agent_registry.authenticate_and_register owns the full handshake
(rate-limit -> HMAC -> allowed-IPs/anomaly -> new-IP -> version ->
register) and ingest_agent_state owns heartbeat/sysinfo/capability
side-effects; the WS namespace and long-poll endpoints become thin
adapters translating error codes to emit/disconnect vs jsonify/status.
The per-IP auth limiter moves to the registry (re-exported from the
gateway for existing callers/tests). Gate: parametrized ws/poll matrix
(bad HMAC, blocked IP, rate limit, new-IP anomaly) + a word-anchored
ratchet that the adapters never re-grow the sequence.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
