ARCHITECTURE_FREEZE_CHECKLIST.md

ARCHITECTURE_FREEZE_CHECKLIST — eMCP

Use this checklist before starting Phase 1 implementation.

1. Contract Completeness

• PRD.md, SPEC.md, TOOLSET.md are mutually consistent.
• Gate A/B/C boundaries are explicit and conflict-free.
• Namespace governance and ecosystem extension rules are finalized.
• initialize metadata contract is mandatory and versioned.

2. Security Baseline

• THREAT_MODEL.md attack trees reviewed and approved.
• SECURITY_CHECKLIST.md mapped to planned tests.
• Model field allowlist policy is complete for all allowlisted models.
• Error formatter contract (401/403/409/413/415 + trace_id) is fixed.

3. Runtime Governance

• Tool uniqueness and handle uniqueness rules are frozen.
• Rate-limit identity resolver algorithm is frozen.
• Idempotency hash and conflict policy is frozen.
• Streaming activation policy (stream.enabled) is frozen.

4. Release/BC Governance

• SemVer and Public Contract Stability sections approved.
• Golden fixture governance (version bump + changelog + CI guard) approved.
• Deprecation policy for breaking changes approved.
• Upstream compatibility policy (laravel/mcp ^0.5.x) approved.

5. Process Readiness

• Formal platform audit (PLATFORM_AUDIT.md) approved.
• Ownership assigned for platform, security, and release decisions.
• Phase 1 backlog items trace to frozen contracts.
• Any open architectural question has owner + resolution date.

Freeze Decision

• Date: 2026-02-19
• Status: APPROVED
• Baseline: architecture contract frozen for Gate B start
• Change rule: contract updates require explicit SemVer-aware version bump + changelog entry