M9.T2: API Stability Surface + Export Snapshot #206
Description
Phase A2 — API Stability Surface
Deliverables
docs/contracts/API_STABILITY.md- Public API snapshot (automated export audit)
- Automated API diff check in CI (snapshot-based)
Acceptance Criteria
- Public exports locked
- Deprecations require warning + migration note
- No accidental export churn
Part of M9 — IRONCLAD GA