Formal review on GURU-5070: cargo fmt/clippy/test green (89 tests, 0 warnings); the 3 audit CRITICALs verified closed with no bypass; all security paths fail closed. Non-blocking follow-ups tracked (viewer-token logout revocation, delete dead validate_agent_key placeholder, X-Real-IP/log hygiene). Remaining for Phase-1 exit: Task 8 e2e verification + /gc-audit security re-audit. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>