Two features: 1. SQL query action for agents via execute MCP tool — read-only, curated views, LIMIT/timeout, SELECT-only validation 2. Split read/write SQLite connection pools — writeDB (1 conn) + readDB (8 conns) to eliminate SQLITE_BUSY Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>