mara: the background worker is redundant if c0re knows when its own
sockets go missing. damocles: 10s poll latency and redundancy are two
faces of the same issue — poll adds a reconnect window and does
redundant work when c0re could react directly.
design: c0re owns the MCP listener lifecycle, so the only time a
listener disappears without c0re knowing is when c0re itself restarts.
- replace spawn_poll (recurring 10s loop) with sync_on_start (one-shot
sweep at daemon boot): re-registers all running agents on startup
after /run/hyperhive/agents/ is cleared by the tmpfs reset.
- run_reconcile (reconcile-start path): add coord.register_agent(name)
immediately after start_with_fallback — event-driven, no poll delay.
- run_create already calls register_agent eagerly; kill/destroy paths
already call unregister_agent — no changes needed there.
tracker: #2290
73f1020a7e