# Quality Checklist: Supply Chain Hardening — SHA-Pin GitHub Actions

**Change**: 260321-73w3-supply-chain-sha-pin
**Generated**: 2026-03-21
**Spec**: `spec.md`

## Functional Completeness
- [x] CHK-001 Immutable Action References: All 5 external actions use 40-char commit SHAs, not mutable tags
- [x] CHK-002 Tag Comment Preservation: Each SHA-pinned line ends with `# vN` comment

## Behavioral Correctness
- [x] CHK-003 Functional Equivalence: SHAs resolve to same code as original tags (verified by matching tag to SHA)

## Scenario Coverage
- [x] CHK-004 All external actions pinned: Exactly 5 external `uses:` directives are SHA-pinned
- [x] CHK-005 No unpinned external refs: No external action uses a mutable tag

## Code Quality
- [x] CHK-006 Pattern consistency: SHA + comment format is consistent across all 5 references
- [x] CHK-007 YAML validity: `release.yml` is valid YAML after changes

## Security
- [x] CHK-008 Supply chain immutability: Action references cannot be altered by upstream force-push
- [x] CHK-009 Internal actions unchanged: `wvrdz/` org actions are not pinned (intentional)

## Notes

- Check items as you review: `- [x]`
- All items must pass before `/fab-continue` (hydrate)
- If an item is not applicable, mark checked and prefix with **N/A**: `- [x] CHK-008 **N/A**: {reason}`
