Session-Close Brain MCP Bridge for Unified Intelligence

Decision

Enhanced session-close skill with Phase 3.5 (Brain MCP Bridge) — every Claude Code session now submits quality learnings, errors, and decisions to Brain MCP after local memory writes. This bridges the gap between Claude Code local intelligence (session-learnings.md, error-playbook.md) and the shared CIOS nervous system (Brain MCP). All surfaces (Claude Code, Paperclip agents) now feed and read from Brain.

Rationale

Without the bridge, Claude Code session intelligence was trapped in local files — Paperclip agents couldn’t learn from live debugging sessions, and Claude Code didn’t absorb agent overnight discoveries. Brain MCP is the shared nervous system; session-close is the natural contribution point for Claude Code sessions.

Alternatives Rejected

None documented

Outcome

Notification Intelligence Engine deployed and verified. Telegram notifications dropped from ~30/hour to near-zero routine messages. 3 heartbeat tasks completed silently during testing — all buffered correctly. End-to-end digest test passed: peek (3 entries) → format (238 chars) → send (msg_id=129) → clear (0 remaining). Anomaly false positive caught and fixed (verdict-only checking). Buffer safety pattern (peek→send→clear) prevents data loss on send failure. Rate limiter active. All 5 components working as designed.