Agent Skill + MCP server for Supabase Realtime/CDC: bounded subscription primitive that fits Edge Function isolate budgets, pgvector composition, eval-first methodology with pre-registered thresholds.
Agent Skill + MCP server that gives an LLM agent a **bounded primitive for reacting to Postgres row-changes** (and coordinating over Realtime broadcast channels) on Supabase. Deploys as an Edge Function. Ships pre-registered eval thresholds and four ADRs documenting the load-bearing tradeoffs. The headline pattern is **agent-watches-database**: the agent calls a tool that blocks until either `max_events` arrive *or* `timeout_ms` elapses, then returns the batch. No streaming protocol, no persiste