The canonical PR review/merge workflow already lives in
skills/llm-project-workflow/workflows/review-merge-pr.md and is exposed
through mcp_list_project_skills / mcp_get_skill_guide (#333-#335), and
its final-report schema already demands a workflow version. What was
missing is enforcement: add compute_workflow_hash (short sha256
version hash of workflow text) and assess_review_workflow_source to
review_proofs. Review reports must cite the canonical workflow file
and carry a populated Workflow version field; when the current
canonical hash is supplied, a mismatched citation fails as a stale
workflow copy, directing the agent to reload via mcp_get_skill_guide.
Fails closed. Tests cover hash determinism and content sensitivity,
matching-hash pass, missing citation, missing version field, stale
hash, version none, and offline validation without a canonical hash.
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
