INDEX.md
- No functions — this is a meta-index listing all 13 briefs with ID, title, phase, priority, status, and dependency chain
- Defines 3 reading orders: project understanding, implementation, architecture review
- Priority definitions: P0 (Critical/MVP - red), P1 (Important - yellow), P2 (Nice-to-have - green)
- Status flow: DRAFT → REVIEW → APPROVED → IMPLEMENTING → COMPLETE → DEPRECATED