The heartbeat now carries capabilities (per protocol v2 update). On each heartbeat, capabilities are updated in the agent registry. On auto-heal (server restart), capabilities from the heartbeat are used instead of empty Map.of(), so the agent's feature flags (replay, routeControl, logForwarding, etc.) are restored immediately on the first heartbeat. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>