Add local CLAUDE.md to document repo context for AI agents

[MakiDevelop]

Why

This repo has no local CLAUDE.md. When an AI coding agent (Claude Code, Cursor, etc.) opens this repo, it has no immediate context on:

• What this repo is (6-layer deterministic knowledge pipeline, open-source distillation of a private mk-brain system)
• Its relationship to sibling projects (independent derivative, not a fork)
• Open-source constraints (English commit messages, no private data leakage, careful about maintainer-specific paths/credentials)
• Integration contract (/search HTTP endpoint is stable and meant to be called by external agents/orchestrators)

Without this context, agents may:

• Mistakenly treat it as part of a larger private stack
• Suggest changes that break the open-source contract
• Leak private-stack conventions into public commits

Proposed content (~50 lines)

A short CLAUDE.md covering:

1. Repo identity — what this is, who it's for, current stage
2. Relationship to upstream — derived from private mk-brain, but fully independent; no syncing, no shared state
3. Open-source conventions — English commits, no personal paths in examples, no credentials, no private API keys
4. Stability contract — /search endpoint signature should not break without major version bump (external orchestrators depend on it)
5. What NOT to add — private stack features (mem0 integration, Council Protocol, personal governance files)
6. Lab Notes section — known failure modes and successful patterns specific to this repo

Priority

Low — repo works fine without it. File this as technical debt / onboarding improvement.

Context

Surfaced during a governance audit of mk-brain on 2026-04-05. The private stack recently introduced a four-layer decision framework and agent routing protocol; we confirmed those belong upstream and should NOT leak into this public repo. A local CLAUDE.md is the cleanest way to enforce that boundary for future AI agent sessions.