Add agent registration, heartbeats, and monitoring (Phase 4)
Master side:
- Register RPC: identity-bound (agent-rift → rift), allowlist check,
max nodes limit, upserts node in registry, updates agent pool
- Heartbeat RPC: derives node name from MCIAS identity (not request),
updates container count and last-heartbeat timestamp
- HeartbeatMonitor: background goroutine checks for missed heartbeats
(90s threshold), probes agents via HealthCheck, marks unhealthy
Agent side:
- HeartbeatClient: connects to master via env vars (MCP_MASTER_ADDRESS,
MCP_MASTER_CA_CERT, MCP_MASTER_TOKEN_PATH), registers on startup
with exponential backoff, sends heartbeats every 30s
Proto: added Register and Heartbeat RPCs + messages to master.proto.
Architecture v2 Phase 4.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Kyle Isom
6351b68ef6