();
    let json_out = json_out(args)?;
+    // Before the option check, so a bare `--param-check` gets the words `mcp` uses.
+    let check = parse_param_check("run", args)?;
+    known_args(
+        "run",
+        args,
+        &["--in", "--out", "--save", "--json-out", "--param-check"],
+        &["--quiet", "--results", "--timings", "--profile", "--allow-errors"],
+        true,
+    )?;
    let base = flag(args, "--in");
    let path = positional(args);
    if path.is_none() && base.is_none() {
-        return Err(USAGE.to_string());
+        return Err(usage());
    }
    let want_results = args.iter().any(|a| a == "--results");
    // `--profile` times each command and splits out its kernel time; it implies `--timings`.
@@ -263,23 +407,25 @@ fn cmd_run(args: &[String]) -> Result<(), String> {
    let (mut s, results) = if want_results || timings {
        // Collect every command's result or time (scripts only), then process requested files too.
        let mut s = match base {
-            Some(b) => load(b)?,
+            Some(b) => load_checked(b, check)?,
            None => Session::default(),
        };
+        s.param_check = check;
        let needs = if want_results { "--results needs a script" } else { "--timings needs a script" };
-        let v = read_json(path.ok_or(needs)?)?;
+        let script = path.ok_or(needs)?;
+        let v = read_json(script)?;
        let out = if timings {
-            let (r, mut t) = s.run_script_timed(&v, profile).map_err(|e| e.to_string())?;
+            let (r, mut t) = s.run_script_timed(&v, profile, &mut |step, r| print_param_warnings(script, step, r)).map_err(|e| e.to_string())?;
            if want_results && let Some(o) = t.as_object_mut() {
                o.insert("results".into(), Value::Array(r));
            }
            t
        } else {
-            Value::Array(s.run_script(&v).map_err(|e| e.to_string())?)
+            Value::Array(run_script_warning(&mut s, script, &v)?)
        };
        (s, Some(out))
    } else {
-        (open(base, path)?, None)
+        (open(base, path, check)?, None)
    };
    // A feature that fails leaves the bodies as they were before it (a parameter change can
    // break a feature without failing the command that made it): writing them would hand out
@@ -303,24 +449,25 @@ fn cmd_run(args: &[String]) -> Result<(), String> {
    Ok(())
 }

-/// The session `run` and `snapshot` start from: `--in` (a design or STEP file) with the
-/// positional script run on top of it, or either one alone.
-fn open(base: Option<&str>, path: Option<&String>) -> Result<Session, String> {
+/// The session `run`, `eval` and `snapshot` start from: `--in` (a design or STEP file) with the
+/// positional script run on top of it, or either one alone, with scripts run at `check`.
+fn open(base: Option<&str>, path: Option<&String>, check: solidcraft_engine::schema::ParamCheck) -> Result<Session, String> {
    match (base, path) {
        (Some(b), Some(p)) => {
-            let mut s = load(b)?;
-            s.run_script(&read_json(p)?).map_err(|e| e.to_string())?;
+            let mut s = load_checked(b, check)?;
+            run_script_warning(&mut s, p, &read_json(p)?)?;
            Ok(s)
        }
-        (Some(b), None) => load(b),
-        (None, Some(p)) => load(p),
-        (None, None) => Err(USAGE.to_string()),
+        (Some(b), None) => load_checked(b, check),
+        (None, Some(p)) => load_checked(p, check),
+        (None, None) => Err(usage()),
    }
 }

 /// Refuses an option `cmd` doesn't take, and one missing its value: a typo, or another
-/// command's option, would otherwise be ignored without a word.
-fn known_flags(cmd: &str, args: &[String], valued: &[&str], switches: &[&str]) -> Result<(), String> {
+/// command's option, would otherwise be ignored without a word. `positionals` says whether the
+/// command takes a word of its own (a file, a seed): `fuzz` takes none, and would start a run.
+fn known_args(cmd: &str, args: &[String], valued: &[&str], switches: &[&str], positionals: bool) -> Result<(), String> {
    let mut i = 0;
    while let Some(a) = args.get(i) {
        if valued.contains(&a.as_str()) {
@@ -328,7 +475,9 @@ fn known_flags(cmd: &str, args: &[String], valued: &[&str], switches: &[&str]) -
                Some(v) if !v.starts_with("--") => i += 2,
                _ => return Err(format!("{cmd}: {a} needs a value")),
            }
-        } else if a.starts_with("--") && !switches.contains(&a.as_str()) {
+        } else if switches.contains(&a.as_str()) {
+            i += 1;
+        } else if a.starts_with("--") || !positionals {
            return Err(format!("{cmd} doesn't take {a} (it takes {})", [valued, switches].concat().join(", ")));
        } else {
            i += 1;
@@ -352,8 +501,8 @@ fn timeline_ok(s: &Session) -> Result<(), String> {

 fn cmd_eval(args: &[String]) -> Result<(), String> {
    let json_out = json_out(args)?;
-    let path = flag(args, "--in").or_else(|| positional(args).map(String::as_str)).ok_or_else(|| USAGE.to_string())?;
-    let mut s = load(path)?;
+    known_args("eval", args, &["--in", "--json-out"], &[], true)?;
+    let mut s = open(flag(args, "--in"), positional(args), solidcraft_engine::schema::ParamCheck::Off)?;
    let m = s.execute("inspect.measure", &json!({})).map_err(|e| e.to_string())?;
    let d = s.execute("document.inspect", &json!({})).map_err(|e| e.to_string())?;
    let out = json!({
@@ -370,7 +519,7 @@ fn cmd_eval(args: &[String]) -> Result<(), String> {
 /// A design's history as a command script (`timeline.export_script`): printed, or written to
 /// `--out`; what the script leaves out goes to stderr.
 fn cmd_script(args: &[String]) -> Result<(), String> {
-    let path = positional(args).ok_or_else(|| USAGE.to_string())?;
+    let path = positional(args).ok_or_else(usage)?;
    let s = &mut load(path)?;
    let out = flag(args, "--out");
    let r = s.execute("timeline.export_script", &json!({"path": out})).map_err(|e| e.to_string())?;
@@ -431,14 +580,15 @@ fn install_renderer() {

 fn cmd_snapshot(args: &[String]) -> Result<(), String> {
    install_renderer();
-    known_flags(
+    known_args(
        "snapshot",
        args,
        &["--in", "--out", "--width", "--height", "--view", "--camera", "--body", "--tool", "--section"],
        &["--no-grid", "--no-axes"],
+        true,
    )?;
    if positional(args).is_none() && flag(args, "--in").is_none() {
-        return Err(USAGE.to_string());
+        return Err(usage());
    }
    let out = flag(args, "--out").ok_or("snapshot needs --out FILE.png")?;
    let size = |name: &str, default: u32| match flag(args, name) {
@@ -446,7 +596,7 @@ fn cmd_snapshot(args: &[String]) -> Result<(), String> {
        Some(x) => x.parse().ok().filter(|n| (16..=8192).contains(n)).ok_or_else(|| format!("{name} must be 16 to 8192 pixels, not `{x}`")),
    };
    let (w, h) = (size("--width", 1280)?, size("--height", 800)?);
-    let mut s = open(flag(args, "--in"), positional(args))?;
+    let mut s = open(flag(args, "--in"), positional(args), solidcraft_engine::schema::ParamCheck::Off)?;
    // How the bodies are drawn and where the model is cut, through the commands the app's
    // Appearance dialog and Section Analysis run (`preview`).
    preview::apply(&mut s, &flags(args, "--body"), &flags(args, "--tool"), flag(args, "--section"))?;
@@ -522,7 +672,7 @@ fn ico(images: &[(usize, Vec<u8>)]) -> Result<Vec<u8>, String> {

 fn cmd_exec(args: &[String]) -> Result<(), String> {
    install_renderer();
-    let id = args.first().ok_or_else(|| USAGE.to_string())?;
+    let id = args.first().ok_or_else(usage)?;
    let p: Value = match args.get(1) {
        Some(t) => serde_json::from_str(t).map_err(|e| format!("params: {e}"))?,
        None => json!({}),
@@ -533,17 +683,34 @@ fn cmd_exec(args: &[String]) -> Result<(), String> {
    Ok(())
 }

+/// `mcp setup`: add the server to each installed AI client, with this program's own path.
+fn cmd_mcp_setup(args: &[String]) -> Result<(), String> {
+    use solidcraft_engine::agent_setup as setup;
+    let (lines, ok) = setup::setup(args, &setup::Env::from_process(), &setup::current_exe()?)?;
+    for l in lines {
+        println!("{l}");
+    }
+    if ok { Ok(()) } else { Err("mcp setup: some clients could not be configured".into()) }
+}
+
 /// MCP server on stdio: headless (optionally starting from a design or script) or bridged to
 /// a running app's control port. stdout carries only protocol messages. Files the agent's tool
 /// calls reach are confined to `solidcraft_mcp::agent_scope` unless `--allow-any-path` is given.
 fn cmd_mcp(args: &[String]) -> Result<(), String> {
+    if matches!(args.first().map(String::as_str), Some("setup" | "install")) {
+        return cmd_mcp_setup(&args[1..]);
+    }
+    let render_gpu = args.iter().any(|arg| arg == "--render-gpu");
+    if render_gpu && flag(args, "--connect").is_some() {
+        return Err("mcp: --render-gpu installs a headless image host; a connected application owns its own device".into());
+    }
    install_renderer();
    let scope = (!args.iter().any(|a| a == "--allow-any-path"))
        .then(|| solidcraft_mcp::agent_scope(flags(args, "--allow-path").into_iter().map(std::path::PathBuf::from)));
    if let Some(s) = &scope {
        let roots: Vec<String> = s.roots().iter().map(|r| r.display().to_string()).collect();
        eprintln!(
-            "solidcraft mcp: files limited to {} and the open design's folder (--allow-path DIR adds one, --allow-any-path lifts the limit)",
+            "solidcraft mcp: files limited to {} and the folders of designs opened or saved here (--allow-path DIR adds one, --allow-any-path lifts the limit)",
            roots.join(", ")
        );
        let design_dir = flag(args, "--in")
@@ -553,17 +720,8 @@ fn cmd_mcp(args: &[String]) -> Result<(), String> {
            eprintln!("solidcraft mcp: the design's folder is left out because {why}; add it with --allow-path if you mean it");
        }
    }
-    // How a headless session treats calls that break a command's parameter contract (docs/mcp.md).
-    let param_check = match flag(args, "--param-check") {
-        None if args.iter().any(|a| a == "--param-check") => return Err("mcp: --param-check wants off, warn or strict".into()),
-        None => solidcraft_engine::schema::ParamCheck::Off,
-        Some(v) => {
-            solidcraft_engine::schema::ParamCheck::parse(v).ok_or_else(|| format!("mcp: --param-check wants off, warn or strict, not `{v}`"))?
-        }
-    };
-    if param_check != solidcraft_engine::schema::ParamCheck::Off && flag(args, "--connect").is_some() {
-        eprintln!("solidcraft mcp: --param-check applies to headless sessions; calls to the app are not checked yet");
-    }
+    // How calls that break a command's parameter contract are treated, headless or bridged.
+    let param_check = parse_param_check("mcp", args)?;
    let backend: Box<dyn solidcraft_mcp::Backend> = match (flag(args, "--connect"), flag(args, "--in")) {
        (Some(_), Some(_)) => return Err("mcp: use either --connect or --in, not both".into()),
        (Some(addr), None) => {
@@ -571,7 +729,7 @@ fn cmd_mcp(args: &[String]) -> Result<(), String> {
                return Err(format!("mcp: --connect wants HOST:PORT, such as 127.0.0.1:7878, not `{addr}`"));
            };
            // Serve without the app too: the tools connect once it runs, and say it isn't until then.
-            let mut remote = solidcraft_mcp::Remote::new(addr, flag(args, "--token"));
+            let mut remote = solidcraft_mcp::Remote::new(addr, flag(args, "--token")).with_param_check(param_check);
            if let Err(e) = remote.try_connect() {
                eprintln!(
                    "solidcraft mcp: no SolidCraft app at {addr} yet ({e}); start it with `solidcraft --control {port}` \
@@ -580,18 +738,50 @@ fn cmd_mcp(args: &[String]) -> Result<(), String> {
            }
            Box::new(remote)
        }
-        (None, Some(path)) => Box::new(solidcraft_mcp::Headless::new(load_checked(path, param_check)?)),
-        (None, None) => {
-            let mut headless = solidcraft_mcp::Headless::default();
-            headless.session.param_check = param_check;
+        (None, Some(path)) => {
+            let mut headless = solidcraft_mcp::Headless::new(load_checked(path, param_check)?);
+            if render_gpu {
+                headless.session.register_render_job_host(solidcraft_gpu::path::host().map_err(|e| e.to_string())?).map_err(|e| e.to_string())?;
+            }
            Box::new(headless)
        }
+        (None, None) => {
+            let auto = !args.iter().any(|a| a == "--headless");
+            if auto && let Some(port) = discover_app() {
+                eprintln!("solidcraft mcp: bridged to the running app at 127.0.0.1:{port} (--headless starts a session of its own)");
+                let remote = solidcraft_mcp::Remote::new(&format!("127.0.0.1:{port}"), flag(args, "--token")).with_param_check(param_check);
+                return serve_mcp(Box::new(remote), scope);
+            }
+            let mut headless = solidcraft_mcp::Headless::default();
+            headless.session.param_check = param_check;
+            if render_gpu {
+                headless.session.register_render_job_host(solidcraft_gpu::path::host().map_err(|e| e.to_string())?).map_err(|e| e.to_string())?;
+            }
+            if auto {
+                // The app may start after the agent: look for it again until there is work here.
+                Box::new(solidcraft_mcp::Auto::new(headless, Box::new(discover_app), flag(args, "--token")))
+            } else {
+                Box::new(headless)
+            }
+        }
    };
+    serve_mcp(backend, scope)
+}
+
+fn serve_mcp(backend: Box<dyn solidcraft_mcp::Backend>, scope: Option<solidcraft_engine::io::vfs::PathScope>) -> Result<(), String> {
    let stdin = std::io::stdin();
    let stdout = std::io::stdout();
    solidcraft_mcp::Server::new(backend).with_path_scope(scope).serve(stdin.lock(), stdout.lock()).map_err(|e| e.to_string())
 }

+/// The port of the running desktop app: the one its discovery file names, if something listens
+/// there (a file left by an app that crashed names a closed port).
+fn discover_app() -> Option<u16> {
+    let port = solidcraft_engine::control_auth::read_current_port()?;
+    let addr = std::net::SocketAddr::from(([127, 0, 0, 1], port));
+    std::net::TcpStream::connect_timeout(&addr, std::time::Duration::from_millis(500)).ok().map(|_| port)
+}
+
 /// `save-stress <path> <rounds>`: save a design of a few hundred kilobytes `rounds` times, its
 /// parameter `save_round` set to the round number each time.
 fn cmd_save_stress(args: &[String]) -> Result<(), String> {
@@ -676,11 +866,11 @@ fn bench_ops(mut s: Session, script: &str) -> Result<Session, String> {

 /// Separate file reading, JSON decoding/repair, timeline evaluation and display meshing.
 pub(crate) fn cmd_bench_open(args: &[String]) -> Result<(), String> {
-    let path = args.first().ok_or("usage: solidcraft-cli bench-open <design.solidcraft | part.step> [--parse-only]")?;
+    let path = args.first().ok_or("usage: solidcraft-cli bench-open <design.sc | part.step> [--parse-only]")?;
    let t = std::time::Instant::now();
    let step = solidcraft_engine::io::is_step_path(path);
-    let limit = if step { solidcraft_engine::io::MAX_STEP_BYTES } else { solidcraft_engine::io::MAX_DESIGN_BYTES };
-    let bytes = solidcraft_engine::io::vfs::read(path, limit).map_err(|e| format!("{path}: {e}"))?;
+    let kind = if step { solidcraft_engine::io::limits::Kind::Step } else { solidcraft_engine::io::limits::Kind::Design };
+    let bytes = solidcraft_engine::io::limits::read(path, kind).map_err(|e| format!("{path}: {e}"))?;
    let read_ms = t.elapsed().as_secs_f64() * 1000.0;
    println!("{}", json!({"step": "read", "ms": read_ms, "bytes": bytes.len()}));
    let t = std::time::Instant::now();
@@ -702,11 +892,12 @@ pub(crate) fn cmd_bench_open(args: &[String]) -> Result<(), String> {
        return Ok(());
    }
    let t = std::time::Instant::now();
-    let s = Session::opened(doc, saved.as_ref());
+    let s = Session::opened_at(doc, saved.as_ref(), (!step).then_some(path.as_str()));
    drop(read);
-    // Taken from the file: nothing evaluated (SOLIDCRAFT_NO_MODEL_CACHE evaluates anyway).
+    // Taken from the file: nothing evaluated (SOLIDCRAFT_NO_MODEL_CACHE evaluates anyway), or
+    // only the features whose state a thinned file left out.
    let adopted = saved.is_some() && s.model.last_recomputed == 0;
-    println!("{}", json!({"step": "evaluate", "ms": t.elapsed().as_secs_f64() * 1000.0, "adopted": adopted}));
+    println!("{}", json!({"step": "evaluate", "ms": t.elapsed().as_secs_f64() * 1000.0, "adopted": adopted, "recomputed": s.model.last_recomputed}));
    for r in &s.model.results {
        println!("{}", json!({"step": "feature", "id": r.id, "name": r.name, "ms": r.ms, "error": r.error}));
    }
@@ -721,13 +912,13 @@ pub(crate) fn cmd_bench_open(args: &[String]) -> Result<(), String> {
        json!({"step": "mesh", "ms": t.elapsed().as_secs_f64() * 1000.0, "place_ms": place_ms, "bodies": st.bodies.len(), "triangles": triangles})
    );
    let flag = |name: &str| args.iter().position(|a| a == name);
-    // `--save PATH`: save the opened design without its model cache (to PATH.plain.solidcraft) and
+    // `--save PATH`: save the opened design without its model cache (to PATH.plain.sc) and
    // as the app does, with it, then read the cache back.
    let s = match flag("--save").and_then(|i| args.get(i + 1)) {
        Some(out) => {
            let mut s = s;
            // Without the cache first, for comparison.
-            let plain = format!("{out}.plain.solidcraft");
+            let plain = format!("{out}.plain.{}", solidcraft_engine::io::DESIGN_EXT);
            let t = std::time::Instant::now();
            s.execute("file.save_as", &json!({"path": plain, "cache": false})).map_err(|e| e.to_string())?;
            let plain_ms = t.elapsed().as_secs_f64() * 1000.0;
@@ -1,25 +1,89 @@
 //! Complete headless image-job workflow through the same engine commands as the UI/MCP.
-use serde_json::json;
+use serde_json::{Value, json};
 use solidcraft_engine::{
-    doc::render_settings::RenderSetup,
-    render::job::{CpuHost, JobId, Phase},
+    Session,
+    doc::render_settings::{RenderJob, RenderSetup},
+    render::job::{CpuHost, JobId, Phase, ToneMap},
 };

+/// Only explicit runtime CLI flags are stored here. A typed setup owns these
+/// values even when a supplied flag happens to match the saved value.
+#[derive(Default)]
+struct RuntimeOptions {
+    progressive: bool,
+    transparent: bool,
+    samples: Option<u32>,
+    max_depth: Option<u32>,
+    seed: Option<u32>,
+    lighting: Option<String>,
+    tone_map: Option<ToneMap>,
+    environment: Option<String>,
+}
+
+impl RuntimeOptions {
+    fn explicit_flag(&self) -> Option<&'static str> {
+        [
+            (self.progressive, "--progressive"),
+            (self.transparent, "--transparent"),
+            (self.samples.is_some(), "--samples"),
+            (self.max_depth.is_some(), "--max-depth"),
+            (self.seed.is_some(), "--seed"),
+            (self.lighting.is_some(), "--lighting"),
+            (self.tone_map.is_some(), "--tone-map"),
+            (self.environment.is_some(), "--environment"),
+        ]
+        .into_iter()
+        .find_map(|(present, flag)| present.then_some(flag))
+    }
+
+    fn request(&self, session: &Session, settings: RenderSetup) -> Result<(Value, bool), String> {
+        if let Some(job) = &settings.job {
+            if let Some(flag) = self.explicit_flag() {
+                return Err(format!("{flag} cannot accompany a typed saved render setup; change the saved job options instead"));
+            }
+            settings.validate().map_err(|e| e.to_string())?;
+            session.doc.render.validate_resources(&settings).map_err(|e| e.to_string())?;
+            let needs_gpu = matches!(job, RenderJob::GpuPath { .. });
+            return Ok((json!({"settings":settings}), needs_gpu));
+        }
+        // Legacy setups and unnamed requests retain their runtime wire contract.
+        settings.validate().map_err(|e| e.to_string())?;
+        let mut params = json!({"settings":settings,"transparent_background":self.transparent,
+            "progressive":self.progressive,"samples":self.samples,"max_depth":self.max_depth,"seed":self.seed});
+        if let Some(path) = &self.lighting {
+            let text = solidcraft_engine::io::vfs::read_to_string(path, 65536).map_err(|e| format!("could not read lighting: {e}"))?;
+            let lighting: solidcraft_engine::render::job::StudioLighting = serde_json::from_str(&text).map_err(|e| e.to_string())?;
+            params["lighting"] = json!(lighting);
+        }
+        if let Some(tone_map) = self.tone_map {
+            params["tone_map"] = json!(tone_map);
+        }
+        if let Some(path) = &self.environment {
+            let text = solidcraft_engine::io::vfs::read_to_string(path, 65536).map_err(|e| format!("could not read environment: {e}"))?;
+            params["environment"] = serde_json::from_str(&text).map_err(|e| e.to_string())?;
+        }
+        Ok((params, self.progressive))
+    }
+}
+
 pub fn run(args: &[String]) -> Result<(), String> {
    let input = args.first().filter(|p| !p.starts_with('-')).ok_or("render requires an input design or script")?;
    let mut out = None;
    let mut setup = None;
    let mut width = None;
    let mut height = None;
-    let mut transparent = false;
+    let mut exposure = None;
+    let mut runtime = RuntimeOptions::default();
    let mut overwrite = false;
    let mut timeout = 120u64;
    let mut i = 1;
    while let Some(arg) = args.get(i) {
        match arg.as_str() {
-            "--transparent" => transparent = true,
+            "--progressive" => runtime.progressive = true,
+            "--transparent" => runtime.transparent = true,
            "--overwrite" => overwrite = true,
-            "--out" | "--setup" | "--width" | "--height" | "--timeout" => {
+            "--out" | "--setup" | "--width" | "--height" | "--timeout" | "--samples" | "--max-depth" | "--seed" | "--exposure" | "--lighting"
+            | "--tone-map" | "--environment" => {
                i += 1;
                let value = args.get(i).ok_or_else(|| format!("missing value for {arg}"))?;
                match arg.as_str() {
@@ -27,6 +91,20 @@ pub fn run(args: &[String]) -> Result<(), String> {
                    "--setup" => setup = Some(value.clone()),
                    "--width" => width = Some(value.parse::<u32>().map_err(|_| "invalid width")?),
                    "--height" => height = Some(value.parse::<u32>().map_err(|_| "invalid height")?),
+                    "--samples" => runtime.samples = Some(value.parse::<u32>().map_err(|_| "invalid samples")?),
+                    "--max-depth" => runtime.max_depth = Some(value.parse::<u32>().map_err(|_| "invalid depth")?),
+                    "--seed" => runtime.seed = Some(value.parse::<u32>().map_err(|_| "invalid seed")?),
+                    "--exposure" => exposure = Some(value.parse::<f64>().map_err(|_| "invalid exposure")?),
+                    // Defer file reads until a saved job has rejected conflicting controls.
+                    "--environment" => runtime.environment = Some(value.clone()),
+                    "--lighting" => runtime.lighting = Some(value.clone()),
+                    "--tone-map" => {
+                        runtime.tone_map = Some(match value.as_str() {
+                            "reinhard" => ToneMap::Reinhard,
+                            "aces_fitted" => ToneMap::AcesFitted,
+                            _ => return Err("tone-map must be reinhard or aces_fitted".into()),
+                        })
+                    }
                    _ => timeout = value.parse::<u64>().map_err(|_| "invalid timeout")?,
                }
            }
@@ -39,18 +117,10 @@ pub fn run(args: &[String]) -> Result<(), String> {
    }
    let out = out.ok_or("render requires --out FILE.png")?;
    let mut session = crate::load(input)?;
-    session.set_render_job_host(Some(CpuHost::for_platform().map_err(|e| e.to_string())?)).map_err(|e| e.to_string())?;
-    session.execute("render.scene", &json!({})).map_err(|e| e.to_string())?;
-    let mut settings = if let Some(name) = setup {
-        session.doc.render.setups.get(&name).cloned().ok_or("no saved render setup with that name")?
+    let mut settings = if let Some(name) = setup.as_deref() {
+        session.doc.render.setups.get(name).cloned().ok_or("no saved render setup with that name")?
    } else {
-        let mut settings = RenderSetup::default();
-        if let Some(camera) = session.camera {
-            settings.camera = camera;
-        } else {
-            settings.camera.fit(&solidcraft_engine::product_scene::extract(&session).map_err(|e| e.to_string())?.bounds);
-        }
-        settings
+        RenderSetup::default()
    };
    if let Some(width) = width {
        settings.width = width;
@@ -58,7 +128,27 @@ pub fn run(args: &[String]) -> Result<(), String> {
    if let Some(height) = height {
        settings.height = height;
    }
-    let params = json!({"settings":settings,"transparent_background":transparent});
+    if let Some(exposure) = exposure {
+        settings.exposure_ev = exposure;
+    }
+    // Resolve saved intent before opening a GPU or explicitly settling geometry.
+    // Width/height/exposure only change this validated inline settings clone.
+    let (mut params, needs_gpu) = runtime.request(&session, settings)?;
+    session.set_render_job_host(Some(CpuHost::for_platform().map_err(|e| e.to_string())?)).map_err(|e| e.to_string())?;
+    if needs_gpu {
+        session.register_render_job_host(solidcraft_gpu::path::host().map_err(|e| e.to_string())?).map_err(|e| e.to_string())?;
+    }
+    session.execute("render.scene", &json!({})).map_err(|e| e.to_string())?;
+    if setup.is_none() {
+        let camera = if let Some(camera) = session.camera {
+            camera
+        } else {
+            let mut camera = RenderSetup::default().camera;
+            camera.fit(&solidcraft_engine::product_scene::extract(&session).map_err(|e| e.to_string())?.bounds);
+            camera
+        };
+        params["settings"]["camera"] = json!(camera);
+    }
    let preflight = session.execute("render.preflight", &params).map_err(|e| e.to_string())?;
    let started = session.execute("render.start", &params).map_err(|e| e.to_string())?;
    let id: JobId = serde_json::from_value(started["job"].clone()).map_err(|e| e.to_string())?;
@@ -92,7 +92,7 @@ fn designs() -> Vec<(String, PathBuf)> {
    add("regressions", root.join("examples/regressions"), "json");
    add("demo", root.join("examples/demo"), "json");
    add("typical", root.join("tests/action_matrix/designs"), "json");
-    add("demo", root.join("tests/action_matrix/designs"), "solidcraft");
+    add("demo", root.join("tests/action_matrix/designs"), solidcraft_engine::io::DESIGN_EXT);
    let mut cases: Vec<PathBuf> =
        std::fs::read_dir(root.join("tests/oracle")).unwrap().flatten().map(|e| e.path()).filter(|p| p.join("recipe.json").is_file()).collect();
    cases.sort();
@@ -105,7 +105,7 @@ fn designs() -> Vec<(String, PathBuf)> {
 /// Build a design from its file.
 fn load(path: &Path) -> Result<Session, String> {
    let mut s = Session::default();
-    if path.extension().is_some_and(|x| x == "solidcraft") {
+    if solidcraft_engine::io::is_design_container_path(path) {
        s.execute("doc.open", &json!({"path": path.to_string_lossy()})).map_err(|e| e.to_string())?;
        return Ok(s);
    }
@@ -395,8 +395,10 @@ fn actions(s: &Session) -> Vec<Action> {
            let r = round3((shortest * 0.1).max(0.01));
            let mut add = |action, act| out.push(Action { entity: entity.clone(), action, act });
            if !smooth(e, mid) {
-                add("edge.fillet", Act::Run("solid.fillet", json!({"edges": [pt(mid)], "radius": r})));
-                add("edge.chamfer", Act::Run("solid.chamfer", json!({"edges": [pt(mid)], "distance": r})));
+                // The midpoint is interior to this edge, but other bodies (including component
+                // copies in their local frames) can have coincident edges. Retain the picked body.
+                add("edge.fillet", Act::Run("solid.fillet", json!({"body": world, "edges": [pt(mid)], "radius": r})));
+                add("edge.chamfer", Act::Run("solid.chamfer", json!({"body": world, "edges": [pt(mid)], "distance": r})));
            }
            let dir = straight(pts);
            if dir.is_some() {
@@ -1278,6 +1280,41 @@ fn rectangle(plane: Value, p0: [f64; 2], p1: [f64; 2]) -> [Value; 3] {
    ]
 }

+#[test]
+fn edge_round_actions_keep_the_picked_body() {
+    for (corner, length) in [([10, 0, 20], 4), ([0, 0, 0], 20)] {
+        let mut s = Session::default();
+        s.execute("solid.box", &json!({"length": 20, "width": 20, "height": 20, "body_name": "Plate"})).unwrap();
+        s.execute(
+            "solid.box",
+            &json!({"corner": corner, "length": length, "width": length, "height": length, "body_name": "Block", "operation": "new"}),
+        )
+        .unwrap();
+        let mut tried = 0;
+        for a in actions(&s) {
+            if !a.entity.starts_with("Plate/") || !matches!(a.action, "edge.chamfer" | "edge.fillet") {
+                continue;
+            }
+            let Act::Run(id, ref p) = a.act else { continue };
+            let q = &p["edges"][0];
+            let x = q[0].as_f64().unwrap();
+            if q[1] != 0.0 || q[2] != 20.0 || !(0.0..20.0).contains(&x) {
+                continue;
+            }
+            // Block either meets this midpoint or coincides with the whole edge.
+            assert_eq!(p["body"], "Plate", "{}: {p}", a.action);
+            assert_eq!(q, &json!([10.0, 0.0, 20.0]));
+            let mut unscoped = p.clone();
+            unscoped.as_object_mut().unwrap().remove("body");
+            let err = s.scratch().execute(id, &unscoped).unwrap_err().to_string();
+            assert!(err.contains("edges meet"), "{err}");
+            perform(&mut s.scratch(), &a.act, &errors(&s)).unwrap();
+            tried += 1;
+        }
+        assert_eq!(tried, 2);
+    }
+}
+
 #[test]
 fn a_fillet_or_chamfer_on_one_edge_ending_at_a_cylinder() {
    for (cmd, size) in [("solid.fillet", "radius"), ("solid.chamfer", "distance")] {
@@ -1412,7 +1449,7 @@ fn a_sketch_on_a_patterned_boss_top() {
 fn construction_geometry_and_holes_on_a_moved_component() {
    let moved = || {
        vec![
-            json!({"command": "component.create", "params": {"name": "Arm"}}),
+            json!({"command": "component.create", "params": {"name": "Arm", "grounded": false}}),
            json!({"command": "solid.box", "params": {"corner": [20, 0, 0], "length": 10, "width": 4, "height": 4, "body_name": "ArmBody"}}),
            json!({"command": "component.activate", "params": {"component": 0}}),
            json!({"command": "occurrence.move", "params": {"occurrence": "Arm:1", "translate": [0, 50, 0]}}),
@@ -1521,7 +1558,7 @@ fn sketches_on_loft_and_sweep_faces() {
 #[test]
 fn press_pull_on_the_pi_case_floor() {
    reproduces(
-        Some("tests/action_matrix/designs/pi-case.solidcraft"),
+        Some("tests/action_matrix/designs/pi-case.sc"),
        json!([{"command": "solid.press_pull", "params": {"face": [30, 20, 0], "distance": 1}}]),
    );
 }
@@ -1,6 +1,6 @@
 {"commands": [
 {"command": "solid.box", "params": {"length": 10, "width": 10, "height": 10, "body_name": "Base"}},
- {"command": "component.create", "params": {"name": "Arm"}},
+ {"command": "component.create", "params": {"name": "Arm", "grounded": false}},
 {"command": "solid.box", "params": {"corner": [20, 0, 0], "length": 10, "width": 4, "height": 4, "body_name": "ArmBody"}},
 {"command": "solid.fillet", "params": {"edges": [[25, 4, 4]], "radius": 1}},
 {"command": "component.activate", "params": {"component": 0}},
@@ -0,0 +1,190 @@
+//! An explicit help request prints usage to stdout and succeeds; an unknown command still fails.
+
+use std::process::{Command, Stdio};
+use std::time::{Duration, Instant};
+
+/// Every command the CLI takes, with the name its own usage names: `inspect` is `eval`, and
+/// `licenses` is `licences`.
+const COMMANDS: &[(&str, &str)] = &[
+    ("run", "run"),
+    ("eval", "eval"),
+    ("inspect", "eval"),
+    ("script", "script"),
+    ("bench-open", "bench-open"),
+    ("bench-agent", "bench-agent"),
+    ("snapshot", "snapshot"),
+    ("render", "render"),
+    ("exec", "exec"),
+    ("commands", "commands"),
+    ("recipe", "recipe"),
+    ("oracle", "oracle"),
+    ("fuzz", "fuzz"),
+    ("fuzz-one", "fuzz-one"),
+    ("mcp", "mcp"),
+    ("crashes", "crashes"),
+    ("licences", "licences"),
+    ("licenses", "licences"),
+    ("gpu", "gpu"),
+    ("icon", "icon"),
+    ("bench-edit", "bench-edit"),
+    ("save-stress", "save-stress"),
+];
+
+/// The commands the usage lists: the aliases answer to another command's name.
+const LISTED: &[&str] = &[
+    "run",
+    "eval",
+    "script",
+    "bench-open",
+    "bench-agent",
+    "snapshot",
+    "render",
+    "exec",
+    "commands",
+    "recipe",
+    "oracle",
+    "fuzz",
+    "mcp",
+    "crashes",
+    "licences",
+    "gpu",
+    "icon",
+];
+
+/// The command names a text mentions after `solidcraft-cli `, each one only once.
+fn mentioned(text: &str) -> Vec<&str> {
+    let mut names: Vec<&str> = text.split("solidcraft-cli ").skip(1).filter_map(|rest| rest.split_whitespace().next()).collect();
+    names.sort_unstable();
+    names.dedup();
+    names
+}
+
+/// Runs the binary and waits at most `limit` for it to finish. `None` means it was still
+/// running and was killed: the fuzz run `fuzz --help` used to start goes on for minutes.
+fn run_within(limit: Duration, args: &[&str]) -> Option<(Option<i32>, String, String)> {
+    let mut child = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(args).stdout(Stdio::piped()).stderr(Stdio::piped()).spawn().unwrap();
+    let started = Instant::now();
+    loop {
+        match child.try_wait().unwrap() {
+            Some(status) => {
+                let out = child.wait_with_output().unwrap();
+                return Some((status.code(), String::from_utf8_lossy(&out.stdout).into_owned(), String::from_utf8_lossy(&out.stderr).into_owned()));
+            }
+            None if started.elapsed() >= limit => {
+                let _ = child.kill();
+                let _ = child.wait();
+                return None;
+            }
+            None => std::thread::sleep(Duration::from_millis(25)),
+        }
+    }
+}
+
+#[test]
+fn help_prints_usage_and_succeeds() {
+    for arg in ["--help", "-h", "help"] {
+        let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).arg(arg).output().unwrap();
+        assert!(output.status.success(), "{arg}: {}", String::from_utf8_lossy(&output.stderr));
+        let stdout = String::from_utf8_lossy(&output.stdout);
+        assert!(stdout.starts_with("usage:"), "{arg}: {stdout}");
+        assert!(stdout.contains("solidcraft-cli run"), "{arg}: {stdout}");
+        assert!(output.stderr.is_empty(), "{arg}: {}", String::from_utf8_lossy(&output.stderr));
+    }
+}
+
+#[test]
+fn unknown_command_still_fails_with_usage() {
+    let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).arg("--not-a-command").output().unwrap();
+    assert!(!output.status.success());
+    assert!(output.stdout.is_empty());
+    assert!(String::from_utf8_lossy(&output.stderr).starts_with("error: usage:"));
+}
+
+#[test]
+fn every_command_prints_its_own_usage() {
+    for (cmd, named) in COMMANDS {
+        for flag in ["--help", "-h"] {
+            let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args([*cmd, flag]).output().unwrap();
+            assert!(output.status.success(), "{cmd} {flag}: {}", String::from_utf8_lossy(&output.stderr));
+            let stdout = String::from_utf8_lossy(&output.stdout);
+            assert!(stdout.starts_with("usage:"), "{cmd} {flag}: {stdout}");
+            assert_eq!(mentioned(&stdout), vec![*named], "{cmd} {flag} printed another command's usage: {stdout}");
+            assert!(output.stderr.is_empty(), "{cmd} {flag}: {}", String::from_utf8_lossy(&output.stderr));
+        }
+    }
+}
+
+#[test]
+fn the_top_level_usage_still_lists_every_command() {
+    let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).arg("--help").output().unwrap();
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    for cmd in LISTED {
+        assert!(stdout.contains(&format!("solidcraft-cli {cmd}")), "{cmd}: {stdout}");
+    }
+}
+
+#[test]
+fn fuzz_help_does_not_start_a_fuzz_run() {
+    let Some((code, stdout, stderr)) = run_within(Duration::from_secs(20), &["fuzz", "--help"]) else {
+        panic!("`fuzz --help` kept running: it started a fuzz run instead of printing the usage");
+    };
+    assert_eq!(code, Some(0), "{stderr}");
+    assert!(stdout.starts_with("usage:"), "{stdout}");
+    assert_eq!(mentioned(&stdout), vec!["fuzz"], "{stdout}");
+    assert!(stderr.is_empty(), "{stderr}");
+}
+
+#[test]
+fn fuzz_refuses_an_argument_it_does_not_take() {
+    for arg in ["--not-a-flag", "stray"] {
+        let Some((code, _stdout, stderr)) = run_within(Duration::from_secs(20), &["fuzz", arg]) else {
+            panic!("`fuzz {arg}` kept running: it started a fuzz run instead of refusing the argument");
+        };
+        assert_ne!(code, Some(0), "`fuzz {arg}` succeeded");
+        assert!(stderr.contains(arg), "`fuzz {arg}`: {stderr}");
+    }
+}
+
+#[test]
+fn render_help_keeps_the_registered_gpu_request_controls() {
+    for args in [vec!["--help"], vec!["render", "--help"]] {
+        let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(&args).output().unwrap();
+        assert!(output.status.success(), "{args:?}: {}", String::from_utf8_lossy(&output.stderr));
+        assert!(output.stderr.is_empty());
+        let stdout = String::from_utf8_lossy(&output.stdout);
+        for flag in ["--progressive", "--samples", "--max-depth", "--seed", "--exposure", "--lighting", "--environment", "--tone-map"] {
+            assert!(stdout.contains(flag), "{args:?} lost {flag}: {stdout}");
+        }
+    }
+}
+
+/// `--max-file-size` (#4086), with any command: the usage names it, a bad size stops the run
+/// with the reason, and a design over the default limit opens once the flag raises it.
+#[test]
+fn max_file_size_raises_the_limit_and_refuses_bad_sizes() {
+    let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).arg("--help").output().unwrap();
+    assert!(String::from_utf8_lossy(&output.stdout).contains("--max-file-size"));
+    for size in ["17GB", "2", "lots"] {
+        let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(["--max-file-size", size, "exec", "file.new"]).output().unwrap();
+        assert!(!output.status.success(), "{size} was accepted");
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        assert!(stderr.starts_with("error: --max-file-size"), "{size}: {stderr}");
+    }
+    let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(["exec", "file.new", "--max-file-size=2GB"]).output().unwrap();
+    assert!(output.status.success(), "{}", String::from_utf8_lossy(&output.stderr));
+
+    // A sparse design file just over the default 256 MB: refused unread, then read with the flag
+    // (and refused for what it holds, which is no design).
+    let dir = std::env::temp_dir().join(format!("solidcraft-cli-4086-{}", std::process::id()));
+    std::fs::create_dir_all(&dir).unwrap();
+    let path = dir.join("big.solidcraft");
+    std::fs::File::create(&path).unwrap().set_len((256 << 20) + 1).unwrap();
+    let path = path.to_string_lossy().to_string();
+    let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(["eval", &path]).output().unwrap();
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    assert!(!output.status.success() && stderr.contains("too large") && stderr.contains("--max-file-size"), "{stderr}");
+    let output = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(["--max-file-size", "1GB", "eval", &path]).output().unwrap();
+    let stderr = String::from_utf8_lossy(&output.stderr);
+    assert!(!output.status.success() && !stderr.contains("too large"), "{stderr}");
+    let _ = std::fs::remove_dir_all(&dir);
+}
@@ -139,11 +139,13 @@ fn eval_json_out_holds_what_stdout_would() {
 fn json_out_needs_a_file_and_fails_when_it_cannot_write() {
    let dir = Scratch::new();
    let script = dir.script();
-    for cmd in ["run", "eval"] {
-        let output = cli().arg(cmd).arg(&script).arg("--json-out").output().unwrap();
-        assert_eq!(output.status.code(), Some(1), "{cmd}");
-        assert!(String::from_utf8_lossy(&output.stderr).contains("--json-out needs a FILE"), "{cmd}");
-        assert!(output.stdout.is_empty(), "{cmd}");
+    for cmd in ["run", "eval", "inspect"] {
+        for trailing in [&[][..], &["--in"][..]] {
+            let output = cli().arg(cmd).arg(&script).arg("--json-out").args(trailing).output().unwrap();
+            assert_eq!(output.status.code(), Some(1), "{cmd}");
+            assert!(String::from_utf8_lossy(&output.stderr).contains("--json-out needs a FILE"), "{cmd}");
+            assert!(output.stdout.is_empty(), "{cmd}");
+        }

        let missing = dir.0.join("missing").join("out.json");
        let output = cli().arg(cmd).arg(&script).arg("--json-out").arg(&missing).output().unwrap();
@@ -89,3 +89,177 @@ fn mcp_connect_without_a_port_is_refused_at_start() {
        assert!(stderr.contains("HOST:PORT"), "{addr}: {stderr}");
    }
 }
+
+/// `mcp` with no arguments finds the running app through the discovery file and uses that
+/// launch's token; with no app behind the file it stays a headless session.
+#[test]
+fn mcp_without_arguments_finds_the_running_app() {
+    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+    let port = listener.local_addr().unwrap().port();
+    let control_dir = std::env::temp_dir().join(format!("solidcraft-mcp-discover-{}-{port}", std::process::id()));
+    std::fs::create_dir_all(&control_dir).unwrap();
+    let token = "fedcba9876543210".repeat(4);
+    std::fs::write(control_dir.join(format!("{port}.token")), &token).unwrap();
+    std::fs::write(control_dir.join("current.port"), format!("{port}\n")).unwrap();
+    let app = std::thread::spawn(move || {
+        // The discovery probe connects and leaves without a request; the tool call follows.
+        let (stream, line) = loop {
+            let (stream, _) = listener.accept().unwrap();
+            let mut line = String::new();
+            BufReader::new(stream.try_clone().unwrap()).read_line(&mut line).unwrap();
+            if !line.is_empty() {
+                break (stream, line);
+            }
+        };
+        let req: Value = serde_json::from_str(&line).unwrap();
+        let ok = req["token"] == json!(token);
+        let reply = json!({"id": req["id"], "ok": ok, "result": {"bodies": [], "method": req["method"]}, "error": "unauthorized"});
+        writeln!(&stream, "{reply}").unwrap();
+    });
+    let mut child = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli"))
+        .args(["mcp", "--allow-any-path"])
+        .env("SOLIDCRAFT_CONTROL_DIR", &control_dir)
+        .env_remove("SOLIDCRAFT_CONTROL_TOKEN")
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+        .unwrap();
+    let mut stdin = child.stdin.take().unwrap();
+    let mut stdout = BufReader::new(child.stdout.take().unwrap());
+    writeln!(stdin, "{}", json!({"jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": {"name": "measure", "arguments": {}}})).unwrap();
+    let mut line = String::new();
+    stdout.read_line(&mut line).unwrap();
+    let r: Value = serde_json::from_str(&line).unwrap_or_else(|e| panic!("{e}: {line:?}"));
+    assert_ne!(r["result"]["isError"], true, "{r}");
+    assert!(r["result"]["content"][0]["text"].as_str().unwrap_or_default().contains("engine.execute"), "{r}");
+    app.join().unwrap();
+    drop(stdin);
+    assert!(child.wait().unwrap().success());
+
+    // The file names a port nothing listens on (the app crashed): a headless session instead.
+    let closed = TcpListener::bind("127.0.0.1:0").unwrap();
+    let dead = closed.local_addr().unwrap().port();
+    drop(closed);
+    std::fs::write(control_dir.join("current.port"), format!("{dead}\n")).unwrap();
+    let out = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli"))
+        .args(["mcp", "--allow-any-path"])
+        .env("SOLIDCRAFT_CONTROL_DIR", &control_dir)
+        .stdin(Stdio::null())
+        .output()
+        .unwrap();
+    assert!(!String::from_utf8_lossy(&out.stderr).contains("bridged to the running app"), "{}", String::from_utf8_lossy(&out.stderr));
+    std::fs::remove_dir_all(&control_dir).ok();
+}
+
+/// `mcp setup` against a temporary home: the client folders it finds are the only ones it writes.
+mod setup {
+    use serde_json::{Value, json};
+    use std::path::{Path, PathBuf};
+    use std::process::Command;
+
+    fn home(name: &str) -> PathBuf {
+        let h = std::env::temp_dir().join(format!("solidcraft-mcp-setup-{name}-{}", std::process::id()));
+        let _ = std::fs::remove_dir_all(&h);
+        std::fs::create_dir_all(&h).unwrap();
+        h
+    }
+
+    fn run(home: &Path, args: &[&str]) -> std::process::Output {
+        Command::new(env!("CARGO_BIN_EXE_solidcraft-cli"))
+            .args(["mcp", "setup"])
+            .args(args)
+            .env_clear()
+            .env("HOME", home)
+            .env("USERPROFILE", home)
+            .env("APPDATA", home.join("AppData/Roaming"))
+            .env("LOCALAPPDATA", home.join("AppData/Local"))
+            .env("XDG_CONFIG_HOME", home.join(".config"))
+            .env("PATH", "")
+            .output()
+            .unwrap()
+    }
+
+    fn json_of(p: &Path) -> Value {
+        serde_json::from_str(&std::fs::read_to_string(p).unwrap()).unwrap()
+    }
+
+    fn exe() -> String {
+        let p = Path::new(env!("CARGO_BIN_EXE_solidcraft-cli")).canonicalize().unwrap();
+        p.to_string_lossy().trim_start_matches(r"\\?\").to_owned()
+    }
+
+    #[test]
+    fn merges_into_opencode_and_cursor_keeping_other_servers() {
+        let h = home("merge");
+        let oc = h.join(".config/opencode");
+        std::fs::create_dir_all(&oc).unwrap();
+        let old = json!({"$schema": "https://opencode.ai/config.json", "theme": "x", "mcp": {"other": {"type": "local", "command": ["o"]}}});
+        std::fs::write(oc.join("opencode.json"), old.to_string()).unwrap();
+        std::fs::create_dir_all(h.join(".cursor")).unwrap();
+        std::fs::write(h.join(".cursor/mcp.json"), r#"{"mcpServers": {"other": {"command": "o"}}}"#).unwrap();
+
+        let out = run(&h, &["--live"]);
+        assert!(out.status.success(), "{}", String::from_utf8_lossy(&out.stderr));
+        let v = json_of(&oc.join("opencode.json"));
+        assert_eq!(v["theme"], "x");
+        assert_eq!(v["mcp"]["other"], old["mcp"]["other"]);
+        assert_eq!(v["mcp"]["solidcraft"], json!({"type": "local", "command": [exe(), "mcp"], "enabled": true}));
+        assert_eq!(v["mcp"]["solidcraft-live"]["command"], json!([exe(), "mcp", "--connect", "127.0.0.1:7878"]));
+        assert_eq!(json_of(&oc.join("opencode.json.bak")), old);
+        let c = json_of(&h.join(".cursor/mcp.json"));
+        assert_eq!(c["mcpServers"]["other"], json!({"command": "o"}));
+        assert_eq!(c["mcpServers"]["solidcraft"], json!({"command": exe(), "args": ["mcp"]}));
+
+        // Codex (TOML) and Claude Code (a big file the CLI owns) are edited in place too.
+        std::fs::create_dir_all(h.join(".codex")).unwrap();
+        std::fs::write(h.join(".codex/config.toml"), "# mine\nmodel = \"x\"\n").unwrap();
+        let cc = "{\n  \"numStartups\": 3,\n  \"projects\": {}\n}\n";
+        std::fs::write(h.join(".claude.json"), cc).unwrap();
+        assert!(run(&h, &[]).status.success());
+        let toml = std::fs::read_to_string(h.join(".codex/config.toml")).unwrap();
+        assert!(toml.starts_with("# mine\nmodel = \"x\"\n") && toml.contains("[mcp_servers.solidcraft]"), "{toml}");
+        let c = json_of(&h.join(".claude.json"));
+        assert_eq!(c["numStartups"], 3);
+        assert_eq!(c["mcpServers"]["solidcraft"], json!({"type": "stdio", "command": exe(), "args": ["mcp"]}));
+        assert_eq!(std::fs::read_to_string(h.join(".claude.json.bak")).unwrap(), cc);
+
+        // Running again updates the same entries and leaves one of each.
+        assert!(run(&h, &[]).status.success());
+        assert_eq!(json_of(&h.join(".cursor/mcp.json"))["mcpServers"].as_object().unwrap().len(), 3);
+    }
+
+    #[test]
+    fn dry_run_writes_nothing_and_missing_clients_are_skipped() {
+        let h = home("dry");
+        std::fs::create_dir_all(h.join(".cursor")).unwrap();
+        let out = run(&h, &["--dry-run"]);
+        assert!(out.status.success());
+        let text = String::from_utf8_lossy(&out.stdout);
+        assert!(text.contains("would write") && text.contains("solidcraft"), "{text}");
+        assert!(!h.join(".cursor/mcp.json").exists());
+        assert!(!h.join(".config/opencode").exists(), "OpenCode was not installed, so nothing is created for it");
+        let out = run(&h, &["--client", "claude-desktop"]);
+        assert!(String::from_utf8_lossy(&out.stdout).contains("not found"));
+    }
+
+    #[test]
+    fn a_file_that_is_not_json_is_left_alone() {
+        let h = home("bad");
+        std::fs::create_dir_all(h.join(".cursor")).unwrap();
+        std::fs::write(h.join(".cursor/mcp.json"), "{ // comment").unwrap();
+        let out = run(&h, &[]);
+        assert!(!out.status.success());
+        assert_eq!(std::fs::read_to_string(h.join(".cursor/mcp.json")).unwrap(), "{ // comment");
+    }
+
+    #[test]
+    fn claude_desktop_msix_folder_is_found() {
+        let h = home("msix");
+        let pkg = h.join("AppData/Local/Packages/Claude_abc/LocalCache/Roaming/Claude");
+        std::fs::create_dir_all(&pkg).unwrap();
+        // The MSIX folder is only read through LOCALAPPDATA, set for every platform here.
+        assert!(run(&h, &["--client", "claude-desktop"]).status.success());
+        assert!(json_of(&pkg.join("claude_desktop_config.json"))["mcpServers"]["solidcraft"].is_object());
+    }
+}
@@ -0,0 +1,9 @@
+//! Explicit native GPU registration must not change bridged MCP ownership.
+use std::process::Command;
+#[test]
+fn connected_application_rejects_headless_gpu_installation_before_connecting() {
+    let result = Command::new(env!("CARGO_BIN_EXE_solidcraft-cli")).args(["mcp", "--render-gpu", "--connect", "127.0.0.1:1"]).output().unwrap();
+    assert!(!result.status.success());
+    let message = String::from_utf8_lossy(&result.stderr);
+    assert!(message.contains("connected application owns its own device"), "{message}");
+}
@@ -7,7 +7,7 @@ use std::sync::Arc;

 use serde_json::{Value, json};
 use solidcraft_engine::Session;
-use solidcraft_engine::doc::{ModelBody, ModelState};
+use solidcraft_engine::doc::{ModelBody, ModelState, SavedModel};

 fn corpus() -> Vec<PathBuf> {
    let dir = Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/corpus");
@@ -149,6 +149,87 @@ fn imported_assemblies_open_from_their_model_as_evaluated() {
    check("imported hinge", s);
 }

+/// `built` saved with `saved`, a model of it that keeps only some states (as a file without room
+/// for all of them does, #3220), opens as the design evaluated again: evaluating just the
+/// features whose state the file left out, then after suppressing a feature at, before or after
+/// each state it kept, after undoing that, and with the marker moved there and back.
+fn check_thinned(name: &str, built: &Session, saved: &SavedModel) {
+    let design = built.design();
+    let bytes =
+        solidcraft_engine::io::write_design_container_with_cache(&design, solidcraft_engine::io::DesignCompression::Fast, None, Some(saved)).unwrap();
+    assert!(solidcraft_engine::io::read_design_geometry(&bytes).is_some(), "{name}: the file keeps the final state");
+    let path = temp(&name.replace(' ', "-"));
+    std::fs::write(&path, &bytes).unwrap();
+    let mut cached = open(&path);
+    let mut rebuilt = Session::new(solidcraft_engine::io::read_design(&bytes).unwrap());
+    let features = saved.records["features"].as_array().unwrap();
+    let unkept = features.iter().filter(|f| f["skipped"] == false && f.get("state").is_none()).count();
+    assert!(unkept > 0, "{name}: some states left out");
+    assert_eq!(cached.model.recomputed, unkept, "{name}: evaluated just the features whose state the file left out");
+    assert_eq!(model(name, &cached), model(name, &rebuilt), "{name}: opened from the file's model");
+    let n = cached.doc.features.len();
+    let mut at: Vec<usize> = features
+        .iter()
+        .enumerate()
+        .filter(|(_, f)| f["skipped"] == false && f.get("state").is_some())
+        .flat_map(|(k, _)| [k.saturating_sub(1), k, k + 1])
+        .filter(|i| *i < n)
+        .collect();
+    at.dedup();
+    for i in at {
+        let edit = json!({"feature": cached.doc.features[i].id, "suppressed": true});
+        let (a, b) = (cached.execute("timeline.suppress", &edit), rebuilt.execute("timeline.suppress", &edit));
+        assert_eq!(a.is_ok(), b.is_ok(), "{name}: suppressing feature {i}");
+        assert_eq!(model(name, &cached), model(name, &rebuilt), "{name}: feature {i} suppressed");
+        if a.is_ok() {
+            cached.execute("edit.undo", &json!({})).unwrap();
+            rebuilt.execute("edit.undo", &json!({})).unwrap();
+            assert_eq!(model(name, &cached), model(name, &rebuilt), "{name}: suppressing feature {i} undone");
+        }
+        for marker in [json!({"position": i}), json!({})] {
+            cached.execute("timeline.rollback", &marker).unwrap();
+            rebuilt.execute("timeline.rollback", &marker).unwrap();
+            assert_eq!(model(name, &cached), model(name, &rebuilt), "{name}: the marker at {marker}, from feature {i}");
+        }
+    }
+    let _ = std::fs::remove_file(&path);
+}
+
+/// A model too big for its file keeps the final state, then the slowest features' states as fit
+/// (#3220). Both the smallest such model (the final state, and states that add no body to it)
+/// and one that keeps more open as the design evaluated again. The placed components' design has
+/// a cut whose fingerprint reads where the bodies before it lie, which a state left out does not
+/// say until it is evaluated.
+#[test]
+fn thinned_models_open_as_evaluated() {
+    let corpus = Path::new(env!("CARGO_MANIFEST_DIR")).join("tests/corpus/components-arm.solidcraft");
+    for sample in ["Sample Plate", "Plastic Enclosure", "components-arm"] {
+        let built = match solidcraft_engine::sample::samples().into_iter().find(|s| s.name == sample) {
+            Some(s) => {
+                let mut built = Session::default();
+                for c in (s.script)()["commands"].as_array().unwrap() {
+                    built.execute(c["command"].as_str().unwrap(), &c["params"]).unwrap();
+                }
+                built
+            }
+            None => open(&corpus),
+        };
+        let saved = built.model.saved(&built.design()).unwrap();
+        // Every body a megabyte (the records fit in the room left over): each budget keeps one more
+        // body's worth of states.
+        let body = 1 << 20;
+        let pieces: Vec<Vec<(usize, usize)>> = (0..saved.bodies.len()).map(|i| vec![(i, body)]).collect();
+        let thinned: Vec<SavedModel> =
+            (0..=saved.bodies.len()).filter_map(|n| saved.thinned(&pieces, n * body + body - 1).map(|(m, _, _)| m)).collect();
+        let kept = |m: &SavedModel| m.records["features"].as_array().unwrap().iter().filter(|f| f.get("state").is_some()).count();
+        let smallest = thinned.first().unwrap();
+        assert!(smallest.records["states"].as_array().unwrap().len() < saved.records["states"].as_array().unwrap().len(), "{sample}");
+        let more = thinned.iter().find(|m| kept(m) > kept(smallest) && kept(m) < built.doc.features.len()).unwrap();
+        check_thinned(&format!("{sample} smallest"), &built, smallest);
+        check_thinned(&format!("{sample} thinned"), &built, more);
+    }
+}
+
 /// Opened from its model, a design evaluates only from the first feature an edit changes: the
 /// saved states before it are kept as they were read (the same states, not evaluated again).
 #[test]
@@ -207,3 +288,47 @@ fn undoing_an_edit_after_opening_reuses_the_saved_results() {
    let _ = std::fs::remove_file(&path);
    let _ = std::fs::remove_file(format!("{}.bak", path.display()));
 }
+
+/// A design saved before body names were pinned (#6403) pins them as it opens, as its first
+/// command would, and opening it is no change. That command pinned them as part of itself, so
+/// undoing it went back to the unpinned design, which no evaluated result matched: the first
+/// undo after opening from the command line evaluated every feature again (82-93 s in a
+/// 5,484-feature design); `doc.open` pinned them after opening, which marked the design changed.
+#[test]
+fn a_design_saved_before_names_were_pinned_opens_pinned_and_unchanged() {
+    let plate = solidcraft_engine::sample::samples().into_iter().find(|s| s.name == "Sample Plate").unwrap();
+    let mut built = Session::default();
+    for c in (plate.script)()["commands"].as_array().unwrap() {
+        built.execute(c["command"].as_str().unwrap(), &c["params"]).unwrap();
+    }
+    let mut doc = built.design().into_owned();
+    for f in &mut doc.features {
+        f.body_names.clear();
+    }
+    doc.reserved_body_names.clear();
+    let unpinned = Session::new(doc);
+    let design = unpinned.design();
+    let saved = unpinned.model.saved(&design).unwrap();
+    let bytes = solidcraft_engine::io::write_design_container_with_cache(&design, solidcraft_engine::io::DesignCompression::Fast, None, Some(&saved))
+        .unwrap();
+    let path = temp("unpinned");
+    std::fs::write(&path, &bytes).unwrap();
+    let file = path.to_string_lossy().to_string();
+    // As the command line opens a design (`load`), and as the app does (`doc.open`).
+    let (doc, saved) = solidcraft_engine::io::read_design_file(&file, None::<fn(solidcraft_engine::io::DesignPreview)>).unwrap();
+    for (how, mut s) in [("opened_at", Session::opened_at(doc, saved.as_ref(), Some(&file))), ("doc.open", open(&path))] {
+        assert_eq!(s.model.last_recomputed, 0, "{how}: taken from the file");
+        assert!(s.doc.features.iter().any(|f| !f.body_names.is_empty()), "{how}: the names are pinned");
+        assert!(!s.is_dirty(), "{how}: opening is no change");
+        let read: Vec<Arc<ModelState>> = s.model.results.iter().map(|r| r.state.clone()).collect();
+        s.execute("solid.box", &json!({"length": 3, "width": 3, "height": 3, "operation": "new"})).unwrap();
+        // As in a large design, whose evaluation cache keeps only a few results: undo finds the
+        // results in the model itself or evaluates them again.
+        *s.model.cache.lock().unwrap() = Default::default();
+        s.execute("edit.undo", &json!({})).unwrap();
+        assert_eq!(s.model.last_recomputed, 0, "{how}: the first undo evaluates nothing");
+        assert!(s.model.results.iter().zip(&read).all(|(r, st)| Arc::ptr_eq(&r.state, st)), "{how}: the states read from the file");
+        assert!(!s.is_dirty(), "{how}: undone to the design as opened");
+    }
+    let _ = std::fs::remove_file(&path);
+}
@@ -75,12 +75,15 @@ fn designs() -> Vec<(String, Session)> {
            .unwrap()
            .flatten()
            .map(|e| e.path())
-            .filter(|p| p.extension().is_some_and(|x| x == "solidcraft" || x == "json") && !p.to_string_lossy().ends_with(".expected.json"))
+            .filter(|p| {
+                (solidcraft_engine::io::is_design_container_path(p) || p.extension().is_some_and(|x| x == "json"))
+                    && !p.to_string_lossy().ends_with(".expected.json")
+            })
            .collect();
        files.sort();
        for p in files {
            let name = p.file_stem().unwrap_or_default().to_string_lossy().to_string();
-            let s = if p.extension().is_some_and(|x| x == "solidcraft") {
+            let s = if solidcraft_engine::io::is_design_container_path(&p) {
                open(&p)
            } else {
                let mut s = Session::default();
@@ -150,7 +153,7 @@ fn pi_case_faces_per_step_at_both_heights() {
    const FACES: [(usize, usize); 13] =
        [(2, 6), (3, 10), (4, 19), (5, 19), (6, 25), (7, 43), (8, 43), (9, 55), (10, 55), (11, 59), (12, 59), (13, 63), (14, 79)];
    let dir = scratch_dir("pi");
-    let design: Value = serde_json::from_slice(&std::fs::read(root().join("tests/action_matrix/designs/pi-case.solidcraft")).unwrap()).unwrap();
+    let design: Value = serde_json::from_slice(&std::fs::read(root().join("tests/action_matrix/designs/pi-case.sc")).unwrap()).unwrap();
    let at = |height: &str, file: &str| {
        let mut d = design.clone();
        for p in d["params"].as_array_mut().unwrap() {
@@ -22,6 +22,19 @@ impl Scratch {
        std::fs::write(&path, json!({"commands": [{"command": "solid.box", "params": {"length": 2, "width": 3, "height": 4}}]}).to_string()).unwrap();
        path
    }
+
+    fn saving_script(&self) -> (PathBuf, PathBuf) {
+        let path = self.0.join("saving.json");
+        let saved = self.0.join("script-ran.solidcraft");
+        std::fs::write(
+            &path,
+            json!({"commands": [{"command": "solid.box", "params": {"length": 2, "width": 3, "height": 4}},
+                {"command": "file.save_as", "params": {"path": saved}}]})
+            .to_string(),
+        )
+        .unwrap();
+        (path, saved)
+    }
 }

 impl Drop for Scratch {
@@ -43,10 +56,96 @@ fn body_count(path: &Path) -> Value {
    json_output(cli().arg("eval").arg(path).output().unwrap())["body_count"].clone()
 }

+#[test]
+fn run_rejects_invalid_options_before_script_execution_or_output_writes() {
+    let dir = Scratch::new();
+    let (script, script_saved) = dir.saving_script();
+    let cases = [
+        (&["--out"][..], "--out needs a value"),
+        (&["--save"][..], "--save needs a value"),
+        (&["--in"][..], "--in needs a value"),
+        (&["--out", "--quiet"][..], "--out needs a value"),
+        (&["--ouut", "part.step"][..], "doesn't take --ouut"),
+        (&["--unknown"][..], "doesn't take --unknown"),
+    ];
+    for existing in [false, true] {
+        let saved = dir.0.join(format!("{existing}.solidcraft"));
+        let exported = dir.0.join(format!("{existing}.step"));
+        let report = dir.0.join(format!("{existing}.json"));
+        let outputs = [&saved, &exported, &report];
+        if existing {
+            for path in outputs {
+                std::fs::write(path, b"existing output").unwrap();
+            }
+        }
+        for (extra, message) in cases {
+            let output = cli()
+                .arg("run")
+                .arg(&script)
+                .arg("--save")
+                .arg(&saved)
+                .arg("--out")
+                .arg(&exported)
+                .arg("--json-out")
+                .arg(&report)
+                .args(extra)
+                .output()
+                .unwrap();
+            assert_eq!(output.status.code(), Some(1), "{extra:?}");
+            assert!(String::from_utf8_lossy(&output.stderr).contains(message), "{extra:?}: {}", String::from_utf8_lossy(&output.stderr));
+            assert!(output.stdout.is_empty());
+            assert!(!script_saved.exists(), "invalid arguments must be rejected before the script runs");
+            for path in outputs {
+                if existing {
+                    assert_eq!(std::fs::read(path).unwrap(), b"existing output");
+                } else {
+                    assert!(!path.exists());
+                }
+            }
+        }
+    }
+}
+
+#[test]
+fn eval_and_inspect_reject_invalid_options_before_script_execution_or_reporting() {
+    let dir = Scratch::new();
+    let (script, script_saved) = dir.saving_script();
+    let cases = [
+        (&["--in"][..], "--in needs a value"),
+        (&["--in", "--quiet"][..], "--in needs a value"),
+        (&["--out", "part.step"][..], "doesn't take --out"),
+        (&["--unknown"][..], "doesn't take --unknown"),
+    ];
+    for command in ["eval", "inspect"] {
+        for existing in [false, true] {
+            let report = dir.0.join(format!("{command}-{existing}.json"));
+            if existing {
+                std::fs::write(&report, b"existing report").unwrap();
+            }
+            for (extra, message) in cases {
+                let output = cli().arg(command).arg(&script).arg("--json-out").arg(&report).args(extra).output().unwrap();
+                assert_eq!(output.status.code(), Some(1), "{command} {extra:?}");
+                assert!(
+                    String::from_utf8_lossy(&output.stderr).contains(message),
+                    "{command} {extra:?}: {}",
+                    String::from_utf8_lossy(&output.stderr)
+                );
+                assert!(output.stdout.is_empty());
+                assert!(!script_saved.exists(), "invalid arguments must be rejected before the script runs");
+                if existing {
+                    assert_eq!(std::fs::read(&report).unwrap(), b"existing report");
+                } else {
+                    assert!(!report.exists());
+                }
+            }
+        }
+    }
+}
+
 #[test]
 fn cli_loads_both_design_encodings_by_contents() {
    let dir = Scratch::new();
-    for extension in ["solidcraft", "solvecraft", "json"] {
+    for extension in ["sc", "solidcraft", "solvecraft", "json"] {
        let saved = dir.0.join(format!("box.{extension}"));
        json_output(cli().arg("run").arg(dir.script()).arg("--save").arg(&saved).output().unwrap());
        let bytes = std::fs::read(&saved).unwrap();
@@ -59,6 +158,84 @@ fn cli_loads_both_design_encodings_by_contents() {
    }
 }

+/// #1369: a pending concept that did not land in the numbered release must not be silently
+/// dropped on open/resave, in either encoding or before replacing an existing destination.
+#[test]
+fn unknown_pending_concepts_preserve_the_open_design_and_output_files() {
+    use solidcraft_engine::{Session, doc, io};
+
+    let dir = Scratch::new();
+    for version in [33, doc::format::FORMAT] {
+        let mut experimental = doc::Document::new("Experimental");
+        experimental.format = doc::format::format_string(version);
+        experimental.format_pending.push("experimental-card".into());
+        for (extension, bytes) in [("json", io::write_design(&experimental)), ("solidcraft", io::write_design_container(&experimental).unwrap())] {
+            let source = dir.0.join(format!("experimental-{version}.{extension}"));
+            std::fs::write(&source, &bytes).unwrap();
+            let mut session = Session::default();
+            session.execute("solid.box", &json!({"length": 2, "width": 3, "height": 4})).unwrap();
+            let original = session.doc.clone();
+            let original_path = session.path.clone();
+            let undo = session.undo.len();
+            let dirty = session.is_dirty();
+            let err = session.execute("doc.open", &json!({"path": source})).unwrap_err().to_string();
+            assert!(err.contains("experimental-card") && err.contains("update SolidCraft"), "{err}");
+            assert_eq!(session.doc, original);
+            assert_eq!(session.path, original_path);
+            assert_eq!(session.undo.len(), undo);
+            assert_eq!(session.is_dirty(), dirty);
+
+            for existing in [false, true] {
+                let destination = dir.0.join(format!("output-{version}-{extension}-{existing}.{extension}"));
+                let backup = io::backup_path(&destination);
+                if existing {
+                    std::fs::write(&destination, b"existing design").unwrap();
+                    std::fs::write(&backup, b"existing backup").unwrap();
+                }
+                let output = cli().args(["run", "--in"]).arg(&source).arg("--save").arg(&destination).output().unwrap();
+                assert_eq!(output.status.code(), Some(1));
+                let error = String::from_utf8_lossy(&output.stderr);
+                assert!(error.contains("experimental-card") && error.contains("update SolidCraft"), "{error}");
+                if existing {
+                    assert_eq!(std::fs::read(&destination).unwrap(), b"existing design");
+                    assert_eq!(std::fs::read(&backup).unwrap(), b"existing backup");
+                } else {
+                    assert!(!destination.exists() && !backup.exists());
+                }
+                assert_eq!(std::fs::read(&source).unwrap(), bytes);
+            }
+        }
+    }
+}
+
+#[test]
+fn known_pending_concepts_and_released_files_round_trip_with_inert_metadata() {
+    use solidcraft_engine::{doc, io};
+
+    let dir = Scratch::new();
+    let current = doc::Document::new("Supported");
+    let mut released = current.clone();
+    released.format = doc::format::format_string(33);
+    released.format_pending.clear();
+    let mut experimental = released.clone();
+    experimental.format_pending.push("reserved-body-names".into());
+    for (index, mut document) in [current, released, experimental].into_iter().enumerate() {
+        document.metadata.0.insert("com.example.tool".into(), json!({"format_pending": ["experimental-card"], "physical_card": {"density": 700}}));
+        for (extension, bytes) in [("json", io::write_design(&document)), ("solidcraft", io::write_design_container(&document).unwrap())] {
+            let source = dir.0.join(format!("supported-{index}.{extension}"));
+            let destination = dir.0.join(format!("resaved-{index}.{extension}"));
+            std::fs::write(&source, &bytes).unwrap();
+            let output = cli().args(["run", "--in"]).arg(&source).arg("--save").arg(&destination).output().unwrap();
+            assert!(output.status.success(), "{}", String::from_utf8_lossy(&output.stderr));
+            let reopened = io::read_design(&std::fs::read(&destination).unwrap()).unwrap();
+            assert_eq!(reopened.metadata, document.metadata);
+            assert_eq!(reopened.name, document.name);
+            assert_eq!(reopened.features, document.features);
+            assert_eq!(std::fs::read(&source).unwrap(), bytes);
+        }
+    }
+}
+
 #[test]
 fn results_still_save_and_export_the_script_once() {
    let dir = Scratch::new();
@@ -90,6 +267,110 @@ fn results_with_base_design_and_quiet_still_report_and_save() {
    assert_eq!(body_count(&base), 1);
 }

+/// `eval` and its alias must measure the script applied to the input design, rather than
+/// silently reporting the input alone (#6861).
+#[test]
+fn eval_runs_its_script_on_the_in_design() {
+    let dir = Scratch::new();
+    let base = dir.0.join("base.solidcraft");
+    let script = dir.0.join("add.json");
+    json_output(cli().arg("run").arg(dir.script()).arg("--save").arg(&base).output().unwrap());
+    let original = std::fs::read(&base).unwrap();
+    std::fs::write(
+        &script,
+        json!({"commands": [{"command": "solid.box", "params": {"length": 5, "width": 3, "height": 4, "corner": [10, 0, 0]}}]}).to_string(),
+    )
+    .unwrap();
+    for command in ["eval", "inspect"] {
+        // Both existing one-input forms still measure just the original body.
+        for input in [&base, &dir.script()] {
+            for named_input in [false, true] {
+                let mut c = cli();
+                c.arg(command);
+                if named_input {
+                    c.arg("--in");
+                }
+                let measured = json_output(c.arg(input).output().unwrap());
+                assert_eq!(measured["body_count"], 1);
+                assert!((measured["total"]["volume_mm3"].as_f64().unwrap() - 24.0).abs() < 1e-6);
+            }
+        }
+        for input_first in [false, true] {
+            for to_file in [false, true] {
+                let mut c = cli();
+                c.arg(command);
+                if input_first {
+                    c.arg("--in").arg(&base).arg(&script);
+                } else {
+                    c.arg(&script).arg("--in").arg(&base);
+                }
+                let report = dir.0.join("measurement.json");
+                if to_file {
+                    c.arg("--json-out").arg(&report);
+                }
+                let output = c.output().unwrap();
+                let measured = if to_file {
+                    assert!(output.status.success(), "{}", String::from_utf8_lossy(&output.stderr));
+                    assert!(output.stdout.is_empty());
+                    serde_json::from_slice(&std::fs::read(&report).unwrap()).unwrap()
+                } else {
+                    json_output(output)
+                };
+                assert_eq!(measured["body_count"], 2, "{command}, input_first={input_first}, to_file={to_file}");
+                assert!((measured["total"]["volume_mm3"].as_f64().unwrap() - 84.0).abs() < 1e-6);
+                assert_eq!(measured["timeline"].as_array().unwrap().len(), 2, "the script runs exactly once");
+                assert_eq!(std::fs::read(&base).unwrap(), original, "evaluation never saves its changes to the input");
+            }
+        }
+    }
+}
+
+#[test]
+fn eval_propagates_script_errors_before_writing_a_report() {
+    let dir = Scratch::new();
+    let base = dir.script();
+    let script = dir.0.join("bad.json");
+    for command in ["eval", "inspect"] {
+        for contents in ["{", r#"{"commands":[{"command":"missing.command","params":{}}]}"#] {
+            std::fs::write(&script, contents).unwrap();
+            let report = dir.0.join("report.json");
+            let output = cli().arg(command).arg(&script).arg("--in").arg(&base).arg("--json-out").arg(&report).output().unwrap();
+            assert_eq!(output.status.code(), Some(1));
+            assert!(!output.stderr.is_empty());
+            assert!(output.stdout.is_empty());
+            assert!(!report.exists());
+        }
+    }
+}
+
+#[test]
+fn eval_rejects_unknown_options_and_missing_input_values_before_writing_a_report() {
+    let dir = Scratch::new();
+    let script = dir.script();
+    let report = dir.0.join("report.json");
+    for command in ["eval", "inspect"] {
+        for (options, message) in [(&["--frobnicate", "1"][..], "doesn't take --frobnicate"), (&["--in"][..], "--in needs a value")] {
+            for options_first in [false, true] {
+                std::fs::write(&report, b"previous report").unwrap();
+                let mut c = cli();
+                c.arg(command);
+                if options_first {
+                    c.args(options).arg("--json-out").arg(&report).arg(&script);
+                } else {
+                    c.arg(&script).args(options).arg("--json-out").arg(&report);
+                }
+                // A following option also proves that --in cannot consume a flag as its value.
+                let output = c.output().unwrap();
+                assert_eq!(output.status.code(), Some(1), "{command}, {options:?}");
+                let error = String::from_utf8_lossy(&output.stderr);
+                assert!(error.contains(message), "{command}: {error}");
+                assert!(output.stdout.is_empty());
+                assert_eq!(std::fs::read(&report).unwrap(), b"previous report");
+            }
+        }
+    }
+}
+
 #[test]
 fn results_propagate_output_errors() {
    let dir = Scratch::new();
@@ -131,6 +412,11 @@ fn legacy_extension_and_format_tag_still_open() {
    assert_eq!(body_count(&resaved), 2);
    let reopened = solidcraft_engine::io::read_design(&std::fs::read(&resaved).unwrap()).unwrap();
    assert!(reopened.to_json().contains("\"solidcraft/"));
+    // `.solidcraft` (before `.sc`) opens as `--in` and as the design to evaluate; `.sc` too.
+    let current = dir.0.join("current.sc");
+    json_output(cli().args(["run", "--in"]).arg(&resaved).arg(dir.script()).arg("--save").arg(&current).output().unwrap());
+    assert_eq!(body_count(&current), 3);
+    assert!(solidcraft_engine::io::is_design_container(&std::fs::read(&current).unwrap()), "a .sc file is a design container");
 }

 /// `snapshot` starts from `--in` as `run` does (its script runs on that design), and refuses an
@@ -209,3 +495,247 @@ fn timings_and_profile_report_each_command() {
    assert!(!output.status.success());
    assert!(String::from_utf8_lossy(&output.stderr).contains("--timings needs a script"));
 }
+
+/// #6921: `--param-check` checks a script's steps against their contracts on every path `run`
+/// takes (a script alone, on an `--in` design or script, with `--results`, `--timings` or
+/// `--profile`), and a warning reaches stderr even when a later step fails.
+#[test]
+fn param_check_reaches_every_script_run_takes() {
+    let dir = Scratch::new();
+    let typo = dir.0.join("typo.json");
+    let step = json!({"command": "solid.box", "params": {"length": 2, "width": 3, "height": 4, "operaton": "new"}});
+    std::fs::write(&typo, json!({"commands": [step.clone()]}).to_string()).unwrap();
+    let base = dir.0.join("base.solidcraft");
+    json_output(cli().arg("run").arg(dir.script()).arg("--save").arg(&base).output().unwrap());
+    let saved = dir.0.join("saved.solidcraft");
+    let start = dir.script();
+    let (typo, base, saved_arg, start) = (typo.to_str().unwrap(), base.to_str().unwrap(), saved.to_str().unwrap(), start.to_str().unwrap());
+    let paths = [&[][..], &["--in", base], &["--in", start], &["--results"], &["--timings"], &["--timings", "--profile"]];
+    let run = |level: Option<&str>, extra: &[&str]| {
+        std::fs::remove_file(&saved).ok();
+        let check = level.map(|l| ["--param-check", l]).into_iter().flatten();
+        cli().args(["run", typo, "--save", saved_arg]).args(check).args(extra).output().unwrap()
+    };
+
+    // Off, the default: the step runs as it always has, without a word.
+    let off = run(None, &[]);
+    assert!(off.status.success() && !String::from_utf8_lossy(&off.stderr).contains("operaton"), "{off:?}");
+    assert_eq!(body_count(&saved), 1);
+
+    // Warn: each path runs the step, saves, and reports it on stderr; `--results` keeps it too.
+    for extra in paths {
+        let output = run(Some("warn"), extra);
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        assert!(output.status.success(), "{extra:?}: {stderr}");
+        assert!(stderr.contains("step 1: unknown key `operaton`; did you mean `operation`?"), "{extra:?}: {stderr}");
+        assert!(saved.exists(), "{extra:?}");
+        if extra == ["--results"] {
+            let results: Value = serde_json::from_slice(&output.stdout).unwrap();
+            assert!(results[0]["param_warnings"][0].as_str().is_some_and(|w| w.contains("operaton")), "{results}");
+        }
+    }
+
+    // Strict: on each path the run stops at the step, and nothing is written.
+    for extra in paths {
+        let output = run(Some("strict"), extra);
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        assert_eq!(output.status.code(), Some(1), "{extra:?}: {stderr}");
+        assert!(stderr.contains("unknown key `operaton`"), "{extra:?}: {stderr}");
+        assert!(!saved.exists(), "{extra:?}");
+    }
+
+    // Warn, with a later step that fails: the run fails, and the first step's warning is still
+    // reported, timed or not.
+    let failing = dir.0.join("failing.json");
+    let fail = json!({"command": "solid.extrude", "params": {"sketch": "Nope"}});
+    std::fs::write(&failing, json!({"commands": [step, fail]}).to_string()).unwrap();
+    for extra in [&[][..], &["--timings"]] {
+        let output = cli().arg("run").arg(&failing).args(["--param-check", "warn"]).args(extra).output().unwrap();
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        assert_eq!(output.status.code(), Some(1), "{extra:?}: {stderr}");
+        assert!(stderr.contains("step 1: unknown key `operaton`") && stderr.contains("no sketch `Nope`"), "{extra:?}: {stderr}");
+    }
+
+    // A level it doesn't know and a missing value fail.
+    for (bad, says) in [
+        (&["--param-check", "loud"][..], "--param-check wants off, warn or strict, not `loud`"),
+        (&["--param-check"], "run: --param-check wants off, warn or strict"),
+    ] {
+        let output = cli().args(["run", typo]).args(bad).output().unwrap();
+        let stderr = String::from_utf8_lossy(&output.stderr);
+        assert_eq!(output.status.code(), Some(1), "{bad:?}: {stderr}");
+        assert!(stderr.contains(says), "{bad:?}: {stderr}");
+    }
+}
+
+fn render_setup_script(dir: &Scratch, job: Value) -> PathBuf {
+    let path = dir.0.join("render.json");
+    std::fs::write(
+        &path,
+        json!({"commands":[
+            {"command":"solid.box","params":{"length":10,"width":10,"height":10}},
+            {"command":"render.settings.set","params":{"name":"Portable setup","set":{"width":16,"height":16,"job":job}}}
+        ]})
+        .to_string(),
+    )
+    .unwrap();
+    path
+}
+
+#[cfg(feature = "raytrace-cpu")]
+#[test]
+fn render_uses_typed_cpu_setups_from_scripts_and_saved_designs() {
+    for options in [json!({}), json!({"progressive":{"samples_per_pixel":3,"seed":81},"lights":[]})] {
+        let dir = Scratch::new();
+        let script = render_setup_script(&dir, json!({"method":"cpu_raytrace","options":options}));
+        let image = dir.0.join("script.png");
+        let result = json_output(
+            cli()
+                .arg("render")
+                .arg(&script)
+                .args(["--setup", "Portable setup", "--out"])
+                .arg(&image)
+                .env("SOLIDCRAFT_GPU", "must-not-be-read-for-cpu")
+                .output()
+                .unwrap(),
+        );
+        assert_eq!(result["preflight"]["resolved"]["executor"], "cpu-raytrace");
+        assert_eq!(result["export"]["frame"]["executor"], "cpu-raytrace");
+        assert_eq!(result["preflight"]["request"]["integrator"], "raytrace");
+        assert_eq!(result["preflight"]["request"]["raytrace"].get("progressive"), options.get("progressive"));
+        let png = image::load_from_memory(&std::fs::read(&image).unwrap()).unwrap();
+        assert_eq!((png.width(), png.height()), (16, 16));
+
+        let saved = dir.0.join("portable.solidcraft");
+        json_output(cli().arg("run").arg(&script).arg("--save").arg(&saved).output().unwrap());
+        let original = std::fs::read(&saved).unwrap();
+        let overridden = dir.0.join("overridden.png");
+        let result = json_output(
+            cli()
+                .arg("render")
+                .arg(&saved)
+                .args(["--setup", "Portable setup", "--out"])
+                .arg(&overridden)
+                .args(["--width", "12", "--height", "8", "--exposure", "1.25"])
+                .env("SOLIDCRAFT_GPU", "must-not-be-read-for-cpu")
+                .output()
+                .unwrap(),
+        );
+        assert_eq!(result["preflight"]["request"]["width"], 12);
+        assert_eq!(result["preflight"]["request"]["height"], 8);
+        assert_eq!(result["preflight"]["request"]["raytrace"]["exposure_ev"], 1.25);
+        assert_eq!(result["export"]["frame"]["executor"], "cpu-raytrace");
+        assert_eq!(result["preflight"]["request"]["raytrace"].get("progressive"), options.get("progressive"));
+        let png = image::load_from_memory(&std::fs::read(overridden).unwrap()).unwrap();
+        assert_eq!((png.width(), png.height()), (12, 8));
+        assert_eq!(std::fs::read(saved).unwrap(), original, "CLI overrides must not rewrite saved intent");
+    }
+}
+
+#[test]
+fn render_preserves_typed_raster_and_legacy_runtime_controls() {
+    for job in [Value::Null, json!({"method":"raster","transparent_background":true})] {
+        let dir = Scratch::new();
+        let script = render_setup_script(&dir, job.clone());
+        let out = dir.0.join("raster.png");
+        let mut command = cli();
+        command
+            .arg("render")
+            .arg(&script)
+            .args(["--setup", "Portable setup", "--out"])
+            .arg(&out)
+            .env("SOLIDCRAFT_GPU", "must-not-be-read-for-raster");
+        if job.is_null() {
+            command.arg("--transparent");
+        }
+        let result = json_output(command.output().unwrap());
+        assert_eq!(result["preflight"]["resolved"]["executor"], "cpu-product");
+        assert_eq!(result["export"]["frame"]["executor"], "cpu-product");
+        assert_eq!(result["preflight"]["request"]["transparent_background"], true);
+        assert!(std::fs::read(out).unwrap().starts_with(b"\x89PNG\r\n\x1a\n"));
+    }
+}
+
+#[test]
+fn typed_render_rejects_explicit_runtime_flags_before_gpu_or_option_file_reads() {
+    let dir = Scratch::new();
+    let script = render_setup_script(&dir, json!({"method":"gpu_path","options":{"samples":64,"seed":0}}));
+    let out = dir.0.join("existing.png");
+    std::fs::write(&out, b"previous completed image").unwrap();
+    for flags in [
+        &["--progressive"][..],
+        &["--transparent"][..],
+        &["--samples", "64"][..],
+        &["--max-depth", "8"][..],
+        &["--seed", "0"][..],
+        &["--lighting", "deliberately-missing-lighting.json"][..],
+        &["--tone-map", "reinhard"][..],
+        &["--environment", "deliberately-missing-environment.json"][..],
+    ] {
+        let output = cli()
+            .arg("render")
+            .arg(&script)
+            .args(["--setup", "Portable setup", "--out"])
+            .arg(&out)
+            .arg("--overwrite")
+            .args(flags)
+            .env("SOLIDCRAFT_GPU", "must-not-be-read-for-conflicts")
+            .output()
+            .unwrap();
+        assert_eq!(output.status.code(), Some(1));
+        let error = String::from_utf8_lossy(&output.stderr);
+        assert!(error.contains(&format!("{} cannot accompany a typed saved render setup", flags[0])), "{error}");
+        assert!(output.stdout.is_empty());
+        assert_eq!(std::fs::read(&out).unwrap(), b"previous completed image");
+    }
+}
+
+#[test]
+fn typed_gpu_render_selects_its_host_without_a_progressive_runtime_flag() {
+    // A deliberately invalid policy proves that dispatch reached the GPU host
+    // without depending on an adapter or accepting a CPU fallback. The legacy
+    // --progressive path must still reach that same host-selection boundary.
+    for job in [json!({"method":"gpu_path","options":{"samples":2}}), Value::Null] {
+        let dir = Scratch::new();
+        let script = render_setup_script(&dir, job.clone());
+        let out = dir.0.join("gpu.png");
+        let mut command = cli();
+        command.arg("render").arg(&script).args(["--setup", "Portable setup", "--out"]).arg(&out).env("SOLIDCRAFT_GPU", "not-a-gpu-policy");
+        if job.is_null() {
+            command.arg("--progressive");
+        }
+        let output = command.output().unwrap();
+        assert_eq!(output.status.code(), Some(1));
+        let error = String::from_utf8_lossy(&output.stderr);
+        assert!(error.contains("SOLIDCRAFT_GPU must be auto, hardware, software or cpu"), "{error}");
+        assert!(!out.exists());
+    }
+}
+
+#[test]
+fn render_setup_overrides_obey_shared_validation_before_host_initialization() {
+    let dir = Scratch::new();
+    let script = render_setup_script(&dir, json!({"method":"cpu_raytrace","options":{"progressive":{"samples_per_pixel":64}}}));
+    let out = dir.0.join("invalid.png");
+    // 1024 * 1024 * 64 exceeds the unchanged default Compact camera-sample
+    // budget. Admission must name that envelope before initializing any host.
+    for (flags, message) in [
+        (&["--width", "1024", "--height", "1024"][..], "CPU Compact exceeds its 16777216 camera-sample admission"),
+        (&["--width", "0"][..], "render output must be at least"),
+        (&["--exposure", "NaN"][..], "render exposure must be finite"),
+    ] {
+        let output = cli()
+            .arg("render")
+            .arg(&script)
+            .args(["--setup", "Portable setup", "--out"])
+            .arg(&out)
+            .args(flags)
+            .env("SOLIDCRAFT_GPU", "must-not-be-read-for-invalid-settings")
+            .output()
+            .unwrap();
+        assert_eq!(output.status.code(), Some(1));
+        let error = String::from_utf8_lossy(&output.stderr);
+        assert!(error.contains(message), "{error}");
+        assert!(!out.exists());
+    }
+}
@@ -1,5 +1,5 @@
 //! Straight edges stay one edge after many cuts (#1049). The owner's design
-//! (`tests/action_matrix/designs/crazy-geom-cuts.solidcraft`, saved by 0.10.0): five extrudes,
+//! (`tests/action_matrix/designs/crazy-geom-cuts.sc`, saved by 0.10.0): five extrudes,
 //! joins and cuts, over four sketches, three of them on faces of the body with the faces'
 //! edges projected. Cuts used to leave the straight edges of the walls they sliced split at
 //! vertices nothing else used, so an edge that is one straight line was drawn (and lit on hover)
@@ -14,7 +14,7 @@ use solidcraft_engine::doc::kernel::{FaceSurface, face_surface};
 use solidcraft_engine::geom::Vec3;

 fn design() -> PathBuf {
-    Path::new(env!("CARGO_MANIFEST_DIR")).join("../../tests/action_matrix/designs/crazy-geom-cuts.solidcraft")
+    Path::new(env!("CARGO_MANIFEST_DIR")).join("../../tests/action_matrix/designs/crazy-geom-cuts.sc")
 }

 fn open(path: &Path) -> Session {
@@ -13,11 +13,17 @@ workspace = true
 name = "solidcraft-web"
 path = "src/main.rs"

+[features]
+default = []
+bundled-render-library = ["solidcraft-engine/bundled-render-library"]
+
 [dependencies]
 solidcraft-engine = { workspace = true }
 solidcraft-ui-egui = { workspace = true }
 egui = { workspace = true }
 log = { workspace = true }
+url = "2"
+percent-encoding = "2"

 [target.'cfg(target_arch = "wasm32")'.dependencies]
 eframe = { workspace = true, features = ["default_fonts", "wgpu", "accesskit"] }
@@ -28,7 +34,8 @@ serde_json = { workspace = true }
 web-sys = { version = "0.3", features = [
    "Window", "Document", "Element", "HtmlElement", "HtmlCanvasElement", "Location", "Navigator", "StorageManager",
    "FileSystemHandle", "FileSystemDirectoryHandle", "FileSystemFileHandle", "FileSystemGetFileOptions", "FileSystemWritableFileStream",
-    "WritableStream", "File", "FileList", "Blob", "BlobPropertyBag", "Url", "HtmlAnchorElement", "HtmlInputElement", "Storage",
+    "WritableStream", "File", "FileList", "Blob", "BlobPropertyBag", "Url", "HtmlAnchorElement", "HtmlInputElement", "Storage", "StorageEvent",
    "IdbFactory", "IdbDatabase", "IdbObjectStore", "IdbOpenDbRequest", "IdbRequest", "IdbTransaction", "IdbTransactionMode",
-    "BeforeUnloadEvent", "Event", "EventTarget", "Response", "MediaQueryList", "Gamepad", "Performance",
+    "Headers", "ReadableStream", "ReadableStreamDefaultReader",
+    "BeforeUnloadEvent", "Event", "EventTarget", "KeyboardEvent", "Response", "FormData", "RequestInit", "MediaQueryList", "Gamepad", "Performance",
 ] }
@@ -27,12 +27,12 @@
  <!-- Installable as an app (manifest.webmanifest); the icons are the Linux exports of the app mark. -->
  <meta name="theme-color" content="#343840">
  <link rel="manifest" href="manifest.webmanifest">
-  <link rel="icon" type="image/png" sizes="32x32" href="icons/32x32/ai.storyteller.solidcraft.png">
-  <link rel="apple-touch-icon" href="icons/256x256/ai.storyteller.solidcraft.png">
+  <link rel="icon" type="image/png" sizes="32x32" href="icons/32x32/io.tangencylabs.solidcraft.png">
+  <link rel="apple-touch-icon" href="icons/256x256/io.tangencylabs.solidcraft.png">
  <link data-trunk rel="copy-file" href="manifest.webmanifest" />
-  <link data-trunk rel="copy-file" href="../../assets/icons/app/linux/exports/hicolor/32x32/apps/ai.storyteller.solidcraft.png" data-target-path="icons/32x32" />
-  <link data-trunk rel="copy-file" href="../../assets/icons/app/linux/exports/hicolor/256x256/apps/ai.storyteller.solidcraft.png" data-target-path="icons/256x256" />
-  <link data-trunk rel="copy-file" href="../../assets/icons/app/linux/exports/hicolor/512x512/apps/ai.storyteller.solidcraft.png" data-target-path="icons/512x512" />
+  <link data-trunk rel="copy-file" href="../../assets/icons/app/linux/exports/hicolor/32x32/apps/io.tangencylabs.solidcraft.png" data-target-path="icons/32x32" />
+  <link data-trunk rel="copy-file" href="../../assets/icons/app/linux/exports/hicolor/256x256/apps/io.tangencylabs.solidcraft.png" data-target-path="icons/256x256" />
+  <link data-trunk rel="copy-file" href="../../assets/icons/app/linux/exports/hicolor/512x512/apps/io.tangencylabs.solidcraft.png" data-target-path="icons/512x512" />
 </head>
 <body>
  <canvas id="solidcraft_canvas"></canvas>
@@ -9,8 +9,8 @@
  "theme_color": "#343840",
  "categories": ["productivity", "utilities"],
  "icons": [
-    { "src": "icons/32x32/ai.storyteller.solidcraft.png", "sizes": "32x32", "type": "image/png" },
-    { "src": "icons/256x256/ai.storyteller.solidcraft.png", "sizes": "256x256", "type": "image/png" },
-    { "src": "icons/512x512/ai.storyteller.solidcraft.png", "sizes": "512x512", "type": "image/png" }
+    { "src": "icons/32x32/io.tangencylabs.solidcraft.png", "sizes": "32x32", "type": "image/png" },
+    { "src": "icons/256x256/io.tangencylabs.solidcraft.png", "sizes": "256x256", "type": "image/png" },
+    { "src": "icons/512x512/io.tangencylabs.solidcraft.png", "sizes": "512x512", "type": "image/png" }
  ]
 }
@@ -114,10 +114,70 @@ pub fn opens_design(extensions: &[&str]) -> bool {
    extensions.is_empty() || extensions.iter().any(|e| solidcraft_engine::io::DESIGN_EXTS.contains(e))
 }

-/// The file type a Save As dialog offers for `name`: (description, MIME type, extension).
-pub fn save_type(name: &str) -> (&'static str, &'static str, &'static str) {
-    let json = std::path::Path::new(name).extension().is_some_and(|e| e.eq_ignore_ascii_case("json"));
-    if json { ("Plain JSON design", "application/json", ".json") } else { ("SolidCraft design", "application/octet-stream", ".solidcraft") }
+/// Where an Open for `extensions` (what the command reads; `&[]`: anything) is answered.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum OpenRoute {
+    /// The browser's open dialog for a design: the file keeps its handle, so Save writes back.
+    Disk,
+    /// The "Files in this browser" window, where the browser can't open a design from the disk.
+    Panel,
+    /// A plain file input that offers these types: the file is read into the engine's files and
+    /// the command runs on it (Insert DXF or SVG, images, meshes, imported settings).
+    Upload,
+}
+
+/// Choose how an Open for `extensions` asks for its file; `api`: the browser can open a file
+/// from the disk and keep its handle.
+pub fn open_route(api: bool, extensions: &[&str]) -> OpenRoute {
+    match (opens_design(extensions), api) {
+        (true, true) => OpenRoute::Disk,
+        (true, false) => OpenRoute::Panel,
+        (false, _) => OpenRoute::Upload,
+    }
+}
+
+/// The `accept` list of a file input for `extensions` (with or without their dot): ".dxf,.svg".
+pub fn accept_list(extensions: &[&str]) -> String {
+    let list: Vec<String> = extensions
+        .iter()
+        .map(|e| e.trim().trim_start_matches('.'))
+        .filter(|e| !e.is_empty())
+        .map(|e| format!(".{}", e.to_ascii_lowercase()))
+        .collect();
+    list.join(",")
+}
+
+/// The `accept` of a file input for `extensions` on this device (`apple_touch`: an iPhone or
+/// iPad). The picker there offers only files of a type the system knows from the list and greys
+/// out the rest, `.solidcraft` designs among them, since no system type has that extension
+/// (#6977). So it offers every file there, and the opener checks what it gets.
+pub fn input_accept(extensions: &[&str], apple_touch: bool) -> String {
+    if apple_touch { String::new() } else { accept_list(extensions) }
+}
+
+/// The browser runs on an iPhone or iPad (every browser there is WebKit), from its
+/// `navigator.userAgent` and `navigator.maxTouchPoints`. iPadOS presents itself as a Mac; only its
+/// touch screen tells them apart.
+pub fn apple_touch(user_agent: &str, touch_points: i32) -> bool {
+    ["iPhone", "iPad", "iPod"].iter().any(|d| user_agent.contains(d)) || (user_agent.contains("Macintosh") && touch_points > 1)
+}
+
+/// The largest file an upload for `extensions` reads: images go into a canvas, which has a size
+/// limit, so a bigger one is refused before it is read. `None`: the importer checks the file.
+pub fn upload_limit(extensions: &[&str]) -> Option<usize> {
+    let image = |e: &&str| ["png", "jpg", "jpeg"].contains(&e.trim_start_matches('.').to_ascii_lowercase().as_str());
+    (!extensions.is_empty() && extensions.iter().all(image)).then_some(solidcraft_engine::doc::canvas::MAX_CANVAS_BYTES)
+}
+
+/// The file type a Save As dialog offers for `name`: (description, MIME type, extension). A
+/// design is `.sc` unless the name already has an older design extension, which it keeps.
+pub fn save_type(name: &str) -> (&'static str, &'static str, String) {
+    let ext = std::path::Path::new(name).extension().and_then(|e| e.to_str()).map(str::to_ascii_lowercase);
+    match ext.as_deref() {
+        Some("json") => ("Plain JSON design", "application/json", ".json".into()),
+        Some(e) if solidcraft_engine::io::is_design_ext(e) => ("SolidCraft design", "application/octet-stream", format!(".{e}")),
+        _ => ("SolidCraft design", "application/octet-stream", format!(".{}", solidcraft_engine::io::DESIGN_EXT)),
+    }
 }

 /// Is this a cancelled dialog (the browser's `AbortError`)? Not an error to show.
@@ -140,7 +200,7 @@ mod web {
    use wasm_bindgen_futures::{JsFuture, spawn_local};
    use web_sys::{FileSystemFileHandle, IdbDatabase, IdbObjectStore, IdbOpenDbRequest, IdbRequest, IdbTransactionMode};

-    use super::{HANDLE_MAX_AGE_MS, is_abort, make_id, opens_design, parse, path, plan_prune, save_type};
+    use super::{HANDLE_MAX_AGE_MS, is_abort, make_id, parse, path, plan_prune, save_type};
    use crate::files::{Files, err, read_handle};

    const DB: &str = "solidcraft-disk-handles";
@@ -209,7 +269,7 @@ mod web {
        let options = Object::new();
        let _ = Reflect::set(&options, &"suggestedName".into(), &name.into());
        let (description, mime, extension) = save_type(name);
-        let _ = Reflect::set(&options, &"types".into(), &types(description, mime, extension));
+        let _ = Reflect::set(&options, &"types".into(), &types(description, mime, &extension));
        options
    }

@@ -294,7 +354,9 @@ mod web {
        let options = Object::new();
        let _ = Reflect::set(&options, &"multiple".into(), &JsValue::FALSE);
        let extensions = Array::new();
-        for e in [".solidcraft", ".solvecraft", ".json", ".step", ".stp", ".3mf", ".stl", ".obj", ".glb", ".gltf"] {
+        let designs = solidcraft_engine::io::DESIGN_EXTS.iter().map(|e| format!(".{e}"));
+        let others = [".json", ".step", ".stp", ".3mf", ".stl", ".obj", ".glb", ".gltf", ".fcstd", ".3dm", ".dxf", ".svg"].map(String::from);
+        for e in designs.chain(others) {
            extensions.push(&e.into());
        }
        let accept = Object::new();
@@ -315,11 +377,6 @@ mod web {
        p
    }

-    /// Does an Open for `extensions` use the browser's open dialog?
-    pub fn handles_open(extensions: &[&str]) -> bool {
-        supported() && opens_design(extensions)
-    }
-
    // ---- writing ------------------------------------------------------------------------

    /// Queue what a command wrote to a disk path. Writes go one at a time; a newer write of the
@@ -577,6 +634,8 @@ mod tests {
        assert_eq!(route("/disk/18f-2a/Bracket.solidcraft"), WriteTo::Disk);
        assert_eq!(route("/downloads/part.step"), WriteTo::Download);
        assert_eq!(route("/upload/part.step"), WriteTo::Memory);
+        // The temporary folder (a screenshot without a path, #7192) stays in memory.
+        assert_eq!(route(&format!("{}/solidcraft-shot.png", solidcraft_engine::io::vfs::BROWSER_TEMP)), WriteTo::Memory);
    }

    #[test]
@@ -615,17 +674,55 @@ mod tests {
    #[test]
    fn only_design_opens_use_the_disk_dialog() {
        assert!(opens_design(&[]));
+        assert!(opens_design(&["sc"]));
        assert!(opens_design(&["solidcraft"]));
        assert!(opens_design(&["solvecraft"]));
        assert!(!opens_design(&["step", "stp"]));
        assert!(!opens_design(&["json"]));
    }

+    /// Insert DXF or SVG, images and other non-design files get a file input that offers their
+    /// types in every browser (#2052); designs keep the disk dialog or the browser's files.
+    #[test]
+    fn opens_of_other_files_use_a_file_input_for_their_types() {
+        assert_eq!(open_route(true, &["dxf"]), OpenRoute::Upload);
+        assert_eq!(open_route(false, &["png", "jpg", "jpeg"]), OpenRoute::Upload);
+        assert_eq!(open_route(true, &[]), OpenRoute::Disk);
+        assert_eq!(open_route(false, &["solidcraft"]), OpenRoute::Panel);
+        assert_eq!(accept_list(&["dxf"]), ".dxf");
+        assert_eq!(accept_list(&["png", ".JPG", "", "jpeg"]), ".png,.jpg,.jpeg");
+        assert_eq!(accept_list(&[]), "");
+        assert!(upload_limit(&["png", "jpg", "jpeg"]).is_some());
+        assert_eq!(upload_limit(&["dxf"]), None);
+    }
+
+    /// An iPhone or iPad greys out a `.solidcraft` design the `accept` list names, as it knows no
+    /// type for that extension, so its inputs offer every file; other devices keep the list (#6977).
+    #[test]
+    fn file_inputs_on_an_iphone_or_ipad_offer_every_file() {
+        let iphone =
+            "Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Mobile/15E148 Safari/604.1";
+        let mac = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.5 Safari/605.1.15";
+        let chrome_ios = "Mozilla/5.0 (iPhone; CPU iPhone OS 18_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/138.0.7204.156 Mobile/15E148 Safari/604.1";
+        let chrome = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36";
+        assert!(apple_touch(iphone, 5));
+        assert!(apple_touch(chrome_ios, 5), "every browser on iOS has the same picker");
+        assert!(apple_touch(mac, 5), "an iPad presents itself as a Mac");
+        assert!(!apple_touch(mac, 0), "a Mac has no touch screen");
+        assert!(!apple_touch(chrome, 10), "a touch screen elsewhere filters as before");
+        assert!(!apple_touch("", 0), "hostile input is just not an iPhone");
+        let designs = ["solidcraft", "json", "step"];
+        assert_eq!(input_accept(&designs, true), "");
+        assert_eq!(input_accept(&designs, false), ".solidcraft,.json,.step");
+    }
+
    #[test]
    fn the_save_dialog_offers_the_type_of_the_name() {
-        assert_eq!(save_type("Plate.solidcraft").2, ".solidcraft");
+        assert_eq!(save_type("Plate.sc").2, ".sc");
        assert_eq!(save_type("Plate.JSON").2, ".json");
-        assert_eq!(save_type("Plate").2, ".solidcraft");
+        assert_eq!(save_type("Plate").2, ".sc");
+        // A design opened under an older extension keeps it.
+        assert_eq!(save_type("Plate.solidcraft").2, ".solidcraft");
    }

    #[test]
@@ -0,0 +1,40 @@
+//! Open with EasyPrint in the browser: upload the model to Printables' import endpoint with
+//! `fetch` (it allows any origin) and answer with the address to open.
+
+use std::sync::mpsc::Sender;
+
+use js_sys::{Array, Uint8Array};
+use solidcraft_engine::easyprint::{IMPORT_URL, parse_import_response};
+use wasm_bindgen::JsCast as _;
+use wasm_bindgen_futures::{JsFuture, spawn_local};
+
+use crate::files::err;
+
+/// Start the upload; the answer arrives on `done`.
+pub fn upload(name: &str, bytes: Vec<u8>, done: Sender<Result<String, String>>) {
+    let name = name.to_string();
+    spawn_local(async move {
+        let _ = done.send(post(&name, &bytes).await);
+    });
+}
+
+async fn post(name: &str, bytes: &[u8]) -> Result<String, String> {
+    let window = web_sys::window().ok_or("no window")?;
+    let parts = Array::new();
+    parts.push(&Uint8Array::from(bytes));
+    let blob = web_sys::Blob::new_with_u8_array_sequence(&parts).map_err(err)?;
+    let form = web_sys::FormData::new().map_err(err)?;
+    form.append_with_blob_and_filename("file", &blob, name).map_err(err)?;
+    form.append_with_str("file_name", name).map_err(err)?;
+    let headers = web_sys::Headers::new().map_err(err)?;
+    headers.set("Accept", "application/json").map_err(err)?;
+    let init = web_sys::RequestInit::new();
+    init.set_method("POST");
+    init.set_body(&form);
+    init.set_headers(&headers);
+    let response = JsFuture::from(window.fetch_with_str_and_init(IMPORT_URL, &init)).await.map_err(err)?;
+    let response: web_sys::Response = response.dyn_into().map_err(|_| "response cast failed".to_string())?;
+    let status = response.status();
+    let text = JsFuture::from(response.text().map_err(err)?).await.map_err(err)?;
+    parse_import_response(status, text.as_string().unwrap_or_default().as_bytes())
+}
@@ -24,11 +24,13 @@ pub const OPFS: &str = disk::OPFS_PREFIX;
 pub const DOWNLOADS: &str = disk::DOWNLOADS_PREFIX;
 /// Files brought in from the computer.
 pub const UPLOAD: &str = "/upload/";
-/// The autosave of unsaved work (in OPFS: `recovery.solidcraft` and `recovery.json`).
-const RECOVERY: &str = "recovery.solidcraft";
-/// The autosave earlier releases kept (compatibility shim, docs/compatibility.md): recovered
-/// when there is no current one.
-const LEGACY_RECOVERY: &str = "recovery.solvecraft";
+/// The autosave of unsaved work (in OPFS: `recovery.sc` and `recovery.json`), named with
+/// `solidcraft_engine::io::DESIGN_EXT`.
+const RECOVERY: &str = "recovery.sc";
+/// The autosaves earlier releases kept, newest first, one per entry of
+/// `solidcraft_engine::io::LEGACY_DESIGN_EXTS` (compatibility shim, docs/compatibility.md): the
+/// newest is recovered when there is no current one.
+const LEGACY_RECOVERY: [&str; 2] = ["recovery.solidcraft", "recovery.solvecraft"];
 const RECOVERY_META: &str = "recovery.json";

 /// What to do with a file brought in from the computer.
@@ -38,6 +40,8 @@ pub enum Intent {
    Open,
    /// Add its bodies to the open design (STEP, 3MF, STL).
    Insert,
+    /// Import it as a theme: it was dropped on Preferences' Import tile (#8226).
+    Theme,
 }

 /// A stored design, as the file panel lists it.
@@ -282,9 +286,10 @@ pub fn start(files: &Rc<Files>) {
                }
                let mut entries = Vec::new();
                let has_recovery = all.iter().any(|(n, _, _)| n == RECOVERY);
+                let legacy = (!has_recovery).then(|| LEGACY_RECOVERY.into_iter().find(|l| all.iter().any(|(n, _, _)| n == l))).flatten();
                for (name, bytes, modified) in all {
-                    if name == LEGACY_RECOVERY {
-                        if !has_recovery {
+                    if LEGACY_RECOVERY.contains(&name.as_str()) {
+                        if legacy == Some(name.as_str()) {
                            vfs::insert(&format!("{OPFS}{RECOVERY}"), bytes);
                        }
                        continue;
@@ -424,7 +429,9 @@ pub fn autosave(files: &Rc<Files>, doc: Option<(&solidcraft_engine::doc::Documen
        }
        None => spawn_local(async move {
            let _ = remove_file(RECOVERY).await;
-            let _ = remove_file(LEGACY_RECOVERY).await;
+            for legacy in LEGACY_RECOVERY {
+                let _ = remove_file(legacy).await;
+            }
            let _ = remove_file(RECOVERY_META).await;
        }),
    }
@@ -448,6 +455,18 @@ pub fn recovery_path() -> String {
    format!("{OPFS}{RECOVERY}")
 }

+/// A recovery file lives in OPFS, but its relative links belong to the original design's
+/// folder (which can be on disk). Resolve them before Open sees the temporary file location.
+pub fn prepare_recovery(original_path: Option<&str>) -> Result<String, String> {
+    let path = recovery_path();
+    let bytes = vfs::read(&path, solidcraft_engine::io::MAX_DESIGN_BYTES).map_err(|e| e.to_string())?;
+    let mut doc = solidcraft_engine::io::read_design(&bytes).map_err(|e| e.to_string())?;
+    solidcraft_engine::resolve_design_links(&mut doc, original_path);
+    let bytes = solidcraft_engine::io::write_design_container(&doc).map_err(|e| e.to_string())?;
+    vfs::insert(&path, bytes);
+    Ok(path)
+}
+
 /// Pick files on the computer: the File System Access picker where there is one, else an
 /// `<input type=file>`. Read files arrive in `files.incoming`.
 pub fn pick_from_disk(files: &Rc<Files>, intent: Intent) {
@@ -499,7 +518,11 @@ fn input_picker(files: &Rc<Files>, intent: Intent) {
    let Some(doc) = web_sys::window().and_then(|w| w.document()) else { return };
    let Ok(input) = doc.create_element("input").map(|e| e.unchecked_into::<web_sys::HtmlInputElement>()) else { return };
    input.set_type("file");
-    input.set_accept(".solidcraft,.solvecraft,.json,.step,.stp,.3mf,.stl,.obj,.glb,.gltf");
+    // Everything the browser build imports, from the format registry: cadmpeg is pure Rust, so
+    // FreeCAD and Rhino files are part of it; plus the DXF and SVG drawings Open and Insert take.
+    let mut extensions = solidcraft_engine::io::formats::open_extensions(true);
+    extensions.extend(["dxf", "svg"]);
+    input.set_accept(&disk::input_accept(&extensions, apple_touch()));
    // Attached (hidden) while it is open: some browsers ignore a click on a detached input.
    let _ = input.set_attribute("style", "display:none");
    if let Some(body) = doc.body() {
@@ -524,14 +547,85 @@ fn input_picker(files: &Rc<Files>, intent: Intent) {
    input.click();
 }

+/// Ask for one file of these types (`extensions`, e.g. `["dxf"]`) with a plain file input, the
+/// dialog every browser has. The answer is the file's path in the engine's files (under
+/// [`UPLOAD`], as for a file picked in the disk dialog), so the command that asked runs on it;
+/// `None` when the dialog was closed or the file could not be read.
+pub fn pick_upload(files: &Rc<Files>, extensions: &[&str]) -> impl std::future::Future<Output = Option<String>> + use<> {
+    // Shown now, in the click: a file dialog needs the user's gesture.
+    let chosen = choose_file(&disk::input_accept(extensions, apple_touch()));
+    let limit = disk::upload_limit(extensions);
+    let files = files.clone();
+    async move {
+        let read = async {
+            let value = JsFuture::from(chosen?).await.map_err(err)?;
+            // Closing the dialog answers no file: nothing to say.
+            let Ok(file) = value.dyn_into::<web_sys::File>() else { return Ok(None) };
+            let name = file.name();
+            if limit.is_some_and(|max| !file.size().is_finite() || file.size() > max as f64) {
+                return Err(format!("{name}: the file is too large"));
+            }
+            let bytes = blob_bytes(&file).await.map_err(|e| format!("{name}: {e}"))?;
+            let path = format!("{UPLOAD}{name}");
+            vfs::insert(&path, bytes);
+            Ok(Some(path))
+        };
+        match read.await {
+            Ok(path) => path,
+            Err(e) => {
+                files.say(format!("open: {e}"), true);
+                None
+            }
+        }
+    }
+}
+
+/// The page runs on an iPhone or iPad, whose file inputs offer every file (`disk::input_accept`).
+fn apple_touch() -> bool {
+    web_sys::window().is_some_and(|w| {
+        let nav = w.navigator();
+        disk::apple_touch(&nav.user_agent().unwrap_or_default(), nav.max_touch_points())
+    })
+}
+
+/// Show a hidden `<input type=file>` offering `accept` (call in the click). The promise answers
+/// the picked `File`, or `null` when the dialog is closed (the input's `cancel` event).
+fn choose_file(accept: &str) -> Result<js_sys::Promise, String> {
+    let doc = web_sys::window().and_then(|w| w.document()).ok_or("this page can't show a file dialog")?;
+    let input = doc.create_element("input").map_err(err)?.dyn_into::<web_sys::HtmlInputElement>().map_err(|_| "no file input".to_string())?;
+    input.set_type("file");
+    input.set_accept(accept);
+    // Attached (hidden) while it is open: some browsers ignore a click on a detached input.
+    input.set_attribute("style", "display:none").map_err(err)?;
+    doc.body().ok_or("this page has no body")?.append_child(&input).map_err(err)?;
+    let promise = js_sys::Promise::new(&mut |resolve: Function, _reject: Function| {
+        // One answer for a pick or a cancel; read from the event, so it does not keep the input.
+        let done = Closure::once_into_js(move |event: web_sys::Event| {
+            let file = event.target().and_then(|t| t.dyn_into::<web_sys::HtmlInputElement>().ok()).and_then(|input| {
+                input.set_onchange(None);
+                input.set_oncancel(None);
+                input.remove();
+                input.files().and_then(|list| list.get(0))
+            });
+            let _ = resolve.call1(&JsValue::UNDEFINED, &file.map_or(JsValue::NULL, JsValue::from));
+        });
+        input.set_onchange(Some(done.unchecked_ref()));
+        input.set_oncancel(Some(done.unchecked_ref()));
+    });
+    input.click();
+    Ok(promise)
+}
+
 /// Read files dropped on the page.
-pub fn take_drops(files: &Rc<Files>, raw: &mut egui::RawInput) {
+/// `theme`: the pointer is over Preferences' Import tile, so the files are themes.
+pub fn take_drops(files: &Rc<Files>, raw: &mut egui::RawInput, theme: bool) {
+    let intent = if theme { Intent::Theme } else { Intent::Insert };
    for f in std::mem::take(&mut raw.dropped_files) {
        let files = files.clone();
        spawn_local(async move {
            let name = f.path().file_name().map(|n| n.to_string_lossy().to_string()).unwrap_or_else(|| "dropped".into());
            match f.bytes_async().await {
-                Ok(b) => files.arrive(name, b, Intent::Insert),
+                Ok(b) => files.arrive(name, b, intent),
                Err(e) => files.say(format!("{name}: {e}"), true),
            }
        });
@@ -0,0 +1,142 @@
+//! Bounded HTTPS or same-origin downloads, handed to the normal design-open command as unsaved copies.
+use std::{cell::RefCell, rc::Rc};
+
+use js_sys::{Reflect, Uint8Array};
+use solidcraft_engine::io::vfs;
+use solidcraft_ui_egui::{SolveApp, ui_kit};
+use wasm_bindgen::{JsCast as _, JsValue};
+use wasm_bindgen_futures::{JsFuture, spawn_local};
+
+use crate::{check_download_size, design_url};
+
+type Reply = Result<(String, Vec<u8>), String>;
+
+#[derive(Default)]
+pub struct Download {
+    reply: Rc<RefCell<Option<Reply>>>,
+    pending: Option<(String, Vec<u8>)>,
+}
+
+impl Download {
+    pub fn start(url: Option<&str>, ctx: &egui::Context) -> Self {
+        let download = Self::default();
+        if let Some(url) = url {
+            let url = url.to_owned();
+            let slot = download.reply.clone();
+            let ctx = ctx.clone();
+            spawn_local(async move {
+                *slot.borrow_mut() = Some(fetch(&url).await);
+                ctx.request_repaint();
+            });
+        }
+        download
+    }
+
+    pub fn tick(&mut self, app: &mut SolveApp, ctx: &egui::Context) {
+        if let Some(reply) = self.reply.borrow_mut().take() {
+            match reply {
+                Ok(file) => self.pending = Some(file),
+                Err(error) => app.set_status(format!("Could not open design link: {error}"), true),
+            }
+        }
+        if self.pending.is_none() || app.file_picker_busy() {
+            return;
+        }
+        if solidcraft_ui_egui::documents::any_dirty(app) {
+            let mut answer = None;
+            let closed = ui_kit::Window::new(egui::Id::new("open_link"), "status_warning", solidcraft_ui_egui::i18n::tr("web.open_link"))
+                .required()
+                .show_body(ctx, |ui| {
+                    ui.label(solidcraft_ui_egui::i18n::tr("web.open_link_confirm"));
+                    ui.horizontal(|ui| {
+                        if ui_kit::button(ui, solidcraft_ui_egui::i18n::tr("ui.open"), ui_kit::Button::Normal).clicked() {
+                            answer = Some(true);
+                        }
+                        if ui_kit::button(ui, solidcraft_ui_egui::i18n::tr("ui.cancel"), ui_kit::Button::Normal).clicked() {
+                            answer = Some(false);
+                        }
+                    });
+                });
+            match answer {
+                Some(true) => {}
+                Some(false) => {
+                    self.pending = None;
+                    return;
+                }
+                None if closed => {
+                    self.pending = None;
+                    return;
+                }
+                None => return,
+            }
+        }
+        let Some((name, bytes)) = self.pending.take() else { return };
+        // The extension selects the design loader even when the URL has no extension.
+        let path = &format!("/linked/design.{}", solidcraft_engine::io::DESIGN_EXT);
+        vfs::insert(path, bytes);
+        app.open_path(path);
+        if app.session.path.as_deref() == Some(path.as_str()) {
+            app.session.path = None;
+            app.session.doc_mut().name = name;
+            app.session.mark_unsaved();
+        } else {
+            app.set_status("Could not open design link: the downloaded file is not a valid SolidCraft design", true);
+        }
+        let _ = vfs::remove(path);
+    }
+}
+
+async fn fetch(value: &str) -> Reply {
+    let window = web_sys::window().ok_or("No browser window")?;
+    let page_origin = window.location().origin().map_err(|_| "Cannot read page origin")?;
+    let url = design_url(value, &page_origin)?;
+    let name = url.path_segments().and_then(|mut segments| segments.next_back()).filter(|name| !name.is_empty()).unwrap_or("Design");
+    let decoded = js_sys::decode_uri_component(name).ok().and_then(|name| name.as_string()).unwrap_or_else(|| name.to_owned());
+    // `arm.sc` (or a legacy `arm.solidcraft`) is named `arm`.
+    let stem = match decoded.rsplit_once('.') {
+        Some((stem, ext)) if !stem.is_empty() && solidcraft_engine::io::is_design_ext(ext) => stem,
+        _ => decoded.as_str(),
+    };
+    let name: String = stem.chars().take(255).collect();
+    let response = JsFuture::from(window.fetch_with_str(url.as_str())).await.map_err(|_| "Network request failed or the host refused CORS access")?;
+    let response: web_sys::Response = response.dyn_into().map_err(|_| "Invalid download response")?;
+    design_url(&response.url(), &page_origin).map_err(|_| "Design redirected to a URL that does not use HTTPS or the page's own origin")?;
+    if !response.ok() {
+        return Err(format!("HTTP {} {}", response.status(), response.status_text()));
+    }
+    let length = response
+        .headers()
+        .get("Content-Length")
+        .map_err(|_| "Cannot read download size")?
+        .map(|value| value.parse::<u64>().map_err(|_| "Invalid Content-Length"))
+        .transpose()?;
+    if let Some(length) = length {
+        check_download_size(0, length)?;
+    }
+    let stream = response.body().ok_or("Download has no body")?;
+    let reader: web_sys::ReadableStreamDefaultReader = stream.get_reader().dyn_into().map_err(|_| "Cannot read download stream")?;
+    let result = read(&reader).await;
+    if result.is_err() {
+        let _ = JsFuture::from(reader.cancel()).await;
+    }
+    // Fetch rejects interrupted HTTP bodies and decodes Content-Encoding. Content-Length
+    // can describe compressed bytes, so the streamed limit also checks the decoded size.
+    let bytes = result?;
+    Ok((name, bytes))
+}
+
+async fn read(reader: &web_sys::ReadableStreamDefaultReader) -> Result<Vec<u8>, String> {
+    let mut bytes = Vec::new();
+    // Bound even a stream which keeps returning empty chunks.
+    for _ in 0..1_000_000 {
+        let chunk = JsFuture::from(reader.read()).await.map_err(|_| "Download interrupted")?;
+        if Reflect::get(&chunk, &JsValue::from_str("done")).map_err(|_| "Invalid download stream")?.as_bool() == Some(true) {
+            return Ok(bytes);
+        }
+        let value = Reflect::get(&chunk, &JsValue::from_str("value")).map_err(|_| "Invalid download chunk")?;
+        let chunk: Uint8Array = value.dyn_into().map_err(|_| "Invalid download bytes")?;
+        check_download_size(bytes.len(), u64::from(chunk.length()))?;
+        bytes.extend_from_slice(&chunk.to_vec());
+    }
+    Err("Download returned too many chunks".into())
+}
@@ -11,19 +11,158 @@ mod api;
 #[cfg(any(target_arch = "wasm32", test))]
 mod disk;
 #[cfg(target_arch = "wasm32")]
+mod easyprint;
+#[cfg(target_arch = "wasm32")]
 mod files;
 #[cfg(target_arch = "wasm32")]
 mod install;
+#[cfg(target_arch = "wasm32")]
+mod linked;
 #[cfg(any(target_arch = "wasm32", test))]
 mod space_mouse;

+/// The browser switches tabs with Ctrl+Tab and Ctrl+Shift+Tab, so the page leaves those keys to
+/// it (#5227); plain Tab and Shift+Tab still move between the app's fields. (Ctrl+PageUp and
+/// Ctrl+PageDown already reach the browser.)
+#[cfg(any(target_arch = "wasm32", test))]
+fn browser_switches_tabs(key: &str, ctrl: bool) -> bool {
+    ctrl && key == "Tab"
+}
+
+#[cfg(any(target_arch = "wasm32", test))]
+fn query_flag(query: &str, name: &str) -> bool {
+    url::form_urlencoded::parse(query.trim_start_matches('?').as_bytes()).any(|(key, _)| key == name)
+}
+
+/// Launch options use exact query keys; URL values are decoded only once.
+#[cfg(any(target_arch = "wasm32", test))]
+#[derive(Default, Debug)]
+struct Launch {
+    open: Option<String>,
+    embed: bool,
+}
+
+#[cfg(any(target_arch = "wasm32", test))]
+impl Launch {
+    fn parse(query: &str) -> Self {
+        let mut launch = Self::default();
+        let mut embed = false;
+        for (key, value) in url::form_urlencoded::parse(query.trim_start_matches('?').as_bytes()) {
+            match key.as_ref() {
+                "open" if launch.open.is_none() => launch.open = Some(value.into_owned()),
+                "embed" => embed = true,
+                _ => {}
+            }
+        }
+        launch.embed = embed && launch.open.is_some();
+        launch
+    }
+
+    fn persists(&self) -> bool {
+        !self.embed
+    }
+
+    fn full_app_url(&self, mut url: url::Url) -> String {
+        url.set_query(None);
+        url.set_fragment(None);
+        if let Some(open) = &self.open {
+            url.query_pairs_mut().append_pair("open", open);
+        }
+        url.to_string()
+    }
+}
+
+#[cfg(any(target_arch = "wasm32", test))]
+fn design_url(value: &str, page_origin: &str) -> Result<url::Url, String> {
+    if value.len() > 16_384 {
+        return Err("Design URL is too long".into());
+    }
+    let decoded = percent_encoding::percent_decode_str(value).decode_utf8().map_err(|_| "Invalid design URL encoding")?;
+    if decoded.chars().any(|ch| ch.is_control() || ch == '\\') {
+        return Err("Design links must not contain backslashes or control characters".into());
+    }
+    // Check before URL parsing normalizes away dot segments. Decode escaped slashes too.
+    let path = value.split(['?', '#']).next().unwrap_or_default();
+    let path = percent_encoding::percent_decode_str(path).collect::<Vec<_>>();
+    if path.split(|byte| *byte == b'/').any(|segment| segment == b"..") {
+        return Err("Design links must not contain parent path segments".into());
+    }
+    let page = url::Url::parse(page_origin).map_err(|_| "Invalid page origin")?;
+    let url = if value.starts_with('/') && !value.starts_with("//") {
+        page.join(value).map_err(|_| "Invalid design path")?
+    } else {
+        url::Url::parse(value).map_err(|_| "Invalid design URL")?
+    };
+    if (url.scheme() != "https" && url.origin() != page.origin())
+        || url.host_str().is_none()
+        || !url.username().is_empty()
+        || url.password().is_some()
+    {
+        return Err("Design links must use HTTPS or the page's own origin without credentials".into());
+    }
+    Ok(url)
+}
+
+#[cfg(any(target_arch = "wasm32", test))]
+fn check_download_size(current: usize, incoming: u64) -> Result<(), String> {
+    let cap = solidcraft_engine::io::MAX_DESIGN_BYTES as u64;
+    if current as u64 > cap || incoming > cap.saturating_sub(current as u64) {
+        return Err(format!("Design exceeds the {} MB size limit", cap / (1024 * 1024)));
+    }
+    Ok(())
+}
+
+/// Ctrl+W (⌘W, without Shift or Alt) while a design is shown closes it in the app, so the
+/// browser must not close the tab (#5366). On the start page the browser closes the tab.
+#[cfg(any(target_arch = "wasm32", test))]
+fn closes_design(key: &str, command: bool, shift: bool, alt: bool, design_shown: bool) -> bool {
+    design_shown && command && !shift && !alt && key.eq_ignore_ascii_case("w")
+}
+
+/// The settings a tab last wrote to the browser's storage, or loaded from another tab (#8644).
+/// Every open tab of the app shares that storage, and eframe saves each tab's whole copy every
+/// 30 s and when the page loses focus, so a tab still holding old settings put them back over a
+/// change made in another. A change is now written in the frame it is made, and the other tabs
+/// load it ([`settings_written`]).
+#[cfg(any(target_arch = "wasm32", test))]
+#[derive(Default, Debug)]
+struct PrefsWriter {
+    written: Option<String>,
+}
+
+#[cfg(any(target_arch = "wasm32", test))]
+impl PrefsWriter {
+    /// `prefs` if they are not the settings written or loaded last (they count as written from
+    /// now on).
+    fn take(&mut self, prefs: String) -> Option<String> {
+        if self.written.as_deref() == Some(prefs.as_str()) {
+            return None;
+        }
+        self.written = Some(prefs.clone());
+        Some(prefs)
+    }
+
+    /// The settings the tab holds after loading another tab's: the tab doesn't write them back.
+    fn loaded(&mut self, prefs: String) {
+        self.written = Some(prefs);
+    }
+}
+
+/// The settings another tab wrote, from a `storage` event (the browser sends one to every other
+/// tab of the page when one tab writes). Other keys, and settings taken away (clearing the site's
+/// data), leave this tab's settings as they are.
+#[cfg(any(target_arch = "wasm32", test))]
+fn settings_written(key: Option<&str>, value: Option<String>) -> Option<String> {
+    value.filter(|_| key == Some(solidcraft_ui_egui::prefs::STORAGE_KEY))
+}
+
 #[cfg(target_arch = "wasm32")]
 mod web {
    use std::rc::Rc;

    use solidcraft_engine::Session;
    use solidcraft_engine::io::vfs;
-    use solidcraft_ui_egui::{Services, SolveApp};
+    use solidcraft_ui_egui::{Services, SolveApp, ui_kit};
    use wasm_bindgen::JsCast as _;

    use crate::api::Api;
@@ -68,6 +207,23 @@ mod web {
    thread_local! {
        /// An open design has unsaved changes: leaving the page asks first.
        static UNSAVED: std::cell::Cell<bool> = const { std::cell::Cell::new(false) };
+        /// A design is shown (not the start page): Ctrl+W closes it, not the browser tab.
+        static DESIGN_SHOWN: std::cell::Cell<bool> = const { std::cell::Cell::new(false) };
+    }
+
+    /// Ctrl+W (⌘W) closes the design shown, as on the desktop; on the start page it is left to
+    /// the browser, which closes the tab (#5366). Browsers that keep Ctrl+W to themselves still
+    /// close the tab, after asking when a design is unsaved ([`ask_before_unload`]).
+    fn keep_ctrl_w_for_the_design(window: &web_sys::Window) {
+        let on_key = wasm_bindgen::closure::Closure::<dyn FnMut(web_sys::KeyboardEvent)>::new(|e: web_sys::KeyboardEvent| {
+            let command = e.ctrl_key() || e.meta_key();
+            if crate::closes_design(&e.key(), command, e.shift_key(), e.alt_key(), DESIGN_SHOWN.with(std::cell::Cell::get)) {
+                e.prevent_default();
+            }
+        });
+        let _ = window.add_event_listener_with_callback_and_bool("keydown", on_key.as_ref().unchecked_ref(), true);
+        // The listener lives as long as the page.
+        on_key.forget();
    }

    /// The browser's "leave site? changes you made may not be saved" prompt while a design has
@@ -84,12 +240,47 @@ mod web {
        on_unload.forget();
    }

+    /// eframe cancels the browser's action for every Tab it gets, so the browser couldn't switch
+    /// tabs while the app has the keyboard. Its tab-switching keys stop here, on the way down to
+    /// the canvas, before eframe sees them; the browser then acts on them as usual.
+    fn leave_tab_switching_to_browser(window: &web_sys::Window) {
+        let on_key = wasm_bindgen::closure::Closure::<dyn FnMut(web_sys::KeyboardEvent)>::new(|e: web_sys::KeyboardEvent| {
+            if crate::browser_switches_tabs(&e.key(), e.ctrl_key()) {
+                e.stop_propagation();
+            }
+        });
+        let _ = window.add_event_listener_with_callback_and_bool("keydown", on_key.as_ref().unchecked_ref(), true);
+        // The listener lives as long as the page.
+        on_key.forget();
+    }
+
+    /// Settings another tab wrote, waiting for this tab's next frame (#8644).
+    type PrefsInbox = Rc<std::cell::Cell<Option<String>>>;
+
+    /// Settings another tab of the app writes go to `inbox`, and this tab draws a frame, which
+    /// loads them.
+    fn hear_settings_from_other_tabs(window: &web_sys::Window, ctx: &egui::Context, inbox: PrefsInbox) {
+        let ctx = ctx.clone();
+        let on_storage = wasm_bindgen::closure::Closure::<dyn FnMut(web_sys::StorageEvent)>::new(move |e: web_sys::StorageEvent| {
+            if let Some(prefs) = crate::settings_written(e.key().as_deref(), e.new_value()) {
+                inbox.set(Some(prefs));
+                ctx.request_repaint();
+            }
+        });
+        let _ = window.add_event_listener_with_callback("storage", on_storage.as_ref().unchecked_ref());
+        // The listener lives as long as the page.
+        on_storage.forget();
+    }
+
    const JAPANESE_FONT_PATH: &str = "./fonts/BIZUDPGothic-Regular.ttf";

    type FontLoadResult = Rc<std::cell::RefCell<Option<Result<Vec<u8>, String>>>>;

    struct Shell {
        app: SolveApp,
+        launch: crate::Launch,
+        linked: crate::linked::Download,
+        full_url: Option<String>,
        api: Api,
        files: Rc<Files>,
        /// When the last autosave was (seconds), and the revision it holds (none stored: `None`).
@@ -109,11 +300,54 @@ mod web {
        /// The language the fonts were last set up for (a CJK UI leads with the CJK face).
        font_language: String,
        space_mouse: SpaceMouse,
+        wheel_gestures: solidcraft_ui_egui::WebWheelGestures,
+        /// The settings this tab wrote or loaded last, and those another tab wrote since (#8644).
+        prefs_writer: crate::PrefsWriter,
+        other_tab_prefs: PrefsInbox,
    }

    impl Shell {
+        /// The settings as they are kept between visits: with the user's own language, not a
+        /// session-only English fallback.
+        fn persisted_prefs(&mut self) -> String {
+            let saved = self.font.persisted_language(&self.app.preferences.language).to_owned();
+            let live = std::mem::replace(&mut self.app.preferences.language, saved);
+            let prefs = self.app.prefs();
+            self.app.preferences.language = live;
+            prefs
+        }
+
+        /// A settings change goes to the browser's storage in the frame it is made, and from
+        /// there to the other open tabs (#8644). Input is what changes settings, so a frame
+        /// without any is skipped; eframe's own save still catches anything else.
+        fn store_prefs(&mut self, ctx: &egui::Context) {
+            if !self.launch.persists() || ctx.input(|i| i.events.is_empty()) {
+                return;
+            }
+            let prefs = self.persisted_prefs();
+            let Some(prefs) = self.prefs_writer.take(prefs) else { return };
+            let stored =
+                web_sys::window().and_then(|w| w.local_storage().ok().flatten()).map(|s| s.set_item(solidcraft_ui_egui::prefs::STORAGE_KEY, &prefs));
+            if !matches!(stored, Some(Ok(()))) {
+                log::warn!("settings: the browser's storage did not take them; they are saved again later");
+                self.prefs_writer = crate::PrefsWriter::default();
+            }
+        }
+
+        /// Settings another tab wrote replace this tab's, so this tab's own saves keep them
+        /// instead of putting its older copy back (#8644).
+        fn load_other_tabs_prefs(&mut self) {
+            let Some(prefs) = self.other_tab_prefs.take() else { return };
+            self.app.load_prefs(&prefs);
+            let held = self.persisted_prefs();
+            self.prefs_writer.loaded(held);
+        }
+
        /// Files from the computer, writes to store, messages and the autosave.
        fn files_tick(&mut self, ctx: &egui::Context) {
+            if !self.launch.persists() {
+                return;
+            }
            if self.files.ctx.borrow().is_none() {
                *self.files.ctx.borrow_mut() = Some(ctx.clone());
            }
@@ -155,6 +389,10 @@ mod web {
                !companion
            });
            for (name, bytes, intent) in incoming {
+                if intent == Intent::Theme {
+                    solidcraft_ui_egui::prefs::import_theme_bytes(&mut self.app, bytes);
+                    continue;
+                }
                let design = solidcraft_engine::io::is_design_path(&name);
                let path = if design && intent == Intent::Open {
                    // A design from the computer is kept in the browser (a copy), so Save works.
@@ -171,7 +409,7 @@ mod web {
                };
                match intent {
                    Intent::Open => self.app.open_path(&path),
-                    Intent::Insert => self.app.drop_path(&path),
+                    Intent::Insert | Intent::Theme => self.app.drop_path(&path),
                }
                self.files.panel.set(false);
            }
@@ -207,13 +445,15 @@ mod web {
        fn sync_recents(&mut self) {
            let mut entries = self.files.entries.borrow().clone();
            entries.sort_by(|a, b| b.modified.total_cmp(&a.modified));
+            let forgotten = self.app.home.forgotten.clone();
            let recent = &mut self.app.home.recent;
            let known = self.files.disk_known.borrow().clone();
            // A design on the computer's disk stays listed while its file is remembered.
            recent.retain(|p| vfs::exists(p) || disk::parse(p).is_some_and(|(id, _)| known.contains(id)));
            for e in entries.iter().filter(|e| solidcraft_engine::io::is_design_path(&e.name)) {
                let p = format!("{}{}", files::OPFS, e.name);
-                if !recent.contains(&p) {
+                // A design the user removed from the list is not added back while it is stored.
+                if !recent.contains(&p) && !forgotten.contains(&p) {
                    recent.push(p);
                }
            }
@@ -222,6 +462,10 @@ mod web {
            let recovered = self.files.recovery.borrow().as_ref().and_then(|(_, p)| p.clone());
            let keep = recent.iter().chain(recovered.as_ref()).filter_map(|p| disk::parse(p)).map(|(id, _)| id.to_string()).collect();
            disk::prune(keep);
+            // Drop forgotten entries whose stored design is gone, so the set does not grow without bound.
+            let stored: std::collections::BTreeSet<String> =
+                entries.iter().filter(|e| solidcraft_engine::io::is_design_path(&e.name)).map(|e| format!("{}{}", files::OPFS, e.name)).collect();
+            self.app.home.forgotten.retain(|p| stored.contains(p));
        }

        /// The stored designs: open, insert, rename, delete, download; open from the computer.
@@ -229,24 +473,22 @@ mod web {
            if !self.files.panel.get() {
                return;
            }
-            let mut open = true;
            let mut act: Option<(&'static str, String)> = None;
-            egui::Window::new("Files in this browser")
-                .open(&mut open)
-                .collapsible(false)
-                .resizable(true)
-                .default_width(520.0)
-                .pivot(egui::Align2::CENTER_CENTER)
-                .default_pos(ctx.content_rect().center())
-                .show(ctx, |ui| {
+            let closed = solidcraft_ui_egui::ui_kit::Window::new(egui::Id::new("sc_browser_files"), "folder", "Files in this browser")
+                // Room for long names; the kit still caps the window at the browser's width.
+                .cards(4.0)
+                .show_body(ctx, |ui| {
                    ui.horizontal(|ui| {
-                        if ui.button("Open from computer…").clicked() {
+                        if ui_kit::button(ui, "Open from computer…", ui_kit::Button::Normal).clicked() {
                            files::pick_from_disk(&self.files, Intent::Open);
                        }
-                        if ui.button("Insert from computer…").on_hover_text("STEP, 3MF or STL into the open design").clicked() {
+                        if ui_kit::button(ui, "Insert from computer…", ui_kit::Button::Normal)
+                            .on_hover_text(solidcraft_ui_egui::i18n::tr("web.files.insert_drawings_hint"))
+                            .clicked()
+                        {
                            files::pick_from_disk(&self.files, Intent::Insert);
                        }
-                        if ui.button("Download open design").clicked() {
+                        if ui_kit::button(ui, "Download open design", ui_kit::Button::Normal).clicked() {
                            act = Some(("download_open", String::new()));
                        }
                    });
@@ -262,63 +504,67 @@ mod web {
                        return;
                    }
                    let entries = self.files.entries.borrow().clone();
-                    if entries.is_empty() {
-                        ui.label("Designs you save appear here. They stay in this browser.");
-                    }
                    egui::ScrollArea::vertical().max_height(360.0).show(ui, |ui| {
-                        egui::Grid::new("opfs_files").num_columns(3).spacing([12.0, 6.0]).show(ui, |ui| {
+                        // The name takes the width the size and the actions leave (#8097).
+                        let empty = "Designs you save appear here. They stay in this browser.";
+                        ui_kit::name_list(ui, "opfs_files", &["Name", "Size", "Actions"], empty, |list| {
                            for e in &entries {
-                                match &mut self.renaming {
-                                    Some((from, to)) if *from == e.name => {
-                                        let r = ui.add(egui::TextEdit::singleline(to).desired_width(200.0));
-                                        if std::mem::take(&mut self.rename_focus) {
-                                            r.request_focus();
-                                        }
-                                        if r.lost_focus() {
-                                            act = Some(if ui.input(|i| i.key_pressed(egui::Key::Enter)) {
-                                                ("rename", to.clone())
-                                            } else {
-                                                ("rename_cancel", String::new())
-                                            });
+                                list.row(&e.name, |row| {
+                                    match &mut self.renaming {
+                                        Some((from, to)) if *from == e.name => row.cell(|ui| {
+                                            let r =
+                                                ui_kit::cell_editor(ui, ui.make_persistent_id(("stored_file_name", from.as_str())), to, "", false);
+                                            if std::mem::take(&mut self.rename_focus) {
+                                                r.request_focus();
+                                            }
+                                            if r.lost_focus() {
+                                                act = Some(if ui.input(|i| i.key_pressed(egui::Key::Enter)) {
+                                                    ("rename", to.clone())
+                                                } else {
+                                                    ("rename_cancel", String::new())
+                                                });
+                                            }
+                                        }),
+                                        _ => {
+                                            row.name(&e.name);
                                        }
                                    }
-                                    _ => {
-                                        ui.label(&e.name);
-                                    }
-                                }
-                                ui.label(format!("{:.1} KB", e.size as f64 / 1024.0));
-                                ui.horizontal(|ui| {
-                                    if ui.small_button("Open").clicked() {
-                                        act = Some(("open", e.name.clone()));
-                                    }
-                                    let design = solidcraft_engine::io::is_design_path(&e.name);
-                                    if !design && ui.small_button("Insert").on_hover_text("Into the open design (STEP, 3MF, STL)").clicked() {
-                                        act = Some(("insert", e.name.clone()));
-                                    }
-                                    if ui.small_button("Rename").clicked() {
-                                        self.renaming = Some((e.name.clone(), e.name.clone()));
-                                        self.rename_focus = true;
-                                    }
-                                    if ui
-                                        .small_button("Save to computer…")
-                                        .on_hover_text("A copy in a file you choose; the stored design stays here")
-                                        .clicked()
-                                    {
-                                        act = Some(("save_copy", e.name.clone()));
-                                    }
-                                    if ui.small_button("Download").clicked() {
-                                        act = Some(("download", e.name.clone()));
-                                    }
-                                    if ui.small_button("Delete").clicked() {
-                                        act = Some(("delete", e.name.clone()));
-                                    }
+                                    row.cell(|ui| ui.label(format!("{:.1} KB", e.size as f64 / 1024.0)));
+                                    row.cell(|ui| {
+                                        if ui_kit::button(ui, "Open", ui_kit::Button::Small).clicked() {
+                                            act = Some(("open", e.name.clone()));
+                                        }
+                                        let design = solidcraft_engine::io::is_design_path(&e.name);
+                                        if !design
+                                            && ui_kit::button(ui, "Insert", ui_kit::Button::Small)
+                                                .on_hover_text(solidcraft_ui_egui::i18n::tr("web.files.insert_stored_drawings_hint"))
+                                                .clicked()
+                                        {
+                                            act = Some(("insert", e.name.clone()));
+                                        }
+                                        if ui_kit::button(ui, "Rename", ui_kit::Button::Small).clicked() {
+                                            self.renaming = Some((e.name.clone(), e.name.clone()));
+                                            self.rename_focus = true;
+                                        }
+                                        if ui_kit::button(ui, "Save to computer…", ui_kit::Button::Small)
+                                            .on_hover_text("A copy in a file you choose; the stored design stays here")
+                                            .clicked()
+                                        {
+                                            act = Some(("save_copy", e.name.clone()));
+                                        }
+                                        if ui_kit::button(ui, "Download", ui_kit::Button::Small).clicked() {
+                                            act = Some(("download", e.name.clone()));
+                                        }
+                                        if ui_kit::button(ui, "Delete", ui_kit::Button::Small).clicked() {
+                                            act = Some(("delete", e.name.clone()));
+                                        }
+                                    });
                                });
-                                ui.end_row();
                            }
                        });
                    });
                });
-            if !open {
+            if closed {
                self.files.panel.set(false);
                self.renaming = None;
            }
@@ -360,6 +606,8 @@ mod web {
                "delete" => {
                    files::delete(&self.files, &name);
                    self.app.home.recent.retain(|r| *r != path);
+                    // The file is gone, so there is nothing left to keep forgotten.
+                    self.app.home.forgotten.remove(&path);
                }
                "rename_cancel" => self.renaming = None,
                "rename" => {
@@ -373,6 +621,10 @@ mod web {
                                        *r = new.clone();
                                    }
                                }
+                                // A forgotten design follows its new name.
+                                if self.app.home.forgotten.remove(&old) {
+                                    self.app.home.forgotten.insert(new);
+                                }
                            }
                            Err(e) => self.app.set_status(e, true),
                        }
@@ -386,30 +638,39 @@ mod web {
        fn recovery_prompt(&mut self, ctx: &egui::Context) {
            let Some((name, path)) = self.files.recovery.borrow().clone() else { return };
            let mut answer = None;
-            egui::Window::new("Recover unsaved work?").collapsible(false).resizable(false).anchor(egui::Align2::CENTER_CENTER, [0.0, 0.0]).show(
-                ctx,
-                |ui| {
+            let _ = solidcraft_ui_egui::ui_kit::Window::new(egui::Id::new("sc_browser_recovery"), "restore", "Recover unsaved work?")
+                .required()
+                .show_body(ctx, |ui| {
                    ui.label(format!("“{name}” had unsaved changes when this page last closed."));
                    ui.horizontal(|ui| {
-                        if ui.button("Recover").clicked() {
+                        if ui_kit::button(ui, "Recover", ui_kit::Button::Normal).clicked() {
                            answer = Some(true);
                        }
-                        if ui.button("Discard").clicked() {
+                        if ui_kit::button(ui, "Discard", ui_kit::Button::Normal).clicked() {
                            answer = Some(false);
                        }
                    });
-                },
-            );
+                });
            let Some(recover) = answer else { return };
-            *self.files.recovery.borrow_mut() = None;
            if recover {
-                self.app.open_path(&files::recovery_path());
+                let recovery = match files::prepare_recovery(path.as_deref()) {
+                    Ok(recovery) => recovery,
+                    Err(error) => {
+                        self.app.set_status(error, true);
+                        return;
+                    }
+                };
+                self.app.open_path(&recovery);
+                if self.app.session.path.as_deref() != Some(recovery.as_str()) {
+                    return;
+                }
                // It belongs to its own file again (saving goes there); it is unsaved.
                self.app.session.path = path;
                self.app.session.doc_mut().name = name;
                self.app.session.mark_unsaved();
                self.app.home.open = false;
            }
+            *self.files.recovery.borrow_mut() = None;
            files::autosave(&self.files, None);
        }

@@ -480,32 +741,61 @@ mod web {

    impl eframe::App for Shell {
        fn logic(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
+            // First: a language another tab chose fetches its font this frame.
+            self.load_other_tabs_prefs();
            self.tick_font(ctx);
            self.app.logic(ctx);
            self.api.poll();
            self.space_mouse.logic(&mut self.app, ctx);
            self.files_tick(ctx);
            UNSAVED.with(|u| u.set(solidcraft_ui_egui::documents::any_dirty(&self.app)));
+            DESIGN_SHOWN.with(|d| d.set(solidcraft_ui_egui::toolbar::design_shown(&self.app)));
        }
        fn raw_input_hook(&mut self, ctx: &egui::Context, raw: &mut egui::RawInput) {
-            files::take_drops(&self.files, raw);
+            let now = raw.time.unwrap_or_else(|| ctx.input(|i| i.time));
+            if let Some(delay) = self.wheel_gestures.update(raw, now) {
+                ctx.request_repaint_after(delay);
+            }
+            if self.launch.persists() {
+                let theme = solidcraft_ui_egui::prefs::theme_drop_target(&self.app, ctx);
+                files::take_drops(&self.files, raw, theme);
+            } else {
+                raw.dropped_files.clear();
+            }
            // Before the app's own hook, which adds the control channel's events.
            self.space_mouse.raw_input_hook(ctx, self.app.preferences.space_mouse_enabled, raw);
            self.app.raw_input_hook(raw);
        }
        fn ui(&mut self, ui: &mut egui::Ui, _frame: &mut eframe::Frame) {
+            self.linked.tick(&mut self.app, ui.ctx());
+            UNSAVED.with(|u| u.set(self.launch.persists() && solidcraft_ui_egui::documents::any_dirty(&self.app)));
+            if self.launch.embed {
+                ui_kit::Container::new(ui.ctx(), ui_kit::Surface::Chrome).edge("embed_header", ui_kit::Edge::Top).show(ui, |ui| {
+                    if ui_kit::button(ui, solidcraft_ui_egui::i18n::tr("web.open_full"), ui_kit::Button::Normal).clicked()
+                        && let (Some(window), Some(url)) = (web_sys::window(), &self.full_url)
+                    {
+                        let _ = window.open_with_url_and_target_and_features(url, "_blank", "noopener");
+                    }
+                });
+            }
            self.app.ui(ui);
            let ctx = ui.ctx().clone();
-            self.file_panel(&ctx);
-            self.recovery_prompt(&ctx);
+            if self.launch.persists() {
+                self.file_panel(&ctx);
+                self.recovery_prompt(&ctx);
+            }
            self.watch_text_for_font(&ctx);
+            self.store_prefs(&ctx);
+        }
+        fn persist_egui_memory(&self) -> bool {
+            self.launch.persists()
        }
        fn save(&mut self, storage: &mut dyn eframe::Storage) {
-            // Persist the user's own language, not a session-only English fallback.
-            let saved = self.font.persisted_language(&self.app.preferences.language).to_owned();
-            let live = std::mem::replace(&mut self.app.preferences.language, saved);
-            storage.set_string(solidcraft_ui_egui::prefs::STORAGE_KEY, self.app.prefs());
-            self.app.preferences.language = live;
+            if !self.launch.persists() {
+                return;
+            }
+            let prefs = self.persisted_prefs();
+            storage.set_string(solidcraft_ui_egui::prefs::STORAGE_KEY, prefs);
        }
    }

@@ -519,15 +809,15 @@ mod web {

    /// Render with WebGL2: asked for now (`?webgl`, remembered) or before (until `?webgpu`).
    fn webgl() -> bool {
-        let storage = web_sys::window().and_then(|w| w.local_storage().ok().flatten());
+        let storage = crate::Launch::parse(&query()).persists().then(|| web_sys::window().and_then(|w| w.local_storage().ok().flatten())).flatten();
        let q = query();
-        if q.contains("webgl") {
+        if crate::query_flag(&q, "webgl") {
            if let Some(s) = &storage {
                let _ = s.set_item(WEBGL_KEY, "1");
            }
            return true;
        }
-        if q.contains("webgpu") {
+        if crate::query_flag(&q, "webgpu") {
            if let Some(s) = &storage {
                let _ = s.remove_item(WEBGL_KEY);
            }
@@ -553,7 +843,12 @@ mod web {
        eframe::WebLogger::init(log::LevelFilter::Info).ok();
        wasm_bindgen_futures::spawn_local(async {
            let Some(window) = web_sys::window() else { return };
-            ask_before_unload(&window);
+            let launch = crate::Launch::parse(&query());
+            if launch.persists() {
+                ask_before_unload(&window);
+            }
+            leave_tab_switching_to_browser(&window);
+            keep_ctrl_w_for_the_design(&window);
            let Some(document) = window.document() else { return };
            let Some(canvas) = document.get_element_by_id(CANVAS_ID).and_then(|e| e.dyn_into::<web_sys::HtmlCanvasElement>().ok()) else {
                log::error!("missing <canvas id=\"{CANVAS_ID}\">");
@@ -572,19 +867,24 @@ mod web {
                    Box::new(move |cc| {
                        solidcraft_ui_egui::fonts::setup_fonts(&cc.egui_ctx);
                        let files = Rc::new(Files::default());
-                        files::start(&files);
+                        if launch.persists() {
+                            files::start(&files);
+                        }
                        let (panel, opener, saver, shown) = (files.clone(), files.clone(), files.clone(), files.clone());
                        let (restorable, restorer) = (files.clone(), files.clone());
-                        let services = Services {
+                        let services = if launch.embed { Services::default() } else { Services {
                            // Open shows the browser's open dialog for a design where it has one
-                            // (the file keeps its handle, so Save writes back to it); otherwise,
-                            // and for inserting STEP or meshes, the browser's files window.
-                            pick_open: Some(Box::new(move |exts: &[&str]| {
-                                if disk::handles_open(exts) {
-                                    return Box::pin(disk::pick_open(&opener));
+                            // (the file keeps its handle, so Save writes back to it), else the
+                            // browser's files window. A command that reads another kind of file
+                            // (Insert DXF or SVG, an image, a mesh, settings) gets a file dialog
+                            // offering that kind, and runs on the picked file.
+                            pick_open: Some(Box::new(move |exts: &[&str]| match disk::open_route(disk::supported(), exts) {
+                                disk::OpenRoute::Disk => Box::pin(disk::pick_open(&opener)),
+                                disk::OpenRoute::Upload => Box::pin(files::pick_upload(&opener, exts)),
+                                disk::OpenRoute::Panel => {
+                                    panel.panel.set(true);
+                                    Box::pin(std::future::ready(None))
                                }
-                                panel.panel.set(true);
-                                Box::pin(std::future::ready(None))
                            })),
                            // A design is saved to a file the user picks, or kept in the browser
                            // where the browser can't pick one; everything else is downloaded.
@@ -606,29 +906,37 @@ mod web {
                            })),
                            restore_file: Some(Box::new(move |path: &str| disk::restore(&restorer, path))),
                            download_design: Some(Box::new(files::download)),
+                            easyprint_upload: Some(std::sync::Arc::new(crate::easyprint::upload)),
                            browser_files: Some(Box::new(move || shown.panel.set(true))),
                            install_app: Some(crate::install::service(&cc.egui_ctx)),
                            ..Default::default()
-                        };
+                        }};
                        // Thumbnails of saves and start-page cards.
                        solidcraft_ui_egui::gpu::install_cpu_picture_renderer();
                        let (sender, receiver) = std::sync::mpsc::channel();
                        let mut app = SolveApp::new(Session::default(), services).with_control(receiver);
-                        if let Some(p) = cc.storage.and_then(|s| solidcraft_ui_egui::prefs::stored(|k| s.get_string(k))) {
+                        app.embedded = launch.embed;
+                        // Listening before reading: settings another tab writes from now on are
+                        // newer than those read here.
+                        let other_tab_prefs = PrefsInbox::default();
+                        if launch.persists() {
+                            hear_settings_from_other_tabs(&window, &cc.egui_ctx, other_tab_prefs.clone());
+                        }
+                        if launch.persists() && let Some(p) = cc.storage.and_then(|s| solidcraft_ui_egui::prefs::stored(|k| s.get_string(k))) {
                            app.load_prefs(&p);
                        }
                        if let Some(rs) = &cc.wgpu_render_state {
                            // eframe's web painter has no stencil buffer.
                            app.set_wgpu(rs, DEPTH_BITS, 0, 1);
                        }
-                        if query().contains("sample") {
+                        if launch.open.is_none() && crate::query_flag(&query(), "sample") {
                            if let Err(e) = app.session.run_script(&solidcraft_engine::sample::script()) {
                                app.set_status(format!("sample: {e}"), true);
                            }
                            app.session.doc_mut().name = "Sample Plate".into();
                            app.session.mark_saved();
                        }
-                        if !query().contains("sample") {
+                        if launch.open.is_none() && !crate::query_flag(&query(), "sample") {
                            // The empty design takes Units of new designs (#1205). The sample
                            // part is built in millimetres and is left that way.
                            solidcraft_ui_egui::prefs::apply_new_design(&mut app);
@@ -637,8 +945,13 @@ mod web {
                        }
                        let api = Api::install(sender, cc.egui_ctx.clone()).map_err(|e| format!("SolidCraft browser API: {e:?}"))?;
                        let font_language = app.preferences.language.clone();
+                        let linked = crate::linked::Download::start(launch.open.as_deref(), &cc.egui_ctx);
+                        let full_url = window.location().href().ok().and_then(|value| url::Url::parse(&value).ok()).map(|url| launch.full_app_url(url));
                        Ok(Box::new(Shell {
                            app,
+                            launch,
+                            linked,
+                            full_url,
                            api,
                            files,
                            autosaved_at: f64::NEG_INFINITY,
@@ -651,6 +964,9 @@ mod web {
                            cjk_bytes: None,
                            font_language,
                            space_mouse: SpaceMouse::default(),
+                            wheel_gestures: solidcraft_ui_egui::WebWheelGestures::default(),
+                            prefs_writer: crate::PrefsWriter::default(),
+                            other_tab_prefs,
                        }))
                    }),
                )
@@ -676,3 +992,139 @@ fn main() {
 fn main() {
    eprintln!("solidcraft-web only runs in the browser: build it with `trunk build --release` in apps/solidcraft-web");
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn link_query_decodes_once_and_embed_disables_persistence() {
+        assert!(!query_flag("?open=https://example.org/webgl?sample", "webgl"));
+        assert!(!query_flag("?open=https://example.org/webgl?sample", "sample"));
+        assert!(query_flag("?embed&webgl", "webgl"));
+        let launch = Launch::parse("?embed&open=https%3A%2F%2Fexample.org%2Farm.solidcraft%3Fx%3Da%2520b%26y%3D1");
+        assert_eq!(launch.open.as_deref(), Some("https://example.org/arm.solidcraft?x=a%20b&y=1"));
+        assert!(launch.embed);
+        assert!(!launch.persists());
+        assert!(!Launch::parse("?embed").embed);
+        assert!(!Launch::parse("?other=embed&reopen=https://example.org").embed);
+        assert!(Launch::parse("?open=https://example.org/a").persists());
+        assert_eq!(Launch::parse("?open=first&open=second").open.as_deref(), Some("first"));
+        let launch = Launch::parse("?embed&open=/dutchman/jobs/abc/part.solidcraft%3Fx%3Da%2520b");
+        assert!(launch.embed);
+        assert!(!launch.persists());
+        let page = url::Url::parse("http://solidcraft.io/?embed#view").expect("synthetic page");
+        let full = url::Url::parse(&launch.full_app_url(page)).expect("full app URL");
+        let reopened = Launch::parse(full.query().unwrap_or_default());
+        assert_eq!(reopened.open, launch.open);
+        assert_eq!(reopened.open.as_deref(), Some("/dutchman/jobs/abc/part.solidcraft?x=a%20b"));
+        assert!(!reopened.embed);
+        assert!(reopened.persists());
+        assert!(full.fragment().is_none());
+    }
+
+    #[test]
+    fn design_links_refuse_hostile_schemes_credentials_and_sizes() {
+        assert!(design_url("https://example.org/arm.solidcraft?download=1", "http://solidcraft.io").is_ok());
+        for value in [
+            "http://example.org/a",
+            "data:application/json,{}",
+            "blob:https://example.org/a",
+            "javascript:alert(1)",
+            "https://user:secret@example.org/a",
+            "//evil.example/x",
+            "/../x",
+            "/%2e%2e/x",
+            "/a/%2E./x",
+            "/a%2f..%2fx",
+            "/a\\x",
+            "/a%5cx",
+            "/a\nx",
+            "/a%00x",
+            "/a%7fx",
+            "/a%C2%85x",
+            "/a%3f/../x",
+            "/a/..#view",
+            "/a/..?download=1",
+            "https://solidcraft.io/a/../x",
+            "http://user:secret@solidcraft.io/x",
+            "http://solidcraft.io.evil.example/x",
+            "http://solidcraft.io:8080/x",
+            "relative.solidcraft",
+            "",
+        ] {
+            assert!(design_url(value, "http://solidcraft.io").is_err(), "{value}");
+        }
+        assert!(design_url(&format!("https://example.org/{}", "x".repeat(16_384)), "http://solidcraft.io").is_err());
+        assert!(design_url("http://redirect.example.org/a", "http://solidcraft.io").is_err());
+
+        let cap = solidcraft_engine::io::MAX_DESIGN_BYTES;
+        assert!(check_download_size(0, cap as u64).is_ok());
+        assert!(check_download_size(0, cap as u64 + 1).is_err());
+        assert!(check_download_size(cap - 2, 2).is_ok());
+        assert!(check_download_size(cap - 2, 3).is_err());
+        assert!(check_download_size(0, u64::MAX).is_err());
+        assert!(check_download_size(cap, 1).is_err());
+        assert!(check_download_size(usize::MAX, 0).is_err());
+    }
+
+    #[test]
+    fn design_links_allow_same_origin_paths_and_redirects() {
+        for origin in ["http://solidcraft.io", "https://solidcraft.io", "http://solidcraft.io:8080"] {
+            assert_eq!(design_url("/a/b.solidcraft", origin).map(|url| url.to_string()), Ok(format!("{origin}/a/b.solidcraft")));
+            assert!(design_url(&format!("{origin}/x"), origin).is_ok());
+            // Final response URLs follow the same origin and scheme rules as the request.
+            assert!(design_url("https://docs.solidcraft.io/x", origin).is_ok());
+            assert!(design_url("http://other/x", origin).is_err());
+        }
+        assert!(design_url("http://solidcraft.io/x", "https://solidcraft.io").is_err());
+        assert!(design_url("http://SOLIDCRAFT.io:80/x", "http://solidcraft.io").is_ok());
+    }
+
+    #[test]
+    fn only_ctrl_tab_is_left_to_the_browser() {
+        // Ctrl+Tab and Ctrl+Shift+Tab (the event's key is "Tab" either way) switch browser tabs.
+        assert!(browser_switches_tabs("Tab", true));
+        // Tab and Shift+Tab move between the app's fields; Ctrl with other keys stays the app's.
+        assert!(!browser_switches_tabs("Tab", false));
+        assert!(!browser_switches_tabs("s", true));
+    }
+
+    #[test]
+    fn ctrl_w_closes_the_design_not_the_tab() {
+        // Ctrl+W and ⌘W (either case of the key) close the design shown.
+        assert!(closes_design("w", true, false, false, true));
+        assert!(closes_design("W", true, false, false, true));
+        // On the start page the browser closes the tab.
+        assert!(!closes_design("w", true, false, false, false));
+        // Ctrl+Shift+W (close the window), plain W and other keys stay the browser's or the app's.
+        assert!(!closes_design("W", true, true, false, true));
+        assert!(!closes_design("w", true, false, true, true));
+        assert!(!closes_design("w", false, false, false, true));
+        assert!(!closes_design("s", true, false, false, true));
+    }
+
+    /// A tab writes its settings when they change, and not again while they stay the same; the
+    /// settings it loaded from another tab aren't written back (#8644).
+    #[test]
+    fn changed_settings_are_written_once_and_loaded_ones_not_at_all() {
+        let mut writer = PrefsWriter::default();
+        assert_eq!(writer.take(r#"{"a":1}"#.into()).as_deref(), Some(r#"{"a":1}"#), "the first settings are written");
+        assert_eq!(writer.take(r#"{"a":1}"#.into()), None, "the same settings are not written again");
+        assert_eq!(writer.take(r#"{"a":2}"#.into()).as_deref(), Some(r#"{"a":2}"#), "a change is written at once");
+        writer.loaded(r#"{"a":3}"#.into());
+        assert_eq!(writer.take(r#"{"a":3}"#.into()), None, "settings from another tab are not written back");
+        assert_eq!(writer.take(r#"{"a":4}"#.into()).as_deref(), Some(r#"{"a":4}"#), "this tab's next change is written");
+    }
+
+    /// Only the settings another tab wrote are loaded: not other keys, and not settings taken
+    /// away by clearing the site's data (#8644).
+    #[test]
+    fn only_settings_another_tab_wrote_are_loaded() {
+        let key = solidcraft_ui_egui::prefs::STORAGE_KEY;
+        assert_eq!(settings_written(Some(key), Some("{}".into())).as_deref(), Some("{}"));
+        assert_eq!(settings_written(Some("solidcraft.webgl"), Some("1".into())), None);
+        assert_eq!(settings_written(Some(key), None), None, "removed settings leave this tab's");
+        assert_eq!(settings_written(None, None), None, "clearing all storage leaves this tab's settings");
+    }
+}
@@ -246,11 +246,11 @@ mod tests {
        let axis =
            |source, rest, full| solidcraft_ui_egui::space_mouse::AxisCalibration { source, reversed: false, rest, dead_zone: 0, full: [full; 2] };
        // A short-range device: 15 of its 50 is under the raw dead zone, but 105 of 350 calibrated.
-        let short = Calibration { dead_zone_share: 0.0, axes: std::array::from_fn(|r| axis(r, 0, 50)) };
+        let short = Calibration { dead_zone_share: 0.0, kind: Default::default(), axes: std::array::from_fn(|r| axis(r, 0, 50)) };
        let push = Axes { translation: [15, 0, 0], rotation: [0; 3] };
        assert!(!push.moving() && moving(push, Some(short)));
        // A device resting at 100 on every axis: past the raw dead zone, but at rest calibrated.
-        let offset = Calibration { dead_zone_share: 0.0, axes: std::array::from_fn(|r| axis(r, 100, 350)) };
+        let offset = Calibration { dead_zone_share: 0.0, kind: Default::default(), axes: std::array::from_fn(|r| axis(r, 100, 350)) };
        let resting = Axes { translation: [100; 3], rotation: [100; 3] };
        assert!(resting.moving() && !moving(resting, Some(offset)));
        // Without a calibration, as read.
@@ -7,9 +7,15 @@ license.workspace = true
 publish = false
 default-run = "solidcraft"

+[features]
+default = ["raytrace-cpu", "bundled-render-library"]
+bundled-render-library = ["solidcraft-engine/bundled-render-library"]
+raytrace-cpu = ["solidcraft-engine/raytrace-cpu"]
+
 # The workspace lints, except unsafe_code: denied, not forbidden, so that src/open_documents.rs
-# (macOS file-open events), src/native_crash.rs (Windows exception filter) and src/native_frame.rs
-# (Windows resize border) can allow it: none has a safe API. Keep the rest in sync with [workspace.lints].
+# (macOS file-open events), src/native_crash.rs (Windows exception filter), src/native_crash_macos.rs
+# (macOS crash signal handler) and src/native_frame.rs (Windows resize border, taskbar icon) can
+# allow it: none has a safe API. Keep the rest in sync with [workspace.lints].
 [lints.rust]
 unsafe_code = "deny"

@@ -22,10 +28,13 @@ neg_cmp_op_on_partial_ord = "allow"

 [dependencies]
 solidcraft-engine = { workspace = true }
+# The D3D12 shader compiler the window starts with (#6756).
+solidcraft-gpu = { workspace = true }
 solidcraft-ui-egui = { workspace = true }
 solidcraft-space-mouse = { workspace = true }
 eframe = { workspace = true, features = ["default_fonts", "wgpu", "accesskit", "wayland", "x11", "links"] }
 egui = { workspace = true }
+serde = { workspace = true }
 serde_json = { workspace = true }
 log = { workspace = true }
 rfd = { workspace = true }
@@ -49,9 +58,15 @@ hidapi = { version = "2.6.7", default-features = false, features = ["windows-nat
 # The main window's handle for src/native_frame.rs (already in the tree through eframe and winit).
 raw-window-handle = "0.6"
 # Native crash capture (src/native_crash.rs): the exception filter, the faulting module, a minidump.
-# The window's resize border and DPI size (src/native_frame.rs): the window procedure, hit test, DPI.
+# The window's resize border, DPI size and class icon (src/native_frame.rs): the window procedure, hit
+# test, DPI, the exe's icon.
+# Finding 3D mice through Plug and Play without asking other devices anything (src/space_mouse/windows_hid.rs).
 windows-sys = { version = "0.61", features = [
+    "Win32_Devices_DeviceAndDriverInstallation",
+    "Win32_Devices_HumanInterfaceDevice",
+    "Win32_Devices_Properties",
    "Win32_Foundation",
+    "Win32_Graphics_Gdi",
    "Win32_Security",
    "Win32_Storage_FileSystem",
    "Win32_System_Diagnostics_Debug",
@@ -65,19 +80,29 @@ windows-sys = { version = "0.61", features = [
 ] }

 [target.'cfg(target_os = "macos")'.dependencies]
+muda = { version = "0.21.2", default-features = false }
 # The 3D mouse through the 3Dconnexion driver, which keeps the device to itself (src/space_mouse.rs).
 solidcraft-3dx-client = { workspace = true }
 # The 3D mouse (src/space_mouse.rs), in the shared-device open mode so that a running 3DxWare
 # driver does not shut the app out.
 hidapi = { version = "2.6.7", default-features = false, features = ["macos-shared-device"] }
-# Files opened from Finder and the Dock (src/open_documents.rs); all already come with eframe and rfd.
+# Files opened from Finder and the Dock (src/open_documents.rs), and the fullscreen title-bar
+# inset (src/main.rs); all already come with eframe and rfd.
 objc2 = "0.6"
-objc2-app-kit = { version = "0.3", default-features = false, features = ["std", "NSApplication", "NSResponder"] }
-objc2-foundation = { version = "0.3", default-features = false, features = ["std", "block2", "NSArray", "NSNotification", "NSOperation", "NSString", "NSURL"] }
+objc2-app-kit = { version = "0.3", default-features = false, features = ["std", "NSApplication", "NSResponder", "NSWindow"] }
+objc2-foundation = { version = "0.3", default-features = false, features = ["std", "block2", "NSArray", "NSNotification", "NSOperation", "NSProcessInfo", "NSString", "NSURL"] }
 block2 = "0.6"
+# Native crash capture (src/native_crash_macos.rs): the signal handler, the faulting module
+# (already in the tree through many crates).
+libc = "0.2"

 [target.'cfg(all(unix, not(target_os = "macos")))'.dependencies]
 winit = { version = "0.30", default-features = false, features = ["x11"] }
+# Bringing the window forward on X11 when a close asks about unsaved designs (src/come_forward.rs):
+# the window's id, and the window manager request winit doesn't send (MIT OR Apache-2.0; both
+# already in the tree through eframe and winit).
+raw-window-handle = "0.6"
+x11rb = { version = "0.13", default-features = false }

 [build-dependencies]
 embed-resource = "3.0.11"
@@ -4,6 +4,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
    let icon = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("../../assets/icons/app/windows/exports/solidcraft-executable.ico");
    println!("cargo:rerun-if-changed={}", icon.display());
    println!("cargo:rerun-if-changed=build.rs");
+    println!("cargo:rerun-if-env-changed=CARGO_PKG_VERSION");
    if std::env::var("CARGO_CFG_TARGET_OS")? != "windows" {
        return Ok(());
    }
@@ -11,7 +12,21 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
    let copy = out.join("solidcraft.ico");
    std::fs::copy(icon, &copy)?;
    let rc = out.join("solidcraft.rc");
-    std::fs::write(&rc, format!("1 ICON \"{}\"\n", copy.display().to_string().replace('\\', "/")))?;
+    let icon_line = format!("1 ICON \"{}\"\n", copy.display().to_string().replace('\\', "/"));
+    std::fs::write(&rc, format!("{icon_line}{}", version_resource(&std::env::var("CARGO_PKG_VERSION")?)))?;
    embed_resource::compile_for(&rc, ["solidcraft"], embed_resource::NONE).manifest_required()?;
    Ok(())
 }
+
+/// The Windows version resource (what Explorer's Details tab shows and what a launcher reads).
+/// `FileVersion` and `ProductVersion` are the package version verbatim (`0.25.1`, `0.26.0-rc.1`):
+/// ArtCraft's launcher parses the `ProductVersion` string as semver, so a fourth `.0` would not
+/// read. The binary `FILEVERSION` fields need four numbers and take the leading `major.minor.patch`.
+fn version_resource(version: &str) -> String {
+    let mut numbers = version.split(['-', '+']).next().unwrap_or("").split('.').map(|p| p.parse::<u16>().unwrap_or(0));
+    let mut next = || numbers.next().unwrap_or(0);
+    let (major, minor, patch) = (next(), next(), next());
+    format!(
+        "1 VERSIONINFO\nFILEVERSION {major},{minor},{patch},0\nPRODUCTVERSION {major},{minor},{patch},0\nFILEOS 0x40004\nFILETYPE 0x1\n{{\nBLOCK \"StringFileInfo\"\n{{\nBLOCK \"040904B0\"\n{{\nVALUE \"CompanyName\", \"SolidCraft contributors\"\nVALUE \"FileDescription\", \"SolidCraft, parametric 3D CAD\"\nVALUE \"FileVersion\", \"{version}\"\nVALUE \"InternalName\", \"solidcraft\"\nVALUE \"OriginalFilename\", \"solidcraft.exe\"\nVALUE \"ProductName\", \"SolidCraft\"\nVALUE \"ProductVersion\", \"{version}\"\n}}\n}}\nBLOCK \"VarFileInfo\"\n{{\nVALUE \"Translation\", 0x0409, 1200\n}}\n}}\n"
+    )
+}
@@ -0,0 +1,234 @@
+//! Bringing the window forward when a close stops at "save changes?".
+//!
+//! A close from the taskbar or a window switcher reaches the window while another app has the
+//! focus. The prompt it opens is only seen once the window comes forward, so the window asks for
+//! the focus then. A window the user is already in is left alone.
+//!
+//! winit's Focus asks as an application, which a window manager with focus-stealing prevention
+//! (KWin's default) refuses for a window used before the switch away: it only marks the taskbar
+//! entry. On X11 the request is sent again with the source EWMH gives "direct user actions"
+//! (`_NET_ACTIVE_WINDOW`, source 2), which is what this is: the prompt is the rest of the user's
+//! close. Native Wayland has no way for a window to raise itself, so there the attention request
+//! (xdg-activation) lets the compositor raise it or mark its taskbar entry.
+//!
+//! When: not at once. KWin raises the window, then the taskbar's closing context menu hands the
+//! focus back to the app that had it, a few milliseconds later, and the window would flicker
+//! forward and back. So the window asks once the menu is gone, `FIRST_AFTER` the close. It asks
+//! again only if the focus is taken back right after it came (a slow menu) or never came; a later
+//! switch is the user's own, and the window stays where the user put it.
+
+use std::time::{Duration, Instant};
+
+/// From the close to the first request: past the taskbar menu's focus hand-back (2 to 11 ms on
+/// KDE Plasma 6), too short to notice.
+const FIRST_AFTER: Duration = Duration::from_millis(120);
+/// After the first request, how long the window asks again when it loses the focus: short of
+/// anything the user does next.
+const KEEP_ASKING: Duration = Duration::from_millis(400);
+/// The least time between two requests.
+const AGAIN_AFTER: Duration = Duration::from_millis(100);
+/// Focus lost this soon after a request was taken back by the taskbar menu; later, by the user.
+const TAKEN_BACK_WITHIN: Duration = Duration::from_millis(50);
+
+/// The window coming forward after a close that asks about unsaved designs.
+#[derive(Default)]
+pub struct ComeForward {
+    /// The first request and the end of asking; `None`: not asking.
+    window: Option<(Instant, Instant)>,
+    /// The last request.
+    last: Option<Instant>,
+    /// The window has had the focus since the last request.
+    held: bool,
+}
+
+/// What a frame does while the window is coming forward.
+#[derive(Debug, PartialEq)]
+enum Step {
+    /// Ask for the focus now.
+    Ask,
+    /// Look again after this long.
+    Wait(Duration),
+    /// Done asking.
+    Done,
+}
+
+impl ComeForward {
+    /// A close stopped at the prompt: ask for the focus shortly.
+    pub fn start(&mut self, now: Instant) {
+        let first = now + FIRST_AFTER;
+        self.window = Some((first, first + KEEP_ASKING));
+        self.last = None;
+        self.held = false;
+    }
+
+    /// Every frame: ask once the taskbar menu is gone, and again while the focus is taken back.
+    pub fn tick(&mut self, ctx: &egui::Context, frame: &eframe::Frame) {
+        if self.window.is_none() {
+            return;
+        }
+        let (focused, minimized) = ctx.input(|i| (i.viewport().focused, i.viewport().minimized));
+        // The app may be idle: a frame to look again.
+        match self.step(Instant::now(), focused) {
+            Step::Ask => {
+                bring(ctx, frame, minimized);
+                ctx.request_repaint_after(AGAIN_AFTER);
+            }
+            Step::Wait(after) => ctx.request_repaint_after(after),
+            Step::Done => {}
+        }
+    }
+
+    fn step(&mut self, now: Instant, focused: Option<bool>) -> Step {
+        let Some((first, until)) = self.window else { return Step::Done };
+        if now >= until {
+            self.window = None;
+            return Step::Done;
+        }
+        if now < first {
+            return Step::Wait(first - now);
+        }
+        let Some(last) = self.last else {
+            if focused == Some(true) {
+                // The user went back to the window already.
+                self.window = None;
+                return Step::Done;
+            }
+            self.last = Some(now);
+            return Step::Ask;
+        };
+        if focused == Some(true) {
+            self.held = true;
+            return Step::Wait(until - now);
+        }
+        if self.held {
+            if now.duration_since(last) >= TAKEN_BACK_WITHIN {
+                // The user switched away: leave the window there.
+                self.window = None;
+                return Step::Done;
+            }
+            self.held = false;
+        }
+        let next = last + AGAIN_AFTER;
+        if now < next {
+            return Step::Wait(next - now);
+        }
+        self.last = Some(now);
+        Step::Ask
+    }
+}
+
+/// Ask for the focus once.
+fn bring(ctx: &egui::Context, frame: &eframe::Frame, minimized: Option<bool>) {
+    #[cfg(all(unix, not(target_os = "macos")))]
+    let raised = match x11_activate(frame) {
+        Ok(sent) => sent,
+        Err(e) => {
+            log::warn!("bringing the window forward through X11: {e}");
+            false
+        }
+    };
+    #[cfg(not(all(unix, not(target_os = "macos"))))]
+    let raised = {
+        let _ = frame;
+        false
+    };
+    for c in commands(minimized, raised) {
+        ctx.send_viewport_cmd(c);
+    }
+}
+
+/// The viewport commands for a window in the background; `raised`: the X11 request went out,
+/// which also restores a minimized window.
+fn commands(minimized: Option<bool>, raised: bool) -> Vec<egui::ViewportCommand> {
+    if raised {
+        return vec![egui::ViewportCommand::Focus];
+    }
+    let mut commands = Vec::new();
+    if minimized == Some(true) {
+        commands.push(egui::ViewportCommand::Minimized(false));
+    }
+    commands.push(egui::ViewportCommand::Focus);
+    commands.push(egui::ViewportCommand::RequestUserAttention(egui::UserAttentionType::Informational));
+    commands
+}
+
+/// Ask the X11 window manager to activate the window as a user action. `Ok(false)`: the window
+/// isn't an X11 window (native Wayland).
+#[cfg(all(unix, not(target_os = "macos")))]
+fn x11_activate(frame: &eframe::Frame) -> Result<bool, String> {
+    use raw_window_handle::{HasWindowHandle, RawWindowHandle};
+    use x11rb::connection::Connection;
+    use x11rb::protocol::xproto::{ClientMessageEvent, ConnectionExt, EventMask};
+
+    let handle = frame.window_handle().map_err(|e| e.to_string())?;
+    let window = match handle.as_raw() {
+        RawWindowHandle::Xlib(h) => u32::try_from(h.window).map_err(|e| e.to_string())?,
+        RawWindowHandle::Xcb(h) => h.window.get(),
+        _ => return Ok(false),
+    };
+    // A connection of its own: winit's isn't reachable, and a close that asks is rare.
+    let (conn, screen) = x11rb::connect(None).map_err(|e| e.to_string())?;
+    let root = conn.setup().roots.get(screen).ok_or("no X11 screen")?.root;
+    let atom = conn.intern_atom(false, b"_NET_ACTIVE_WINDOW").map_err(|e| e.to_string())?.reply().map_err(|e| e.to_string())?.atom;
+    // Source 2: a direct user action; the time is the server's current time.
+    let event = ClientMessageEvent::new(32, window, atom, [2, x11rb::CURRENT_TIME, 0, 0, 0]);
+    conn.send_event(false, root, EventMask::SUBSTRUCTURE_REDIRECT | EventMask::SUBSTRUCTURE_NOTIFY, event).map_err(|e| e.to_string())?;
+    conn.flush().map_err(|e| e.to_string())?;
+    Ok(true)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{AGAIN_AFTER, ComeForward, FIRST_AFTER, KEEP_ASKING, Step};
+    use eframe::egui::{UserAttentionType, ViewportCommand as C};
+    use std::time::{Duration, Instant};
+
+    /// The first request waits until the taskbar menu has handed the focus back. The window asks
+    /// again when the focus is taken back right after it came, or never came, no more often than
+    /// every `AGAIN_AFTER` and only for `KEEP_ASKING`; a later switch away is the user's.
+    #[test]
+    fn the_window_asks_once_the_taskbar_menu_is_gone() {
+        let t0 = Instant::now();
+        let ms = |n: u64| Duration::from_millis(n);
+        let at = |n: u64| t0 + ms(n);
+        let (first, again, keep) = (FIRST_AFTER.as_millis() as u64, AGAIN_AFTER.as_millis() as u64, KEEP_ASKING.as_millis() as u64);
+        let mut f = ComeForward::default();
+        assert_eq!(f.step(t0, Some(false)), Step::Done, "not started");
+        f.start(t0);
+        assert_eq!(f.step(t0, Some(false)), Step::Wait(FIRST_AFTER), "the menu is still closing");
+        assert_eq!(f.step(at(5), Some(false)), Step::Wait(ms(first - 5)));
+        assert_eq!(f.step(at(first), Some(false)), Step::Ask);
+        assert_eq!(f.step(at(first + 3), Some(true)), Step::Wait(ms(keep - 3)), "raised");
+        // A slow menu takes the focus back 10 ms later: ask again, not before AGAIN_AFTER.
+        assert_eq!(f.step(at(first + 10), Some(false)), Step::Wait(ms(again - 10)));
+        assert_eq!(f.step(at(first + again), Some(false)), Step::Ask);
+        assert_eq!(f.step(at(first + again + 3), Some(true)), Step::Wait(ms(keep - again - 3)));
+        // The user clicks another app 200 ms later: the window stays behind.
+        assert_eq!(f.step(at(first + again + 200), Some(false)), Step::Done);
+        assert_eq!(f.step(at(first + again + 300), Some(false)), Step::Done);
+
+        // Never raised (the request was refused): ask again every AGAIN_AFTER, for KEEP_ASKING.
+        f.start(t0);
+        assert_eq!(f.step(at(first), None), Step::Ask, "unknown focus counts as out of focus");
+        assert_eq!(f.step(at(first + again), Some(false)), Step::Ask);
+        assert_eq!(f.step(at(first + keep), Some(false)), Step::Done);
+
+        // Back in the window before the first request: nothing to do.
+        f.start(t0);
+        assert_eq!(f.step(at(first), Some(true)), Step::Done);
+    }
+
+    /// Without the X11 request: focus, and the attention mark where focus is refused; a minimized
+    /// window is restored first.
+    #[test]
+    fn a_window_closed_from_the_background_comes_forward() {
+        let forward = [C::Focus, C::RequestUserAttention(UserAttentionType::Informational)];
+        assert_eq!(super::commands(Some(false), false), forward);
+        assert_eq!(super::commands(None, false), forward, "unknown counts as not minimized");
+        let minimized = super::commands(Some(true), false);
+        assert_eq!(minimized.first(), Some(&C::Minimized(false)));
+        assert_eq!(minimized.get(1..), Some(&forward[..]));
+        // The window manager took the X11 request: nothing left to mark.
+        assert_eq!(super::commands(Some(true), true), [C::Focus]);
+    }
+}
@@ -3,24 +3,30 @@

 use std::io::{BufRead, BufReader, Write};
 use std::net::{TcpListener, TcpStream};
-use std::sync::atomic::{AtomicUsize, Ordering};
+use std::sync::atomic::{AtomicBool, AtomicU64, AtomicUsize, Ordering};
 use std::sync::mpsc::{Receiver, Sender, TryRecvError, channel};
-use std::time::Duration;
+use std::sync::{Arc, Mutex, MutexGuard, PoisonError};
+use std::time::{Duration, Instant};

 use serde_json::{Value, json};
 use solidcraft_engine::MAX_LINE;
 use solidcraft_engine::control_auth;
+use solidcraft_engine::control_pending;
 use solidcraft_ui_egui::ControlRequest;
+use solidcraft_ui_egui::control::{DESIGN_WATCH, DesignWatch, Subscriber};

 /// Connections served at once, so a flood must not be able to spawn threads without end.
 const MAX_CONNECTIONS: usize = 16;
 /// Lines that are not JSON before the connection is closed, so garbage cannot loop forever.
 const MAX_BAD_LINES: usize = 8;
+/// How long a subscribed connection waits after a `design.changed` line before the next: what
+/// changes meanwhile (a parameter dragged) goes out as one line, the latest (#6985).
+const EVENT_GAP: Duration = Duration::from_millis(100);

 static OPEN: AtomicUsize = AtomicUsize::new(0);
-/// The token files this launch wrote (its `--control` port, the agent chat's endpoint), removed
-/// when the app ends.
-static TOKEN_FILES: std::sync::Mutex<Vec<std::path::PathBuf>> = std::sync::Mutex::new(Vec::new());
+/// The token files this launch wrote (its control port, the agent chat's endpoint) and the
+/// token in each, removed when the app ends unless another launch has written the file since.
+static TOKEN_FILES: std::sync::Mutex<Vec<(std::path::PathBuf, String)>> = std::sync::Mutex::new(Vec::new());

 /// A new random token: 32 bytes from the operating system, as hex.
 fn new_token() -> Option<String> {
@@ -29,21 +35,50 @@ fn new_token() -> Option<String> {
    Some(bytes.iter().map(|b| format!("{b:02x}")).collect())
 }

-/// Remove this launch's token file (at exit).
+/// Remove this launch's token files and discovery file (at exit), leaving any that another
+/// launch has written since (#8794).
 pub fn remove_token_file() {
    if let Ok(files) = TOKEN_FILES.lock() {
-        for p in files.iter() {
-            let _ = std::fs::remove_file(p);
+        for (path, token) in files.iter() {
+            control_auth::remove_token_file(path, token);
        }
    }
+    if let Some((port, token)) = APP_PORT.lock().ok().and_then(|p| p.clone()) {
+        control_auth::remove_current_port(port, &token);
+    }
 }

-pub fn start(port: u16, ctx: egui::Context) -> Receiver<ControlRequest> {
+/// The port the app's own channel listens on and its token, for removing the discovery file at exit.
+static APP_PORT: std::sync::Mutex<Option<(u16, String)>> = std::sync::Mutex::new(None);
+
+pub fn start(listen_on: control_auth::Listen, ctx: egui::Context) -> Receiver<ControlRequest> {
    let (tx, rx) = channel::<ControlRequest>();
    // Every connection must show the token before anything runs (docs/control-protocol.md).
    match control_auth::env_token().or_else(new_token) {
        Some(token) => {
-            listen(port, token, tx, ctx, false);
+            let listener = match listen_on {
+                control_auth::Listen::Exact(port) => TcpListener::bind(("127.0.0.1", port)),
+                control_auth::Listen::Default => control_auth::bind_with_fallback(control_auth::DEFAULT_PORT, control_auth::PORT_TRIES),
+            };
+            match listener {
+                Ok(l) => {
+                    if let Some(port) = listen_on_listener(l, token.clone(), tx, ctx, false) {
+                        if matches!(listen_on, control_auth::Listen::Default) {
+                            eprintln!("solidcraft: control channel on the default port 127.0.0.1:{port} (Preferences > Assistant turns it off)");
+                        }
+                        // The discovery file: where `solidcraft-cli mcp` finds this app with no arguments.
+                        match control_auth::write_current_port(port) {
+                            Ok(_) => {
+                                if let Ok(mut p) = APP_PORT.lock() {
+                                    *p = Some((port, token));
+                                }
+                            }
+                            Err(e) => eprintln!("solidcraft: could not write the control discovery file ({e})"),
+                        }
+                    }
+                }
+                Err(e) => eprintln!("solidcraft: control server failed to bind 127.0.0.1: {e}"),
+            }
        }
        None => eprintln!("solidcraft: control server not started: no random token available"),
    }
@@ -59,26 +94,26 @@ pub fn listen_agent(tx: Sender<ControlRequest>, ctx: egui::Context) -> Option<u1
        eprintln!("solidcraft: agent chat endpoint not started: no random token available");
        return None;
    };
-    listen(0, token, tx, ctx, true)
-}
-
-/// Listen on `port` (0: a free port the system picks) with `token`; the port it listens on.
-/// `patient`: every request may wait as long as a batch (a person decides on it).
-fn listen(port: u16, token: String, tx: Sender<ControlRequest>, ctx: egui::Context, patient: bool) -> Option<u16> {
-    let listener = match TcpListener::bind(("127.0.0.1", port)) {
+    let listener = match TcpListener::bind(("127.0.0.1", 0)) {
        Ok(l) => l,
        Err(e) => {
-            eprintln!("solidcraft: control server failed to bind 127.0.0.1:{port}: {e}");
+            eprintln!("solidcraft: control server failed to bind 127.0.0.1: {e}");
            return None;
        }
    };
-    let port = listener.local_addr().map(|a| a.port()).unwrap_or(port);
+    listen_on_listener(listener, token, tx, ctx, true)
+}
+
+/// Serve `listener` (loopback) with `token`; the port it listens on.
+/// `patient`: every request may wait as long as a batch (a person decides on it).
+fn listen_on_listener(listener: TcpListener, token: String, tx: Sender<ControlRequest>, ctx: egui::Context, patient: bool) -> Option<u16> {
+    let port = listener.local_addr().ok()?.port();
    match control_auth::token_path(port) {
        Some(path) => match control_auth::write_token_file(&path, &token) {
            Ok(()) => {
                eprintln!("solidcraft: control server listening on 127.0.0.1:{port} (token in {})", path.display());
                if let Ok(mut files) = TOKEN_FILES.lock() {
-                    files.push(path);
+                    files.push((path, token.clone()));
                }
            }
            Err(e) => eprintln!(
@@ -97,7 +132,7 @@ fn listen(port: u16, token: String, tx: Sender<ControlRequest>, ctx: egui::Conte
            if OPEN.fetch_add(1, Ordering::Relaxed) >= MAX_CONNECTIONS {
                OPEN.fetch_sub(1, Ordering::Relaxed);
                let mut refused = stream;
-                let _ = writeln!(refused, "{}", json!({"ok": false, "error": "too many connections"}));
+                let _ = send(&mut refused, &json!({"ok": false, "error": "too many connections"}));
                continue;
            }
            let tx = tx.clone();
@@ -144,6 +179,44 @@ fn read_line(r: &mut impl BufRead, max: usize) -> std::io::Result<Option<Vec<u8>
    }
 }

+/// A reply line, written to the socket at once. `writeln!` with a JSON value hands the socket each
+/// of its pieces apart, a system call for every string, number and comma: half a second for a
+/// design's component tree when it has thousands of components.
+fn send(out: &mut impl Write, reply: &Value) -> std::io::Result<()> {
+    let mut line = serde_json::to_vec(reply).map_err(std::io::Error::other)?;
+    line.push(b'\n');
+    out.write_all(&line)
+}
+
+/// The `"token"` of a request line that is a JSON object, read without building the rest of it.
+/// Until a connection shows the token, a line costs only its own bytes: parsed whole, a 16 MiB
+/// line of `[0,0,…]` is hundreds of MB, and 16 such connections could exhaust memory before any
+/// token was checked.
+fn token_of(line: &str) -> Option<String> {
+    struct Token;
+    impl<'de> serde::de::Visitor<'de> for Token {
+        type Value = Option<String>;
+        fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+            f.write_str("a request object")
+        }
+        fn visit_map<A: serde::de::MapAccess<'de>>(self, mut map: A) -> Result<Self::Value, A::Error> {
+            let mut token = None;
+            while let Some(key) = map.next_key::<String>()? {
+                if key == "token" {
+                    token = Some(map.next_value::<String>()?);
+                } else {
+                    map.next_value::<serde::de::IgnoredAny>()?;
+                }
+            }
+            Ok(token)
+        }
+    }
+    let mut de = serde_json::Deserializer::from_str(line);
+    let token = serde::Deserializer::deserialize_map(&mut de, Token).ok()?;
+    de.end().ok()?;
+    token
+}
+
 /// The reply to a connection that didn't show the token; the connection is then closed.
 fn unauthorized() -> Value {
    json!({"ok": false, "error": "unauthorized: send the control token as \"token\" (see docs/control-protocol.md)"})
@@ -154,7 +227,7 @@ fn unauthorized() -> Value {
 /// the connection, and a reset can reach the client before it has read the refusal.
 fn refuse(out: &mut TcpStream, reader: &mut BufReader<TcpStream>) {
    use std::io::Read;
-    let _ = writeln!(out, "{}", unauthorized());
+    let _ = send(out, &unauthorized());
    let _ = out.shutdown(std::net::Shutdown::Write);
    let _ = reader.get_ref().set_read_timeout(Some(Duration::from_millis(500)));
    let _ = std::io::copy(&mut reader.by_ref().take(64 * 1024), &mut std::io::sink());
@@ -175,54 +248,316 @@ const WAITS: Waits = Waits { short: Duration::from_secs(60), long: Duration::fro
 struct Pending {
    id: Value,
    method: String,
+    /// The request in messages ("`engine.execute` (solid.fillet)").
+    what: String,
    reply: Receiver<Value>,
 }

-fn serve(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: egui::Context, patient: bool) {
-    serve_with(stream, token, tx, ctx, patient, WAITS);
+/// Every request the app has been sent and not answered yet, from every connection, for
+/// `control.running` (#3654). Each connection's own thread answers that, so it never waits behind
+/// a running request.
+struct Running {
+    list: Mutex<Vec<InFlight>>,
+    connections: AtomicU64,
+    keys: AtomicU64,
 }

-fn serve_with(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: egui::Context, patient: bool, waits: Waits) {
+/// What `control.running` says about a request: never its parameters beyond the command id.
+struct InFlight {
+    key: u64,
+    connection: u64,
+    id: Value,
+    method: String,
+    command: Option<&'static str>,
+    steps: Option<usize>,
+    since: Instant,
+    started: Arc<AtomicBool>,
+}
+
+/// The app's requests, from both of its listeners.
+static RUNNING: Running = Running::new();
+
+impl Running {
+    const fn new() -> Self {
+        Running { list: Mutex::new(Vec::new()), connections: AtomicU64::new(0), keys: AtomicU64::new(0) }
+    }
+
+    fn lock(&self) -> MutexGuard<'_, Vec<InFlight>> {
+        self.list.lock().unwrap_or_else(PoisonError::into_inner)
+    }
+
+    /// List `req`, sent on `connection`, until the returned ticket is dropped.
+    fn add(&'static self, connection: u64, id: &Value, req: &ControlRequest) -> Ticket {
+        let key = self.keys.fetch_add(1, Ordering::Relaxed);
+        // Ids and methods come from the client: only short ones are repeated to the others.
+        let id = match id {
+            Value::Number(_) => id.clone(),
+            Value::String(s) if s.len() <= 64 => id.clone(),
+            _ => Value::Null,
+        };
+        let p = &req.params;
+        let command = match req.method.as_str() {
+            "engine.execute" | "command" => p.get("command").and_then(Value::as_str).and_then(solidcraft_engine::find_command).map(|c| c.id),
+            _ => None,
+        };
+        let steps = match req.method.as_str() {
+            "engine.batch" | "engine.script" => p.get("commands").and_then(Value::as_array).map(Vec::len),
+            _ => None,
+        };
+        let method = req.method.chars().take(64).collect();
+        let started = req.started.clone();
+        self.lock().push(InFlight { key, connection, id, method, command, steps, since: Instant::now(), started });
+        Ticket { running: self, key }
+    }
+
+    /// The `control.running` result, as `asker`'s connection sees it.
+    fn result(&self, asker: u64) -> Value {
+        let rows: Vec<Value> = self
+            .lock()
+            .iter()
+            .map(|e| {
+                let mut r = json!({
+                    "connection": e.connection,
+                    "id": e.id,
+                    "method": e.method,
+                    "running_s": (e.since.elapsed().as_secs_f64() * 10.0).round() / 10.0,
+                    "queued": !e.started.load(Ordering::Relaxed),
+                });
+                if let Some(c) = e.command {
+                    r["command"] = json!(c);
+                }
+                if let Some(n) = e.steps {
+                    r["steps"] = json!(n);
+                }
+                if e.connection == asker {
+                    r["self"] = json!(true);
+                }
+                r
+            })
+            .collect();
+        json!({"running": rows})
+    }
+}
+
+/// A listed request; dropped when its reply arrives.
+struct Ticket {
+    running: &'static Running,
+    key: u64,
+}
+
+impl Drop for Ticket {
+    fn drop(&mut self) {
+        let key = self.key;
+        self.running.lock().retain(|e| e.key != key);
+    }
+}
+
+/// The reply to a timed-out request, received on a thread of its own so the request stays listed
+/// until the app answers, also once its connection has closed (#3654).
+fn watch(reply: Receiver<Value>, ticket: Ticket) -> Receiver<Value> {
+    let (late_tx, late_rx) = channel();
+    // A small thread per timed-out request (each connection has at most one). If none can be
+    // made, the reply is lost and `control.pending` says the app ended the request without one.
+    // The reply is passed on before the request leaves the list: once `control.running` no longer
+    // shows it, its connection's `control.pending` has it.
+    let _ = std::thread::Builder::new().stack_size(64 * 1024).spawn(move || {
+        if let Ok(v) = reply.recv() {
+            let _ = late_tx.send(v);
+        }
+        drop(late_tx);
+        drop(ticket);
+    });
+    late_rx
+}
+
+/// The reply text for a request that outlasts its wait. A request that only reads changes
+/// nothing when it finishes; an export or a save still writes its file, and any other request
+/// still applies, as it was not cancelled.
+fn timeout_message(what: &str, effect: control_pending::Effect) -> String {
+    match effect {
+        control_pending::Effect::ReadsOnly => {
+            format!("timeout: {what} is still running in the app ({}); ask `control.pending` for its answer", effect.when_done())
+        }
+        control_pending::Effect::WritesFile => format!(
+            "timeout: {what} is still running in the app and will still write the file when it finishes (it was not cancelled: \
+             don't send it again; the design does not change); ask `control.pending` for its result"
+        ),
+        control_pending::Effect::Changes => format!(
+            "timeout: {what} is still running in the app and will still apply when it finishes (it was not cancelled: don't send it \
+             again); ask `control.pending` for its result"
+        ),
+    }
+}
+
+/// The reply text for a request refused because an earlier one on the connection still runs.
+fn busy_message(p: &Pending, method: &str) -> String {
+    let method: String = method.chars().take(128).collect();
+    format!(
+        "busy: request {} ({}) is still running, so `{method}` was not run; ask `control.pending` for that request's result, then \
+         send this one again",
+        p.id, p.what
+    )
+}
+
+/// A subscribed connection's socket, for its replies and its events: each line is written whole
+/// and alone, so an event never lands inside a reply (#6985).
+struct Lines {
+    socket: TcpStream,
+    turn: Mutex<()>,
+}
+
+impl Lines {
+    fn send(&self, line: &Value) -> std::io::Result<()> {
+        let _turn = self.turn.lock().unwrap_or_else(PoisonError::into_inner);
+        send(&mut &self.socket, line)
+    }
+}
+
+/// A connection's `control.subscribe` (#6985): its `design.changed` lines, sent from a thread of
+/// their own until the connection ends.
+struct Subscription {
+    lines: Arc<Lines>,
+    stop: Arc<AtomicBool>,
+}
+
+impl Subscription {
+    /// Write `reply`, the window's answer to `control.subscribe` naming the design `seen`, on
+    /// `out`, then send `design`'s changes after it: the reply goes out before any event. `None`,
+    /// with nothing written, when no thread or socket was left for the events.
+    fn start(
+        design: &'static DesignWatch,
+        counted: Subscriber,
+        out: &TcpStream,
+        seen: (String, u64),
+        reply: &Value,
+    ) -> Option<(Self, std::io::Result<()>)> {
+        let lines = Arc::new(Lines { socket: out.try_clone().ok()?, turn: Mutex::new(()) });
+        let stop = Arc::new(AtomicBool::new(false));
+        let first = lines.turn.lock().unwrap_or_else(PoisonError::into_inner);
+        let (l, s) = (lines.clone(), stop.clone());
+        // The connection's seat on the watch rides the events thread: it leaves when the thread
+        // does, so the next failed write to a closed client retires it even while the connection's
+        // own thread is slow to see the end of the stream (#7226).
+        std::thread::Builder::new().stack_size(64 * 1024).spawn(move || send_events(design, &l, &s, seen, counted)).ok()?;
+        let sent = send(&mut &lines.socket, reply);
+        drop(first);
+        Some((Subscription { lines, stop }, sent))
+    }
+}
+
+/// The design a `control.subscribe` reply names.
+fn design_of(reply: &Value) -> Option<(String, u64)> {
+    let result = reply.get("result")?;
+    Some((result.get("document_id")?.as_str()?.to_string(), result.get("revision")?.as_u64()?))
+}
+
+impl Drop for Subscription {
+    fn drop(&mut self) {
+        self.stop.store(true, Ordering::Relaxed);
+        // The socket closes now, not when the thread next looks; a line blocked on a client that
+        // stopped reading ends too.
+        let _ = self.lines.socket.shutdown(std::net::Shutdown::Both);
+    }
+}
+
+/// The `design.changed` lines of a subscribed connection, each time the design differs from the
+/// last one it was told of (`seen`), until `stop`. Owns the connection's seat on the watch
+/// (`counted`), so the seat leaves exactly when this thread does: on `stop`, or on the first
+/// write a closed client refuses (#7226).
+fn send_events(design: &DesignWatch, lines: &Lines, stop: &AtomicBool, mut seen: (String, u64), _counted: Subscriber) {
+    while !stop.load(Ordering::Relaxed) {
+        let Some(now) = design.wait(&seen, stop, Duration::from_secs(1)).filter(|now| *now != seen) else { continue };
+        if lines.send(&json!({"event": "design.changed", "params": {"document_id": now.0, "revision": now.1}})).is_err() {
+            break;
+        }
+        seen = now;
+        std::thread::sleep(EVENT_GAP);
+    }
+}
+
+/// What this app's control channel does beyond the methods every version has, for a client to
+/// find out before it relies on it (an older app answers `control.capabilities` with "unknown
+/// method"). `param_check`: the levels `engine.execute`, `engine.batch` and `engine.script` take
+/// as a request's own parameter check (#9184).
+fn capabilities() -> Value {
+    json!({"param_check": solidcraft_engine::schema::ParamCheck::ALL.map(|l| l.name())})
+}
+
+/// Write `reply` on the connection: through its subscription once it has one.
+fn answer(out: &mut TcpStream, events: Option<&Subscription>, reply: &Value) -> std::io::Result<()> {
+    match events {
+        Some(e) => e.lines.send(reply),
+        None => send(out, reply),
+    }
+}
+
+fn serve(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: egui::Context, patient: bool) {
+    serve_with(stream, token, tx, ctx, patient, WAITS, &RUNNING, &DESIGN_WATCH);
+}
+
+#[allow(clippy::too_many_arguments)]
+fn serve_with(
+    stream: TcpStream,
+    token: &str,
+    tx: Sender<ControlRequest>,
+    ctx: egui::Context,
+    patient: bool,
+    waits: Waits,
+    running: &'static Running,
+    design: &'static DesignWatch,
+) {
+    let connection = running.connections.fetch_add(1, Ordering::Relaxed) + 1;
    let Ok(read) = stream.try_clone() else { return };
    let mut out = stream;
    let mut reader = BufReader::new(read);
    let mut bad = 0usize;
    let mut authenticated = false;
    let mut pending: Option<Pending> = None;
+    let mut events: Option<Subscription> = None;
    loop {
+        // A first `control.subscribe` on its way to the window (#6985).
+        let mut joining = None;
        let line = match read_line(&mut reader, MAX_LINE) {
            Ok(Some(l)) => String::from_utf8_lossy(&l).into_owned(),
            Ok(None) => break,
            Err(e) => {
-                let _ = writeln!(out, "{}", json!({"ok": false, "error": e.to_string()}));
+                let _ = answer(&mut out, events.as_ref(), &json!({"ok": false, "error": e.to_string()}));
                break;
            }
        };
        if line.trim().is_empty() {
            continue;
        }
+        // The first request must carry the token; later ones on the same connection may.
+        if !authenticated {
+            match token_of(&line) {
+                Some(t) if control_auth::tokens_match(&t, token) => authenticated = true,
+                _ => {
+                    refuse(&mut out, &mut reader);
+                    break;
+                }
+            }
+        }
        let reply = match serde_json::from_str::<Value>(&line) {
            Ok(msg) => {
-                // The first request must carry the token; later ones on the same connection may.
-                if !authenticated {
-                    match msg.get("token").and_then(Value::as_str) {
-                        Some(t) if control_auth::tokens_match(t, token) => authenticated = true,
-                        _ => {
-                            refuse(&mut out, &mut reader);
-                            break;
-                        }
-                    }
-                }
                let id = msg.get("id").cloned().unwrap_or(Value::Null);
                let method = msg.get("method").and_then(Value::as_str).unwrap_or("").to_string();
                let params = msg.get("params").cloned().unwrap_or(json!({}));
-                // A request that timed out may have finished since (#1618).
-                let late = pending.as_ref().and_then(|p| match p.reply.try_recv() {
+                // A request that timed out may have finished since (#1618). `control.running` and
+                // `control.capabilities` only look, so they leave that reply where it is.
+                let late = pending.as_ref().filter(|_| !matches!(method.as_str(), "control.running" | "control.capabilities")).and_then(|p| match p
+                    .reply
+                    .try_recv()
+                {
                    Ok(reply) => Some(reply),
                    Err(TryRecvError::Disconnected) => Some(json!({"ok": false, "error": "the app ended the request without a reply"})),
                    Err(TryRecvError::Empty) => None,
                });
-                let mut r = if method == "control.pending" {
+                let mut r = if method == "control.running" {
+                    json!({"ok": true, "result": running.result(connection)})
+                } else if method == "control.capabilities" {
+                    json!({"ok": true, "result": capabilities()})
+                } else if method == "control.pending" {
                    match (pending.take(), late) {
                        (None, _) => json!({"ok": true, "result": {"pending": null}}),
                        (Some(p), Some(reply)) => json!({"ok": true, "result": {"pending": p.id, "method": p.method, "done": true, "reply": reply}}),
@@ -234,7 +569,15 @@ fn serve_with(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: e
                    }
                } else if let Some(p) = pending.as_ref().filter(|_| late.is_none()) {
                    // Nothing more is queued behind it, to run unseen when it ends.
-                    json!({"ok": false, "busy": true, "error": format!("busy: request {} (`{}`) is still running; ask `control.pending` for its result", p.id, p.method)})
+                    json!({"ok": false, "busy": true, "error": busy_message(p, &method)})
+                } else if method == "control.subscribe" && events.is_some() {
+                    if late.is_some() {
+                        // As below: finished, and the client moved on without asking.
+                        pending = None;
+                    }
+                    // Its events already say how the design moves; a second answer could only
+                    // arrive behind a newer one.
+                    json!({"ok": false, "error": "already subscribed: this connection is sent design.changed lines; ask document.revision for the design now"})
                } else {
                    if late.is_some() {
                        // Finished, and the client moved on without asking: it is dropped.
@@ -242,7 +585,13 @@ fn serve_with(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: e
                    }
                    // A batch replaces many short requests: the whole of it may take long (#743).
                    let wait = if patient || method == "engine.batch" { waits.long } else { waits.short };
+                    let what = control_pending::describe(&method, &params);
+                    let effect = control_pending::effect(&method, &params);
+                    // Counted before the window answers, so it publishes every change from its
+                    // answer on.
+                    joining = (method == "control.subscribe").then(|| design.join());
                    let (req, rrx) = ControlRequest::new(method.clone(), params);
+                    let ticket = running.add(connection, &id, &req);
                    if tx.send(req).is_err() {
                        break;
                    }
@@ -250,8 +599,8 @@ fn serve_with(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: e
                    match rrx.recv_timeout(wait) {
                        Ok(r) => r,
                        Err(_) => {
-                            let r = json!({"ok": false, "running": true, "error": format!("timeout: `{method}` is still running in the app and will still apply; ask `control.pending` for its result")});
-                            pending = Some(Pending { id: id.clone(), method, reply: rrx });
+                            let r = json!({"ok": false, "running": true, "error": timeout_message(&what, effect)});
+                            pending = Some(Pending { id: id.clone(), method, what, reply: watch(rrx, ticket) });
                            r
                        }
                    }
@@ -261,16 +610,25 @@ fn serve_with(stream: TcpStream, token: &str, tx: Sender<ControlRequest>, ctx: e
                }
                r
            }
-            Err(_) if !authenticated => {
-                refuse(&mut out, &mut reader);
-                break;
-            }
            Err(e) => {
                bad += 1;
                json!({"ok": false, "error": format!("bad JSON: {e}")})
            }
        };
-        if writeln!(out, "{reply}").is_err() {
+        // Subscribed once the window named the design (not when it refused or timed out).
+        let sent = match joining.and_then(|counted| design_of(&reply).map(|seen| (counted, seen))) {
+            Some((counted, seen)) => match Subscription::start(design, counted, &out, seen, &reply) {
+                Some((subscription, sent)) => {
+                    events = Some(subscription);
+                    sent
+                }
+                None => {
+                    send(&mut out, &json!({"id": reply.get("id"), "ok": false, "error": "not subscribed: no thread or socket left for the events"}))
+                }
+            },
+            None => answer(&mut out, events.as_ref(), &reply),
+        };
+        if sent.is_err() {
            break;
        }
        if bad >= MAX_BAD_LINES {
@@ -307,9 +665,10 @@ mod tests {
            }
        });
        let waits = Waits { short: Duration::from_millis(100), long: Duration::from_millis(100) };
+        static RUNNING: Running = Running::new();
        std::thread::spawn(move || {
            if let Some(stream) = listener.incoming().flatten().next() {
-                serve_with(stream, token, tx, egui::Context::default(), false, waits);
+                serve_with(stream, token, tx, egui::Context::default(), false, waits, &RUNNING, &DESIGN_WATCH);
            }
        });
        let s = TcpStream::connect(addr).unwrap();
@@ -349,6 +708,235 @@ mod tests {
        assert_eq!(*ran.lock().unwrap(), ["slow", "ui.view"], "the busy request never reached the app");
    }

+    /// #3654: `control.running` answers on every connection, at once, with what any connection
+    /// has the app running or queued (command ids, never parameters); a timed-out request stays
+    /// listed until the app answers it, and an idle app lists nothing.
+    #[test]
+    fn every_connection_sees_what_the_app_is_running() {
+        static RUNNING: Running = Running::new();
+        let token = "0123456789abcdef0123456789abcdef";
+        let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+        let addr = listener.local_addr().unwrap();
+        let (tx, rx) = channel::<ControlRequest>();
+        // The window: one request at a time, as `drain_control` takes them; the export is held
+        // until the test lets it go.
+        let (gate_tx, gate_rx) = channel::<()>();
+        std::thread::spawn(move || {
+            for req in rx {
+                req.started.store(true, Ordering::Relaxed);
+                if req.method == "engine.execute" {
+                    let _ = gate_rx.recv();
+                }
+                let _ = req.reply.send(json!({"ok": true, "result": req.method}));
+            }
+        });
+        let waits = Waits { short: Duration::from_millis(100), long: Duration::from_secs(60) };
+        std::thread::spawn(move || {
+            for stream in listener.incoming().flatten() {
+                let tx = tx.clone();
+                std::thread::spawn(move || serve_with(stream, token, tx, egui::Context::default(), false, waits, &RUNNING, &DESIGN_WATCH));
+            }
+        });
+        let open = || {
+            let s = TcpStream::connect(addr).unwrap();
+            s.set_read_timeout(Some(Duration::from_secs(10))).unwrap();
+            let mut out = s.try_clone().unwrap();
+            let mut lines = BufReader::new(s);
+            move |v: Value| -> Value {
+                writeln!(out, "{v}").unwrap();
+                let mut l = String::new();
+                lines.read_line(&mut l).unwrap();
+                serde_json::from_str(&l).unwrap()
+            }
+        };
+        let running = |ask: &mut dyn FnMut(Value) -> Value, until: &dyn Fn(&[Value]) -> bool| {
+            let deadline = Instant::now() + Duration::from_secs(10);
+            loop {
+                let r = ask(json!({"id": 0, "method": "control.running", "token": token}));
+                let rows = r["result"]["running"].as_array().cloned().unwrap_or_default();
+                if until(&rows) || Instant::now() > deadline {
+                    return (r, rows);
+                }
+                std::thread::sleep(Duration::from_millis(10));
+            }
+        };
+        let mut watcher = open();
+        let (r, rows) = running(&mut watcher, &|_| true);
+        assert!(r["ok"] == true && rows.is_empty(), "idle: {r}");
+        // What the app's control channel does beyond the methods every version has (#9184).
+        let r = watcher(json!({"id": 0, "method": "control.capabilities", "token": token}));
+        assert_eq!((&r["ok"], &r["result"]["param_check"]), (&json!(true), &json!(["off", "warn", "strict"])), "{r}");
+
+        let mut export = open();
+        let path = "/private/part.step";
+        let params = json!({"command": "file.export", "params": {"path": path}});
+        let r = export(json!({"id": 7, "method": "engine.execute", "params": params, "token": token}));
+        assert_eq!(r["running"], true, "{r}");
+        // A batch from another connection waits behind the export.
+        let mut batch = open();
+        let queued = std::thread::spawn(move || {
+            let steps = json!([{"command": "solid.box"}, {"command": "solid.box"}]);
+            batch(json!({"id": "b", "method": "engine.batch", "params": {"commands": steps}, "token": token}))
+        });
+        // The window may not have taken the export yet, even though it timed out.
+        let (r, rows) = running(&mut watcher, &|rows| rows.len() == 2 && rows[0]["queued"] == false);
+        assert_eq!(rows.len(), 2, "{r}");
+        let (e, b) = (&rows[0], &rows[1]);
+        assert_eq!(
+            (&e["id"], &e["method"], &e["command"], &e["queued"]),
+            (&json!(7), &json!("engine.execute"), &json!("file.export"), &json!(false)),
+            "{r}"
+        );
+        assert!(e["running_s"].as_f64().is_some_and(|s| s >= 0.1), "{r}");
+        assert_eq!((&b["id"], &b["method"], &b["steps"], &b["queued"]), (&json!("b"), &json!("engine.batch"), &json!(2), &json!(true)), "{r}");
+        assert_ne!(e["connection"], b["connection"], "{r}");
+        assert!(rows.iter().all(|row| row.get("self").is_none()), "{r}");
+        assert!(!r.to_string().contains(path), "parameters stay with their connection: {r}");
+        // The connection whose request timed out may ask too, and sees its own marked.
+        let r = export(json!({"id": 8, "method": "control.running"}));
+        let own: Vec<&Value> = r["result"]["running"].as_array().unwrap().iter().filter(|row| row["self"] == true).collect();
+        assert_eq!(own.len(), 1, "{r}");
+        assert_eq!(own[0]["command"], "file.export", "{r}");
+        // So may it ask what the app can do: answered at once, not refused as busy.
+        let r = export(json!({"id": 8, "method": "control.capabilities"}));
+        assert_eq!(r["result"]["param_check"], json!(["off", "warn", "strict"]), "{r}");
+
+        gate_tx.send(()).unwrap();
+        assert_eq!(queued.join().unwrap()["result"], "engine.batch");
+        let (r, rows) = running(&mut watcher, &|rows| rows.is_empty());
+        assert!(rows.is_empty(), "done: {r}");
+        // Asking `control.running` did not take the export's reply from its connection.
+        let r = export(json!({"id": 9, "method": "control.pending"}));
+        assert_eq!((&r["result"]["pending"], &r["result"]["done"]), (&json!(7), &json!(true)), "{r}");
+    }
+
+    /// #6985: a connection that sends `control.subscribe` gets the design in the reply, then a
+    /// `design.changed` line each time the window publishes another: never before the reply,
+    /// none for the same design, the latest after a burst, each line whole between its replies.
+    /// A second subscribe is refused without reaching the window. A connection that did not
+    /// subscribe gets no events, and one that closed is no longer counted.
+    #[test]
+    fn subscribed_connections_are_told_of_design_changes() {
+        static RUNNING: Running = Running::new();
+        static WATCH: DesignWatch = DesignWatch::new();
+        let token = "0123456789abcdef0123456789abcdef";
+        let listener = TcpListener::bind("127.0.0.1:0").unwrap();
+        let addr = listener.local_addr().unwrap();
+        let (tx, rx) = channel::<ControlRequest>();
+        // The window: it answers `control.subscribe` as the app does, publishing the design first;
+        // then the design changes at once, before the reply may have been written.
+        std::thread::spawn(move || {
+            for req in rx {
+                if req.method == "control.subscribe" {
+                    WATCH.publish("d-1", 3);
+                    let _ = req.reply.send(json!({"ok": true, "result": {"document_id": "d-1", "revision": 3}}));
+                    WATCH.publish("d-1", 4);
+                } else {
+                    let _ = req.reply.send(json!({"ok": true, "result": req.method}));
+                }
+            }
+        });
+        std::thread::spawn(move || {
+            for stream in listener.incoming().flatten() {
+                let tx = tx.clone();
+                std::thread::spawn(move || serve_with(stream, token, tx, egui::Context::default(), false, WAITS, &RUNNING, &WATCH));
+            }
+        });
+        let open = || {
+            let s = TcpStream::connect(addr).unwrap();
+            s.set_read_timeout(Some(Duration::from_secs(10))).unwrap();
+            (s.try_clone().unwrap(), BufReader::new(s))
+        };
+        let next = |lines: &mut BufReader<TcpStream>| -> Value {
+            let mut l = String::new();
+            lines.read_line(&mut l).unwrap();
+            serde_json::from_str(&l).unwrap()
+        };
+        let changed = |id: &str, revision: u64| json!({"event": "design.changed", "params": {"document_id": id, "revision": revision}});
+
+        let (mut quiet_out, mut quiet) = open();
+        writeln!(quiet_out, "{}", json!({"id": 1, "method": "ui.view", "token": token})).unwrap();
+        assert_eq!(next(&mut quiet)["id"], 1);
+
+        let (mut out, mut lines) = open();
+        writeln!(out, "{}", json!({"id": 1, "method": "control.subscribe", "token": token})).unwrap();
+        assert_eq!(next(&mut lines), json!({"id": 1, "ok": true, "result": {"document_id": "d-1", "revision": 3}}));
+        assert_eq!(next(&mut lines), changed("d-1", 4), "the change after the window's answer comes after the reply");
+        assert!(WATCH.subscribed());
+        // The design it was told of is no news; another revision is.
+        WATCH.publish("d-1", 4);
+        WATCH.publish("d-1", 5);
+        assert_eq!(next(&mut lines), changed("d-1", 5));
+        // A burst ends with its latest.
+        for revision in 6..=10 {
+            WATCH.publish("d-1", revision);
+        }
+        let mut last = 5;
+        while last < 10 {
+            let e = next(&mut lines);
+            let revision = e["params"]["revision"].as_u64().unwrap();
+            assert!(e["event"] == "design.changed" && revision > last, "{e} after {last}");
+            last = revision;
+        }
+        // Another tab: another id, whatever its revision.
+        WATCH.publish("d-2", 2);
+        assert_eq!(next(&mut lines), changed("d-2", 2));
+        // Subscribed already: refused here (the window would have published d-1 again).
+        writeln!(out, "{}", json!({"id": 2, "method": "control.subscribe"})).unwrap();
+        let r = next(&mut lines);
+        assert!(r["id"] == 2 && r["ok"] == false && r["error"].as_str().is_some_and(|e| e.starts_with("already subscribed")), "{r}");
+        // Replies still come, whole, and nothing else was sent meanwhile.
+        writeln!(out, "{}", json!({"id": 3, "method": "ui.view"})).unwrap();
+        assert_eq!(next(&mut lines), json!({"id": 3, "ok": true, "result": "ui.view"}));
+        writeln!(quiet_out, "{}", json!({"id": 2, "method": "ui.view"})).unwrap();
+        assert_eq!(next(&mut quiet), json!({"id": 2, "ok": true, "result": "ui.view"}), "no events without subscribing");
+        // Closed, it is no longer counted. Each publish asks the events thread for one more line,
+        // and its write to the closed connection is what retires the seat; that keeps the wait off
+        // the connection's own thread, which anything else this process is doing may hold up past
+        // the deadline (#7226).
+        drop((out, lines));
+        let mut revision = 11;
+        let deadline = Instant::now() + Duration::from_secs(10);
+        while WATCH.subscribed() && Instant::now() < deadline {
+            WATCH.publish("d-1", revision);
+            revision += 1;
+            std::thread::sleep(Duration::from_millis(20));
+        }
+        assert!(!WATCH.subscribed());
+    }
+
+    /// A timed-out request that only reads is not said to "still apply", nor is one that only
+    /// writes a file (an export, #1989); a change is, by name.
+    #[test]
+    fn timeout_text_tells_reads_from_changes() {
+        let says = |method: &str, p: Value| timeout_message(&control_pending::describe(method, &p), control_pending::effect(method, &p));
+        let read = says("ui.inspect", json!({}));
+        assert!(read.starts_with("timeout") && read.contains("only reads") && !read.contains("will still apply"), "{read}");
+        let read = says("engine.execute", json!({"command": "sketch.inspect"}));
+        assert!(read.contains("only reads") && read.contains("sketch.inspect"), "{read}");
+        let change = says("engine.execute", json!({"command": "solid.fillet"}));
+        assert!(change.starts_with("timeout") && change.contains("will still apply") && change.contains("solid.fillet"), "{change}");
+        let export = says("engine.execute", json!({"command": "file.export", "params": {"path": "/tmp/wall.step"}}));
+        assert!(export.contains("will still write the file") && !export.contains("apply") && export.contains("file.export"), "{export}");
+        let save = says("engine.execute", json!({"command": "file.save"}));
+        assert!(save.contains("will still write the file") && !save.contains("apply"), "{save}");
+        let render = says("ui.render", json!({"path": "/tmp/a.png"}));
+        assert!(render.contains("will still write the file"), "{render}");
+    }
+
+    /// The token is read from a request object without building the rest of it: other fields,
+    /// however large or nested, are only skipped. Anything but an object with a string token is
+    /// no token.
+    #[test]
+    fn token_is_read_without_parsing_the_request() {
+        assert_eq!(token_of(r#"{"id":1,"token":"abc","params":{"a":[1,[2,{"b":null}]]}}"#).as_deref(), Some("abc"));
+        let flood = format!(r#"{{"params":[{}0],"token":"t"}}"#, "0,".repeat(1 << 20));
+        assert_eq!(token_of(&flood).as_deref(), Some("t"));
+        for no in [r#"["abc"]"#, r#"{"token":5}"#, r#"{"token":"a"} x"#, r#"{"id":1}"#, "GET / HTTP/1.1", r#""token""#] {
+            assert_eq!(token_of(no), None, "{no}");
+        }
+    }
+
    /// #205: a connection runs nothing until a request carries the launch's token; a wrong or
    /// missing token, or garbage, is refused and the connection closed. Once shown, the token
    /// need not be repeated on that connection.
@@ -441,4 +1029,31 @@ mod tests {
        let mut r = BufReader::with_capacity(64, text.as_slice());
        assert!(read_line(&mut r, 1000).is_err());
    }
+
+    /// A large reply reaches the socket in one write, not one per JSON piece (a component tree of
+    /// thousands of components took half a second to send), and reads back as it was.
+    #[test]
+    fn a_large_reply_is_written_at_once() {
+        struct Counted {
+            writes: usize,
+            bytes: Vec<u8>,
+        }
+        impl Write for Counted {
+            fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
+                self.writes += 1;
+                self.bytes.extend_from_slice(buf);
+                Ok(buf.len())
+            }
+            fn flush(&mut self) -> std::io::Result<()> {
+                Ok(())
+            }
+        }
+        let components: Vec<Value> = (0..2000).map(|i| json!({"id": i, "name": format!("Part {i}"), "bodies": ["a", "b"], "parent": 0})).collect();
+        let reply = json!({"ok": true, "id": 7, "result": {"components": components}});
+        let mut out = Counted { writes: 0, bytes: Vec::new() };
+        send(&mut out, &reply).unwrap();
+        assert_eq!(out.writes, 1);
+        assert_eq!(out.bytes.last(), Some(&b'\n'));
+        assert_eq!(serde_json::from_slice::<Value>(&out.bytes).unwrap(), reply);
+    }
 }
@@ -0,0 +1,91 @@
+//! The graphics device was lost after the window opened: the driver was reset (on Windows a TDR,
+//! "Display driver stopped responding and has recovered") or the GPU went away (#4172). A lost
+//! device can't draw again, so the window can't show anything more, not even a message. The
+//! painter stops drawing (`egui_wgpu::DeviceLost`); the app then closes, keeping unsaved changes
+//! for recovery as a forced quit does, and starts again ([`restart`]), and the new start says what
+//! happened ([`note`]). A device lost again soon after such a restart starts the next one on the
+//! software renderer, which doesn't depend on the graphics driver.
+
+use crate::startup;
+
+/// Set on the start after a lost device: when the device was lost (seconds since 1970).
+pub const LOST_ENV: &str = "SOLIDCRAFT_DEVICE_LOST";
+
+/// A loss this recent (seconds) counts for the start after it: its note, and a second loss
+/// within it starts on the software renderer. Inherited by later starts, an older stamp is
+/// ignored.
+const RECENT_SECS: u64 = 600;
+
+/// Seconds since 1970.
+pub fn now_secs() -> u64 {
+    std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).map_or(0, |d| d.as_secs())
+}
+
+/// Whether `stamp` ([`LOST_ENV`]) names a loss at most [`RECENT_SECS`] before `now`.
+pub fn recent(stamp: Option<&str>, now: u64) -> bool {
+    stamp.and_then(|s| s.trim().parse::<u64>().ok()).is_some_and(|at| at <= now && now - at <= RECENT_SECS)
+}
+
+/// Whether the start after a lost device uses the software renderer: when this launch already
+/// followed a recent loss (the driver keeps losing it), or ran on it anyway.
+pub fn restart_on_software(after_recent_loss: bool, cpu_renderer: bool) -> bool {
+    after_recent_loss || cpu_renderer
+}
+
+/// What the start after a lost device tells the user, `software` when it runs on the software
+/// renderer.
+pub fn note(software: bool) -> String {
+    let mut note = String::from(
+        "The graphics device was reset (the graphics driver stopped responding), so SolidCraft closed and started again. Unsaved changes were kept for recovery.",
+    );
+    if software {
+        note.push_str(" This start uses software rendering, which doesn't depend on the graphics driver.");
+    }
+    note
+}
+
+/// Start SolidCraft again with the same arguments, the loss stamped at `lost_at`, on the software
+/// renderer when `software`.
+pub fn restart(software: bool, lost_at: u64) {
+    let Ok(exe) = std::env::current_exe() else { return };
+    let mut command = std::process::Command::new(exe);
+    command.args(std::env::args_os().skip(1)).env(LOST_ENV, lost_at.to_string());
+    if software {
+        command.env(startup::RENDERER_ENV, "cpu");
+    }
+    #[cfg(windows)]
+    {
+        use std::os::windows::process::CommandExt;
+        // Not tied to this process: its own process group, no console.
+        command.creation_flags(0x0000_0200 | 0x0000_0008);
+    }
+    if let Err(e) = command.spawn() {
+        log::error!("graphics: starting again after the device was lost: {e}");
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    /// Only a recent, well-formed stamp counts: a later start that inherited it says nothing.
+    #[test]
+    fn only_a_recent_loss_counts() {
+        let now = 1_000_000;
+        assert!(super::recent(Some("999990"), now));
+        assert!(super::recent(Some(" 999400 "), now));
+        assert!(!super::recent(Some("999399"), now), "older than ten minutes");
+        assert!(!super::recent(Some("1000001"), now), "from the future");
+        assert!(!super::recent(Some("soon"), now));
+        assert!(!super::recent(None, now));
+    }
+
+    /// The first loss starts again on the GPU; a second one soon after, on the software renderer.
+    #[test]
+    fn a_second_loss_in_a_row_starts_on_the_software_renderer() {
+        assert!(!super::restart_on_software(false, false));
+        assert!(super::restart_on_software(true, false));
+        assert!(super::restart_on_software(false, true));
+        assert!(super::note(true).contains("software rendering"));
+        assert!(!super::note(false).contains("software rendering"));
+        assert!(super::note(false).contains("kept for recovery"));
+    }
+}
@@ -0,0 +1,879 @@
+//! macOS: what a crash in native code leaves behind (docs/crash-reports.md).
+//!
+//! A crash inside a graphics driver or another library (a segfault, an `abort()`, a stack
+//! overflow) is no Rust panic: the panic hook never runs and the next start only found "an
+//! unclean exit". A signal handler for SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP (how a trap
+//! instruction arrives on Apple silicon) and SIGABRT now writes, before the process goes, the
+//! same small JSON file as the Windows filter (`native_crash.rs`): the signal, the faulting
+//! module and the offset into it, and a short frame-pointer walk, next to the run's crash journal
+//! (`solidcraft_engine::crash::native_paths`). The next start puts it into the unclean exit's
+//! report. The signal then goes on to the handler that was there before (the standard library's
+//! stack overflow message) or to the default action, so the process still dies of it and macOS
+//! still writes its own crash report (`~/Library/Logs/DiagnosticReports`; the file names the
+//! `pid` the JSON records).
+//!
+//! Installing a signal handler and asking dyld which image holds an address have no safe API,
+//! hence the `unsafe_code` allowance on this module (the app crate denies it). The handler runs
+//! on a thread that may have a broken heap, or on the small alternate stack after a stack
+//! overflow: it doesn't allocate, formats into a buffer on the stack, and only reads memory on
+//! the thread's own stack. It writes what it knows from the signal first and only then calls
+//! `dladdr` (not on POSIX's async-signal-safe list; it takes dyld's recursive reader lock and
+//! doesn't allocate) to name the modules, rewriting the file, so a hang or a fault in there
+//! still leaves a record.
+#![allow(unsafe_code)]
+
+use std::ffi::{CStr, CString, c_int, c_void};
+use std::fmt::Write as _;
+use std::os::unix::ffi::OsStrExt;
+use std::sync::OnceLock;
+use std::sync::atomic::{AtomicBool, AtomicI32, AtomicUsize, Ordering};
+
+use libc::{SIGABRT, SIGBUS, SIGFPE, SIGILL, SIGSEGV, SIGTRAP, siginfo_t};
+
+/// The signals a crash arrives as, in the order of [`PREVIOUS`].
+const SIGNALS: [c_int; 6] = [SIGSEGV, SIGBUS, SIGILL, SIGFPE, SIGTRAP, SIGABRT];
+/// Frames the walk records (the faulting instruction first).
+const MAX_FRAMES: usize = 24;
+/// A fault this far below a thread's stack is taken for a stack overflow.
+const GUARD: usize = 64 << 10;
+
+/// Where the handler writes (NUL-terminated), set once by [`install`].
+static PATH: OnceLock<CString> = OnceLock::new();
+/// The handler that was installed before ours for each of [`SIGNALS`] (called after ours), as an
+/// address (`SIG_DFL` is 0, `SIG_IGN` 1), and its `sa_flags`.
+static PREVIOUS: [AtomicUsize; 6] = [const { AtomicUsize::new(libc::SIG_DFL) }; 6];
+static PREVIOUS_FLAGS: [AtomicI32; 6] = [const { AtomicI32::new(0) }; 6];
+/// The handler has started writing (a second signal while it does is only passed on).
+static BUSY: AtomicBool = AtomicBool::new(false);
+
+/// Catch native crashes from now on (after `solidcraft_engine::crash::install`; nothing without it).
+pub fn install() {
+    let Some((info, _)) = solidcraft_engine::crash::native_paths() else { return };
+    let Ok(path) = CString::new(info.as_os_str().as_bytes()) else { return };
+    if PATH.set(path).is_err() {
+        return;
+    }
+    for (slot, &signal) in SIGNALS.iter().enumerate() {
+        // SAFETY: `sigaction` is plain data; all zeros is a valid (empty) value.
+        let mut ours: libc::sigaction = unsafe { std::mem::zeroed() };
+        ours.sa_sigaction = handler as *const () as usize;
+        // On the alternate stack the standard library gives each of its threads, so that a stack
+        // overflow can still be recorded.
+        ours.sa_flags = libc::SA_SIGINFO | libc::SA_ONSTACK;
+        // SAFETY: as above.
+        let mut old: libc::sigaction = unsafe { std::mem::zeroed() };
+        // SAFETY: `handler` has the signature SA_SIGINFO calls it with and stays valid for the
+        // process's life; both structs are valid for the call.
+        if unsafe { libc::sigaction(signal, &ours, &mut old) } == 0
+            && old.sa_sigaction != ours.sa_sigaction
+            && let (Some(p), Some(f)) = (PREVIOUS.get(slot), PREVIOUS_FLAGS.get(slot))
+        {
+            f.store(old.sa_flags, Ordering::SeqCst);
+            p.store(old.sa_sigaction, Ordering::SeqCst);
+        }
+    }
+}
+
+/// The signal handler: record, then pass the signal on.
+unsafe extern "C" fn handler(signal: c_int, info: *mut siginfo_t, context: *mut c_void) {
+    // SAFETY: `__error` is this thread's errno, restored for whatever runs after us.
+    let errno = unsafe { *libc::__error() };
+    let slot = SIGNALS.iter().position(|&s| s == signal).unwrap_or(0);
+    let previous = PREVIOUS.get(slot).map_or(libc::SIG_DFL, |p| p.load(Ordering::SeqCst));
+    // SAFETY: the system passes a valid siginfo and the interrupted thread's context for the
+    // duration of an SA_SIGINFO handler.
+    let f = unsafe { fault(signal, info, context) };
+    // Someone sent a signal the app ignored before: still nothing to record.
+    let ignored = previous == libc::SIG_IGN && !f.fault;
+    if !ignored && !BUSY.swap(true, Ordering::SeqCst) {
+        record(&f);
+    }
+    // SAFETY: as above.
+    unsafe { pass_on(signal, slot, previous, f.fault, info, context) };
+    // SAFETY: as above.
+    unsafe { *libc::__error() = errno };
+}
+
+/// The signal comes from the faulting instruction itself (not `kill`, `raise` or `abort`), so
+/// returning runs it again: on arm64, the exception the thread last took matches the signal.
+/// macOS gives a SIGSEGV sent with `kill` the same `si_code` as a real one (SEGV_ACCERR), but
+/// the exception is then the thread's last system call (or something long past, whose fault
+/// address doesn't match).
+#[cfg(any(target_arch = "aarch64", test))]
+fn arm64_fault(signal: c_int, si_code: c_int, addr: usize, esr: u32, far: u64) -> bool {
+    const ABORTS: [u32; 4] = [0x20, 0x21, 0x24, 0x25];
+    const SVC: u32 = 0x15;
+    let class = esr >> 26;
+    signal != SIGABRT
+        && (1..0x10000).contains(&si_code)
+        && match signal {
+            SIGSEGV | SIGBUS => ABORTS.contains(&class) && far as usize == addr,
+            _ => class != SVC && !ABORTS.contains(&class),
+        }
+}
+
+/// As [`arm64_fault`], from the x86 trap number and page-fault address.
+#[cfg(any(target_arch = "x86_64", test))]
+fn x86_fault(signal: c_int, si_code: c_int, addr: usize, trapno: u16, faultvaddr: u64) -> bool {
+    signal != SIGABRT
+        && (1..0x10000).contains(&si_code)
+        && match signal {
+            SIGSEGV | SIGBUS => (trapno == 14 && faultvaddr as usize == addr) || matches!(trapno, 12 | 13),
+            SIGILL => trapno == 6,
+            SIGFPE => matches!(trapno, 0 | 16 | 19),
+            SIGTRAP => matches!(trapno, 1 | 3),
+            _ => false,
+        }
+}
+
+/// Hand the signal to the previous handler, or to the default action. A crash signal that was
+/// only sent goes to the default action: the handler before ours (the standard library's, for
+/// SIGSEGV and SIGBUS) expects a fault that happens again when it returns.
+unsafe fn pass_on(signal: c_int, slot: usize, previous: usize, fault: bool, info: *mut siginfo_t, context: *mut c_void) {
+    let ours = handler as *const () as usize;
+    if previous != libc::SIG_DFL && previous != libc::SIG_IGN && previous != ours && (fault || signal == SIGABRT) {
+        let flags = PREVIOUS_FLAGS.get(slot).map_or(0, |f| f.load(Ordering::SeqCst));
+        if flags & libc::SA_SIGINFO != 0 {
+            // SAFETY: the address came from `sigaction` as an SA_SIGINFO handler.
+            let previous: unsafe extern "C" fn(c_int, *mut siginfo_t, *mut c_void) = unsafe { std::mem::transmute(previous) };
+            // SAFETY: as for this handler.
+            unsafe { previous(signal, info, context) };
+        } else {
+            // SAFETY: the address came from `sigaction` as a plain handler.
+            let previous: unsafe extern "C" fn(c_int) = unsafe { std::mem::transmute(previous) };
+            // SAFETY: as for this handler.
+            unsafe { previous(signal) };
+        }
+        return;
+    }
+    if previous == libc::SIG_IGN && !fault {
+        return;
+    }
+    // SAFETY: as in `install`.
+    let mut default: libc::sigaction = unsafe { std::mem::zeroed() };
+    default.sa_sigaction = libc::SIG_DFL;
+    // SAFETY: a valid struct; restoring the default action is async-signal-safe.
+    unsafe { libc::sigaction(signal, &default, std::ptr::null_mut()) };
+    // A fault happens again when we return, now with the default action, so macOS reports it at
+    // the instruction; anything else is raised again, and arrives once this handler returns.
+    if !fault {
+        // SAFETY: async-signal-safe.
+        unsafe { libc::raise(signal) };
+    }
+}
+
+/// The darwin `ucontext_t`, up to the pointer to the machine context (`<sys/_types/_ucontext.h>`).
+#[repr(C)]
+struct UContext {
+    _onstack: c_int,
+    _sigmask: u32,
+    _stack: libc::stack_t,
+    _link: *mut c_void,
+    _mcsize: usize,
+    mcontext: *const MContext,
+}
+
+/// The darwin arm64 machine context: exception state, then the general registers
+/// (`<mach/arm/_structs.h>`; the floating-point state that follows isn't read).
+#[cfg(target_arch = "aarch64")]
+#[repr(C)]
+struct MContext {
+    far: u64,
+    esr: u32,
+    _exception: u32,
+    _x: [u64; 29],
+    fp: u64,
+    _lr: u64,
+    _sp: u64,
+    pc: u64,
+}
+
+/// The darwin x86_64 machine context: exception state, then the general registers
+/// (`<mach/i386/_structs.h>`; rax rbx rcx rdx rdi rsi rbp rsp r8–r15, then rip).
+#[cfg(target_arch = "x86_64")]
+#[repr(C)]
+struct MContext {
+    trapno: u16,
+    _cpu: u16,
+    err: u32,
+    faultvaddr: u64,
+    gpr: [u64; 16],
+    rip: u64,
+}
+
+/// What the faulting instruction did to its address, when the processor says.
+#[derive(Clone, Copy, Debug, PartialEq)]
+enum Access {
+    Unknown,
+    Read,
+    Write,
+    Execute,
+}
+
+/// What a crash signal says, read out of the signal before anything is looked up.
+#[derive(Clone, Copy, Debug)]
+struct Fault {
+    signal: c_int,
+    si_code: c_int,
+    /// `si_addr`: the address that faulted (for SIGILL, SIGFPE and SIGTRAP, the instruction).
+    addr: usize,
+    pc: usize,
+    fp: usize,
+    access: Access,
+    /// It comes from the faulting instruction (not `kill`, `raise` or `abort`).
+    fault: bool,
+    /// The process that sent the signal (0 or our own for a fault or an `abort()`).
+    sender: i32,
+    pid: i32,
+    thread: u64,
+    thread_name: [u8; 64],
+    /// The thread's stack, `[low, high)` (0, 0 when unknown).
+    stack: (usize, usize),
+}
+
+impl Fault {
+    /// The fault hit just below the thread's stack: the stack ran out.
+    fn overflow(&self) -> bool {
+        let (low, high) = self.stack;
+        matches!(self.signal, SIGSEGV | SIGBUS) && high > low && self.addr < low.saturating_add(4096) && self.addr >= low.saturating_sub(GUARD)
+    }
+
+    fn signal_name(&self) -> &'static str {
+        match self.signal {
+            SIGSEGV => "SIGSEGV",
+            SIGBUS => "SIGBUS",
+            SIGILL => "SIGILL",
+            SIGFPE => "SIGFPE",
+            SIGTRAP => "SIGTRAP",
+            SIGABRT => "SIGABRT",
+            _ => "signal",
+        }
+    }
+
+    fn name(&self) -> &'static str {
+        if self.overflow() {
+            return "stack overflow";
+        }
+        match self.signal {
+            SIGSEGV => "segmentation fault",
+            SIGBUS => "bus error",
+            SIGILL => "illegal instruction",
+            SIGFPE => "arithmetic exception",
+            SIGTRAP => "trap",
+            SIGABRT => "abort",
+            _ => "signal",
+        }
+    }
+
+    /// The `si_code` names that say something about a crash.
+    fn code_name(&self) -> Option<&'static str> {
+        Some(match (self.signal, self.si_code) {
+            (SIGSEGV, 1) => "SEGV_MAPERR",
+            (SIGSEGV, 2) => "SEGV_ACCERR",
+            (SIGBUS, 1) => "BUS_ADRALN",
+            (SIGBUS, 2) => "BUS_ADRERR",
+            (SIGBUS, 3) => "BUS_OBJERR",
+            (SIGFPE, 7) => "FPE_INTDIV",
+            (SIGFPE, 8) => "FPE_INTOVF",
+            _ => return None,
+        })
+    }
+
+    /// One line on what happened: the address read or written, a stack overflow, who sent it.
+    fn detail(&self, b: &mut Buf) {
+        if self.sender != 0 && self.sender != self.pid {
+            let _ = write!(b, "sent by process {}", self.sender);
+            return;
+        }
+        if !self.fault {
+            if self.signal != SIGABRT {
+                let _ = b.write_str("sent with kill or raise, not a fault");
+            }
+            return;
+        }
+        let what = match self.access {
+            Access::Read => "read of",
+            Access::Write => "write to",
+            Access::Execute => "execution at",
+            Access::Unknown => "access to",
+        };
+        if self.overflow() {
+            let _ = write!(b, "{what} 0x{:016X}, below the thread's stack", self.addr);
+        } else if matches!(self.signal, SIGSEGV | SIGBUS) {
+            let _ = write!(b, "{what} 0x{:016X}", self.addr);
+        } else {
+            let _ = write!(b, "at 0x{:016X}", self.addr);
+        }
+        if let Some(c) = self.code_name() {
+            let _ = write!(b, " ({c})");
+        }
+    }
+}
+
+/// An image that holds an address, as `dladdr` names it.
+struct Module<'a> {
+    path: &'a [u8],
+    base: usize,
+    symbol: Option<(&'a [u8], usize)>,
+}
+
+/// A fixed buffer to format into without allocating (what doesn't fit is cut off).
+struct Buf {
+    bytes: [u8; 8192],
+    len: usize,
+}
+
+impl Buf {
+    fn new() -> Buf {
+        Buf { bytes: [0; 8192], len: 0 }
+    }
+
+    fn room(&self) -> usize {
+        self.bytes.len().saturating_sub(self.len)
+    }
+
+    fn as_bytes(&self) -> &[u8] {
+        self.bytes.get(..self.len).unwrap_or_default()
+    }
+
+    /// `s` as the inside of a JSON string, at most `max` bytes of it (bytes that aren't UTF-8
+    /// and control characters become `?`).
+    fn escaped(&mut self, s: &[u8], max: usize) {
+        for chunk in s.get(..s.len().min(max)).unwrap_or_default().utf8_chunks() {
+            for c in chunk.valid().chars() {
+                let _ = match c {
+                    '"' => self.write_str("\\\""),
+                    '\\' => self.write_str("\\\\"),
+                    c if (c as u32) < 0x20 => self.write_str("?"),
+                    c => self.write_char(c),
+                };
+            }
+            if !chunk.invalid().is_empty() {
+                let _ = self.write_str("?");
+            }
+        }
+    }
+}
+
+impl std::fmt::Write for Buf {
+    fn write_str(&mut self, s: &str) -> std::fmt::Result {
+        let n = s.len().min(self.room());
+        if let (Some(to), Some(from)) = (self.bytes.get_mut(self.len..self.len + n), s.as_bytes().get(..n)) {
+            to.copy_from_slice(from);
+            self.len += n;
+        }
+        Ok(())
+    }
+}
+
+/// The last part of a path.
+fn file_name(path: &[u8]) -> &[u8] {
+    path.rsplit(|&c| c == b'/').next().unwrap_or(path)
+}
+
+/// The report: what the signal says, then (with `resolve`) the module of the faulting
+/// instruction and the `frames`. Always valid JSON: frames stop while there is room to close it.
+fn json(b: &mut Buf, f: &Fault, frames: &[usize], resolve: impl Fn(usize, bool) -> Option<Module<'static>>) {
+    let signal = f.signal_name();
+    let _ = write!(b, "{{\"signal\":\"{signal}\",\"number\":{},\"code\":\"{signal}\",\"name\":\"{}\"", f.signal, f.name());
+    let _ = write!(b, ",\"si_code\":{},\"address\":\"0x{:016X}\",\"thread\":{},\"pid\":{}", f.si_code, f.pc, f.thread, f.pid);
+    let name = f.thread_name.split(|&c| c == 0).next().unwrap_or_default();
+    if !name.is_empty() {
+        let _ = b.write_str(",\"thread_name\":\"");
+        b.escaped(name, 64);
+        let _ = b.write_str("\"");
+    }
+    let mark = b.len;
+    let _ = b.write_str(",\"detail\":\"");
+    let start = b.len;
+    f.detail(b);
+    if b.len == start {
+        b.len = mark;
+    } else {
+        let _ = b.write_str("\"");
+    }
+    if let Some(m) = resolve(f.pc, false) {
+        let _ = write!(b, ",\"offset\":\"0x{:X}\",\"module\":\"", f.pc.wrapping_sub(m.base));
+        b.escaped(m.path, 300);
+        let _ = b.write_str("\"");
+    }
+    if !frames.is_empty() {
+        let _ = b.write_str(",\"frames\":[");
+        for (i, &at) in frames.iter().enumerate() {
+            // A frame is at most ~300 bytes; keep room for it and the closing `]}`.
+            if b.room() < 400 {
+                break;
+            }
+            if i > 0 {
+                let _ = b.write_str(",");
+            }
+            let _ = b.write_str("\"");
+            // A return address points after the call: look up the call itself.
+            match resolve(at, i > 0) {
+                Some(m) => {
+                    b.escaped(file_name(m.path), 100);
+                    let _ = write!(b, "+0x{:X}", at.wrapping_sub(m.base));
+                    if let Some((symbol, start)) = m.symbol {
+                        let _ = b.write_str(" ");
+                        b.escaped(symbol, 160);
+                        let _ = write!(b, "+0x{:X}", at.wrapping_sub(start));
+                    }
+                }
+                None => {
+                    let _ = write!(b, "0x{at:016X}");
+                }
+            }
+            let _ = b.write_str("\"");
+        }
+        let _ = b.write_str("]");
+    }
+    let _ = b.write_str("}");
+}
+
+/// The return addresses up the frame-pointer chain from `fp`, after `pc`. `read` gives the word
+/// at an address; frames outside `stack`, misaligned or not going up end the walk.
+fn walk(pc: usize, fp: usize, stack: (usize, usize), read: impl Fn(usize) -> Option<usize>, out: &mut [usize; MAX_FRAMES]) -> usize {
+    let (low, high) = stack;
+    let mut n = 0;
+    if let Some(slot) = out.get_mut(n) {
+        *slot = pc;
+        n += 1;
+    }
+    let mut fp = fp;
+    while n < MAX_FRAMES {
+        let in_stack = fp >= low && fp.checked_add(16).is_some_and(|end| end <= high);
+        if !fp.is_multiple_of(8) || !in_stack {
+            break;
+        }
+        let (Some(next), Some(ret)) = (read(fp), read(fp + 8)) else { break };
+        let ret = strip_pointer_auth(ret);
+        if ret == 0 {
+            break;
+        }
+        if let Some(slot) = out.get_mut(n) {
+            *slot = ret;
+            n += 1;
+        }
+        if next <= fp {
+            break;
+        }
+        fp = next;
+    }
+    n
+}
+
+/// Return addresses saved by arm64e code carry a signature in their top bits.
+fn strip_pointer_auth(addr: usize) -> usize {
+    if cfg!(target_arch = "aarch64") { addr & 0x0000_7FFF_FFFF_FFFF } else { addr }
+}
+
+/// Read what the signal and the interrupted thread's registers say.
+unsafe fn fault(signal: c_int, info: *const siginfo_t, context: *const c_void) -> Fault {
+    let mut f = Fault {
+        signal,
+        si_code: 0,
+        addr: 0,
+        pc: 0,
+        fp: 0,
+        access: Access::Unknown,
+        fault: false,
+        sender: 0,
+        // SAFETY: async-signal-safe.
+        pid: unsafe { libc::getpid() },
+        thread: 0,
+        thread_name: [0; 64],
+        stack: (0, 0),
+    };
+    if !info.is_null() {
+        // SAFETY: the system passes a valid siginfo for the duration of the handler.
+        let info = unsafe { &*info };
+        f.si_code = info.si_code;
+        f.addr = info.si_addr as usize;
+        f.sender = info.si_pid;
+        // Without registers (never seen), the signal's own code has to do.
+        f.fault = signal != SIGABRT && (1..0x10000).contains(&f.si_code);
+    }
+    let context = context as *const UContext;
+    // SAFETY: an SA_SIGINFO handler's third argument is the interrupted thread's ucontext, whose
+    // machine context pointer the kernel fills in.
+    let mcontext = if context.is_null() { std::ptr::null() } else { unsafe { (*context).mcontext } };
+    if !mcontext.is_null() {
+        // SAFETY: as above.
+        let m = unsafe { &*mcontext };
+        #[cfg(target_arch = "aarch64")]
+        {
+            f.pc = strip_pointer_auth(m.pc as usize);
+            f.fp = m.fp as usize;
+            f.fault = arm64_fault(signal, f.si_code, f.addr, m.esr, m.far);
+            // A data abort says whether it was a write (WnR); an instruction abort is execution.
+            f.access = match m.esr >> 26 {
+                0x24 | 0x25 if m.esr & (1 << 6) != 0 => Access::Write,
+                0x24 | 0x25 => Access::Read,
+                0x20 | 0x21 => Access::Execute,
+                _ => Access::Unknown,
+            };
+        }
+        #[cfg(target_arch = "x86_64")]
+        {
+            f.pc = m.rip as usize;
+            f.fp = m.gpr.get(6).copied().unwrap_or(0) as usize;
+            f.fault = x86_fault(signal, f.si_code, f.addr, m.trapno, m.faultvaddr);
+            // A page fault's error code: bit 4 instruction fetch, bit 1 write.
+            f.access = match (m.trapno, m.err) {
+                (14, e) if e & 0x10 != 0 => Access::Execute,
+                (14, e) if e & 0x2 != 0 => Access::Write,
+                (14, _) => Access::Read,
+                _ => Access::Unknown,
+            };
+        }
+    }
+    if f.pc == 0 && matches!(signal, SIGILL | SIGFPE | SIGTRAP) {
+        f.pc = f.addr;
+    }
+    // SAFETY: these read the calling thread's own pthread structure; the buffers are as long as
+    // we say.
+    unsafe {
+        let me = libc::pthread_self();
+        libc::pthread_threadid_np(me, &mut f.thread);
+        libc::pthread_getname_np(me, f.thread_name.as_mut_ptr().cast(), f.thread_name.len());
+        let high = libc::pthread_get_stackaddr_np(me) as usize;
+        let size = libc::pthread_get_stacksize_np(me);
+        if let Some(low) = high.checked_sub(size) {
+            f.stack = (low, high);
+        }
+    }
+    f
+}
+
+/// The image that holds `addr` (the call before it, for a return address).
+fn resolve(addr: usize, return_address: bool) -> Option<Module<'static>> {
+    let at = if return_address { addr.saturating_sub(1) } else { addr };
+    // SAFETY: `Dl_info` is plain data; all zeros is a valid value.
+    let mut info: libc::Dl_info = unsafe { std::mem::zeroed() };
+    // SAFETY: `dladdr` only reads dyld's image list; the strings it returns live as long as the
+    // image, which a crashing process never unloads.
+    unsafe {
+        if libc::dladdr(at as *const c_void, &mut info) == 0 || info.dli_fname.is_null() {
+            return None;
+        }
+        let symbol = (!info.dli_sname.is_null()).then(|| (CStr::from_ptr(info.dli_sname).to_bytes(), info.dli_saddr as usize));
+        Some(Module { path: CStr::from_ptr(info.dli_fname).to_bytes(), base: info.dli_fbase as usize, symbol })
+    }
+}
+
+/// Write what the signal says into the info file, then again with the modules and frames.
+fn record(f: &Fault) {
+    let Some(path) = PATH.get() else { return };
+    // SAFETY: NUL-terminated path; the descriptor is closed below.
+    let fd = unsafe { libc::open(path.as_ptr(), libc::O_WRONLY | libc::O_CREAT | libc::O_TRUNC | libc::O_CLOEXEC, 0o600) };
+    if fd < 0 {
+        return;
+    }
+    let mut b = Buf::new();
+    json(&mut b, f, &[], |_, _| None);
+    let bytes = b.as_bytes();
+    // SAFETY: the buffer is as long as we say.
+    unsafe { libc::write(fd, bytes.as_ptr().cast(), bytes.len()) };
+    let mut frames = [0usize; MAX_FRAMES];
+    // SAFETY: `walk` only reads inside the thread's own stack, 8-byte aligned.
+    let n = walk(f.pc, f.fp, f.stack, |at| Some(unsafe { (at as *const usize).read() }), &mut frames);
+    b.len = 0;
+    json(&mut b, f, frames.get(..n).unwrap_or_default(), resolve);
+    let bytes = b.as_bytes();
+    // SAFETY: as above.
+    unsafe {
+        if libc::pwrite(fd, bytes.as_ptr().cast(), bytes.len(), 0) == bytes.len() as isize {
+            libc::ftruncate(fd, bytes.len() as libc::off_t);
+        }
+        libc::close(fd);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use std::os::unix::process::ExitStatusExt;
+    use std::path::{Path, PathBuf};
+
+    use super::*;
+
+    fn fault(signal: c_int, si_code: c_int, addr: usize) -> Fault {
+        let mut thread_name = [0u8; 64];
+        thread_name[..4].copy_from_slice(b"main");
+        Fault {
+            signal,
+            si_code,
+            addr,
+            pc: 0x1_0000_1234,
+            fp: 0,
+            access: Access::Read,
+            fault: true,
+            sender: 0,
+            pid: 77,
+            thread: 4242,
+            thread_name,
+            stack: (0x7000_0000, 0x7080_0000),
+        }
+    }
+
+    fn report(f: &Fault, frames: &[usize]) -> serde_json::Value {
+        let mut b = Buf::new();
+        json(&mut b, f, frames, |at, _| {
+            (at >= 0x1_0000_0000).then_some(Module {
+                path: b"/Applications/SolidCraft.app/Contents/MacOS/solidcraft",
+                base: 0x1_0000_0000,
+                symbol: Some((b"_ZN4main17h0123456789abcdefE", 0x1_0000_1200)),
+            })
+        });
+        serde_json::from_slice(b.as_bytes()).unwrap()
+    }
+
+    #[test]
+    fn a_segfault_says_the_signal_the_address_read_and_the_module() {
+        let v = report(&fault(SIGSEGV, 1, 0x10), &[0x1_0000_1234, 0x1_0000_2000, 0x5000]);
+        assert_eq!(v["signal"], "SIGSEGV");
+        assert_eq!(v["code"], "SIGSEGV");
+        assert_eq!(v["name"], "segmentation fault");
+        assert_eq!(v["detail"], "read of 0x0000000000000010 (SEGV_MAPERR)");
+        assert_eq!(v["address"], "0x0000000100001234");
+        assert_eq!(v["module"], "/Applications/SolidCraft.app/Contents/MacOS/solidcraft");
+        assert_eq!(v["offset"], "0x1234");
+        assert_eq!(v["thread"], 4242);
+        assert_eq!(v["thread_name"], "main");
+        assert_eq!(v["pid"], 77);
+        let frames: Vec<&str> = v["frames"].as_array().unwrap().iter().map(|f| f.as_str().unwrap()).collect();
+        assert_eq!(
+            frames,
+            ["solidcraft+0x1234 _ZN4main17h0123456789abcdefE+0x34", "solidcraft+0x2000 _ZN4main17h0123456789abcdefE+0xE00", "0x0000000000005000"]
+        );
+    }
+
+    #[test]
+    fn a_fault_below_the_stack_is_a_stack_overflow() {
+        let mut f = fault(SIGBUS, 2, 0x7000_0000 - 0x100);
+        f.access = Access::Write;
+        let v = report(&f, &[]);
+        assert_eq!(v["name"], "stack overflow");
+        assert_eq!(v["code"], "SIGBUS");
+        assert_eq!(v["detail"], "write to 0x000000006FFFFF00, below the thread's stack (BUS_ADRERR)");
+        // Far below it, or inside it, it is not.
+        assert_eq!(report(&fault(SIGBUS, 2, 0x10), &[])["name"], "bus error");
+        assert_eq!(report(&fault(SIGSEGV, 2, 0x7040_0000), &[])["name"], "segmentation fault");
+        // Nor without knowing the stack.
+        let mut f = fault(SIGSEGV, 1, 0x7000_0000 - 0x100);
+        f.stack = (0, 0);
+        assert_eq!(report(&f, &[])["name"], "segmentation fault");
+    }
+
+    #[test]
+    fn an_abort_or_a_signal_sent_by_another_process_has_no_address_detail() {
+        let mut f = fault(SIGABRT, 0, 0);
+        f.fault = false;
+        f.sender = 77;
+        let v = report(&f, &[]);
+        assert_eq!(v["signal"], "SIGABRT");
+        assert_eq!(v["name"], "abort");
+        assert!(v.get("detail").is_none(), "{v}");
+        let mut f = fault(SIGSEGV, 0x10001, 0);
+        f.fault = false;
+        f.sender = 501;
+        assert_eq!(report(&f, &[])["detail"], "sent by process 501");
+        // `kill` without a sender, or `raise`.
+        f.sender = 0;
+        assert_eq!(report(&f, &[])["detail"], "sent with kill or raise, not a fault");
+        // A trap names the instruction.
+        assert_eq!(report(&fault(SIGTRAP, 1, 0x1_0000_1234), &[])["detail"], "at 0x0000000100001234");
+    }
+
+    #[test]
+    fn only_a_fault_runs_again_when_the_handler_returns() {
+        // Measured on an M5 Pro, macOS 27: a read of address 16, then `kill -SEGV` while the
+        // thread waits in a system call. Both have si_code 2.
+        assert!(arm64_fault(SIGSEGV, 2, 0x10, 0x9200_0046, 0x10));
+        assert!(!arm64_fault(SIGSEGV, 2, 0, 0x5600_0080, 0));
+        assert!(!arm64_fault(SIGBUS, 1, 0, 0x5600_0080, 0));
+        // A data abort long past, while the signal names no address.
+        assert!(!arm64_fault(SIGSEGV, 2, 0, 0x9200_0046, 0x10));
+        // A trap instruction (BRK) or an undefined one; but not a system call.
+        assert!(arm64_fault(SIGTRAP, 1, 0x1000, 0xF200_0001, 0));
+        assert!(arm64_fault(SIGILL, 1, 0x1000, 0x0200_0000, 0));
+        assert!(!arm64_fault(SIGILL, 1, 0x1000, 0x5600_0080, 0));
+        // Sent: SI_USER, no code, or an abort.
+        assert!(!arm64_fault(SIGSEGV, 0x10001, 0x10, 0x9200_0046, 0x10));
+        assert!(!arm64_fault(SIGTRAP, 0, 0, 0xF200_0001, 0));
+        assert!(!arm64_fault(SIGABRT, 1, 0, 0x5600_0080, 0));
+        // x86_64: a page fault at its address, a general protection fault, ud2, int3.
+        assert!(x86_fault(SIGSEGV, 1, 0x10, 14, 0x10));
+        assert!(!x86_fault(SIGSEGV, 1, 0, 14, 0x10));
+        assert!(x86_fault(SIGSEGV, 1, 0, 13, 0));
+        assert!(x86_fault(SIGILL, 1, 0x1000, 6, 0));
+        assert!(x86_fault(SIGTRAP, 1, 0x1000, 3, 0));
+        assert!(!x86_fault(SIGILL, 1, 0x1000, 14, 0));
+    }
+
+    #[test]
+    fn names_with_quotes_control_characters_or_bad_utf8_stay_valid_json() {
+        let mut f = fault(SIGILL, 1, 0x1_0000_1234);
+        f.thread_name = [0; 64];
+        f.thread_name[..7].copy_from_slice(b"a\"b\\\n\xFFc");
+        let v = report(&f, &[]);
+        assert_eq!(v["thread_name"], "a\"b\\??c");
+    }
+
+    #[test]
+    fn a_report_with_long_names_still_closes_its_json() {
+        let long: &'static [u8] = Box::leak(vec![b'x'; 4000].into_boxed_slice());
+        let f = fault(SIGSEGV, 1, 0x10);
+        let mut b = Buf::new();
+        json(&mut b, &f, &[0x1_0000_1234; MAX_FRAMES], |_, _| Some(Module { path: long, base: 0x1_0000_0000, symbol: Some((long, 0x1_0000_0000)) }));
+        let v: serde_json::Value = serde_json::from_slice(b.as_bytes()).unwrap();
+        assert_eq!(v["module"].as_str().unwrap().len(), 300);
+        let frames = v["frames"].as_array().unwrap();
+        assert!(!frames.is_empty() && frames.len() <= MAX_FRAMES, "{}", frames.len());
+    }
+
+    #[test]
+    fn the_frame_walk_stays_on_the_stack_and_goes_up() {
+        let stack = (0x1000, 0x2000);
+        // Three frames: 0x1100 -> 0x1200 -> 0x1300 -> 0 (end).
+        let memory = |at: usize| match at {
+            0x1100 => Some(0x1200),
+            0x1108 => Some(0xA),
+            0x1200 => Some(0x1300),
+            0x1208 => Some(0xB),
+            0x1300 => Some(0),
+            0x1308 => Some(0xC),
+            _ => None,
+        };
+        let mut out = [0; MAX_FRAMES];
+        let n = walk(0x9, 0x1100, stack, memory, &mut out);
+        assert_eq!(&out[..n], &[0x9, 0xA, 0xB, 0xC]);
+        // A frame pointer off the stack, misaligned, or one that doesn't go up ends the walk.
+        assert_eq!(walk(0x9, 0x3000, stack, memory, &mut out), 1);
+        assert_eq!(walk(0x9, 0x1101, stack, memory, &mut out), 1);
+        let looping = |at: usize| if at.is_multiple_of(16) { Some(at) } else { Some(0xA) };
+        assert_eq!(walk(0x9, 0x1100, stack, looping, &mut out), 2);
+        // A chain that never ends stops at MAX_FRAMES.
+        let endless = |at: usize| if at.is_multiple_of(16) { Some(at + 16) } else { Some(0xA) };
+        assert_eq!(walk(0x9, 0x1000, stack, endless, &mut out), MAX_FRAMES);
+    }
+
+    /// The child half: install crash reporting and the handler, then crash the way
+    /// `SOLIDCRAFT_NATIVE_CRASH_FAULT` says.
+    #[test]
+    fn child() {
+        let Some(dir) = std::env::var_os("SOLIDCRAFT_NATIVE_CRASH_CHILD") else { return };
+        let build = solidcraft_engine::crash::Build { version: "9.9.9", commit: "abc1234", built: "2026-10-25" };
+        let fresh = solidcraft_engine::crash::install(PathBuf::from(dir), build);
+        println!("FRESH {}", serde_json::to_string(&fresh).unwrap_or_default());
+        let Some(fault) = std::env::var_os("SOLIDCRAFT_NATIVE_CRASH_FAULT") else {
+            solidcraft_engine::crash::end_session();
+            return;
+        };
+        super::install();
+        solidcraft_engine::crash::phase("device creation");
+        match fault.to_str() {
+            Some("abort") => std::process::abort(),
+            Some("overflow") => println!("unreachable {}", recurse(0)),
+            Some("raise") => {
+                // SAFETY: none needed; this is the crash under test.
+                unsafe { libc::raise(SIGSEGV) };
+                println!("survived");
+            }
+            _ => segfault(),
+        }
+    }
+
+    /// Runs out of stack.
+    #[inline(never)]
+    fn recurse(n: u64) -> u64 {
+        let a = std::hint::black_box([n; 64]);
+        if n == u64::MAX { 0 } else { recurse(n + 1).wrapping_add(a[0]) }
+    }
+
+    /// The crash under test: a read of address 16, as a null struct pointer's field would be.
+    #[inline(never)]
+    fn segfault() {
+        // SAFETY: none; this is the crash under test.
+        let v = unsafe { std::ptr::read_volatile(std::hint::black_box(16usize) as *const u64) };
+        println!("unreachable {v}");
+    }
+
+    fn run(dir: &Path, fault: Option<&str>) -> std::process::Output {
+        let mut c = std::process::Command::new(std::env::current_exe().unwrap());
+        c.args(["--exact", "native_crash_macos::tests::child", "--test-threads=1", "--nocapture"]).env("SOLIDCRAFT_NATIVE_CRASH_CHILD", dir);
+        if let Some(f) = fault {
+            c.env("SOLIDCRAFT_NATIVE_CRASH_FAULT", f);
+        }
+        c.output().unwrap()
+    }
+
+    /// Crash a child the way `fault` says; returns what the handler wrote and the next start's report.
+    fn crash(name: &str, fault: &str, signal: c_int) -> (serde_json::Value, serde_json::Value, String) {
+        let dir = std::env::temp_dir().join(format!("solidcraft-native-crash-{name}-{}", std::process::id()));
+        let _ = std::fs::remove_dir_all(&dir);
+        let out = run(&dir, Some(fault));
+        assert_eq!(out.status.signal(), Some(signal), "the child died of the signal itself: {out:?}");
+        let stderr = String::from_utf8_lossy(&out.stderr).into_owned();
+        let info =
+            std::fs::read_dir(dir.join("sessions")).unwrap().flatten().map(|e| e.path()).find(|p| p.to_string_lossy().ends_with(".native.json"));
+        let info = info.expect("the handler wrote what it caught");
+        let v: serde_json::Value = serde_json::from_slice(&std::fs::read(info).unwrap()).unwrap();
+        // The next start reports it.
+        let out = run(&dir, None);
+        assert!(out.status.success(), "{out:?}");
+        let reports = solidcraft_engine::crash::list(&dir);
+        assert_eq!(reports.len(), 1, "{reports:?}");
+        let r = solidcraft_engine::crash::read(&dir, &reports[0].id).unwrap();
+        let _ = std::fs::remove_dir_all(&dir);
+        (v, r, stderr)
+    }
+
+    #[test]
+    fn a_segfault_is_reported_with_its_signal_module_frames_and_step() {
+        let (v, r, _) = crash("segv", "segv", SIGSEGV);
+        assert_eq!(v["signal"], "SIGSEGV", "{v}");
+        // Address 16 is in __PAGEZERO, mapped without access: SEGV_ACCERR.
+        assert_eq!(v["detail"], "read of 0x0000000000000010 (SEGV_ACCERR)", "{v}");
+        assert!(v["module"].as_str().unwrap().contains("solidcraft"), "the fault is in the test binary: {v}");
+        let frames = v["frames"].as_array().unwrap();
+        assert!(frames.len() >= 3, "{v}");
+        assert!(frames.iter().any(|f| f.as_str().unwrap().contains("child")), "the walk reaches the test that crashed: {v}");
+        let message = r["message"].as_str().unwrap();
+        assert!(message.contains("segmentation fault (SIGSEGV) in solidcraft"), "{r}");
+        assert!(message.contains("during startup (device creation"), "{r}");
+        assert_eq!(r["kind"], "unclean_exit");
+        assert_eq!(r["native"]["signal"], "SIGSEGV");
+        assert!(r["backtrace"].as_array().unwrap().iter().any(|f| f.as_str().unwrap().contains("segfault")), "{r}");
+    }
+
+    #[test]
+    fn an_abort_is_reported_as_sigabrt_with_the_code_that_called_it() {
+        let (v, r, _) = crash("abrt", "abort", SIGABRT);
+        assert_eq!(v["signal"], "SIGABRT", "{v}");
+        assert!(v.get("detail").is_none(), "{v}");
+        let frames = v["frames"].as_array().unwrap();
+        assert!(frames.iter().any(|f| f.as_str().unwrap().contains("abort")), "{v}");
+        assert!(r["message"].as_str().unwrap().contains("abort (SIGABRT)"), "{r}");
+    }
+
+    #[test]
+    fn a_stack_overflow_is_recorded_and_the_standard_library_still_says_so() {
+        // The fault on the guard page is recorded on the alternate stack; the standard library's
+        // handler, called after ours, prints its message and aborts.
+        let (v, r, stderr) = crash("overflow", "overflow", SIGABRT);
+        assert!(matches!(v["signal"].as_str(), Some("SIGSEGV" | "SIGBUS")), "{v}");
+        assert_eq!(v["name"], "stack overflow", "{v}");
+        assert!(v["detail"].as_str().unwrap().contains("below the thread's stack"), "{v}");
+        assert!(stderr.contains("has overflowed its stack"), "{stderr}");
+        assert!(r["message"].as_str().unwrap().contains("stack overflow ("), "{r}");
+    }
+
+    #[test]
+    fn a_segfault_signal_that_was_only_sent_still_ends_the_app() {
+        // The standard library's handler, which comes before ours, returns expecting the fault
+        // to happen again; a sent signal never does, so it goes to the default action instead.
+        let (v, r, _) = crash("raise", "raise", SIGSEGV);
+        assert_eq!(v["detail"], "sent with kill or raise, not a fault", "{v}");
+        assert!(r["message"].as_str().unwrap().contains("(SIGSEGV)"), "{r}");
+    }
+}
@@ -15,10 +15,14 @@
 //! window rescales once at the crossing and stays under the pointer, instead of the OS's move
 //! loop and winit disagreeing about a frame the window doesn't have.
 //!
-//! Replacing a window procedure has no safe API, hence the `unsafe_code` allowance on this
-//! module (the app crate denies it; see `native_crash.rs` and `open_documents.rs` for the others).
+//! Replacing a window procedure and setting a window class's icon have no safe API, hence the
+//! `unsafe_code` allowance on this module (the app crate denies it; see `native_crash.rs` and
+//! `open_documents.rs` for the others).
 //! The procedure is installed once, on the thread that owns the window, for the main window only,
 //! and calls the previous one (winit's) for everything it doesn't answer.
+//!
+//! [`set_class_icon`] gives the window's class the exe's icon, so the taskbar button shows the
+//! mark even when the window is too busy to answer the taskbar's request for its icon.
 #![allow(unsafe_code)]

 use std::sync::atomic::{AtomicIsize, Ordering};
@@ -26,12 +30,81 @@ use std::sync::atomic::{AtomicIsize, Ordering};
 use raw_window_handle::{HasWindowHandle, RawWindowHandle};
 use solidcraft_ui_egui::titlebar;
 use windows_sys::Win32::Foundation::{HWND, LPARAM, LRESULT, RECT, SIZE, WPARAM};
+use windows_sys::Win32::Graphics::Gdi::{GetMonitorInfoW, MONITOR_DEFAULTTONEAREST, MONITORINFO, MonitorFromWindow};
+use windows_sys::Win32::System::LibraryLoader::GetModuleHandleW;
 use windows_sys::Win32::UI::HiDpi::{GetDpiForWindow, GetSystemMetricsForDpi};
 use windows_sys::Win32::UI::WindowsAndMessaging::{
-    CallWindowProcW, GWL_STYLE, GWLP_WNDPROC, GetClientRect, GetWindowLongPtrW, GetWindowRect, HTBOTTOM, HTBOTTOMLEFT, HTBOTTOMRIGHT, HTLEFT,
-    HTRIGHT, HTTOP, HTTOPLEFT, HTTOPRIGHT, IsIconic, IsZoomed, SM_CXPADDEDBORDER, SM_CXSIZEFRAME, SetWindowLongPtrW, WM_GETDPISCALEDSIZE,
-    WM_NCDESTROY, WM_NCHITTEST, WNDPROC, WS_THICKFRAME,
+    CallWindowProcW, GCLP_HICON, GCLP_HICONSM, GWL_STYLE, GWLP_WNDPROC, GetClientRect, GetWindowLongPtrW, GetWindowRect, HTBOTTOM, HTBOTTOMLEFT,
+    HTBOTTOMRIGHT, HTLEFT, HTRIGHT, HTTOP, HTTOPLEFT, HTTOPRIGHT, IMAGE_ICON, IsIconic, IsZoomed, LR_DEFAULTCOLOR, LoadImageW, SM_CXICON,
+    SM_CXPADDEDBORDER, SM_CXSIZEFRAME, SM_CXSMICON, SetWindowLongPtrW, WM_GETDPISCALEDSIZE, WM_NCDESTROY, WM_NCHITTEST, WNDPROC, WS_THICKFRAME,
 };
+// windows-sys has SetClassLongPtrW only on 64-bit targets; on 32-bit Windows it is SetClassLongW.
+#[cfg(target_pointer_width = "64")]
+use windows_sys::Win32::UI::WindowsAndMessaging::SetClassLongPtrW;
+#[cfg(target_pointer_width = "32")]
+use windows_sys::Win32::UI::WindowsAndMessaging::SetClassLongW as SetClassLongPtrW;
+
+/// The work area (the monitor without the taskbar) of the monitor nearest the window, in physical
+/// pixels: left, top, width, height.
+pub fn work_area(window: &impl HasWindowHandle) -> Option<(i32, i32, i32, i32)> {
+    let handle = window.window_handle().ok()?;
+    let RawWindowHandle::Win32(w) = handle.as_raw() else { return None };
+    let hwnd = w.hwnd.get() as HWND;
+    // SAFETY: `hwnd` is the live main window; `info` is a MONITORINFO with its size set, as
+    // GetMonitorInfoW requires, and the monitor handle comes from the call before it.
+    let rc = unsafe {
+        let monitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
+        let mut info: MONITORINFO = std::mem::zeroed();
+        info.cbSize = std::mem::size_of::<MONITORINFO>() as u32;
+        if monitor.is_null() || GetMonitorInfoW(monitor, &mut info) == 0 {
+            return None;
+        }
+        info.rcWork
+    };
+    Some((rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top))
+}
+
+/// The exe's icon resource (`build.rs` embeds it as `1 ICON`).
+const ICON_RESOURCE: usize = 1;
+
+/// Give the main window's class the exe's icon, big and small. Call it before the window is
+/// shown (eframe's app creator).
+///
+/// The taskbar asks a window for its icon when the window appears. eframe sets the window's
+/// icon before that, while the window is still hidden, and then shows the window at the end of
+/// its first frame; if that frame is slow, or startup kept the thread busy long enough for
+/// Windows to mark the window as not responding, the request isn't answered in time. The taskbar then
+/// takes the window class's icon and doesn't ask again. winit registers its class without one,
+/// so the button showed Windows' generic icon for as long as the window was open.
+/// `false` if it isn't a Win32 window or the exe's icon doesn't load; SetClassLongPtrW's own
+/// failure can't be told from a class that had no icon (both return 0), so it isn't reported.
+pub fn set_class_icon(window: &impl HasWindowHandle) -> bool {
+    let Ok(handle) = window.window_handle() else { return false };
+    let RawWindowHandle::Win32(w) = handle.as_raw() else { return false };
+    let hwnd = w.hwnd.get() as HWND;
+    // SAFETY: a plain query on the live main window.
+    let dpi = unsafe { GetDpiForWindow(hwnd) };
+    let (Some(big), Some(small)) = (exe_icon(SM_CXICON, dpi), exe_icon(SM_CXSMICON, dpi)) else { return false };
+    // SAFETY: `hwnd` is the live main window and both icons are valid handles. The class keeps
+    // them for the rest of the process, so they are never destroyed. `as _`: on 32-bit Windows
+    // this is SetClassLongW (see the imports), which takes an i32.
+    unsafe {
+        SetClassLongPtrW(hwnd, GCLP_HICON, big as _);
+        SetClassLongPtrW(hwnd, GCLP_HICONSM, small as _);
+    }
+    true
+}
+
+/// The exe's icon at the size of system metric `metric` (`SM_CXICON`, `SM_CXSMICON`) at `dpi`.
+fn exe_icon(metric: i32, dpi: u32) -> Option<windows_sys::Win32::Foundation::HANDLE> {
+    // SAFETY: GetModuleHandleW(null) is this exe, loaded for the life of the process; the name
+    // is an integer resource id (MAKEINTRESOURCE), which LoadImageW accepts in place of a string.
+    let icon = unsafe {
+        let size = GetSystemMetricsForDpi(metric, dpi);
+        LoadImageW(GetModuleHandleW(std::ptr::null()), std::ptr::without_provenance(ICON_RESOURCE), IMAGE_ICON, size, size, LR_DEFAULTCOLOR)
+    };
+    (!icon.is_null()).then_some(icon)
+}

 /// The window procedure ours replaced (winit's), as an address; 0 before [`install`].
 static PREVIOUS: AtomicIsize = AtomicIsize::new(0);
@@ -0,0 +1,195 @@
+//! macOS system menus, owned and updated on eframe's main thread.
+
+use std::sync::mpsc::{Receiver, sync_channel};
+
+use muda::{
+    AboutMetadata, Menu, MenuEvent, MenuItem, PredefinedMenuItem, Submenu,
+    accelerator::{Accelerator, Code, Modifiers},
+};
+use solidcraft_ui_egui::{SolveApp, toolbar::FileAction};
+
+pub struct NativeMenu {
+    menu: Menu,
+    actions: Vec<(MenuItem, FileAction)>,
+    help_actions: Vec<(MenuItem, &'static str)>,
+    events: Receiver<MenuEvent>,
+    recent: Submenu,
+    recent_paths: Vec<String>,
+}
+
+impl NativeMenu {
+    pub fn new(app: &SolveApp, ctx: &egui::Context) -> muda::Result<Self> {
+        let menu = Menu::new();
+        let application = Submenu::new("SolidCraft", true);
+        let file = Submenu::new(app.tr("ui.file"), true);
+        let edit = Submenu::new(app.tr_label("Edit"), true);
+        let recent = Submenu::new(app.tr("ui.open_recent"), true);
+        let window = Submenu::new("Window", true);
+        let help = Submenu::new(app.tr("ui.help"), true);
+        let mut help_actions = Vec::new();
+        let mut actions = Vec::new();
+        let mut add = |parent: &Submenu, label: &str, action: FileAction, shortcut: Option<Accelerator>| -> muda::Result<()> {
+            let item = MenuItem::new(label, Self::action_enabled(&action, app, ctx), shortcut);
+            parent.append(&item)?;
+            actions.push((item, action));
+            Ok(())
+        };
+        application.append(&PredefinedMenuItem::about(
+            Some("About SolidCraft"),
+            Some(AboutMetadata { name: Some("SolidCraft".into()), version: Some(env!("CARGO_PKG_VERSION").into()), ..Default::default() }),
+        ))?;
+        application.append(&PredefinedMenuItem::separator())?;
+        add(
+            &application,
+            &format!("{}\u{2026}", app.tr("ui.preferences")),
+            FileAction::Settings,
+            Some(Accelerator::new(Modifiers::META, Code::Comma)),
+        )?;
+        add(&application, &format!("{}\u{2026}", app.tr("ui.keyboard_shortcuts")), FileAction::Shortcuts, None)?;
+        application.append(&PredefinedMenuItem::separator())?;
+        application.append(&PredefinedMenuItem::services(None))?;
+        application.append(&PredefinedMenuItem::separator())?;
+        application.append_items(&[
+            &PredefinedMenuItem::hide(Some("Hide SolidCraft")),
+            &PredefinedMenuItem::hide_others(None),
+            &PredefinedMenuItem::show_all(None),
+            &PredefinedMenuItem::separator(),
+        ])?;
+        add(&application, &format!("{} SolidCraft", app.tr("ui.quit")), FileAction::Quit, Some(Accelerator::new(Modifiers::META, Code::KeyQ)))?;
+        add(&file, app.tr("ui.new_design"), FileAction::New, Some(Accelerator::new(Modifiers::META, Code::KeyN)))?;
+        add(&file, &format!("{}\u{2026}", app.tr("ui.open")), FileAction::Open, Some(Accelerator::new(Modifiers::META, Code::KeyO)))?;
+        file.append(&recent)?;
+        file.append(&PredefinedMenuItem::separator())?;
+        for (label, command) in
+            [("Insert STEP\u{2026}", "file.insert_step"), ("Insert Mesh\u{2026}", "file.insert_mesh"), ("Insert Design", "component.insert_design")]
+        {
+            add(&file, app.tr_label(label), FileAction::Command(command), None)?;
+        }
+        file.append(&PredefinedMenuItem::separator())?;
+        add(&file, app.tr("ui.save"), FileAction::Save, Some(Accelerator::new(Modifiers::META, Code::KeyS)))?;
+        add(
+            &file,
+            &format!("{}\u{2026}", app.tr("ui.save_as")),
+            FileAction::SaveAs,
+            Some(Accelerator::new(Modifiers::META | Modifiers::SHIFT, Code::KeyS)),
+        )?;
+        add(&file, app.tr_label("Save As JSON\u{2026}"), FileAction::SaveJson, None)?;
+        file.append(&PredefinedMenuItem::separator())?;
+        for (label, action) in [
+            ("Export STL\u{2026}", FileAction::ExportMesh("stl")),
+            ("Export 3MF\u{2026}", FileAction::ExportMesh("3mf")),
+            ("Export STEP\u{2026}", FileAction::Export("step")),
+            ("Export Current View as DXF\u{2026}", FileAction::Command("file.export_view_dxf")),
+            ("Export OBJ\u{2026}", FileAction::Export("obj")),
+            ("Export URDF\u{2026}", FileAction::Export("urdf")),
+            ("Export Design as JSON\u{2026}", FileAction::Export("json")),
+        ] {
+            add(&file, app.tr_label(label), action, None)?;
+        }
+        file.append(&PredefinedMenuItem::separator())?;
+        add(&file, app.tr_label("Design Properties"), FileAction::Command("document.metadata"), None)?;
+        add(&edit, app.tr("ui.undo"), FileAction::Undo, Some(Accelerator::new(Modifiers::META, Code::KeyZ)))?;
+        add(&edit, app.tr("ui.redo"), FileAction::Redo, Some(Accelerator::new(Modifiers::META | Modifiers::SHIFT, Code::KeyZ)))?;
+        add(&window, app.tr_label("Agent Chat"), FileAction::AgentChat, None)?;
+        window.append(&PredefinedMenuItem::separator())?;
+        window.append_items(&[
+            &PredefinedMenuItem::minimize(None),
+            &PredefinedMenuItem::maximize(None),
+            &PredefinedMenuItem::fullscreen(None),
+            &PredefinedMenuItem::separator(),
+            &PredefinedMenuItem::bring_all_to_front(None),
+        ])?;
+        for (action, label) in [
+            ("docs", "Documentation"),
+            ("shortcuts", "Keyboard Shortcuts"),
+            ("messages", "Messages\u{2026}"),
+            ("report", "Report an Issue\u{2026}"),
+            ("crashes", "Crash Reports\u{2026}"),
+            ("install_cli", "Install solidcraft-cli command"),
+        ] {
+            let item = MenuItem::new(app.tr_label(label), true, None);
+            help.append(&item)?;
+            help_actions.push((item, action));
+        }
+        menu.append_items(&[&application, &file, &edit, &window, &help])?;
+        let (sender, events) = sync_channel(64);
+        let ctx = ctx.clone();
+        MenuEvent::set_event_handler(Some(move |event| {
+            let _ = sender.try_send(event);
+            ctx.request_repaint();
+        }));
+        menu.init_for_nsapp();
+        let mut native = Self { menu, actions, help_actions, events, recent, recent_paths: Vec::new() };
+        native.update_recent(app)?;
+        Ok(native)
+    }
+
+    pub fn raw_input_hook(&mut self, app: &mut SolveApp, ctx: &egui::Context, raw: &mut egui::RawInput) {
+        for event in self.events.try_iter().take(64) {
+            if let Some((_, action)) = self.help_actions.iter().find(|(item, _)| item.id() == &event.id) {
+                solidcraft_ui_egui::help::run(app, ctx, action);
+            }
+            if let Some((_, action)) = self.actions.iter().find(|(item, _)| item.id() == &event.id) {
+                if matches!(action, FileAction::Undo | FileAction::Redo) && ctx.egui_wants_keyboard_input() {
+                    raw.events.push(egui::Event::Key {
+                        key: egui::Key::Z,
+                        physical_key: None,
+                        pressed: true,
+                        repeat: false,
+                        modifiers: egui::Modifiers { command: true, mac_cmd: true, shift: matches!(action, FileAction::Redo), ..Default::default() },
+                    });
+                } else {
+                    action.run(app);
+                }
+            }
+        }
+    }
+
+    fn action_enabled(action: &FileAction, app: &SolveApp, ctx: &egui::Context) -> bool {
+        action.menu_enabled(app, ctx.egui_wants_keyboard_input())
+    }
+
+    pub fn tick(&mut self, app: &mut SolveApp, ctx: &egui::Context) {
+        for (item, action) in &self.actions {
+            let enabled = Self::action_enabled(action, app, ctx);
+            if item.is_enabled() != enabled {
+                item.set_enabled(enabled);
+            }
+        }
+        for (item, action) in &self.help_actions {
+            let enabled = solidcraft_ui_egui::help::available(app, action);
+            if item.is_enabled() != enabled {
+                item.set_enabled(enabled);
+            }
+        }
+        if !self.recent_paths.iter().eq(app.home.recent.iter().take(32))
+            && let Err(error) = self.update_recent(app)
+        {
+            app.set_status(format!("Recent designs menu: {error}"), true);
+        }
+    }
+
+    fn update_recent(&mut self, app: &SolveApp) -> muda::Result<()> {
+        while self.recent.remove_at(0).is_some() {}
+        self.actions.retain(|(_, action)| !matches!(action, FileAction::OpenRecent(_) | FileAction::ClearRecent));
+        self.recent_paths = app.home.recent.iter().take(32).cloned().collect();
+        for path in &self.recent_paths {
+            let action = FileAction::OpenRecent(path.clone());
+            let item = MenuItem::new(path, action.enabled(app), None);
+            self.recent.append(&item)?;
+            self.actions.push((item, action));
+        }
+        self.recent.append(&PredefinedMenuItem::separator())?;
+        let clear = MenuItem::new(app.tr("ui.clear_recent"), !self.recent_paths.is_empty(), None);
+        self.recent.append(&clear)?;
+        self.actions.push((clear, FileAction::ClearRecent));
+        Ok(())
+    }
+}
+
+impl Drop for NativeMenu {
+    fn drop(&mut self) {
+        MenuEvent::set_event_handler(None::<fn(MenuEvent)>);
+        self.menu.remove_for_nsapp();
+    }
+}
@@ -0,0 +1,463 @@
+//! The navigation bridge: a 3D input device's own program (a homemade device's driver app) moves
+//! the view over a loopback connection, the way a 3D mouse driver hands its axes to the programs
+//! it supports, so the device emulates no mouse and the pointer stays the user's.
+//!
+//! The device app listens on `127.0.0.1:<port>`; with Preferences › Navigation › "Navigate with a
+//! device app" on (off by default), SolidCraft connects to it, says hello and reads one JSON
+//! object per line (docs/3d-mouse.md). The reader thread only sums the motion; the egui thread
+//! hands it to the view once per frame (`space_mouse::bridge_frame`). A device the app says it
+//! reads is left to it by the 3D mouse reader ([`Claim`]), so the view doesn't move twice.
+
+use std::io::{ErrorKind, Read, Write};
+use std::net::{Ipv4Addr, SocketAddr, TcpStream};
+use std::sync::{Arc, Mutex, MutexGuard};
+use std::time::Duration;
+
+use egui::Context;
+use serde_json::{Value, json};
+use solidcraft_ui_egui::SolveApp;
+use solidcraft_ui_egui::space_mouse::{BRIDGE_VIEWS, BridgeMotion, bridge_frame, bridge_step};
+
+/// The longest line read; a longer one is skipped to its end.
+const MAX_LINE: usize = 4096;
+/// Standard views waiting for the next frame; past this many, more are a flood and dropped.
+const MAX_VIEWS: usize = 8;
+/// The longest name a device app may give for itself or its device, in characters.
+const MAX_NAME: usize = 64;
+/// How long a connection attempt waits.
+const CONNECT_TIMEOUT: Duration = Duration::from_millis(500);
+/// How long a read waits for data before the reader looks at the preferences again.
+const READ_WAKE: Duration = Duration::from_millis(250);
+/// The wait before connecting again when no device app answered or one went away.
+const RETRY_AFTER: Duration = Duration::from_secs(1);
+/// In zoom mode, a motion of this many points along Y is one zoom step: with 8 % a step, the 1 %
+/// a point that a zoom drag moves.
+const POINTS_PER_ZOOM_STEP: f64 = 8.0;
+
+/// What the device's motion drives, as the device app last said (`mode`).
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+enum Mode {
+    #[default]
+    Orbit,
+    Pan,
+    Zoom,
+}
+
+/// What the reader thread and the egui thread share.
+#[derive(Debug, Default)]
+struct Shared {
+    /// The port the preferences ask to connect to; none while the bridge is off.
+    wanted: Option<u16>,
+    /// The device app connected, by the name it gave ("?" until it gives one).
+    connected: Option<String>,
+    /// The device the connected app reads, as it named it: the 3D mouse reader leaves that one alone.
+    device: Option<String>,
+    /// Motion since the egui thread last took it.
+    motion: BridgeMotion,
+    /// Standard views asked for since then.
+    views: Vec<String>,
+}
+
+fn lock(shared: &Mutex<Shared>) -> Option<MutexGuard<'_, Shared>> {
+    shared.lock().ok()
+}
+
+/// A name a device app gave, without control characters and cut to [`MAX_NAME`]; none when empty.
+fn name(value: Option<&Value>) -> Option<String> {
+    let name: String = value?.as_str()?.chars().filter(|c| !c.is_control()).take(MAX_NAME).collect();
+    let name = name.trim();
+    (!name.is_empty()).then(|| name.to_string())
+}
+
+/// A number of a message, finite and in range; none when it isn't one.
+fn number(msg: &Value, key: &str) -> f64 {
+    bridge_step(msg.get(key).and_then(Value::as_f64).unwrap_or(0.0))
+}
+
+/// Takes one line from the device app into `shared`. Lines that aren't a message this version
+/// knows are ignored. Returns whether the view has something new to show.
+fn consume(line: &[u8], mode: &mut Mode, shared: &mut Shared) -> bool {
+    let Ok(msg) = serde_json::from_slice::<Value>(line) else { return false };
+    let add = |shared: &mut Shared, motion: BridgeMotion| {
+        shared.motion = shared.motion.plus(motion);
+        !motion.is_still()
+    };
+    match msg.get("t").and_then(Value::as_str) {
+        Some("axis") => {
+            let (x, y) = (number(&msg, "x"), number(&msg, "y"));
+            let motion = match mode {
+                Mode::Orbit => BridgeMotion { orbit: [x, y], ..Default::default() },
+                Mode::Pan => BridgeMotion { pan: [x, y], ..Default::default() },
+                // Up zooms in, as a zoom drag does.
+                Mode::Zoom => BridgeMotion { zoom: -y / POINTS_PER_ZOOM_STEP, ..Default::default() },
+            };
+            add(shared, motion)
+        }
+        Some("zoom") => add(shared, BridgeMotion { zoom: number(&msg, "d"), ..Default::default() }),
+        Some("mode") => {
+            let on = msg.get("on").and_then(Value::as_bool).unwrap_or(false);
+            *mode = match msg.get("mode").and_then(Value::as_str) {
+                Some("pan") if on => Mode::Pan,
+                Some("zoom") if on => Mode::Zoom,
+                _ => Mode::Orbit,
+            };
+            false
+        }
+        Some("view") => {
+            let view = msg.get("name").and_then(Value::as_str).and_then(|n| BRIDGE_VIEWS.iter().find(|v| **v == n));
+            match view {
+                Some(view) if shared.views.len() < MAX_VIEWS => {
+                    shared.views.push((*view).to_string());
+                    true
+                }
+                _ => false,
+            }
+        }
+        Some("hello") => {
+            shared.connected = name(msg.get("server")).or_else(|| shared.connected.clone());
+            shared.device = name(msg.get("device"));
+            true
+        }
+        _ => false,
+    }
+}
+
+/// Splits what arrives into lines, across reads. A line longer than [`MAX_LINE`] is dropped up to
+/// its newline, so a peer that never sends one can't make the reader hold more than that.
+#[derive(Default)]
+struct Lines {
+    line: Vec<u8>,
+    skipping: bool,
+}
+
+impl Lines {
+    fn feed(&mut self, mut data: &[u8], mut each: impl FnMut(&[u8])) {
+        while !data.is_empty() {
+            let end = data.iter().position(|b| *b == b'\n');
+            let (part, rest) = match end {
+                Some(i) => (data.get(..i).unwrap_or_default(), data.get(i + 1..).unwrap_or_default()),
+                None => (data, &[][..]),
+            };
+            if !self.skipping {
+                let room = (MAX_LINE + 1).saturating_sub(self.line.len());
+                self.line.extend_from_slice(part.get(..room.min(part.len())).unwrap_or_default());
+                if self.line.len() > MAX_LINE {
+                    self.line.clear();
+                    self.skipping = true;
+                }
+            }
+            if end.is_some() {
+                if !self.skipping {
+                    each(self.line.strip_suffix(b"\r").unwrap_or(&self.line));
+                }
+                self.line.clear();
+                self.skipping = false;
+            }
+            data = rest;
+        }
+    }
+}
+
+/// What SolidCraft says first, so the device app knows which program it is driving.
+fn hello() -> Value {
+    json!({"t": "hello", "app": "solidcraft", "version": env!("CARGO_PKG_VERSION")})
+}
+
+/// Reads one connection until the device app closes it, it fails, or the preferences no longer
+/// ask for this port; then forgets what it had.
+fn serve(mut stream: TcpStream, port: u16, ctx: &Context, shared: &Mutex<Shared>) {
+    // Without a read timeout the reader couldn't notice the bridge being switched off.
+    if stream.set_read_timeout(Some(READ_WAKE)).is_err() || writeln!(stream, "{}", hello()).is_err() {
+        return;
+    }
+    let _ = stream.set_nodelay(true);
+    log::info!("navigation bridge: connected to 127.0.0.1:{port}");
+    if let Some(mut shared) = lock(shared) {
+        shared.connected = Some("?".into());
+    }
+    ctx.request_repaint();
+    let (mut lines, mut mode) = (Lines::default(), Mode::default());
+    let mut chunk = [0_u8; 4096];
+    while lock(shared).is_some_and(|shared| shared.wanted == Some(port)) {
+        match stream.read(&mut chunk) {
+            Ok(0) => break,
+            Ok(size) => {
+                let mut news = false;
+                if let Some(mut shared) = lock(shared) {
+                    lines.feed(chunk.get(..size).unwrap_or_default(), |line| news |= consume(line, &mut mode, &mut shared));
+                }
+                if news {
+                    ctx.request_repaint();
+                }
+            }
+            Err(error) if matches!(error.kind(), ErrorKind::WouldBlock | ErrorKind::TimedOut | ErrorKind::Interrupted) => {}
+            Err(error) => {
+                log::info!("navigation bridge: connection lost: {error}");
+                break;
+            }
+        }
+    }
+    if let Some(mut shared) = lock(shared) {
+        *shared = Shared { wanted: shared.wanted, ..Shared::default() };
+    }
+    ctx.request_repaint();
+}
+
+/// Connects to the device app while the preferences ask for it, again whenever it goes away.
+fn reader(ctx: Context, shared: Arc<Mutex<Shared>>) {
+    loop {
+        let Some(port) = lock(&shared).and_then(|shared| shared.wanted) else {
+            std::thread::sleep(READ_WAKE);
+            continue;
+        };
+        if let Ok(stream) = TcpStream::connect_timeout(&SocketAddr::from((Ipv4Addr::LOCALHOST, port)), CONNECT_TIMEOUT) {
+            serve(stream, port, &ctx, &shared);
+        }
+        std::thread::sleep(RETRY_AFTER);
+    }
+}
+
+/// Which 3D mouse the connected device app reads, for the 3D mouse reader to leave alone. Only
+/// the Windows and macOS readers know a device's strings to compare.
+#[derive(Clone)]
+#[cfg_attr(not(any(target_os = "windows", target_os = "macos")), allow(dead_code))]
+pub struct Claim(Arc<Mutex<Shared>>);
+
+#[cfg_attr(not(any(target_os = "windows", target_os = "macos")), allow(dead_code))]
+impl Claim {
+    /// Whether a device with these manufacturer and product strings is the one the connected
+    /// device app reads (its name appears in one, ignoring case).
+    pub fn claims(&self, strings: &[String]) -> bool {
+        let Some(device) = lock(&self.0).and_then(|shared| shared.device.clone()) else { return false };
+        let device = device.to_lowercase();
+        strings.iter().any(|s| s.to_lowercase().contains(&device))
+    }
+}
+
+pub struct NavBridge {
+    shared: Arc<Mutex<Shared>>,
+}
+
+impl NavBridge {
+    pub fn start(ctx: &Context) -> Self {
+        let shared = Arc::new(Mutex::new(Shared::default()));
+        let (worker_ctx, worker_state) = (ctx.clone(), Arc::clone(&shared));
+        if let Err(error) = std::thread::Builder::new().name("solidcraft-nav-bridge".into()).spawn(move || reader(worker_ctx, worker_state)) {
+            log::warn!("navigation bridge: reader could not start: {error}");
+        }
+        Self { shared }
+    }
+
+    #[cfg_attr(not(any(target_os = "windows", target_os = "macos")), allow(dead_code))]
+    pub fn claim(&self) -> Claim {
+        Claim(Arc::clone(&self.shared))
+    }
+
+    /// Each frame: passes the preferences to the reader, and the motion and views since the last
+    /// frame to the view. Motion that arrived while the window had no focus is dropped with it.
+    pub fn tick(&mut self, app: &mut SolveApp, ctx: &Context) {
+        let wanted = Some(app.preferences.nav_bridge_port).filter(|port| app.preferences.nav_bridge_enabled && *port != 0);
+        let Some((motion, views, connected)) = lock(&self.shared).map(|mut shared| {
+            shared.wanted = wanted;
+            (std::mem::take(&mut shared.motion), std::mem::take(&mut shared.views), shared.connected.clone())
+        }) else {
+            return;
+        };
+        app.space_mouse.bridge = connected.filter(|_| wanted.is_some());
+        if !motion.is_still() || !views.is_empty() {
+            bridge_frame(app, ctx, motion, &views);
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::io::{BufRead, BufReader};
+    use std::net::TcpListener;
+    use std::time::Instant;
+
+    fn feed(shared: &mut Shared, mode: &mut Mode, text: &str) -> bool {
+        let mut news = false;
+        Lines::default().feed(text.as_bytes(), |line| news |= consume(line, mode, shared));
+        news
+    }
+
+    #[test]
+    fn axis_motion_orbits_pans_or_zooms_as_the_mode_says() {
+        let (mut shared, mut mode) = (Shared::default(), Mode::default());
+        assert!(feed(&mut shared, &mut mode, "{\"t\":\"axis\",\"x\":3,\"y\":-2}\n{\"t\":\"axis\",\"x\":1.5,\"y\":0}\n"));
+        assert_eq!(shared.motion, BridgeMotion { orbit: [4.5, -2.0], ..Default::default() });
+        feed(&mut shared, &mut mode, "{\"t\":\"mode\",\"mode\":\"pan\",\"on\":true}\n{\"t\":\"axis\",\"x\":5,\"y\":6}\n");
+        assert_eq!(mode, Mode::Pan);
+        assert_eq!(shared.motion.pan, [5.0, 6.0]);
+        feed(&mut shared, &mut mode, "{\"t\":\"mode\",\"mode\":\"zoom\",\"on\":true}\n{\"t\":\"axis\",\"x\":0,\"y\":-16}\n");
+        assert_eq!(shared.motion.zoom, 2.0, "up zooms in, 8 points a step");
+        // Off, whichever mode it names, is back to orbit.
+        feed(&mut shared, &mut mode, "{\"t\":\"mode\",\"mode\":\"pan\",\"on\":false}\n");
+        assert_eq!(mode, Mode::Orbit);
+        // The ring's steps add up with the zoom mode's.
+        feed(&mut shared, &mut mode, "{\"t\":\"zoom\",\"d\":-0.5}\n");
+        assert_eq!(shared.motion.zoom, 1.5);
+    }
+
+    #[test]
+    fn views_are_queued_by_their_known_names_only() {
+        let (mut shared, mut mode) = (Shared::default(), Mode::default());
+        assert!(feed(&mut shared, &mut mode, "{\"t\":\"view\",\"name\":\"iso\"}\n{\"t\":\"view\",\"name\":\"fit\"}\n"));
+        assert!(!feed(&mut shared, &mut mode, "{\"t\":\"view\",\"name\":\"ISO\"}\n{\"t\":\"view\",\"name\":\"../etc\"}\n{\"t\":\"view\"}\n"));
+        assert_eq!(shared.views, ["iso", "fit"]);
+        let flood = "{\"t\":\"view\",\"name\":\"top\"}\n".repeat(100);
+        feed(&mut shared, &mut mode, &flood);
+        assert_eq!(shared.views.len(), MAX_VIEWS);
+    }
+
+    #[test]
+    fn hostile_lines_never_move_the_view_out_of_range() {
+        let (mut shared, mut mode) = (Shared::default(), Mode::default());
+        let lines = [
+            "not json",
+            "{\"t\":\"axis\",\"x\":\"5\",\"y\":null}",
+            "{\"t\":\"axis\",\"x\":1e308,\"y\":-1e308}",
+            "{\"t\":\"axis\",\"x\":1e999}",
+            "{\"t\":\"zoom\",\"d\":[1]}",
+            "{\"t\":42}",
+            "[1,2,3]",
+            "{\"t\":\"mode\",\"mode\":{\"x\":1},\"on\":\"yes\"}",
+            "\u{0}\u{1}\u{2}",
+        ];
+        for line in lines {
+            Lines::default().feed(format!("{line}\n").as_bytes(), |l| {
+                consume(l, &mut mode, &mut shared);
+            });
+        }
+        let limit = solidcraft_ui_egui::space_mouse::BRIDGE_MAX_STEP;
+        let values = shared.motion.orbit.into_iter().chain(shared.motion.pan).chain([shared.motion.zoom]);
+        for value in values {
+            assert!(value.is_finite() && value.abs() <= limit, "{value}");
+        }
+        assert_eq!(mode, Mode::Orbit);
+        // Invalid UTF-8 is no message either.
+        assert!(!consume(&[0xff, 0xfe, b'{', b'}'], &mut mode, &mut shared));
+    }
+
+    #[test]
+    fn lines_split_across_reads_and_long_ones_are_skipped_to_their_end() {
+        let mut got = Vec::new();
+        let mut lines = Lines::default();
+        for part in ["{\"t\":", "\"zoom\"}\r\n{\"a\"", ":1}\n"] {
+            lines.feed(part.as_bytes(), |line| got.push(String::from_utf8_lossy(line).to_string()));
+        }
+        assert_eq!(got, ["{\"t\":\"zoom\"}", "{\"a\":1}"]);
+        got.clear();
+        let long = vec![b'x'; MAX_LINE * 3];
+        lines.feed(&long, |line| got.push(String::from_utf8_lossy(line).to_string()));
+        lines.feed(&long, |line| got.push(String::from_utf8_lossy(line).to_string()));
+        assert!(lines.line.len() <= MAX_LINE + 1, "never holds more than one line");
+        lines.feed(b"tail\nnext\n", |line| got.push(String::from_utf8_lossy(line).to_string()));
+        assert_eq!(got, ["next"], "the long line is dropped to its newline, the next one read");
+    }
+
+    #[test]
+    fn the_device_app_names_itself_and_the_device_it_leaves_alone() {
+        let shared = Arc::new(Mutex::new(Shared::default()));
+        let claim = Claim(Arc::clone(&shared));
+        let strings = ["STMicroelectronics".to_string(), "MAKMOUSE 3D".to_string()];
+        assert!(!claim.claims(&strings), "nothing is claimed before an app says so");
+        let mut mode = Mode::default();
+        if let Ok(mut shared) = shared.lock() {
+            let hello = format!("{{\"t\":\"hello\",\"server\":\"Dev\\u0007App {}\",\"device\":\"makmouse\"}}\n", "x".repeat(200));
+            feed(&mut shared, &mut mode, &hello);
+            assert_eq!(shared.connected.as_deref().map(|n| n.chars().count()), Some(MAX_NAME));
+            assert!(shared.connected.as_deref().is_some_and(|n| n.starts_with("DevApp")));
+        }
+        assert!(claim.claims(&strings), "the name matches ignoring case");
+        assert!(!claim.claims(&["3Dconnexion".to_string(), "SpaceMouse Compact".to_string()]), "another 3D mouse stays the reader's");
+    }
+
+    /// Waits until `check` holds, or fails after a few seconds.
+    fn wait_for(what: &str, mut check: impl FnMut() -> bool) {
+        let deadline = Instant::now() + Duration::from_secs(5);
+        while !check() {
+            assert!(Instant::now() < deadline, "timed out waiting for {what}");
+            std::thread::sleep(Duration::from_millis(10));
+        }
+    }
+
+    #[test]
+    fn a_connection_says_hello_reads_the_stream_and_ends_when_the_bridge_is_switched_off() {
+        let listener = TcpListener::bind((Ipv4Addr::LOCALHOST, 0)).unwrap();
+        let port = listener.local_addr().unwrap().port();
+        let shared = Arc::new(Mutex::new(Shared { wanted: Some(port), ..Default::default() }));
+        let client = TcpStream::connect((Ipv4Addr::LOCALHOST, port)).unwrap();
+        let (mut server, _) = listener.accept().unwrap();
+        let worker = {
+            let shared = Arc::clone(&shared);
+            std::thread::spawn(move || serve(client, port, &Context::default(), &shared))
+        };
+        let mut hello_line = String::new();
+        BufReader::new(server.try_clone().unwrap()).read_line(&mut hello_line).unwrap();
+        let hello: Value = serde_json::from_str(&hello_line).unwrap();
+        assert_eq!((hello["t"].as_str(), hello["app"].as_str()), (Some("hello"), Some("solidcraft")));
+        server
+            .write_all(b"{\"t\":\"hello\",\"server\":\"MAKMOUSE\",\"device\":\"MAKMOUSE\"}\n{\"t\":\"axis\",\"x\":2,\"y\":1}\n{\"t\":\"view\",\"name\":\"top\"}\n")
+            .unwrap();
+        wait_for("the stream", || shared.lock().is_ok_and(|s| s.motion.orbit == [2.0, 1.0] && s.views == ["top"]));
+        assert_eq!(shared.lock().unwrap().connected.as_deref(), Some("MAKMOUSE"));
+        // Switched off: the connection ends and what it had is forgotten.
+        shared.lock().unwrap().wanted = None;
+        worker.join().unwrap();
+        let after = shared.lock().unwrap();
+        assert!(after.connected.is_none() && after.device.is_none() && after.motion.is_still() && after.views.is_empty());
+    }
+
+    #[test]
+    fn a_closed_connection_forgets_the_app() {
+        let listener = TcpListener::bind((Ipv4Addr::LOCALHOST, 0)).unwrap();
+        let port = listener.local_addr().unwrap().port();
+        let shared = Arc::new(Mutex::new(Shared { wanted: Some(port), ..Default::default() }));
+        let client = TcpStream::connect((Ipv4Addr::LOCALHOST, port)).unwrap();
+        let (server, _) = listener.accept().unwrap();
+        let worker = {
+            let shared = Arc::clone(&shared);
+            std::thread::spawn(move || serve(client, port, &Context::default(), &shared))
+        };
+        wait_for("the connection", || shared.lock().is_ok_and(|s| s.connected.is_some()));
+        drop(server);
+        worker.join().unwrap();
+        let after = shared.lock().unwrap();
+        assert_eq!((after.connected.as_deref(), after.wanted), (None, Some(port)), "still wanted, so the reader connects again");
+    }
+
+    #[test]
+    fn each_frame_hands_the_view_the_motion_and_passes_the_preferences_on() {
+        let mut app = SolveApp::new(solidcraft_engine::Session::default(), solidcraft_ui_egui::Services::default());
+        app.home.open = false;
+        let ctx = Context::default();
+        let _ = ctx.run_ui(egui::RawInput { focused: true, ..Default::default() }, |_| {});
+        let mut bridge = NavBridge { shared: Arc::new(Mutex::new(Shared::default())) };
+        let queue = |bridge: &NavBridge| {
+            let mut shared = bridge.shared.lock().unwrap();
+            shared.connected = Some("MAKMOUSE".into());
+            shared.motion = BridgeMotion { orbit: [10.0, 0.0], ..Default::default() };
+        };
+        // Off (the default): nothing is wanted, nothing reaches the view.
+        queue(&bridge);
+        bridge.tick(&mut app, &ctx);
+        assert_eq!(bridge.shared.lock().unwrap().wanted, None);
+        assert!(app.viewport.bridge_motion.is_none() && app.space_mouse.bridge.is_none());
+        // On: the port is passed to the reader and the motion to the view, once.
+        app.preferences.nav_bridge_enabled = true;
+        app.preferences.nav_bridge_port = 9123;
+        queue(&bridge);
+        bridge.tick(&mut app, &ctx);
+        assert_eq!(bridge.shared.lock().unwrap().wanted, Some(9123));
+        assert_eq!(app.space_mouse.bridge.as_deref(), Some("MAKMOUSE"));
+        assert_eq!(app.viewport.bridge_motion.map(|m| m.orbit), Some([10.0, 0.0]));
+        assert!(bridge.shared.lock().unwrap().motion.is_still(), "taken, not handed over twice");
+        // Port 0 is no port.
+        app.preferences.nav_bridge_port = 0;
+        bridge.tick(&mut app, &ctx);
+        assert_eq!(bridge.shared.lock().unwrap().wanted, None);
+    }
+}
@@ -2,13 +2,29 @@
 //! its report descriptor and ids under `/sys/class/hidraw/hidrawN/device/`. Reading them is plain
 //! file I/O, so no udev or hidapi library is needed.

+use std::io::Read;
 use std::path::{Path, PathBuf};
+use std::time::Duration;

 use solidcraft_space_mouse::{Descriptor, Layout};

 const SYSFS: &str = "/sys/class/hidraw";
 const DEV: &str = "/dev";

+/// `O_NONBLOCK` on Linux's common architectures (x86, ARM, RISC-V). The device is opened with it so
+/// a read with nothing to read returns at once and the reader can see whether it should stop.
+pub const O_NONBLOCK: i32 = 0o4000;
+
+/// Opens a hidraw node the way the Direct reader reads it: read-only and non-blocking.
+pub fn open(path: &Path) -> std::io::Result<std::fs::File> {
+    use std::os::unix::fs::OpenOptionsExt;
+    std::fs::OpenOptions::new().read(true).custom_flags(O_NONBLOCK).open(path)
+}
+
+/// How long the reader waits when the device has nothing to say, which is also the most a report
+/// can be delayed.
+const IDLE_POLL: Duration = Duration::from_millis(5);
+
 pub struct Device {
    pub path: PathBuf,
    pub layout: Layout,
@@ -23,6 +39,30 @@ pub fn find() -> Option<Device> {
    names.into_iter().find_map(|name| probe(&Path::new(SYSFS).join(&name), Path::new(DEV).join(&name)))
 }

+/// Hands every report to `publish` until the device is gone (end of file or an error) or `stop`
+/// says so. `source` is non-blocking: when it has nothing, `stop` is asked and the reader waits
+/// [`IDLE_POLL`]. Reports are read and handed over exactly as they were with blocking reads.
+pub fn read_reports(mut source: impl Read, mut publish: impl FnMut(&[u8]), mut stop: impl FnMut() -> bool) {
+    let mut report = [0_u8; super::REPORT_BUFFER_BYTES];
+    loop {
+        match source.read(&mut report) {
+            Ok(0) => return,
+            Ok(size) => publish(report.get(..size).unwrap_or_default()),
+            Err(error) if error.kind() == std::io::ErrorKind::Interrupted => {}
+            Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => {
+                if stop() {
+                    return;
+                }
+                std::thread::sleep(IDLE_POLL);
+            }
+            Err(error) => {
+                log::info!("3D mouse disconnected: {error}");
+                return;
+            }
+        }
+    }
+}
+
 fn probe(sysfs: &Path, path: PathBuf) -> Option<Device> {
    let descriptor = Descriptor::parse(&std::fs::read(sysfs.join("device/report_descriptor")).ok()?);
    // A controller that declares no motion axis (buttons only, say) isn't read.
@@ -42,6 +82,73 @@ fn ids(uevent: &str) -> Option<(u16, u16)> {
 mod tests {
    use super::*;

+    /// A real EACCES, as a user without the udev rule gets: a file of the user's own with no permission
+    /// bits. Skipped for root, which can open anything.
+    #[test]
+    fn a_device_without_permission_is_denied_and_the_daemon_takes_over_within_the_backoff() {
+        use std::os::unix::fs::{MetadataExt, PermissionsExt};
+        if std::fs::metadata("/proc/self").is_ok_and(|meta| meta.uid() == 0) {
+            return;
+        }
+        let dir = std::env::temp_dir().join(format!("sc-hidraw-denied-{}", std::process::id()));
+        std::fs::create_dir_all(&dir).unwrap();
+        let node = dir.join("hidraw0");
+        std::fs::write(&node, [0_u8; 4]).unwrap();
+        std::fs::set_permissions(&node, std::fs::Permissions::from_mode(0o000)).unwrap();
+        let denied = open(&node);
+        std::fs::set_permissions(&node, std::fs::Permissions::from_mode(0o600)).unwrap();
+        assert!(open(&node).is_ok(), "the same node opens once it is readable");
+        std::fs::remove_dir_all(&dir).ok();
+        assert_eq!(denied.err().map(|error| error.kind()), Some(std::io::ErrorKind::PermissionDenied));
+        // The failure is the choice's `since_failed`, with an injected clock: inside the backoff the
+        // daemon is read, whichever driver was asked for; after it the device is tried again.
+        use super::super::{Pick, SpaceMouseDriver, UNREADABLE_RETRY, choose, direct_usable};
+        for wanted in [SpaceMouseDriver::Automatic, SpaceMouseDriver::Spacenavd, SpaceMouseDriver::Direct] {
+            for ago in [Duration::ZERO, Duration::from_secs(29)] {
+                assert_eq!(choose(wanted, true, direct_usable(true, Some(ago), UNREADABLE_RETRY)), Some(Pick::Spacenavd), "{wanted:?} {ago:?}");
+            }
+        }
+        assert_eq!(choose(SpaceMouseDriver::Direct, true, direct_usable(true, Some(UNREADABLE_RETRY), UNREADABLE_RETRY)), Some(Pick::Direct));
+        // And the daemon's own reader delivers over a fake connection.
+        let (mut daemon, client) = std::os::unix::net::UnixStream::pair().unwrap();
+        let mut record = [0_u8; 32];
+        record[4..8].copy_from_slice(&100_i32.to_ne_bytes());
+        std::io::Write::write_all(&mut daemon, &record).unwrap();
+        drop(daemon);
+        let mut seen = 0;
+        super::super::spacenavd::read(client, |_| seen += 1, |_, _| {}, || false, Duration::from_secs(3600));
+        assert_eq!(seen, 1);
+    }
+
+    #[test]
+    fn reports_come_through_idle_gaps_until_the_device_ends_or_a_stop() {
+        use crate::space_mouse::fake::Script;
+        let mut script = Script::new();
+        script.timeout(std::io::ErrorKind::WouldBlock).data(&[1, 2, 3]).timeout(std::io::ErrorKind::WouldBlock).data(&[4]).end();
+        let (mut seen, mut asked) = (Vec::new(), 0);
+        read_reports(
+            script,
+            |report| seen.push(report.to_vec()),
+            || {
+                asked += 1;
+                false
+            },
+        );
+        assert_eq!(seen, [vec![1, 2, 3], vec![4]]);
+        assert_eq!(asked, 2);
+        let mut script = Script::new();
+        script.data(&[1]).timeout(std::io::ErrorKind::WouldBlock).data(&[2]);
+        let mut seen = Vec::new();
+        read_reports(script, |report| seen.push(report.to_vec()), || true);
+        assert_eq!(seen, [vec![1]], "a stop at an idle moment ends the read");
+        // An unplugged device is an error, which ends the read as before.
+        let mut script = Script::new();
+        script.data(&[1]).fail(std::io::ErrorKind::BrokenPipe).data(&[2]);
+        let mut seen = Vec::new();
+        read_reports(script, |report| seen.push(report.to_vec()), || false);
+        assert_eq!(seen, [vec![1]]);
+    }
+
    #[test]
    fn ids_come_from_the_uevent() {
        let wireless = "DRIVER=hid-generic\nHID_ID=0005:0000256F:0000C63A\nHID_NAME=SpaceMouse Wireless BT\n";
@@ -3,7 +3,8 @@
 //! to its clients, so a program that reads the HID device itself bypasses that setup. Over its
 //! socket the daemon sends fixed 32-byte records: eight native-endian `i32`, the first the kind of
 //! record (0 for motion, then x y z rx ry rz and the milliseconds since the last record).
-//! Other records (button presses, from newer daemons also configuration changes) are ignored.
+//! Button records (1 pressed, 2 released, then the button's number from 0) are read too; other
+//! records (from newer daemons also configuration changes) are ignored.
 //!
 //! The socket is plain file I/O, so no library is needed, and it needs no udev rule: the daemon
 //! is what has access to the device.
@@ -11,6 +12,7 @@
 use std::io::Read;
 use std::os::unix::net::UnixStream;
 use std::path::Path;
+use std::time::{Duration, Instant};

 use solidcraft_ui_egui::space_mouse::{Axes, FULL_SCALE};

@@ -23,6 +25,11 @@ const RECORD_BYTES: usize = 32;
 /// sensitivity). Our axes are in the raw HID units of [`FULL_SCALE`].
 const DAEMON_FULL_SCALE: i64 = 500;

+/// Whether the daemon's socket is there, without connecting to it.
+pub fn exists() -> bool {
+    SOCKETS.iter().any(|path| Path::new(path).exists())
+}
+
 pub fn connect() -> Option<UnixStream> {
    SOCKETS.iter().find_map(|path| connect_to(Path::new(path)))
 }
@@ -49,6 +56,22 @@ fn decode(record: &[u8; RECORD_BYTES]) -> Option<Axes> {
    })
 }

+/// The button a button record is about, from 0, and whether it went down; `None` for any other
+/// record, or a button past the 32 a bitmask holds.
+fn button(record: &[u8; RECORD_BYTES]) -> Option<(u32, bool)> {
+    let mut data = [0_i32; 2];
+    for (slot, bytes) in data.iter_mut().zip(record.as_chunks::<4>().0) {
+        *slot = i32::from_ne_bytes(*bytes);
+    }
+    let [kind, number] = data;
+    let number = u32::try_from(number).ok().filter(|&n| n < 32)?;
+    match kind {
+        1 => Some((number, true)),
+        2 => Some((number, false)),
+        _ => None,
+    }
+}
+
 /// A daemon value in our raw units. Out-of-range values stay in `i16`: they are input from another
 /// process.
 fn unit(value: impl Into<i64>) -> i16 {
@@ -56,18 +79,53 @@ fn unit(value: impl Into<i64>) -> i16 {
    i16::try_from(scaled.clamp(i64::from(i16::MIN), i64::from(i16::MAX))).unwrap_or_default()
 }

-/// Hands every motion record to `publish` until the daemon closes the connection or fails. A
-/// partial record at the end is dropped.
-pub fn read(mut stream: impl Read, mut publish: impl FnMut(Axes)) {
+/// Hands every motion record to `publish` and every button record to `pressed` until the daemon
+/// closes the connection or fails, or `stop` says so. A stream with a read timeout
+/// (`set_read_timeout`) times out when the daemon is quiet, which is no record and no disconnect:
+/// `stop` is asked, and the read goes on, with what of a record had arrived kept. `stop` is also asked
+/// at least every `check_every` while records keep arriving, so a daemon that never pauses for that
+/// long (a moving cap sends every few milliseconds) does not keep the reader from noticing that the
+/// device it prefers is back. A partial record at the end is dropped.
+pub fn read(
+    mut stream: impl Read,
+    mut publish: impl FnMut(Axes),
+    mut pressed: impl FnMut(u32, bool),
+    mut stop: impl FnMut() -> bool,
+    check_every: Duration,
+) {
    let mut record = [0_u8; RECORD_BYTES];
+    let mut filled = 0;
+    let mut asked = Instant::now();
    loop {
-        match stream.read_exact(&mut record) {
-            Ok(()) => {
-                if let Some(axes) = decode(&record) {
-                    publish(axes);
+        if asked.elapsed() >= check_every {
+            asked = Instant::now();
+            if stop() {
+                return;
+            }
+        }
+        match stream.read(record.get_mut(filled..).unwrap_or_default()) {
+            Ok(0) => {
+                log::info!("3D mouse: spacenavd connection ended");
+                return;
+            }
+            Ok(size) => {
+                filled += size;
+                if filled == RECORD_BYTES {
+                    filled = 0;
+                    if let Some(axes) = decode(&record) {
+                        publish(axes);
+                    } else if let Some((number, down)) = button(&record) {
+                        pressed(number, down);
+                    }
                }
            }
            Err(error) if error.kind() == std::io::ErrorKind::Interrupted => {}
+            Err(error) if matches!(error.kind(), std::io::ErrorKind::WouldBlock | std::io::ErrorKind::TimedOut) => {
+                asked = Instant::now();
+                if stop() {
+                    return;
+                }
+            }
            Err(error) => {
                log::info!("3D mouse: spacenavd connection ended: {error}");
                return;
@@ -113,6 +171,10 @@ mod tests {
    fn other_records_and_hostile_values_are_harmless() {
        // A button record (kind 1, press) and one of an unknown kind are not motion.
        assert_eq!(decode(&record([1, 0, 1, 0, 0, 0, 0, 0])), None);
+        // Nor are hostile button numbers a button.
+        assert_eq!(button(&record([1, -1, 0, 0, 0, 0, 0, 0])), None);
+        assert_eq!(button(&record([1, i32::MAX, 0, 0, 0, 0, 0, 0])), None);
+        assert_eq!(button(&record([7, 3, 0, 0, 0, 0, 0, 0])), None);
        assert_eq!(decode(&record([7, 500, 500, 500, 500, 500, 500, 0])), None);
        // Nothing overflows on the extremes of `i32`.
        let extreme = decode(&record([0, i32::MIN, i32::MIN, i32::MAX, i32::MAX, i32::MIN, i32::MIN, -1]));
@@ -126,14 +188,84 @@ mod tests {
        let (mut daemon, client) = UnixStream::pair().expect("a socket pair");
        let mut bytes = Vec::new();
        bytes.extend(record([0, 100, 0, 0, 0, 0, 0, 8]));
-        bytes.extend(record([2, 1, 0, 0, 0, 0, 0, 0])); // a button release: skipped
+        bytes.extend(record([1, 4, 0, 0, 0, 0, 0, 0])); // button 4 down
+        bytes.extend(record([2, 4, 0, 0, 0, 0, 0, 0])); // and up
+        bytes.extend(record([1, 40, 0, 0, 0, 0, 0, 0])); // past the 32 a bitmask holds: skipped
        bytes.extend(record([0, 0, 0, 0, 0, 0, 0, 900]));
        bytes.extend([1, 2, 3]); // the daemon went away mid-record
        daemon.write_all(&bytes).expect("written");
        drop(daemon);
-        let mut seen = Vec::new();
-        read(client, |axes| seen.push(axes.translation));
+        let (mut seen, mut buttons) = (Vec::new(), Vec::new());
+        read(client, |axes| seen.push(axes.translation), |number, down| buttons.push((number, down)), || false, Duration::from_secs(3600));
        assert_eq!(seen, [[70, 0, 0], [0, 0, 0]]);
+        assert_eq!(buttons, [(4, true), (4, false)]);
+    }
+
+    #[test]
+    fn a_quiet_daemon_times_out_without_losing_the_record_it_was_sending() {
+        use crate::space_mouse::fake::Script;
+        use std::io::ErrorKind::{TimedOut, WouldBlock};
+        let bytes = record([0, 100, 0, 0, 0, 0, 0, 8]);
+        let mut script = Script::new();
+        script.timeout(WouldBlock).data(&bytes[..10]).timeout(TimedOut).timeout(WouldBlock).data(&bytes[10..]).timeout(WouldBlock).end();
+        let (mut seen, mut asked) = (Vec::new(), 0);
+        read(
+            script,
+            |axes| seen.push(axes.translation),
+            |_, _| {},
+            || {
+                asked += 1;
+                false
+            },
+            Duration::from_secs(3600),
+        );
+        assert_eq!(seen, [[70, 0, 0]]);
+        assert_eq!(asked, 4, "each timeout asks whether to stop");
+    }
+
+    #[test]
+    fn a_stop_ends_the_read_at_the_next_timeout_only() {
+        use crate::space_mouse::fake::Script;
+        let bytes = record([0, 100, 0, 0, 0, 0, 0, 8]);
+        let mut script = Script::new();
+        script.data(&bytes).timeout(std::io::ErrorKind::WouldBlock).data(&bytes);
+        let mut seen = 0;
+        read(script, |_| seen += 1, |_, _| {}, || true, Duration::from_secs(3600));
+        assert_eq!(seen, 1, "the record before the timeout arrived; the one after never was read");
+    }
+
+    /// A daemon that never goes quiet (a moving cap sends every few milliseconds) is still asked whether to
+    /// stop, at the interval given, so the reader can go back to a device that returned.
+    #[test]
+    fn a_busy_daemon_is_asked_whether_to_stop_on_a_timer() {
+        // Ends by itself after half a second, so a read that never asks fails the assertion below
+        // instead of hanging the test.
+        struct Busy(Instant);
+        impl Read for Busy {
+            fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
+                if self.0.elapsed() > Duration::from_millis(500) {
+                    return Ok(0);
+                }
+                std::thread::sleep(Duration::from_millis(2));
+                let bytes = record([0, 100, 0, 0, 0, 0, 0, 8]);
+                let size = bytes.len().min(buf.len());
+                buf[..size].copy_from_slice(&bytes[..size]);
+                Ok(size)
+            }
+        }
+        let (mut seen, mut asked) = (0, 0);
+        read(
+            Busy(Instant::now()),
+            |_| seen += 1,
+            |_, _| {},
+            || {
+                asked += 1;
+                asked == 3
+            },
+            Duration::from_millis(10),
+        );
+        assert_eq!(asked, 3, "asked on the timer although no read ever timed out");
+        assert!(seen > 3, "records kept coming meanwhile: {seen}");
    }

    #[test]
@@ -0,0 +1,172 @@
+//! Windows: finding 3D mice without asking any other device anything (#2614).
+//!
+//! hidapi's enumeration opens every HID interface and reads its serial number, manufacturer and
+//! product strings: on USB, three control requests to every keyboard, mouse and touchscreen. The
+//! reader repeated it every two seconds while no 3D mouse was plugged in, and on some machines the
+//! keyboard then kept dropping off the bus and the cursor jumped. Plug and Play already names each
+//! interface's top-level usage in its hardware IDs (`HID_DEVICE_UP:0001_U:0008`: Generic Desktop,
+//! Multi-Axis Controller), so the reader asks it, which sends nothing to any device, and opens only
+//! the interfaces that are 3D mice.
+//!
+//! The configuration manager has no safe API, hence the `unsafe_code` allowance on this module
+//! (the app crate denies it; see `native_crash.rs`).
+#![allow(unsafe_code)]
+
+use std::ffi::CString;
+use std::ptr::{null, null_mut};
+
+use windows_sys::Win32::Devices::DeviceAndDriverInstallation::{
+    CM_GET_DEVICE_INTERFACE_LIST_PRESENT, CM_Get_DevNode_PropertyW, CM_Get_Device_Interface_List_SizeW, CM_Get_Device_Interface_ListW,
+    CM_Get_Device_Interface_PropertyW, CM_LOCATE_DEVNODE_NORMAL, CM_Locate_DevNodeW, CONFIGRET, CR_BUFFER_SMALL, CR_SUCCESS,
+};
+use windows_sys::Win32::Devices::HumanInterfaceDevice::GUID_DEVINTERFACE_HID;
+use windows_sys::Win32::Devices::Properties::{
+    DEVPKEY_Device_HardwareIds, DEVPKEY_Device_InstanceId, DEVPROP_TYPE_STRING, DEVPROP_TYPE_STRING_LIST, DEVPROPTYPE,
+};
+use windows_sys::Win32::Foundation::DEVPROPKEY;
+
+/// The hardware ID Windows gives a top-level collection with the Generic Desktop page's
+/// Multi-Axis Controller usage.
+const MULTI_AXIS_CONTROLLER: &str = "HID_DEVICE_UP:0001_U:0008";
+/// Largest property read, in bytes: hardware IDs are a few hundred.
+const MAX_PROPERTY_BYTES: u32 = 64 * 1024;
+/// Tries at reading the interface list, which can grow between asking its size and reading it.
+const LIST_TRIES: usize = 4;
+
+/// The paths of the present HID interfaces whose top-level collection is a multi-axis controller.
+pub fn multi_axis_controllers() -> Vec<CString> {
+    interfaces()
+        .into_iter()
+        .filter(|path| {
+            let Some(instance) = interface_strings(path, &DEVPKEY_Device_InstanceId).and_then(|ids| ids.into_iter().next()) else {
+                return false;
+            };
+            devnode_strings(&instance, &DEVPKEY_Device_HardwareIds).is_some_and(|ids| is_multi_axis(&ids))
+        })
+        .filter_map(|path| CString::new(path).ok())
+        .collect()
+}
+
+/// Whether a device with these hardware IDs is a multi-axis controller.
+fn is_multi_axis(hardware_ids: &[String]) -> bool {
+    hardware_ids.iter().any(|id| id.eq_ignore_ascii_case(MULTI_AXIS_CONTROLLER))
+}
+
+/// The strings of a nul-separated list (`REG_MULTI_SZ`, or one string), without empty ones.
+fn split_multi_sz(buffer: &[u16]) -> Vec<String> {
+    buffer.split(|c| *c == 0).filter(|s| !s.is_empty()).map(String::from_utf16_lossy).collect()
+}
+
+/// `s` as a nul-terminated wide string.
+fn wide(s: &str) -> Vec<u16> {
+    s.encode_utf16().chain(std::iter::once(0)).collect()
+}
+
+/// The paths of the present HID interfaces.
+fn interfaces() -> Vec<String> {
+    for _ in 0..LIST_TRIES {
+        let mut len = 0u32;
+        // SAFETY: `len` is a valid place for the size; the class GUID is a static; no device filter.
+        let sized = unsafe { CM_Get_Device_Interface_List_SizeW(&mut len, &GUID_DEVINTERFACE_HID, null(), CM_GET_DEVICE_INTERFACE_LIST_PRESENT) };
+        if sized != CR_SUCCESS || len == 0 {
+            return Vec::new();
+        }
+        let mut buffer = vec![0u16; len as usize];
+        // SAFETY: `buffer` holds `len` wide characters, the length the call is given.
+        let listed =
+            unsafe { CM_Get_Device_Interface_ListW(&GUID_DEVINTERFACE_HID, null(), buffer.as_mut_ptr(), len, CM_GET_DEVICE_INTERFACE_LIST_PRESENT) };
+        match listed {
+            CR_SUCCESS => return split_multi_sz(&buffer),
+            CR_BUFFER_SMALL => continue,
+            _ => return Vec::new(),
+        }
+    }
+    Vec::new()
+}
+
+/// A string or string-list property, read by `get` (property type, buffer, its size in bytes) in
+/// two calls: the size, then the value.
+fn property_strings(get: impl Fn(*mut DEVPROPTYPE, *mut u8, *mut u32) -> CONFIGRET) -> Option<Vec<String>> {
+    let mut kind: DEVPROPTYPE = 0;
+    let mut size = 0u32;
+    if get(&mut kind, null_mut(), &mut size) != CR_BUFFER_SMALL || size == 0 || size > MAX_PROPERTY_BYTES {
+        return None;
+    }
+    let mut buffer = vec![0u16; (size as usize).div_ceil(2)];
+    let mut size = (buffer.len() * 2) as u32;
+    if get(&mut kind, buffer.as_mut_ptr().cast(), &mut size) != CR_SUCCESS || (kind != DEVPROP_TYPE_STRING && kind != DEVPROP_TYPE_STRING_LIST) {
+        return None;
+    }
+    Some(split_multi_sz(&buffer))
+}
+
+/// A string property of the device interface at `path`.
+fn interface_strings(path: &str, key: &DEVPROPKEY) -> Option<Vec<String>> {
+    let path = wide(path);
+    property_strings(|kind, buffer, size| {
+        // SAFETY: `path` is nul-terminated and outlives the call; `buffer` is null (asking the size)
+        // or holds `*size` bytes, as `property_strings` sets up.
+        unsafe { CM_Get_Device_Interface_PropertyW(path.as_ptr(), key, kind, buffer, size, 0) }
+    })
+}
+
+/// A string property of the device with instance ID `instance`.
+fn devnode_strings(instance: &str, key: &DEVPROPKEY) -> Option<Vec<String>> {
+    let instance = wide(instance);
+    let mut devnode = 0u32;
+    // SAFETY: `instance` is nul-terminated and outlives the call; `devnode` is a valid place for the result.
+    if unsafe { CM_Locate_DevNodeW(&mut devnode, instance.as_ptr(), CM_LOCATE_DEVNODE_NORMAL) } != CR_SUCCESS {
+        return None;
+    }
+    property_strings(|kind, buffer, size| {
+        // SAFETY: `buffer` is null (asking the size) or holds `*size` bytes, as `property_strings` sets up.
+        unsafe { CM_Get_DevNode_PropertyW(devnode, key, kind, buffer, size, 0) }
+    })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    /// The hardware IDs Windows gives a wired 3Dconnexion device's motion interface, and a
+    /// keyboard's: only the first is a multi-axis controller.
+    #[test]
+    fn only_the_multi_axis_usage_is_a_3d_mouse() {
+        let ids = |list: &[&str]| list.iter().map(|s| s.to_string()).collect::<Vec<_>>();
+        let space_mouse = ids(&["HID\\VID_256F&PID_C635&REV_0437&MI_00", "HID\\VID_256F&UP:0001_U:0008", "HID_DEVICE_UP:0001_U:0008", "HID_DEVICE"]);
+        let keyboard = ids(&[
+            "HID\\VID_046D&PID_C31C&REV_6400&MI_00",
+            "HID\\VID_046D&UP:0001_U:0006",
+            "HID_DEVICE_SYSTEM_KEYBOARD",
+            "HID_DEVICE_UP:0001_U:0006",
+            "HID_DEVICE",
+        ]);
+        let vendor = ids(&["HID\\VID_256F&UP:FF00_U:0001", "HID_DEVICE_UP:FF00_U:0001", "HID_DEVICE_UPR:FF00-FFFF", "HID_DEVICE"]);
+        assert!(is_multi_axis(&space_mouse));
+        assert!(is_multi_axis(&ids(&["hid_device_up:0001_u:0008"])), "IDs compare without regard to case");
+        assert!(!is_multi_axis(&keyboard) && !is_multi_axis(&vendor) && !is_multi_axis(&[]));
+    }
+
+    #[test]
+    fn nul_separated_lists_split_into_their_strings() {
+        let buffer: Vec<u16> = "a\\b\0HID_DEVICE\0\0".encode_utf16().collect();
+        assert_eq!(split_multi_sz(&buffer), ["a\\b", "HID_DEVICE"]);
+        assert_eq!(split_multi_sz(&wide("one")), ["one"]);
+        assert!(split_multi_sz(&[0, 0]).is_empty() && split_multi_sz(&[]).is_empty());
+    }
+
+    /// The scan asks Plug and Play only: on any machine it returns, and every path it returns is a
+    /// present HID interface whose hardware IDs name the multi-axis usage.
+    #[test]
+    fn the_scan_returns_only_multi_axis_interfaces() {
+        let found = multi_axis_controllers();
+        let all = interfaces();
+        for path in &found {
+            let path = path.to_str().unwrap_or_default();
+            assert!(all.iter().any(|p| p == path), "{path}");
+            let instance = interface_strings(path, &DEVPKEY_Device_InstanceId).and_then(|ids| ids.into_iter().next()).unwrap_or_default();
+            assert!(devnode_strings(&instance, &DEVPKEY_Device_HardwareIds).is_some_and(|ids| is_multi_axis(&ids)), "{path}");
+        }
+        eprintln!("{} HID interfaces present, {} multi-axis controllers", all.len(), found.len());
+    }
+}
@@ -8,8 +8,9 @@
 //!   row the next launch starts in safe mode by itself.
 //! - **Safe mode** (`--safe-mode` or `SOLIDCRAFT_SAFE_MODE=1`): default settings (the saved ones
 //!   are left untouched), no recovery offer, the software renderer and CPU meshing.
-//! - **No usable graphics device**: one retry on the software renderer
-//!   (`SOLIDCRAFT_RENDERER=cpu`), then a message box saying what failed and what to try.
+//! - **A renderer that cannot start**: on Windows, try the remaining graphics APIs in order,
+//!   then the software renderer (`SOLIDCRAFT_RENDERER=cpu`). An explicit `WGPU_BACKEND` fails
+//!   cleanly without switching. Exhausted retries show a message box with the error.

 use std::path::{Path, PathBuf};

@@ -21,6 +22,25 @@ pub const RENDERER_ENV: &str = "SOLIDCRAFT_RENDERER";
 pub const FAILED_STARTS_FOR_SAFE_MODE: u32 = 2;
 const MARKER: &str = "starting";

+/// Explicit application-settings isolation for side-by-side builds and native UI
+/// acceptance. A supplied invalid path refuses startup rather than falling back
+/// to the user's ordinary settings. No directory is read or created here.
+pub fn settings_directory(override_path: Option<&std::ffi::OsStr>, default: Option<PathBuf>) -> Result<Option<PathBuf>, String> {
+    match override_path {
+        None => Ok(default),
+        Some(raw) => {
+            let path = PathBuf::from(raw);
+            if raw.is_empty() || !path.is_absolute() {
+                return Err("SOLIDCRAFT_SETTINGS_DIR must be a nonempty absolute directory path".into());
+            }
+            if path.exists() && !path.is_dir() {
+                return Err("SOLIDCRAFT_SETTINGS_DIR names a file, not a directory".into());
+            }
+            Ok(Some(path))
+        }
+    }
+}
+
 /// Whether an environment value switches something on.
 pub fn env_on(v: Option<&str>) -> bool {
    v.map(str::trim).is_some_and(|v| !v.is_empty() && v != "0" && !v.eq_ignore_ascii_case("false"))
@@ -110,6 +130,48 @@ pub fn pick_cpu_adapter(adapters: &[eframe::wgpu::Adapter], surface: Option<&efr
        })
 }

+/// Adapter properties used to choose a card without opening a device.
+#[derive(Clone, Debug)]
+pub struct AdapterChoice {
+    pub name: String,
+    pub compatible: bool,
+}
+
+/// Choose only surface-compatible adapters. Names saved in preferences are exact; the
+/// environment override follows wgpu's case-insensitive substring convention.
+/// No match leaves selection to the normal wgpu request.
+pub fn choose_adapter(adapters: &[AdapterChoice], environment: Option<&str>, preference: Option<&str>) -> Option<usize> {
+    // wgpu's environment helper panics on a missing name; an override must remain recoverable.
+    let compatible = || adapters.iter().enumerate().filter(|(_, a)| a.compatible);
+    if let Some(name) = environment.filter(|s| !s.is_empty()) {
+        let name = name.to_lowercase();
+        if let Some((index, _)) = compatible().find(|(_, a)| a.name.to_lowercase().contains(&name)) {
+            return Some(index);
+        }
+    }
+    if let Some(name) = preference.filter(|s| !s.is_empty())
+        && let Some((index, _)) = compatible().find(|(_, a)| a.name == name)
+    {
+        return Some(index);
+    }
+    None
+}
+
+/// Leave Automatic on wgpu's normal request path; named choices may defer to it too.
+pub fn configure_adapter(setup: &mut eframe::egui_wgpu::WgpuSetupCreateNew, cpu: bool, environment: Option<String>, preference: Option<String>) {
+    if cpu {
+        setup.native_adapter_selector = Some(std::sync::Arc::new(|adapters, surface| pick_cpu_adapter(adapters, surface).map(Some)));
+    } else if environment.as_deref().is_some_and(|s| !s.is_empty()) || preference.as_deref().is_some_and(|s| !s.is_empty()) {
+        setup.native_adapter_selector = Some(std::sync::Arc::new(move |adapters, surface| {
+            let choices: Vec<_> = adapters
+                .iter()
+                .map(|a| AdapterChoice { name: a.get_info().name, compatible: surface.is_none_or(|s| a.is_surface_supported(s)) })
+                .collect();
+            Ok(choose_adapter(&choices, environment.as_deref(), preference.as_deref()).and_then(|i| adapters.get(i)).cloned())
+        }));
+    }
+}
+
 /// `WGPU_BACKEND`: when set, wgpu picks the backends from it and the order below is not used.
 pub const WGPU_BACKEND_ENV: &str = "WGPU_BACKEND";

@@ -157,6 +219,34 @@ pub fn choose_backends(
    Some(WINDOWS_ORDER.into_iter().find(|b| has_hardware(*b)).unwrap_or(Backends::DX12))
 }

+/// Internal, process-local retry choice; never written to the graphics preference.
+pub const RETRY_BACKEND_ENV: &str = "SOLIDCRAFT_STARTUP_BACKEND";
+/// Why this launch is using a fallback, carried to the new process for status and Preferences.
+pub const FALLBACK_NOTE_ENV: &str = "SOLIDCRAFT_GRAPHICS_FALLBACK";
+
+/// A handled startup failure tries each remaining Windows API once, then software rendering.
+/// An explicit environment choice is final, including when software rendering was requested.
+pub fn fallback_backend(windows: bool, explicit: bool, cpu: bool, failed: eframe::wgpu::Backends) -> Option<&'static str> {
+    if explicit || cpu {
+        return None;
+    }
+    if windows {
+        let last = WINDOWS_ORDER.iter().rposition(|backend| failed.intersects(*backend));
+        if let Some(next) = last.and_then(|i| WINDOWS_ORDER.get(i + 1)) {
+            return Some(if *next == eframe::wgpu::Backends::VULKAN { "vulkan" } else { "gl" });
+        }
+    }
+    Some("cpu")
+}
+
+/// Keep driver diagnostics on one bounded line, including across the finite retry chain.
+pub fn fallback_note(previous: &str, failed: eframe::wgpu::Backends, next: &str, error: &str) -> String {
+    let previous: String = previous.chars().take(2048).collect();
+    let error: String = error.chars().take(1024).collect();
+    let line = format!("{previous} Graphics fallback: {failed:?} failed ({error}); trying {next}.");
+    line.split_whitespace().collect::<Vec<_>>().join(" ").chars().take(4096).collect()
+}
+
 /// The device feature for a 32-bit float depth buffer with a stencil (reversed depth, #1434).
 pub const FLOAT_DEPTH_STENCIL: eframe::wgpu::Features = eframe::wgpu::Features::DEPTH32FLOAT_STENCIL8;

@@ -165,7 +255,7 @@ pub const FLOAT_DEPTH_STENCIL: eframe::wgpu::Features = eframe::wgpu::Features::
 /// asks for a float one only when whichever it picks has it.
 pub fn float_depth_everywhere(options: &eframe::egui_wgpu::WgpuConfiguration) -> bool {
    let eframe::egui_wgpu::WgpuSetup::CreateNew(setup) = &options.wgpu_setup else { return false };
-    let mut desc = eframe::wgpu::InstanceDescriptor::new_without_display_handle_from_env();
+    let mut desc = solidcraft_gpu::instance_descriptor_from_env();
    desc.backends = setup.instance_descriptor.backends;
    let instance = eframe::wgpu::Instance::new(desc);
    let adapters = pollster::block_on(instance.enumerate_adapters(setup.instance_descriptor.backends));
@@ -182,6 +272,7 @@ pub fn has_hardware_adapter(backends: eframe::wgpu::Backends) -> bool {
    let mut desc = eframe::wgpu::InstanceDescriptor::new_without_display_handle();
    desc.backends = backends;
    desc.flags = eframe::wgpu::InstanceFlags::from_build_config().with_env();
+    desc.backend_options.dx12.shader_compiler = solidcraft_gpu::dx12_compiler();
    let instance = eframe::wgpu::Instance::new(desc);
    let adapters = pollster::block_on(instance.enumerate_adapters(backends));
    let found: Vec<String> = adapters.iter().map(|a| format!("{} ({:?})", a.get_info().name, a.get_info().device_type)).collect();
@@ -189,6 +280,37 @@ pub fn has_hardware_adapter(backends: eframe::wgpu::Backends) -> bool {
    adapters.iter().any(|a| a.get_info().device_type != eframe::wgpu::DeviceType::Cpu)
 }

+/// The environment variable that switches wgpu's indirect-call validation on or off.
+pub const INDIRECT_VALIDATION_ENV: &str = "WGPU_VALIDATION_INDIRECT_CALL";
+
+/// The instance flags for the window. wgpu's indirect-call validation compiles a compute shader
+/// when the device is created, and on Intel Macs (macOS 12 with Intel Iris graphics, #3024,
+/// #3080, #4605) the Metal compiler refuses it: the device is lost and the window never opens.
+/// So on an Intel Mac the validation is left off, unless the user turned it on or off with
+/// `WGPU_VALIDATION_INDIRECT_CALL` themselves.
+pub fn window_instance_flags(flags: eframe::wgpu::InstanceFlags, intel_mac: bool, env: Option<&str>) -> eframe::wgpu::InstanceFlags {
+    if intel_mac && env.map(str::trim).is_none_or(str::is_empty) { flags - eframe::wgpu::InstanceFlags::VALIDATION_INDIRECT_CALL } else { flags }
+}
+
+/// Windows with OpenGL: the window keeps the system title bar (#2063). The window without OS
+/// decorations keeps its caption style while having no frame, and some OpenGL drivers (older
+/// Intel HD/UHD) then show the picture a caption's height lower than the window, so it no longer
+/// lines up with the pointer. Direct3D 12 and Vulkan draw it in place and keep the application bar
+/// as the title bar. `backends` are the ones wgpu starts: OpenGL alone is decided before the
+/// window opens.
+pub fn system_title_bar(windows: bool, backends: eframe::wgpu::Backends) -> bool {
+    use eframe::wgpu::Backends;
+    windows && backends.contains(Backends::GL) && !backends.intersects(Backends::DX12 | Backends::VULKAN)
+}
+
+/// The `--max-file-size` value (#4086): a size such as `2GB` or `1500MB`, at most 16 GB. It raises
+/// the largest STEP/import and design file this run reads, over the saved preference, without
+/// saving anything. A missing or bad value stops the start with this error.
+pub fn max_file_size(value: Option<&str>) -> Result<u64, String> {
+    let value = value.ok_or("--max-file-size needs a size, for example --max-file-size 2GB")?;
+    solidcraft_engine::io::limits::parse_flag(value).map_err(|e| format!("--max-file-size: {e}"))
+}
+
 /// The message shown when no window could be opened at all.
 pub fn no_window_message(error: &str, settings: Option<&Path>) -> String {
    let folder = settings.map(|d| d.display().to_string()).unwrap_or_else(|| "the SolidCraft settings folder".into());
@@ -207,6 +329,58 @@ pub fn no_window_message(error: &str, settings: Option<&Path>) -> String {
 mod tests {
    use super::*;

+    fn cards() -> Vec<AdapterChoice> {
+        ["Integrated", "Discrete small", "Discrete large"].into_iter().map(|name| AdapterChoice { name: name.into(), compatible: true }).collect()
+    }
+
+    #[test]
+    fn max_file_size_parses_sizes_and_refuses_bad_ones() {
+        assert_eq!(max_file_size(Some("2GB")), Ok(2 << 30));
+        assert_eq!(max_file_size(Some("1500MB")), Ok(1500 << 20));
+        for bad in [None, Some(""), Some("2"), Some("17GB"), Some("lots"), Some("-1GB")] {
+            let error = max_file_size(bad).unwrap_err();
+            assert!(error.contains("--max-file-size"), "{bad:?}: {error}");
+        }
+    }
+
+    #[test]
+    fn adapter_names_environment_override_and_missing_card_fallback() {
+        let cards = cards();
+        assert_eq!(choose_adapter(&cards, None, Some("Discrete small")), Some(1));
+        assert_eq!(choose_adapter(&cards, Some("LARGE"), Some("Discrete small")), Some(2));
+        assert_eq!(choose_adapter(&cards, None, Some("removed")), None);
+        assert_eq!(choose_adapter(&cards, Some("missing"), Some("Discrete small")), Some(1));
+        assert_eq!(choose_adapter(&cards, Some(""), Some("Discrete small")), Some(1));
+        assert_eq!(choose_adapter(&cards, None, Some("Discrete")), None, "saved names are exact");
+    }
+
+    #[test]
+    fn automatic_adapter_leaves_selection_to_wgpu() {
+        let mut cards = cards();
+        assert_eq!(choose_adapter(&cards, None, None), None);
+        assert_eq!(choose_adapter(&cards, Some(""), Some("")), None);
+        cards[2].compatible = false;
+        assert_eq!(choose_adapter(&cards, Some("large"), Some("Discrete large")), None);
+        assert_eq!(choose_adapter(&cards, Some("small"), None), Some(1));
+        assert_eq!(choose_adapter(&[], None, None), None);
+    }
+
+    #[test]
+    fn automatic_adapter_preserves_the_previous_request_configuration() {
+        use eframe::egui_wgpu::WgpuSetupCreateNew;
+        let previous = WgpuSetupCreateNew::without_display_handle();
+        for preference in [None, Some(String::new())] {
+            let mut setup = WgpuSetupCreateNew::without_display_handle();
+            configure_adapter(&mut setup, false, None, preference);
+            assert!(setup.native_adapter_selector.is_none(), "Automatic must use the normal wgpu request");
+            assert_eq!(setup.power_preference, previous.power_preference);
+            assert_eq!(setup.instance_descriptor.backends, previous.instance_descriptor.backends);
+        }
+        let mut setup = WgpuSetupCreateNew::without_display_handle();
+        configure_adapter(&mut setup, false, Some("missing".into()), Some("removed".into()));
+        assert!(setup.native_adapter_selector.unwrap()(&[], None).unwrap().is_none(), "missing names must use the normal request too");
+    }
+
    fn scratch(name: &str) -> PathBuf {
        let d = std::env::temp_dir().join(format!("solidcraft-startup-{name}-{}", std::process::id()));
        let _ = std::fs::remove_dir_all(&d);
@@ -214,6 +388,32 @@ mod tests {
        d
    }

+    #[test]
+    fn isolated_settings_are_explicit_absolute_and_never_fall_back() {
+        let default = std::env::temp_dir().join("ordinary-settings");
+        assert_eq!(settings_directory(None, Some(default.clone())).unwrap(), Some(default.clone()));
+        let selected = std::env::temp_dir().join("solidcraft-isolated-settings-fixture");
+        assert_eq!(settings_directory(Some(selected.as_os_str()), Some(default.clone())).unwrap(), Some(selected));
+        for raw in ["", "relative/settings", "../ordinary"] {
+            assert!(settings_directory(Some(std::ffi::OsStr::new(raw)), Some(default.clone())).is_err());
+        }
+        let file = std::env::current_exe().unwrap();
+        assert!(settings_directory(Some(file.as_os_str()), Some(default)).is_err());
+    }
+
+    #[test]
+    fn intel_macs_start_without_indirect_call_validation() {
+        use eframe::wgpu::InstanceFlags as F;
+        let on = F::VALIDATION | F::VALIDATION_INDIRECT_CALL;
+        assert_eq!(window_instance_flags(on, true, None), F::VALIDATION);
+        assert_eq!(window_instance_flags(on, true, Some("  ")), F::VALIDATION);
+        // The user's own choice stands, on or off.
+        assert_eq!(window_instance_flags(on, true, Some("1")), on);
+        assert_eq!(window_instance_flags(F::VALIDATION, true, Some("0")), F::VALIDATION);
+        // Every other machine keeps what it had.
+        assert_eq!(window_instance_flags(on, false, None), on);
+    }
+
    #[test]
    fn switches_read_from_the_environment() {
        assert!(env_on(Some("1")) && env_on(Some("yes")) && !env_on(Some("0")) && !env_on(Some(" ")) && !env_on(None) && !env_on(Some("false")));
@@ -290,6 +490,54 @@ mod tests {
        assert_eq!(choose_backends(true, false, false, Some(""), probe(&[Backends::GL])), Some(Backends::GL));
    }

+    #[test]
+    fn failed_windows_backends_fall_back_in_order_and_stop_after_software() {
+        use eframe::wgpu::Backends as B;
+        assert_eq!(fallback_backend(true, false, false, B::DX12), Some("vulkan"));
+        assert_eq!(fallback_backend(true, false, false, B::VULKAN), Some("gl"));
+        assert_eq!(fallback_backend(true, false, false, B::GL), Some("cpu"));
+        assert_eq!(fallback_backend(true, false, true, B::DX12), None);
+        assert_eq!(fallback_backend(true, false, false, B::DX12 | B::VULKAN), Some("gl"));
+        assert_eq!(fallback_backend(false, false, false, B::VULKAN), Some("cpu"));
+        let note = fallback_note("", B::DX12, "vulkan", "egui_pipeline\n0x80070057");
+        assert!(note.contains("egui_pipeline 0x80070057") && note.contains("vulkan") && !note.contains('\n'));
+        let long = fallback_note(&"x".repeat(5000), B::VULKAN, "gl", &"y".repeat(5000));
+        assert!(long.chars().count() <= 4096 && long.ends_with("trying gl."));
+    }
+
+    #[test]
+    fn explicit_backend_failure_never_switches_api_or_retries_software() {
+        use eframe::wgpu::Backends as B;
+        for windows in [false, true] {
+            for cpu in [false, true] {
+                for backend in [B::DX12, B::VULKAN, B::GL, B::all()] {
+                    assert_eq!(fallback_backend(windows, true, cpu, backend), None);
+                    let mut probed = false;
+                    assert_eq!(
+                        choose_backends(windows, true, cpu, Some("vulkan"), |_| {
+                            probed = true;
+                            false
+                        }),
+                        None
+                    );
+                    assert!(!probed);
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn only_opengl_on_windows_gets_the_system_title_bar() {
+        use eframe::wgpu::Backends;
+        assert!(system_title_bar(true, Backends::GL));
+        for b in [Backends::DX12, Backends::VULKAN, Backends::DX12 | Backends::GL, Backends::VULKAN | Backends::GL, Backends::all()] {
+            assert!(!system_title_bar(true, b), "{b:?}");
+        }
+        for b in [Backends::GL, Backends::VULKAN, Backends::METAL] {
+            assert!(!system_title_bar(false, b), "{b:?}");
+        }
+    }
+
    #[test]
    fn wgpu_backend_the_preference_and_the_software_renderer_override_the_order() {
        use eframe::wgpu::Backends;
@@ -314,9 +562,16 @@ mod tests {

    #[test]
    fn probing_a_backend_alone_never_panics() {
-        // Whatever this machine has (often nothing): an answer, not a crash.
-        for b in WINDOWS_ORDER {
-            let _ = has_hardware_adapter(b);
+        // Whatever this machine has (often nothing): an answer, not a crash. On Windows the probe
+        // goes the way the app's does, stopping at the first backend with a GPU: a machine with
+        // D3D12 never loads its OpenGL driver into the test process, and AMD's (`atio6axx.dll`)
+        // aborted the process as it exited (#1156).
+        if cfg!(target_os = "windows") {
+            let _ = choose_backends(true, false, false, None, has_hardware_adapter);
+        } else {
+            for b in WINDOWS_ORDER {
+                let _ = has_hardware_adapter(b);
+            }
        }
    }

@@ -329,8 +584,18 @@ mod tests {
    #[test]
    fn the_software_adapter_is_preferred_and_its_absence_is_an_error_not_a_panic() {
        assert!(pick_cpu_adapter(&[], None).unwrap_err().contains("none"));
-        let instance = eframe::wgpu::Instance::new(eframe::wgpu::InstanceDescriptor::new_without_display_handle());
-        let adapters = pollster::block_on(instance.enumerate_adapters(eframe::wgpu::Backends::all()));
+        // The adapters the software renderer chooses among: it starts D3D12 alone on Windows
+        // (WARP), not every backend, so the test doesn't load the OpenGL driver either (#1156).
+        let options = crate::wgpu_options(true, None);
+        let eframe::egui_wgpu::WgpuSetup::CreateNew(setup) = &options.wgpu_setup else { panic!("the software renderer makes its own device") };
+        let backends = setup.instance_descriptor.backends;
+        if cfg!(target_os = "windows") && std::env::var_os(WGPU_BACKEND_ENV).is_none() {
+            assert_eq!(backends, eframe::wgpu::Backends::DX12);
+        }
+        let mut desc = solidcraft_gpu::instance_descriptor_from_env();
+        desc.backends = backends;
+        let instance = eframe::wgpu::Instance::new(desc);
+        let adapters = pollster::block_on(instance.enumerate_adapters(backends));
        if adapters.is_empty() {
            return;
        }
@@ -0,0 +1,117 @@
+//! Keeping the restored window reachable.
+//!
+//! The window comes back where it was left. After a monitor was unplugged, the scale changed or
+//! the settings came from a larger screen, that can put its title bar above the top edge or
+//! under the taskbar, out of reach of the mouse. [`fit`] pulls a window back into the monitor's
+//! work area (the screen without the taskbar), in whatever unit the caller measures both, as
+//! long as it is the same one.
+
+/// A rectangle: left, top, width, height.
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub struct Area {
+    pub x: f32,
+    pub y: f32,
+    pub w: f32,
+    pub h: f32,
+}
+
+impl Area {
+    pub const fn new(x: f32, y: f32, w: f32, h: f32) -> Self {
+        Area { x, y, w, h }
+    }
+    fn right(self) -> f32 {
+        self.x + self.w
+    }
+    fn bottom(self) -> f32 {
+        self.y + self.h
+    }
+    fn sane(self) -> bool {
+        [self.x, self.y, self.w, self.h].iter().all(|v| v.is_finite()) && self.w > 0.0 && self.h > 0.0
+    }
+}
+
+/// How much of the title bar must stay over the work area at least, to grab it.
+pub const REACHABLE: f32 = 100.0;
+/// The size a window gets when its saved geometry is unusable, before it is fitted to the screen.
+pub const DEFAULT_SIZE: (f32, f32) = (1600.0, 1000.0);
+
+/// `window` moved and shrunk so that it can be reached on `work`: no larger than the work area
+/// (but not below `min`), the title bar not above the work area's top, the window not below its
+/// bottom, and at least [`REACHABLE`] of it over the work area horizontally. A window that is
+/// fine is returned unchanged. Geometry that makes no sense (not finite, empty), or a work
+/// area that does not, gives the default size centred on the work area.
+pub fn fit(window: Area, work: Area, min: (f32, f32)) -> Area {
+    if !work.sane() {
+        return window;
+    }
+    let min = (min.0.min(work.w), min.1.min(work.h));
+    if !window.sane() {
+        let w = DEFAULT_SIZE.0.min(work.w * 0.9).max(min.0);
+        let h = DEFAULT_SIZE.1.min(work.h * 0.9).max(min.1);
+        return Area::new(work.x + (work.w - w) / 2.0, work.y + (work.h - h) / 2.0, w, h);
+    }
+    let w = window.w.clamp(min.0, work.w);
+    let h = window.h.clamp(min.1, work.h);
+    let reach = REACHABLE.min(w);
+    // A window that had to shrink goes fully onto the screen; one that fits may keep straddling two.
+    let x = if w < window.w { window.x.max(work.x).min(work.right() - w) } else { window.x.max(work.x + reach - w).min(work.right() - reach) };
+    let y = window.y.min(work.bottom() - h).max(work.y);
+    Area::new(x, y, w, h)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    const WORK: Area = Area::new(0.0, 0.0, 2560.0, 1400.0);
+    const MIN: (f32, f32) = (960.0, 600.0);
+
+    #[test]
+    fn a_window_on_screen_is_left_alone() {
+        let w = Area::new(300.0, 120.0, 1600.0, 1000.0);
+        assert_eq!(fit(w, WORK, MIN), w);
+    }
+
+    #[test]
+    fn a_title_bar_above_the_top_or_under_the_taskbar_comes_back() {
+        let fitted = fit(Area::new(300.0, -400.0, 1600.0, 1000.0), WORK, MIN);
+        assert_eq!((fitted.y, fitted.h), (0.0, 1000.0));
+        let fitted = fit(Area::new(300.0, 1300.0, 1600.0, 1000.0), WORK, MIN);
+        assert_eq!(fitted.y + fitted.h, 1400.0);
+        // A taskbar at the top moves the work area down.
+        let below_bar = Area::new(0.0, 48.0, 2560.0, 1352.0);
+        assert_eq!(fit(Area::new(300.0, 0.0, 1600.0, 1000.0), below_bar, MIN).y, 48.0);
+    }
+
+    #[test]
+    fn a_window_from_a_monitor_that_is_gone_keeps_a_grabbable_part_on_screen() {
+        let right = fit(Area::new(5000.0, 100.0, 1600.0, 1000.0), WORK, MIN);
+        assert_eq!(right.x, 2560.0 - REACHABLE);
+        let left = fit(Area::new(-4000.0, 100.0, 1600.0, 1000.0), WORK, MIN);
+        assert_eq!(left.x + left.w, REACHABLE);
+    }
+
+    #[test]
+    fn a_window_larger_than_the_screen_shrinks_to_it() {
+        let small = Area::new(0.0, 0.0, 1280.0, 720.0);
+        let fitted = fit(Area::new(-20.0, -30.0, 3200.0, 2000.0), small, MIN);
+        assert_eq!(fitted, small);
+        // Never below the minimum, unless the screen itself is smaller.
+        assert_eq!(fit(Area::new(0.0, 0.0, 100.0, 100.0), WORK, MIN).w, 960.0);
+        assert_eq!(fit(Area::new(0.0, 0.0, 100.0, 100.0), Area::new(0.0, 0.0, 800.0, 500.0), MIN).h, 500.0);
+    }
+
+    #[test]
+    fn unusable_geometry_is_centred_at_a_sensible_size() {
+        for bad in [Area::new(f32::NAN, 0.0, 1600.0, 1000.0), Area::new(0.0, 0.0, 0.0, 0.0), Area::new(0.0, 0.0, f32::INFINITY, 10.0)] {
+            let fitted = fit(bad, WORK, MIN);
+            assert_eq!(fitted, Area::new(480.0, 200.0, 1600.0, 1000.0));
+        }
+        let small = Area::new(100.0, 50.0, 1366.0, 728.0);
+        let fitted = fit(Area::new(f32::NAN, 0.0, 1.0, 1.0), small, MIN);
+        assert!(fitted.w <= small.w && fitted.h <= small.h && fitted.x >= small.x && fitted.y >= small.y);
+        // No work area to go by: nothing to change.
+        let w = Area::new(1.0, 2.0, 3.0, 4.0);
+        assert_eq!(fit(w, Area::new(0.0, 0.0, 0.0, 0.0), MIN), w);
+    }
+}
@@ -25,6 +25,7 @@ assets/
  fonts/{liberation-sans,biz-udp-gothic}/ # unmodified fonts and OFL licences
  locales/{en,de,ja,ko}.json          # shared offline catalogs
  platforms/{macos,linux,windows}/    # bundle, freedesktop and WiX templates
+  platforms/macos/dmg/                # disk image window: layout, dmgbuild settings, background art
  archive/icons/macos-v1/
    source/icon.vectorcraft          # earlier editable work, retained
                                     # redundant historical exports are retired
@@ -75,7 +76,7 @@ The CLI still supports arbitrary PNG/ICO exports with `solidcraft-cli icon`.
 | macOS | Composer master and paired exports; bundle installs `Assets.car` and `SolidCraft.icns` |
 | Windows executable | `solidcraft-executable.ico`: original DIB/mask representations at 16/24/32/48/64/128/256 px |
 | Windows installer | `solidcraft.ico`: PNG representations at 16/20/24/32/40/48/64/128/256 px; `SOLIDCRAFT_ICONS` override retained |
-| Linux, Nix, deb/rpm, tar, Flatpak, Snap | Copy canonical hicolor images; icon name stays `ai.storyteller.solidcraft` |
+| Linux, Nix, deb/rpm, tar, Flatpak, Snap | Copy canonical hicolor images; icon name stays `io.tangencylabs.solidcraft` |
 | AppImage | Uses the Linux 256 px image and `.DirIcon` alias |
 | FreeBSD | Shares Linux hicolor images and freedesktop metadata |
 | Web | HTML/Trunk and `manifest.webmanifest` stay in `apps/solidcraft-web/`; copies Japanese font/licence to `fonts/`, uses the collected CSS, and copies the Linux 32/256/512 px images to `icons/` for the favicon and installed app |
@@ -84,7 +85,7 @@ The CLI still supports arbitrary PNG/ICO exports with `solidcraft-cli icon`.
 ## Code and provenance

 Resources remain compiled by their owning layer through existing APIs:
-`ui-egui::icons::paint` and `Tokens` at L5, model presets in L2 `doc`, and sketch
+`ui-egui::icons::paint_icon` and `Tokens` at L5, model presets in L2 `doc`, and sketch
 fonts at L1. State, projection, interaction, commands and GPU bindings stay in
 their current modules. Embedded data uses `CARGO_MANIFEST_DIR`; application code
 needs no runtime resource registry or repository lookup.
@@ -1,5 +1,5 @@
 //! Built-in model appearances: names, sRGB colours and metalness.
-pub const LIBRARY: [(&str, [u8; 3], f64); 20] = [
+pub const LIBRARY: &[(&str, [u8; 3], f64)] = &[
    ("Aluminum - Satin", [204, 208, 214], 1.0),
    ("Aluminum - Anodized Black", [44, 46, 50], 1.0),
    ("Aluminum - Anodized Blue", [52, 92, 160], 1.0),
@@ -0,0 +1,11 @@
+//! Original illustrative opaque finishes; not measured optical or engineering data.
+//! (name, sRGB color, metal fraction, perceptual roughness). IOR is an illustrative 1.5.
+//! Separate names preserve the scalar library's appearance and saved assignments.
+pub const OPAQUE_FINISHES: &[(&str, [u8; 3], f64, f64)] = &[
+    ("Steel - Satin PBR", [158, 164, 172], 1.0, 0.4),
+    ("Aluminum - Satin PBR", [204, 208, 214], 1.0, 0.3),
+    ("Copper - Clean PBR", [204, 122, 80], 1.0, 0.25),
+    ("ABS - Molded PBR", [222, 222, 216], 0.0, 0.4),
+    ("PLA - Smooth PBR", [110, 160, 222], 0.0, 0.35),
+    ("Wood - Oak Uniform PBR Preview", [190, 146, 92], 0.0, 0.65),
+];
@@ -0,0 +1,292 @@
+//! Original starter visual data, MIT OR Apache-2.0. No external material library.
+use crate::appearance_pack::{Category, GlassBoundary, GlassRecipe, OpaqueRecipe, TextureAxis, TextureRecipe, VisualPreset};
+
+const WOOD: &str = "Uniform opaque preview only; grain resources/mapping are not applied";
+const SOLAR: &str = "Uniform opaque preview only; no cell grid, busbars, electricity or efficiency claim";
+const REGOLITH: &str = "Uniform opaque preview only; no granular displacement or measured lunar optical data";
+const OPAQUE: &str = "Illustrative opaque isotropic PBR; no measured alloy, polymer or engineering properties";
+
+const fn look(color: [u8; 3], metallic: f64, roughness: f64, dielectric_ior: f64) -> OpaqueRecipe {
+    OpaqueRecipe { color, metallic, roughness, dielectric_ior }
+}
+const fn maps(id: &'static str, repeat_mm: [f64; 2], grain: bool) -> Option<TextureRecipe> {
+    Some(TextureRecipe { id, repeat_mm, grain_axis: if grain { Some(TextureAxis::V) } else { None } })
+}
+const fn glass(transmission_linear_rgb: [f64; 3], ior: f64, reference_path_mm: f64, boundary: GlassBoundary) -> GlassRecipe {
+    GlassRecipe { transmission_linear_rgb, dielectric_ior: ior, reference_path_mm, boundary }
+}
+
+pub const STARTER_PACK: &[VisualPreset] = &[
+    VisualPreset::opaque(
+        "starter.wood.oak-honey",
+        "Wood - Honey Oak Uniform Preview",
+        Category::Wood,
+        look([190, 145, 88], 0.0, 0.64, 1.5),
+        WOOD,
+        maps("starter.wood.oak-honey.maps-v1", [120.0, 240.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.oak-smoked",
+        "Wood - Smoked Oak Uniform Preview",
+        Category::Wood,
+        look([91, 72, 55], 0.0, 0.68, 1.5),
+        WOOD,
+        maps("starter.wood.oak-smoked.maps-v1", [120.0, 240.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.walnut-dark",
+        "Wood - Dark Walnut Uniform Preview",
+        Category::Wood,
+        look([99, 66, 43], 0.0, 0.60, 1.5),
+        WOOD,
+        maps("starter.wood.walnut-dark.maps-v1", [100.0, 220.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.maple-light",
+        "Wood - Light Maple Uniform Preview",
+        Category::Wood,
+        look([221, 192, 141], 0.0, 0.57, 1.5),
+        WOOD,
+        maps("starter.wood.maple-light.maps-v1", [100.0, 200.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.cherry-warm",
+        "Wood - Warm Cherry Uniform Preview",
+        Category::Wood,
+        look([164, 99, 65], 0.0, 0.58, 1.5),
+        WOOD,
+        maps("starter.wood.cherry-warm.maps-v1", [110.0, 220.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.ash-pale",
+        "Wood - Pale Ash Uniform Preview",
+        Category::Wood,
+        look([209, 186, 146], 0.0, 0.70, 1.5),
+        WOOD,
+        maps("starter.wood.ash-pale.maps-v1", [120.0, 260.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.birch-cream",
+        "Wood - Cream Birch Uniform Preview",
+        Category::Wood,
+        look([228, 206, 163], 0.0, 0.63, 1.5),
+        WOOD,
+        maps("starter.wood.birch-cream.maps-v1", [100.0, 200.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.wood.teak-golden",
+        "Wood - Golden Teak Uniform Preview",
+        Category::Wood,
+        look([167, 122, 66], 0.0, 0.61, 1.5),
+        WOOD,
+        maps("starter.wood.teak-golden.maps-v1", [110.0, 250.0], true),
+    ),
+    VisualPreset::opaque(
+        "starter.metal.carbon-steel-polished",
+        "Metal - Polished Carbon Steel",
+        Category::Metal,
+        look([161, 166, 173], 1.0, 0.16, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.stainless-soft-satin",
+        "Metal - Soft Satin Stainless",
+        Category::Metal,
+        look([187, 193, 201], 1.0, 0.36, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.aluminum-bead-blast",
+        "Metal - Bead Blast Aluminum",
+        Category::Metal,
+        look([195, 201, 210], 1.0, 0.58, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.aluminum-silver-polish",
+        "Metal - Silver Polish Aluminum",
+        Category::Metal,
+        look([218, 224, 232], 1.0, 0.13, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.copper-aged-warm",
+        "Metal - Warm Aged Copper",
+        Category::Metal,
+        look([171, 95, 57], 1.0, 0.48, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.brass-champagne",
+        "Metal - Champagne Satin Brass",
+        Category::Metal,
+        look([205, 173, 102], 1.0, 0.32, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.bronze-dark-cast",
+        "Metal - Dark Cast Bronze",
+        Category::Metal,
+        look([133, 95, 58], 1.0, 0.66, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.titanium-matte",
+        "Metal - Matte Gray Titanium",
+        Category::Metal,
+        look([147, 149, 157], 1.0, 0.53, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.gold-warm",
+        "Metal - Warm Reflective Gold",
+        Category::Metal,
+        look([235, 190, 82], 1.0, 0.18, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.metal.silver-cool",
+        "Metal - Cool Reflective Silver",
+        Category::Metal,
+        look([225, 230, 237], 1.0, 0.12, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.plastic.abs-charcoal",
+        "Plastic - Charcoal ABS",
+        Category::Plastic,
+        look([43, 45, 48], 0.0, 0.44, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.plastic.abs-warm-white",
+        "Plastic - Warm White ABS",
+        Category::Plastic,
+        look([232, 229, 220], 0.0, 0.40, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque("starter.plastic.pla-coral", "Plastic - Coral PLA", Category::Plastic, look([218, 99, 83], 0.0, 0.43, 1.5), OPAQUE, None),
+    VisualPreset::opaque(
+        "starter.plastic.petg-cyan-opaque",
+        "Plastic - Opaque Cyan PETG",
+        Category::Plastic,
+        look([36, 148, 167], 0.0, 0.29, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.plastic.nylon-ivory",
+        "Plastic - Ivory Nylon",
+        Category::Plastic,
+        look([220, 213, 190], 0.0, 0.62, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.plastic.pc-graphite-opaque",
+        "Plastic - Opaque Graphite PC",
+        Category::Plastic,
+        look([70, 76, 84], 0.0, 0.27, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.plastic.hdpe-natural-opaque",
+        "Plastic - Opaque Natural HDPE",
+        Category::Plastic,
+        look([221, 222, 207], 0.0, 0.48, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque("starter.plastic.pom-black", "Plastic - Black POM", Category::Plastic, look([29, 31, 35], 0.0, 0.32, 1.5), OPAQUE, None),
+    VisualPreset::opaque(
+        "starter.plastic.tpu-matte-black",
+        "Plastic - Matte Black TPU",
+        Category::Plastic,
+        look([31, 30, 32], 0.0, 0.83, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::opaque(
+        "starter.plastic.peek-amber-opaque",
+        "Plastic - Opaque Amber PEEK",
+        Category::Plastic,
+        look([157, 119, 62], 0.0, 0.51, 1.5),
+        OPAQUE,
+        None,
+    ),
+    VisualPreset::glass(
+        "starter.glass.clear-soda-lime",
+        "Glass Recipe - Clear Soda Lime",
+        glass([0.92, 0.98, 0.96], 1.52, 3.0, GlassBoundary::Closed),
+    ),
+    VisualPreset::glass("starter.glass.low-iron-clear", "Glass Recipe - Low Iron Clear", glass([0.98, 0.99, 1.0], 1.50, 4.0, GlassBoundary::Closed)),
+    VisualPreset::glass("starter.glass.smoky-neutral", "Glass Recipe - Smoky Neutral", glass([0.35, 0.38, 0.42], 1.52, 3.0, GlassBoundary::Closed)),
+    VisualPreset::glass("starter.glass.amber-tint", "Glass Recipe - Amber Tint", glass([0.84, 0.38, 0.08], 1.51, 3.0, GlassBoundary::Closed)),
+    VisualPreset::glass("starter.glass.cobalt-blue", "Glass Recipe - Cobalt Blue", glass([0.06, 0.14, 0.76], 1.53, 3.0, GlassBoundary::Closed)),
+    VisualPreset::glass(
+        "starter.glass.thin-clear",
+        "Glass Recipe - Thin Clear Sheet",
+        glass([0.95, 0.98, 0.99], 1.50, 2.0, GlassBoundary::Thin { thickness_mm: 2.0 }),
+    ),
+    VisualPreset::opaque(
+        "starter.solar.mono-blue",
+        "Solar Panel - Mono Blue Uniform Preview",
+        Category::Solar,
+        look([20, 41, 85], 0.0, 0.20, 1.5),
+        SOLAR,
+        maps("starter.solar.mono-blue.maps-v1", [160.0, 160.0], false),
+    ),
+    VisualPreset::opaque(
+        "starter.solar.thin-film-dark",
+        "Solar Panel - Dark Thin Film Uniform Preview",
+        Category::Solar,
+        look([28, 33, 42], 0.0, 0.28, 1.5),
+        SOLAR,
+        maps("starter.solar.thin-film-dark.maps-v1", [100.0, 200.0], false),
+    ),
+    VisualPreset::opaque(
+        "starter.regolith.mare-charcoal",
+        "Regolith - Mare Charcoal Uniform Preview",
+        Category::Regolith,
+        look([56, 56, 55], 0.0, 0.97, 1.5),
+        REGOLITH,
+        maps("starter.regolith.mare-charcoal.maps-v1", [200.0, 200.0], false),
+    ),
+    VisualPreset::opaque(
+        "starter.regolith.highland-pale",
+        "Regolith - Highland Pale Uniform Preview",
+        Category::Regolith,
+        look([116, 113, 106], 0.0, 0.93, 1.5),
+        REGOLITH,
+        maps("starter.regolith.highland-pale.maps-v1", [200.0, 200.0], false),
+    ),
+    VisualPreset::opaque(
+        "starter.regolith.dust-neutral",
+        "Regolith - Neutral Dust Uniform Preview",
+        Category::Regolith,
+        look([86, 85, 81], 0.0, 1.0, 1.5),
+        REGOLITH,
+        maps("starter.regolith.dust-neutral.maps-v1", [150.0, 150.0], false),
+    ),
+    VisualPreset::opaque(
+        "starter.regolith.agglutinate-dark",
+        "Regolith - Dark Agglutinate Uniform Preview",
+        Category::Regolith,
+        look([66, 63, 60], 0.0, 0.89, 1.5),
+        REGOLITH,
+        maps("starter.regolith.agglutinate-dark.maps-v1", [200.0, 200.0], false),
+    ),
+];
@@ -1,88 +1,93 @@
-//! Original SolidCraft mark, shared by desktop, packaging and CLI.
+//! Original SolidCraft mark, shared by desktop, packaging and CLI: the borderless mark, five
+//! faces with transparent gaps between them, drawn from the macOS icon's
+//! `macos/source/SolidCraft.icon/Assets/03-solid-blue-cutout.svg`.
+type P = (f32, f32);
+
+/// One face in that SVG's units: its outline, and its linear gradient from one point and
+/// colour to another.
+struct Face {
+    outline: &'static [P],
+    from: (P, [u8; 3]),
+    to: (P, [u8; 3]),
+}
+
+const FACES: [Face; 5] = [
+    // Inner side of the upper step.
+    Face {
+        outline: &[(547.883, 282.66), (709.797, 188.211), (709.797, 375.985)],
+        from: ((619.14, 179.734), [29, 99, 198]),
+        to: ((694.687, 396.761), [21, 73, 158]),
+    },
+    // Top of the lower step.
+    Face {
+        outline: &[(727.797, 593.626), (727.797, 407.136), (889.571, 500.381)],
+        from: ((619.14, 413.244), [69, 159, 255]),
+        to: ((790.839, 605.547), [35, 121, 231]),
+    },
+    // Right face, with the recess.
+    Face {
+        outline: &[(530.0, 521.17), (691.797, 427.912), (691.797, 655.928), (907.594, 531.545), (907.594, 740.159), (530.0, 957.8)],
+        from: ((632.876, 399.508), [27, 102, 207]),
+        to: ((783.971, 968.175), [18, 69, 150]),
+    },
+    // Left face, stepped.
+    Face {
+        outline: &[(116.406, 510.769), (116.406, 303.529), (494.0, 521.17), (494.0, 957.8), (314.203, 854.167), (314.203, 624.777)],
+        from: ((207.063, 303.357), [37, 141, 245]),
+        to: ((426.837, 968.175), [20, 97, 218]),
+    },
+    // Top of the extruded profile.
+    Face {
+        outline: &[(134.374, 272.334), (512.0, 53.364), (691.828, 157.015), (476.117, 282.846), (673.752, 396.761), (512.0, 489.993)],
+        from: ((385.63, 53.364), [81, 173, 255]),
+        to: ((522.989, 510.769), [43, 131, 241]),
+    },
+];
+
+/// The mark's extent in SVG units: left, top, width, height.
+const BOUNDS: (f32, f32, f32, f32) = (116.406, 53.364, 791.188, 904.436);
+
 /// This block is the icon image data
 pub fn rgba(size: usize) -> Result<Vec<u8>, String> {
    if !(1..=2048).contains(&size) {
        return Err("icon size must be 1..=2048".into());
    }
-    type P = (f32, f32);
    // Coverage buffer at 4x4 samples per pixel (2x2 for big sizes), averaged down at the end.
    let ss = if size > 512 { 2 } else { 4 };
    let n = size * ss;
    let mut buf = vec![[0u8; 4]; n * n];
-    let s = n as f32 / 412.217; // SVG units -> samples: the logo fills the height
-    let ox = (n as f32 - 357.0 * s) / 2.0; // and is centred sideways
-    // Fill a convex polygon given in SVG units.
-    let mut fill = |pts: &[P], col: [u8; 3]| {
-        let v: Vec<P> = pts.iter().map(|p| (ox + p.0 * s, p.1 * s)).collect();
+    let (bx, by, bw, bh) = BOUNDS;
+    let s = n as f32 / bh; // SVG units -> samples: the mark fills the height
+    let (ox, oy) = ((n as f32 - bw * s) / 2.0 - bx * s, -by * s); // and is centred sideways
+    // Fill each face's outline (even-odd spans per row, so concave outlines work) with its gradient.
+    for face in &FACES {
+        let v: Vec<P> = face.outline.iter().map(|p| (ox + p.0 * s, oy + p.1 * s)).collect();
+        let (((fx, fy), c0), ((tx, ty), c1)) = (face.from, face.to);
+        let (gx, gy) = (tx - fx, ty - fy);
+        let g2 = gx * gx + gy * gy;
        let (top, bottom) = v.iter().fold((f32::MAX, f32::MIN), |(a, b), p| (a.min(p.1), b.max(p.1)));
+        let mut xs = Vec::with_capacity(v.len());
        for y in ((top - 0.5).ceil() as i32).max(0)..=((bottom - 0.5).floor() as i32).min(n as i32 - 1) {
            let cy = y as f32 + 0.5;
-            let (mut lo, mut hi) = (f32::MAX, f32::MIN);
+            xs.clear();
            for i in 0..v.len() {
                let (a, b) = (v[i], v[(i + 1) % v.len()]);
                if (a.1 <= cy) != (b.1 <= cy) {
-                    let x = a.0 + (cy - a.1) / (b.1 - a.1) * (b.0 - a.0);
-                    lo = lo.min(x);
-                    hi = hi.max(x);
+                    xs.push(a.0 + (cy - a.1) / (b.1 - a.1) * (b.0 - a.0));
                }
            }
-            if lo > hi {
-                continue;
-            }
-            for x in ((lo - 0.5).ceil() as i32).max(0)..=((hi - 0.5).floor() as i32).min(n as i32 - 1) {
-                buf[y as usize * n + x as usize] = [col[0], col[1], col[2], 255];
+            xs.sort_by(f32::total_cmp);
+            for &[from, to] in xs.as_chunks::<2>().0 {
+                for x in ((from - 0.5).ceil() as i32).max(0)..=((to - 0.5).floor() as i32).min(n as i32 - 1) {
+                    // The sample's place along the gradient, in SVG units.
+                    let (px, py) = ((x as f32 + 0.5 - ox) / s, (cy - oy) / s);
+                    let t = (((px - fx) * gx + (py - fy) * gy) / g2).clamp(0.0, 1.0);
+                    let mix = |k: usize| (f32::from(c0[k]) + (f32::from(c1[k]) - f32::from(c0[k])) * t).round() as u8;
+                    buf[y as usize * n + x as usize] = [mix(0), mix(1), mix(2), 255];
+                }
            }
        }
-    };
-    // Faces: each is a few overlapping convex pieces (the filler only does convex shapes).
-    let (light, mid, dark) = ([96, 158, 236], [58, 136, 238], [55, 108, 197]);
-    fill(&[(3.5, 105.9), (177.0, 5.8), (263.4, 55.6), (263.8, 156.0), (177.0, 406.4)], light);
-    fill(&[(177.0, 206.1), (263.8, 156.0), (350.5, 206.2), (350.5, 306.3), (177.0, 406.4)], light);
-    fill(&[(3.5, 105.9), (177.0, 206.1), (177.0, 406.4)], mid);
-    fill(&[(3.5, 105.9), (3.5, 205.7), (90.3, 256.2), (177.0, 206.1)], mid);
-    fill(&[(177.0, 206.1), (90.3, 256.2), (90.0, 356.2), (177.0, 406.4)], mid);
-    fill(&[(264.1, 155.8), (177.0, 206.1), (177.0, 406.4), (263.8, 256.2)], dark);
-    fill(&[(263.8, 256.2), (350.5, 206.2), (350.5, 306.3), (177.0, 406.4)], dark);
-    fill(&[(177.0, 206.1), (177.0, 406.4), (350.5, 306.3)], dark);
-    fill(&[(263.8, 55.9), (263.8, 156.0), (177.1, 105.9)], dark);
-    // White edge lines, 10 units wide: a rectangle per segment and a disc at each inner corner.
-    let white = [255, 255, 255];
-    let mut stroke = |pts: &[P], closed: bool| {
-        let m = pts.len();
-        for i in 0..(if closed { m } else { m - 1 }) {
-            let (a, b) = (pts[i], pts[(i + 1) % m]);
-            let l = ((b.0 - a.0).powi(2) + (b.1 - a.1).powi(2)).sqrt();
-            let (nx, ny) = (-(b.1 - a.1) / l * 5.0, (b.0 - a.0) / l * 5.0);
-            fill(&[(a.0 + nx, a.1 + ny), (b.0 + nx, b.1 + ny), (b.0 - nx, b.1 - ny), (a.0 - nx, a.1 - ny)], white);
-        }
-        for c in &pts[if closed { 0 } else { 1 }..if closed { m } else { m - 1 }] {
-            let disc: Vec<P> = (0..16)
-                .map(|k| {
-                    let t = k as f32 * std::f32::consts::TAU / 16.0;
-                    (c.0 + 5.0 * t.cos(), c.1 + 5.0 * t.sin())
-                })
-                .collect();
-            fill(&disc, white);
-        }
-    };
-    stroke(&[(263.8, 55.9), (177.1, 105.9), (263.8, 156.0), (263.8, 256.2), (350.6, 206.1)], false);
-    stroke(&[(5.0, 105.9), (178.5, 206.1), (178.5, 406.4)], false);
-    stroke(&[(177.0, 206.1), (263.8, 156.0)], false);
-    stroke(
-        &[
-            (178.5, 5.8),
-            (5.0, 105.9),
-            (5.0, 206.1),
-            (91.7, 256.2),
-            (91.7, 356.4),
-            (178.5, 406.4),
-            (352.0, 306.3),
-            (352.0, 206.1),
-            (265.2, 156.0),
-            (265.2, 55.9),
-        ],
-        true,
-    );
+    }
    // Average each ss x ss block down to one pixel (straight alpha = covered share).
    let mut rgba = Vec::with_capacity(size * size * 4);
    for y in 0..size {
@@ -123,4 +128,20 @@ mod tests {
        assert!(super::rgba(0).is_err());
        assert!(super::rgba(2049).is_err());
    }
+
+    /// Borderless: no white edge lines, and the gaps between faces are see-through. At 256 px
+    /// the gap between the left and right faces (SVG x 494..530) is transparent on the row
+    /// through the middle of the mark, and no opaque pixel is white.
+    #[test]
+    fn shared_mark_is_borderless() {
+        let size = 256;
+        let pixels = super::rgba(size).expect("valid size");
+        let px = |x: usize, y: usize| pixels.as_chunks::<4>().0[y * size + x];
+        let s = size as f32 / 904.436;
+        let gap_x = ((size as f32 - 791.188 * s) / 2.0 + (512.0 - 116.406) * s) as usize;
+        let row = ((750.0 - 53.364) * s) as usize;
+        assert_eq!(px(gap_x, row)[3], 0, "the seam between the left and right faces is a gap");
+        assert!(px(gap_x - 8, row)[3] == 255 && px(gap_x + 8, row)[3] == 255, "faces on both sides of the gap");
+        assert!(pixels.as_chunks::<4>().0.iter().all(|p| p[3] == 0 || p[0] < 200), "no white edges");
+    }
 }
@@ -91,7 +91,7 @@ Palette changes preserve accepted artwork and never update review hashes.
 | `source/` | Rust viewport glyphs, markers, navigation and pointer; not command icons |

 `crates/ui-egui/build.rs` embeds SVGs, palette and aliases. `icon_svg.rs` parses and
-rasterises them for `icons::paint`; adding an icon still requires its registry or
+rasterises them for `icons::paint_icon`; adding an icon still requires its registry or
 UI assignment and an application rebuild. Review status never controls rendering.

 ## Checks and reports
@@ -0,0 +1,93 @@
+# Render workspace icon drafts
+
+All ids below are **Open** for owner review, except `render_scene` and `render_image`,
+which are existing accepted icons used only as references. No commands, toolbar
+entries, browser selectors or runtime request manifests are changed by this draft set.
+`render_remove_override` is the one remaining alias (of `render_from_material`);
+`render_execute`, `render_environment` and `render_fit_product` now have their own
+masters in `design/svg/model/`. Accepted source masters stay unchanged.
+
+Review with `python3 -B assets/icons/ui/design/tools/icon_status.py --serve`,
+search `render_`, and select Open. See [STYLE_GUIDE.md](STYLE_GUIDE.md) for
+acceptance; drafts do not imply implemented commands.
+
+The finished references in each row were read and previewed in both themes
+before authoring. Draft contact sheets (96, 24 and 16 px, both themes) are local
+review evidence, not shipped assets. The icons are grouped in five families, each
+with one shared design rule.
+
+## Lights
+
+Rule: a slate source glyph with light passive fill, 2.55-unit outlines and a dotted
+accent stem (three dots, 4.25 diameter, 7 units apart) showing the direction.
+
+| Meaning | Id | Finished references | Drawing |
+|---|---|---|---|
+| Light area | `render_light_area` | `box`, `camera` | Slanted flat panel on the canonical axes above the dotted stem. |
+| Light spot | `render_light_spot` | `camera`, `material` | Cone with a curved rim above the dotted stem. |
+| Light point | `render_light_point` | `camera`, `material` | Round source disc with a centre dot above the dotted stem. |
+| Sun | `render_sun` | `sphere`, `camera` | Source disc of the same size with eight short radial rays instead of a stem. |
+| Light by highlight | `render_light_by_highlight` | `sphere`, `material` | Shaded sphere with a ringed highlight target; the dotted stem arrives from above. |
+| Solo light | `render_solo_light` | `fit`, `camera` | Point source and stem inside four corner focus brackets. |
+
+## Looks
+
+Rule: the lit look sphere (top-left highlight, bottom-right shade) plus one cue that
+says what happens to it; receiving bodies stay canonical grey or cube shapes.
+
+| Meaning | Id | Finished references | Drawing |
+|---|---|---|---|
+| Appearance | `render_appearance` | `material`, `box` | Shaded look sphere on the top corner of an accent-shaded cube: a look assigned to a body. |
+| Paint | `render_paint` | `material`, `paste` | Flat brush with an accent tip, light ferrule and slate handle. |
+| Pick up | `render_pick_up` | `material`, `copy` | Eyedropper with a grey bulb, slate crossbar and accent sampling tip. |
+| Replace all | `render_replace_all` | `copy`, `box` | Grey sample sphere with an arrow to an accent sphere, beside a second accent sphere. |
+| Copy look | `render_copy_look` | `material`, `copy` | Look sphere in a square frame, offset from a second frame outline. |
+| Remove override | `render_remove_override` | `appearance`, `box` | Alias of `render_from_material`: the custom look is crossed off. |
+| Same look | `render_same_look` | `select`, `box` | Look sphere and three cubes; the two matching cubes are ringed. |
+| From material | `render_from_material` | `material`, `extrude` | Look sphere struck through above a plain grey slab, so the material shows. |
+
+## Studio
+
+Rule: the standard grey cube stands in the set-up it is lit or placed in.
+
+| Meaning | Id | Finished references | Drawing |
+|---|---|---|---|
+| Library | `render_library` | `library`, `copy` | Row of three look spheres, the middle one accent, on a shelf bar. |
+| Lighting presets | `render_lighting_presets` | `new`, `render_scene` | Two stacked cards, the front one holding a light bulb. |
+| Environment | `render_environment` | `environment_map`, `render_scene` | Dome with a grey cube inside. |
+| Ground | `render_ground` | `box`, `render_scene` | Grey cube on a slab with an accent contact patch. |
+| Backdrop | `render_backdrop` | `render_scene`, `render_image` | Grey cube in front of a tall upright accent panel. |
+
+## Camera and shots
+
+Rule: one chunky camera body with a lower-right round badge for shot actions; the
+other camera icons are simple frames.
+
+| Meaning | Id | Finished references | Drawing |
+|---|---|---|---|
+| Shot | `render_shot` | `camera`, `new` | Camera body with a plus badge: save a shot. |
+| Update shot | `render_update_shot` | `camera`, `undo` | Camera body with a refresh badge. |
+| Render all shots | `render_all_shots` | `copy`, `render_image` | Stacked camera bodies with a play badge. |
+| Shots strip | `render_shots_strip` | `camera`, `copy` | Strip of three small frames, the middle one in accent. |
+| Fit product | `render_fit_product` | `fit`, `camera` | Grey cube inside four corner brackets. |
+| Lens / field of view | `render_lens` | `camera`, `fit` | Concentric lens rings around an accent centre. |
+| Exposure | `render_exposure` | `material`, `environment_map` | Disc split light and accent, with plus and minus marks. |
+| Aspect frame | `render_aspect_frame` | `render_image`, `fit` | Wide rounded frame with two opposite corner brackets. |
+| Frame guides | `render_frame_guides` | `render_image`, `fit` | Rounded frame with a rule-of-thirds grid and four accent nodes. |
+
+## Output and result
+
+Rule: one picture base (frame with landscape) with a lower-right round badge; the
+size, background and quality icons draw their own simple subject.
+
+| Meaning | Id | Finished references | Drawing |
+|---|---|---|---|
+| Render image | `render_execute` | `render_image`, `camera` | Picture with a play badge: create a rendered image. |
+| Render output size | `render_output_size` | `render_image`, `fit` | Picture frame with a diagonal double-headed dimension arrow. |
+| Transparent background | `render_transparent_background` | `material`, `render_image` | Grey cube on a checker tile. |
+| Quality | `render_quality` | `list`, `library` | Three rising bars, the tallest in accent. |
+| Check render | `render_check` | `render_image`, `new` | Picture with a check badge. |
+| Cancel render | `render_cancel` | `render_image`, `delete` | Picture with a square stop badge. |
+| Export image | `render_export_image` | `render_image`, `copy` | Picture with a large outward diagonal arrow at the upper right. |
+| Compare | `render_compare` | `render_image`, `material` | Two grey pictures split by a vertical slider with opposed arrows. |
+| Results | `render_results` | `render_image`, `copy` | Stack of two pictures, the front one showing a landscape. |
@@ -78,7 +78,7 @@ Its projected circle uses the same axes; do not arbitrarily flatten the ellipse.

 Only use the stable `source` identifiers below in model SVGs. The renderer maps roles to
 light/dark theme values. `currentColor` is the background line-art role, not a way
-to add arbitrary colours. All values and accents come from `design/palette.toml`.
+to add arbitrary colours. Default display values and semantic accents come from `design/palette.toml`. Theme files may override those display roles and ramps through `icon_palette`; source identifiers and accent assignments stay unchanged.

 | Role | Author helper | Light value | Use |
 | --- | --- | --- | --- |
@@ -96,9 +96,9 @@ The source hexes identify paint roles, not the displayed colour. **Never recolou
 SVG to apply a workspace accent.** Keep these identifiers and every finished shape
 unchanged; the runtime and review page resolve them through `design/palette.toml`.

-That file is the single colour authority: edit `light`/`dark` in the relevant
+That file is the default colour authority: edit `light`/`dark` in the relevant
 `accents` ramp; `active-3` is its primary stroke and `active-1/2` are shaded faces.
-Do not edit a role's `source` identifier. `variants` holds colour-vision adjustments.
+Do not edit a role's `source` identifier. Theme `icon_palette` overrides affect display colours only; colour-vision variants still take precedence. `variants` holds colour-vision adjustments.
 A role with `use = "active-3"` follows that stroke automatically.

 | Meaning | Accent | Assignment |
@@ -27,8 +27,12 @@ error = { master = "status_error", accent = "surface" }
 warning = { master = "status_warning", accent = "mesh" }
 ground = "c_fix"

+# Visual style: Shaded with edges is the generic style icon.
+style_shaded_edges = "style"
+
 # Same finished drawing, different semantic operation. Colours live only in palette.toml.
 sketch_break = { master = "break", accent = "sketch" }
+sketch_cancel = { master = "close", accent = "sketch" }
 sketch_dxf = { master = "dxf", accent = "sketch" }
 sketch_move = { master = "move", accent = "sketch" }
 sketch_scale = { master = "scale", accent = "sketch" }
@@ -44,3 +48,7 @@ sketch_chamfer_equal = { master = "sketch_chamfer", accent = "sketch" }
 sketch_chamfer_two = { master = "sketch_chamfer_two_distances", accent = "sketch" }
 offset_one_side = { master = "offset", accent = "sketch" }
 bom = "list"
+
+# Render workspace drafts: shared meanings; owner review remains Open.
+# Removing a look override returns the body to its material look.
+render_remove_override = "render_from_material"
@@ -48,6 +48,38 @@ source = "#236ead"
 light = "#236ead"
 dark  = "#2976b8"

+# Simultaneous component colours for inspection icons; existing workspace ramps stay unchanged.
+
+[roles.component-orange-1]
+source = "#f1d2af"
+light = "#f1d2af"
+dark = "#ba8f6a"
+
+[roles.component-orange-2]
+source = "#c06f00"
+light = "#c06f00"
+dark = "#b86f04"
+
+[roles.component-orange-3]
+source = "#a45000"
+light = "#a45000"
+dark = "#95682d"
+
+[roles.component-yellow-1]
+source = "#e5d99b"
+light = "#e5d99b"
+dark = "#a9985f"
+
+[roles.component-yellow-2]
+source = "#a28200"
+light = "#a28200"
+dark = "#9a8100"
+
+[roles.component-yellow-3]
+source = "#826700"
+light = "#826700"
+dark = "#857100"
+
 [strokes]          # on the 64 grid
 geometry = 2.55
 action = 4.25
@@ -156,7 +188,7 @@ surface = [
 sketch = [
  "arc3", "arc_center", "arc_slot", "arc_slot_center", "arc_tangent",
  "blend", "circle", "circle2", "circle3", "circle_tt",
-  "circle_ttt", "conic", "constrainer", "dimension", "ellipse",
+  "circle_ttt", "conic", "constrainer", "dimension", "ellipse", "equation_curve",
  "extend", "finish", "fit_section", "include",
  "intersect", "intersection_curve", "iso_curve", "line", "line_mid",
  "offset", "offset_two_sides", "offset_symmetric", "point", "polygon", "polygon_circumscribed", "polygon_edge",
@@ -172,5 +204,11 @@ constraint = [
  "c_polygon", "c_smooth", "c_symmetry", "c_tangent",
 ]
 construction = [
-  "centerline", "construction", "infinite",
+  "centerline", "construction", "construction_line", "construction_line_angle",
+  "construction_line_bisector", "construction_line_horizontal", "construction_line_parallel",
+  "construction_line_perpendicular", "construction_line_tangent_at", "construction_line_tangent_external",
+  "construction_line_tangent_two", "construction_line_vertical", "infinite",
+]
+mesh = [
+  "mesh_body",
 ]
@@ -1,6 +1,8 @@
 accessibility	false
 activate	false
+agent_chat	false
 align	false
+ambient_occlusion	false
 appearance	false
 arc3	false
 arc_center	false
@@ -57,14 +59,27 @@ circle_tt	false
 circle_ttt	false
 close	false
 coil	false
+colored_components	false
+colored_components_off	false
 combine	false
 compare	false
 component	false
 compute	false
+cone	false
 configuration_table	false
 conic	false
 constrainer	false
 construction	false
+construction_line	false
+construction_line_angle	false
+construction_line_bisector	false
+construction_line_horizontal	false
+construction_line_parallel	false
+construction_line_perpendicular	false
+construction_line_tangent_at	false
+construction_line_tangent_external	false
+construction_line_tangent_two	false
+construction_line_vertical	false
 contact_all	false
 contact_new	false
 contact_off	false
@@ -80,6 +95,8 @@ decal	false
 delete	false
 delete_face	false
 dimension	false
+display	false
+dots	false
 draft	false
 draft_analysis	false
 drive	false
@@ -88,6 +105,7 @@ edit	false
 ellipse	false
 emboss	false
 environment_map	false
+equation_curve	false
 error	false
 explode	false
 export	false
@@ -96,17 +114,22 @@ extend	false
 extrude	false
 eye	false
 fastener	false
+feature_group	false
 fillet	false
 finish	false
+finish_edit	false
 fit	false
 fit_section	false
 flange	false
 flat	false
 fold	false
 folder	false
+frame_member	false
 gear	false
 graph	false
+grid	false
 ground	false
+ground_shadow	false
 help	false
 hem	false
 hole	false
@@ -132,6 +155,7 @@ loft	false
 lookat	false
 material	false
 measure	false
+mesh_body	false
 mesh_export	false
 min_radius	false
 mirror	false
@@ -141,18 +165,14 @@ new	false
 normal	false
 offset	false
 offset_face	false
-offset_one_side	false
-offset_symmetric	false
-offset_two_sides	false
 open	false
 orbit	false
 origin	false
 pan	false
 params	false
 paste	false
-pattern_center	false
+path_flange	false
 pattern_circ	false
-pattern_flip	false
 pattern_path	false
 pattern_rect	false
 perforate	false
@@ -208,12 +228,21 @@ scale	false
 screw	false
 section	false
 select	false
+send	false
 settings	false
+settings_keyboard	false
+settings_monitor	false
+settings_mouse	false
+settings_palette	false
+settings_plug	false
+sheet	false
 sheet_rules	false
 shell	false
+shield	false
 silhouette	false
 sketch	false
 sketch_break	false
+sketch_cancel	false
 sketch_chamfer	false
 sketch_chamfer_angle	false
 sketch_chamfer_equal	false
@@ -242,8 +271,16 @@ split_face	false
 spun	false
 star	false
 status_error	false
+status_pin	false
+status_recovery	false
 style	false
+style_hidden_edges	false
+style_shaded	false
+style_shaded_edges	false
+style_translucent	false
+style_wireframe	false
 suppress	false
+surface	false
 surface_blend	false
 surface_boundary	false
 surface_extend	false
@@ -266,6 +303,8 @@ svg	false
 sweep	false
 text	false
 thread	false
+timeline_play	false
+timeline_stop	false
 torus	false
 trace	false
 trim	false
@@ -6,6 +6,7 @@
  "agent_chat": "4a9ae0e7e2c360b4858b3175674c93d096705c92318fecd481e849f3ae650bf4",
  "agent_link": "2f20d89a0e3e9b28744910dddf7f282a1099ccd91aa160c9841c5b1d9ea9ed0f",
  "align": "05615db7dd9e4be56ae898e59a68c548b8a8447794442a9a394940651204bc4f",
+  "ambient_occlusion": "973f8ef2326aeaf0face576e5a2c79c7ef3d13638b2c51a5aad199e4ef7edb02",
  "appearance": "b3162edd92291a5ef402e8499cd52be05beb2fa7eda641163c3f6e98325de2bf",
  "arc3": "fdca3d501fd557ac989376a12e9c4fa8231fde2b455c20724d1079a466153e9c",
  "arc_center": "3a5fdeb1d64fc6741f944c4435870b05fccab62293e270da692c6681155cbc51",
@@ -88,6 +89,7 @@
  "dimension": "a926b7c64bc8ca99d8d6dcbb81b95235bd3fc34fbed049aca8b01b4d1147c15d",
  "disclosure_closed": "49a350c6f2efae78de0be96c524ebee1fd1291ea449a84224b88d37164a4e807",
  "disclosure_open": "d13ce3f97e3e362a9904fa2bf3412f3f00e4136bc23538b92d41483961d280de",
+  "display": "58b45e5e2230eaf2c80f74b3be2e02a23714c90d6fb03b59ed093a1949993163",
  "dots": "600f7ff209d93145fc938bc4f6a1e34473e6b9ee22a5b4718f133bc7da5ee58d",
  "draft": "9c0fc361cacd0ad95ccd54794f4825dfc9901a83a3de752a588faec365d0ee09",
  "draft_analysis": "eb39c0f90e9cf226da6307365a76015e900dd692dc3f0fdc8f02fe717226261f",
@@ -101,6 +103,7 @@
  "error": "b7188fcdfadf1512ddd2896805a14618179789f87047b219560a7dab74bd360f",
  "explode": "2aecb05d5f05aff1ab629066cb9bea8718ea213ac70948ef71a3ced3321f4cb2",
  "export": "c8c2abf007e43e896479d78798e3976ba9eda809507c820bb38538f77db696ac",
+  "export_tray": "f18606e1f63726c57a0787dced4fb8a221b4a4fc18b88b0bbdee743e546cb489",
  "extend": "28c63df352c77d02feffe44cf09fb0fc1d48f7905aaabbfa6dba601dbb70f8e8",
  "extrude": "9cc1538971c5d25467aaed23f739899d9d102fd07f86472ac3197c54ca2e1144",
  "eye": "2449167c8410826dc1106b687c12a309d5bea8f7817b897943e80f182a163c2d",
@@ -116,12 +119,15 @@
  "folder": "c19f5230df45a1bda1e92e89de38bba21c91e6eca0517eb15847a7712012d1e5",
  "gear": "25a1ca48a587850da1104a46005a330873ed196246e3d04e12cf61f26ad2b0d5",
  "graph": "7156caedd2dbfa2ae53da18b7a2204b8db66c45126859d36caf049a3fd4335a4",
+  "grid": "084b5040d57e9d5183b3db1fad0d17a13ab5bae64676eef703cc06622f9c7438",
  "ground": "23e2471a9d6872e83028e0e219e330cef1930a4d89456a0fefa1bda8a7e3eb81",
+  "ground_shadow": "a96809ed87f5047c2d7f1274908ed7b65b180613322ac9c10eb0f9d6296c1b66",
  "help": "8ce4060577483dbdb510be147d2827de50ac20029354008fca55abc0c7edf05d",
  "hem": "f9b1aafbedcf3dc90c26be308814638e0095fbe31b0647092507343fa60af011",
  "hole": "f82d47751f826e08682db847a270897474661bfe9f35b6d3678f49a203172563",
  "home": "ab5f1c41d377687e4c5a808dfdccf2757b33dd43f934d44df43d6e9118176853",
  "import": "e343540eb49fdb1e53c4d54b9e60ae513b3103df6c9133048bed878e58067455",
+  "import_tray": "c6aec9556dc8ecb6c953d6bf1f384f220c68167a92e444950c24ded81f66a0b6",
  "include": "f5b80ad3e06e3b863fcfbe415ec912e4e09653dd519f9ac207819339fe34730f",
  "infinite": "53fb781131078d2f8e71be23aa610d9f9d9c8bb79ba5f97fa397475e9ff8c3bd",
  "inspect": "d2b4644b2d5f1aa50cb576b9265e275fa91201e296c2bc79865f810067d538e9",
@@ -206,8 +212,45 @@
  "redo": "28e925493fa9e5f52e2c8e3beeb288af13fdb4f85f3cd92270096a10561e7a1a",
  "refold": "1fa6a8604af7d04c01bc31d0e5875eb2cc91f5fa6bfc5491dd6680d3299eb26f",
  "rename": "6887c5467101dca1d213154020d3b03be9b2704ac310de9d0a8ebde62c013bf5",
+  "render_all_shots": "9c04f49624cc2685472041cb3f3e95da2c5f32deeebb9723f4a8e3c369680a5b",
+  "render_appearance": "53287b30915a266d8a3858d5bef24b93ed11f8d612c20c445d3032f400a925cc",
+  "render_aspect_frame": "5d74b263eeb03eb0494b3774817135b8f119caff205a8b31c480d7dd0e5a8554",
+  "render_backdrop": "d27f7d6da7a31c5944dd0ff67c21838690f000f2d87b0bf5274bef0744de34ce",
+  "render_cancel": "2f1d8b3039007ccfc224390758e05d6202fa2eabf63724c744217dcab5d58e5e",
+  "render_check": "65ccf0407d80937c6931cbf87b6d0e628cfb62ca3e841483d02dd9de19c3717c",
+  "render_compare": "1b2d3f3920782490b96b4d14a7cc9506eff98ff2efae00f86d911fabcabc7cb0",
+  "render_copy_look": "25e9138a839a7e6b8225b48cd2f36daba42a928eff541fe616f3df39a1bc82b7",
+  "render_environment": "50cb18380d9310f6e04084c24ac85529599966b1d90c6bef514f4e63f9b30854",
+  "render_execute": "e4d9a66f4569e00c4b4b2ac05a80a9f3eba4e59802c62d3af5bb951ba9153cbf",
+  "render_export_image": "2456f55fa3b50ab84ae871963d4a6b6e92f486cf6ed3039f3a2f07f11192a655",
+  "render_exposure": "60eb5fa040aefe872ab2de66099493513a494ab758a23d443753d033eaf3a05d",
+  "render_fit_product": "8e58b293a39a06fca4cda0543adc2afef3d0041fe34b0bc0c800afb2d5635123",
+  "render_frame_guides": "cb1df01051de42047e38de9dd2a96fcb5b67bd5979cb5756412890400b69e5bc",
+  "render_from_material": "c928daa803a28f90ce24096731b8de711c6cd3215259ac9cd761b6be2e1b9618",
+  "render_ground": "2b900b433870cbc4bd0282e54c604ec696aa28354c753a13b09806f5e87d99c3",
  "render_image": "e3dd622591de4fdc211f9bd3c6dcb54b01a308e8bcebd02bb80dd6b3982ce2a5",
+  "render_lens": "79bb615d46a05ea5ffc9e2e905cc25f266b3b7e761c160f7d25bbdb3dea0a430",
+  "render_library": "828af74034a62616c774ab0cbe70b7cf9fd42778b574febfb1812f8aa17fd49b",
+  "render_light_area": "b1f3ee596ee1d35f6e8444b54e94f36a34c2129697c88e5286dbf38565f50816",
+  "render_light_by_highlight": "5b37c8c6aa27ac2002dd8c8094e415c64e9eb315a55c4f146e328314e8f639a2",
+  "render_light_point": "a602cb5fa26f04f1bb9be7c14e5a9a9ce52b37550dfd3211a55e915f941f5803",
+  "render_light_spot": "a9413de906266bec0165b4cb06ecac8e36dce0b6ddec4bc4cc6ff4f152601483",
+  "render_lighting_presets": "e0a08433f548a9dd139296107b04b1d4c57ff04303c9bee32d896e2ea06a8d07",
+  "render_output_size": "f08fe354e4d5a6dd21af29cb077ceed96c413c68f48d9f72548ae1614337f88b",
+  "render_paint": "e3d3202205a5a90906348cae519340d38f475e42039a7f60c835cf7a21081da1",
+  "render_pick_up": "df67d10f333a3c9e367897d599a4be510f10ed36c24763c26817f22d24ff35b7",
+  "render_quality": "28fe44cdd2b2f58b91d91dcf20a6dfbd22cf3db6008e1db179717523ecc4889e",
+  "render_remove_override": "c928daa803a28f90ce24096731b8de711c6cd3215259ac9cd761b6be2e1b9618",
+  "render_replace_all": "3bbf830619a91be186b9dc91726b8e47c293556d2ac8c93d87c71014c9f3abcd",
+  "render_results": "94e78898d88eef415e56ca5ec1e056089a2a5aa709abc69e5b8103d6096a019c",
+  "render_same_look": "2b5c69c523a1c949c22638c378803e77123095fddd36cfa58e94b2fd91ca61d7",
  "render_scene": "1c4d7350f6f17ad637a7d633cb65a64c298af20321b1dbdac01b51d47a0e2822",
+  "render_shot": "4428080faa94f276c8a1d20eb38d04835ee5ae9d6337402371a5edf09f97ddc5",
+  "render_shots_strip": "1dcf5cc8e704691985284e0ca06e03b22540ea9d4cd23f4fb8675801ae7e69ec",
+  "render_solo_light": "abb9f8993be108a79d491bfaca32cde59d07a69db3ead58195e8ca0d8e8d909b",
+  "render_sun": "d86b51f3d4d83df4e932a22bb20d567513529a2eaaa42b93f744412eed2be901",
+  "render_transparent_background": "71dab4763516053734d4eec964b0899716d617597fe0d09e3bfa0cc36224dd7a",
+  "render_update_shot": "22d82ad332f8325395596c4bec4c1ec9bbb72d9fc4cd62ad658a93d7f5f803b9",
  "reorder": "c45755c8f23575415397bffb316eed9f2d8c014f451ab6f8c3123aca1a99b675",
  "replace_face": "fcee556c684a1138a30a2574ea565c98ff29f9368c2e861d0fb861155a57d28b",
  "rest": "eab64961b5340bdbbd92affe0c9b8477dc297a3b49e05e39d5fa71c0f2fda66c",
@@ -224,10 +267,23 @@
  "screw": "5e30570785360d6a591ea22862a82f1cf62228385c1e96382536db8a453ac791",
  "section": "cdd13f99f15f6d59bfa21c747810608d6afd00cb8207faf0337928c8521e7eae",
  "select": "fdf6431270006ca7409c60c37cfed59572de04229f104ec723e6010ffa2b7163",
+  "select_bodies": "8e6e61e083e6097535da3b98d41b607b40fc81b72bbd8c7fb903618c5b35c568",
+  "select_components": "3e6cc847b334e92ce7ec5e5f35dfa929572e0974239790d76563ca4e20b26789",
+  "select_faces_edges": "7b99b5370b1647bf8cea57df7a1053caab641c2f4a94c4d797b9679e6f38d6f1",
+  "select_features": "b050bc19ce86d135cbe50998be681555110e92e179c4c7b101170c6b62c19943",
+  "select_parts": "569adc5595a64187411d8ffeea69eab3b76ddfa33aeead6fd728efdd993bcccc",
+  "select_sketch": "b0605b34a14d4173f7ed80d877109ec0b891a1b395bcab5743a603ed2eae240a",
+  "send": "f83b6cdab792f9567a81d46d7828ed20795513c57a2c7d00fbbe6bd14d2f5848",
  "settings": "9193dd3a1007c43660d0d47b6499cb2571338b67949e1a99df112057b9bf2b8a",
+  "settings_keyboard": "4968c70788094365af9c6e2b1c15b2aac45cf21212a14b8a256daf1ffe17f41a",
+  "settings_monitor": "6fcea26e2fc1673c76c6e7fadac4a91812ed43250cfb363c4f40c0cacfbd7aa5",
+  "settings_mouse": "47754752ea6fb37ec9686c0460740935a4db30fb267f1136a9246aec9a17b3f1",
+  "settings_palette": "a060015a750ff4367c65c04b83bf43720e13a38d8dee35330e1d8880f89eaa22",
+  "settings_plug": "79c00b84b2d1d28e3bf6096639c75476b7e1ee0a326c34ad76a79ad866c0102e",
  "sheet": "774e30923ef6f37dd9c0b2bc3e45705e83b3a76700bf071cd41155a365d0daa4",
  "sheet_rules": "5d3a2f37d3b4a4262b3ddbdae53d61f29e0f8e284dd54006da25a7acebfa1114",
  "shell": "a1959ea0d0441a479bf654b6e549e2e44a0bfdc9cda4eb46fe1fbfd884de7e38",
+  "shield": "5e2d2d157309e0daa72f7c53073dfdb0a474def972a041cd172567f1d1e485ec",
  "silhouette": "2a848aed2f247b1c0439f830a34a513c93bc5493c40044c821d493d863ad996e",
  "sketch": "b52e5862b1709a9a7e3ca00d7436d126fbfc01b38080006fa4e17dc581dfa103",
  "sketch_break": "67a5fab332616e6d6a9aeae3bedc04ee0768179143ba34b795bdd98cea04bb24",
@@ -261,7 +317,13 @@
  "status_error": "b7188fcdfadf1512ddd2896805a14618179789f87047b219560a7dab74bd360f",
  "status_warning": "1ac4f0ccfac2c01f6f66cb42188f9ae053c4aef9c5bbd249f1fb09611eb4d825",
  "stitch": "6c3205d64007b771ed78d6f8055867578439fb25d591563b32dbd3343c98732d",
+  "stop": "36967eb4d423370d0d6c679b0a71f8d09f4fb2c73eed3e8cc50c604c44b0c32b",
  "style": "6c2b04234b82ea4858c80190cc7208c60f549358253005afc35ab4e29506b578",
+  "style_hidden_edges": "a707dfc0bdcabe9144865f569abfcb478e493143cbd4331efc1404cf3082f6d2",
+  "style_shaded": "6e5f8f9a9030ab3717f8b2192bbfd3f6b515ad398acf6cb41bc24f1298bc73b4",
+  "style_shaded_edges": "6c2b04234b82ea4858c80190cc7208c60f549358253005afc35ab4e29506b578",
+  "style_translucent": "c46b0cd485cfb9023514908357048b5cba9017a0c4976239da1e98f50e4ab5f9",
+  "style_wireframe": "af7e575d378b5b6850bee9d3ca384efab95c8d4c876c5e3524f3ea771c4380a3",
  "suppress": "c54fbc01c12c0175d78cd63f692e8aaf73fc2cac79752b2a3ad821ac32734343",
  "surface": "ba0e839ce0ee03e7ff95a2389a5ecb20bd80c713064d9b1bd5f461f4a80d1921",
  "surface_blend": "0642f3b4af7d22f379a3c74f54c7b1c9eef0bdda19372ce4df73c0e56bdd7bbc",
@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <title>Ambient occlusion</title>
+  <g opacity="0.22"><path d="M13 51L51 51A38 38 0 0 0 13 13Z" fill="currentColor" stroke="currentColor" stroke-width="0" stroke-linejoin="round" stroke-linecap="round"/></g>
+  <g opacity="0.38"><path d="M13 51L40 51A27 27 0 0 0 13 24Z" fill="currentColor" stroke="currentColor" stroke-width="0" stroke-linejoin="round" stroke-linecap="round"/></g>
+  <g opacity="0.62"><path d="M13 51L29 51A16 16 0 0 0 13 35Z" fill="currentColor" stroke="currentColor" stroke-width="0" stroke-linejoin="round" stroke-linecap="round"/></g>
+  <path d="M13 10L13 51L54 51" fill="none" stroke="currentColor" stroke-width="5.6" stroke-linejoin="round" stroke-linecap="round"/>
+</svg>
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <title>Display</title>
+  <path d="M10 22L54 22M10 42L54 42" fill="none" stroke="currentColor" stroke-width="5.6" stroke-linejoin="round" stroke-linecap="round"/>
+  <circle cx="24" cy="22" r="10.5" fill="#ffffff"/>
+  <circle cx="42" cy="42" r="10.5" fill="#ffffff"/>
+  <circle cx="24" cy="22" r="6.4" fill="currentColor"/>
+  <circle cx="42" cy="42" r="6.4" fill="currentColor"/>
+</svg>
@@ -0,0 +1,5 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <title>Grid</title>
+  <path d="M12 12L52 12L52 52L12 52Z" fill="none" stroke="currentColor" stroke-width="5.6" stroke-linejoin="round" stroke-linecap="round"/>
+  <path d="M25.3 12L25.3 52M38.7 12L38.7 52M12 25.3L52 25.3M12 38.7L52 38.7" fill="none" stroke="currentColor" stroke-width="4" stroke-linejoin="round" stroke-linecap="round"/>
+</svg>
--- a/Show More
+++ b/Show More