# 0028 — Chunk 3 closure: update skills-index, update spec, behavioral tests

**Type:** HITL  
**Parent PRD:** `docs/prd/chunk-3-skills-library.md`

## What to build

Close out Chunk 3 once all 42 skills are complete: update the skills index to reflect the implemented state, update the living spec, and run the full behavioral acceptance test suite.

**Tasks:**
1. Update `docs/research/ai-coding-factory/ai-coding-factory-skills-index.md` — replace the pre-implementation build reference with the as-implemented state: actual flat skill names, categories, trigger descriptions as deployed, any deviations from the original index noted
2. Update `docs/spec/overview.md` — reflect the full 42-skill library as the current deployed state; remove "Chunk 3 target" language; mark Chunk 3 ✅ complete
3. Update `docs/spec/architecture.md` — reflect the `.agents/evals/` directory structure added in Chunk 3; any other structural changes from implementation
4. Update `docs/ROADMAP.md` — mark Chunk 3 ✅ complete in the chunk table
5. Run behavioral acceptance tests — for each skill, invoke with its trigger phrase in a fresh Claude session and verify the output meets the authoring standard; document results

**Behavioral test scope:** All 42 skills (including `write-eval`, `write-skill`, and the 4 preserved skills). The `caveman` skill is exempt — it has no content-generating behavior to verify.

**LESSONS.md:** Extract any cross-session learnings from Chunk 3 implementation and add entries per the LESSONS.md format. Three or more observations on the same pattern graduate to the relevant standing file.

## Acceptance criteria

- [ ] `docs/research/ai-coding-factory/ai-coding-factory-skills-index.md` updated to reflect as-implemented state; deviations from original plan noted
- [ ] `docs/spec/overview.md` updated; Chunk 3 marked ✅ complete; all 42 skills listed as deployed
- [ ] `docs/spec/architecture.md` updated with `.agents/evals/` structure
- [ ] `docs/ROADMAP.md` Chunk 3 row updated to ✅
- [ ] Behavioral test run completed; all skills pass their trigger test; failures documented as issues for resolution
- [ ] `LESSONS.md` updated with Chunk 3 observations
- [ ] **HITL:** human verifies the complete skills library in a fresh session before marking Chunk 3 done

## Blocked by

- 0020 (design skills)
- 0021 (implement skills)
- 0022 (test skills)
- 0023 (review skills)
- 0024 (deploy skills)
- 0025 (operate skills)
- 0026 (IaC skills)
- 0027 (cross-cutting skills)