test: add vanilla regression baselines

Capture rendered-text and visual baselines before route migration, and detect external CSS dependencies. Do not change verify.mjs assertions; task 02 must remove the known legacy font URL before the audit can pass.

.agents/snapshots/skills.txt

@@ -0,0 +1,45 @@
+AI For Dummies — Skills
+← ROUTE MAP
+03 / SKILLS
+review desk ↗
+Reusable judgment
+Teach the
+decision.
+A skill changes behavior. Keep the trigger precise, put the workflow in
+SKILL.md
+, and move conditional facts, scripts, and examples into focused files.
+Package anatomy
+One job.
+More than
+one
+file.
+Choose a file to see why it belongs in the package.
+REVIEW-UI / SKILL PACKAGE
+├── SKILL.md
+trigger + workflow
+├── references/
+conditional facts
+├── scripts/
+deterministic checks
+└── assets/
+templates + examples
+Create a skill
+Observe →
+trigger →
+validate
+01
+Observe friction
+Find a repeated decision or failure.
+02
+Define the trigger
+Say when it should load and when it should stay out.
+03
+Choose anatomy
+Use references for facts and scripts for deterministic mechanics.
+04
+Evaluate behavior
+Test realistic prompts, edge cases, safety, and evidence.
+Agents & trees →
+Rules case study →
+Review submitted skills →
+Full guide: skill forge →