feat: Open Brain v1.0 -- semantic knowledge server

[rodaddy]

Summary

• Complete MCP server with 6 tools: log_thought, log_decision, search_brain, find_person, session_save, session_load
• PostgreSQL + pgvector backend with LiteLLM embeddings (gemini-embedding-001, 768 dims)
• Role-based auth (admin, agent, discord, n8n, readonly) with bearer tokens
• StreamableHTTP transport with per-session MCP server instances
• Content hash deduplication on embeddings
• Health check fix: auth header for LiteLLM proxy
• SessionEnd capture hook for automatic knowledge ingestion

Phases Completed

1. Foundation (DB, auth, logging, migrations)
2. Core Tools (log_thought, log_decision, search_brain)
3. Secondary Tools (find_person, session_save, session_load)
4. Operational Hardening (health checks, graceful shutdown, CI)
5. Consumer Integration (hooks, Discord capture, mcp2cli)

What's Next

PAI integration (wiring session-wrap, session-start, continuous capture) will be handled in skippy-agentspace as a consumer integration phase.

Test plan

• bun test passes all unit tests
• bun run typecheck clean
• Health endpoint returns 200 with LiteLLM auth
• MCP tools callable via mcp2cli
• Session hooks fire on session start/end/compaction

🤖 Generated with Claude Code