feat(pilot): minimal AI review bot for Gitea Actions
Ships a working pragent pilot ahead of the framework build (design doc deferred). Single stdlib-only reviewer script fetched at runtime by a per-repo Gitea Action; reviews fire only on PRs with the AI-REVIEW label; model is glm-5.2:cloud via the on-network headroom proxy; fail-open. - pilot/ai_review.py: fetch PR diff, call model, post review as pragent-bot - pilot/workflow-template.yml: per-repo Gitea Action gated on AI-REVIEW label - pilot/README.md: onboarding (bot collaborator + secret + workflow + label) - tests/pilot/test_ai_review.py: 15 unit tests for pure helpers (no network) - README/design doc: note pilot is the bootstrap; framework build deferred Co-Authored-By: Claude <noreply@anthropic.com>
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# pragent pilot — AI Review bot
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A minimal AI code-review bot for Gitea, running as a CI step on the existing
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`act-runner`. This is the **pilot** — a small, self-contained reviewer that
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predates the full `pragent` framework (whose design lives in
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`docs/plans/2026-08-04-pragent-design.md`). The framework will later absorb
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this; until then, this is what runs.
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## How it works
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1. You add `pragent-bot` to a repo and commit `.gitea/workflows/ai-review.yml`.
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2. On a PR, you add the **`AI-REVIEW`** label.
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3. Gitea Actions runs the workflow on the `act-runner`; it fetches the PR diff,
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asks `glm-5.2:cloud` (on-network via the headroom proxy) to review it, and
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posts the findings back as a PR review authored by `pragent-bot`.
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4. Remove the label to stop re-reviews on further pushes.
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Fail-open: the job always exits 0 and never blocks CI. Errors become a short
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"review failed" comment.
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## Onboard a repo (3 steps)
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### 1. Add `pragent-bot` as collaborator
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Repo → Settings → Collaborators → Add → `pragent-bot` → permission **Write**.
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(Write is required to post reviews/comments.)
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Or via API (with an admin/owner token):
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```bash
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curl -X PUT -H "Authorization: token $OWNER_TOKEN" \
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-H "Content-Type: application/json" \
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-d '{"permission":"write"}' \
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"http://100.74.17.70:30000/api/v1/repos/OWNER/REPO/collaborators/pragent-bot"
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```
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### 2. Add the `PRAGENT_BOT_TOKEN` secret
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Repo → Settings → Actions → Secrets → New secret → name `PRAGENT_BOT_TOKEN`,
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value = the bot's access token (ask the platform admin; stored mode-600 at
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`~/.claude/.pragent-bot-token` on the admin host).
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### 3. Commit the workflow
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Copy `pilot/workflow-template.yml` into the target repo as
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`.gitea/workflows/ai-review.yml` and commit it. That's it.
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## Use it
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Open a PR (or push to an open one), add the **`AI-REVIEW`** label. The review
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appears within ~30–90s depending on diff size and model latency.
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## What's intentionally NOT in the pilot
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Deferred to the full framework (by design, see the design doc):
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- Attention tiering (trivial/lite/full/oversized) and per-tier cost control.
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- Multiple analyzer fan-out over a shared cached prompt prefix.
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- Prior-comment synthesis (so each push re-posts; the latest review is tagged
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with the head SHA so it's easy to spot).
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- Inline line comments and status checks.
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- `pragent explain` / `replay` / analytics JSONL.
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- A second forge (GitLab) and the provider matrix.
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## Pieces
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| File | Role |
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|---|---|
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| `pilot/ai_review.py` | The reviewer script (stdlib only). Single source of truth — fetched at runtime by each repo's workflow. |
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| `pilot/workflow-template.yml` | The Gitea Action consumers copy into `.gitea/workflows/ai-review.yml`. |
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| `tests/pilot/test_ai_review.py` | Unit tests for the pure helpers (no network). |
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## Run the tests
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```bash
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cd ~/Projects/pragent
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PYTHONPATH=pilot python3 -m pytest tests/pilot/ # if pytest available
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# or, without pytest:
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python3 - <<'PY'
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import os, sys, importlib.util
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sys.path.insert(0, os.path.abspath("pilot"))
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import ai_review # noqa: F401
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spec = importlib.util.spec_from_file_location("t", "tests/pilot/test_ai_review.py")
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m = importlib.util.module_from_spec(spec); spec.loader.exec_module(m)
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fails = 0
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for n in sorted(x for x in dir(m) if x.startswith("test_")):
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try: getattr(m, n)(); print("PASS", n)
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except Exception as e: fails += 1; print("FAIL", n, e)
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print("failed:", fails)
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PY
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```
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## Configuration knobs (env in the workflow)
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| Env | Default | Purpose |
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|---|---|---|
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| `OLLAMA_MODEL` | `glm-5.2:cloud` | Model id passed to the headroom proxy. |
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| `OLLAMA_MAX_TOKENS` | `6000` | Output token cap. |
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| `DIFF_MAX_CHARS` | `150000` | Diff truncation cap (with a noted truncation marker). |
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| `OLLAMA_URL` | `http://100.74.17.70:8789` | headroom proxy (tailnet). If the act-runner can't reach the tailnet IP, expose 8789 as an in-cluster Service+Endpoints and set this to the cluster DNS name. |
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