Maintain Chatto's current runtime architecture inventory in docs/architecture/. Use when adding, changing, removing, auditing, or documenting runtime components, projections or snapshots, NATS and JetStream resources, subject namespaces and event types, runtime-state keys, durable effects, ConnectRPC or Operator API mounts, or realtime delivery architecture. By default, inspect the codebase, apply all in-scope inventory fixes, and validate them; report without editing only when the user or parent workflow explicitly requests an audit, review, report, or propose-only result.