Requires spt-core **v0.39.1 or newer** and Oh My Pi **v16.3.15 or newer**. Update with `spt adapter update omp-spt`, then restart existing endpoints so they load the corrected extension.

### Fixed
- **Deaf sessions close instead of staying silently ONLINE.** A path-independent delivery watchdog now force-resubmits messages that remain stranded on an idle OMP session, exposes the degraded-comms rail if recovery continues, and fails the endpoint closed after sustained failure. This bounds issue #10 while its daemon-replay root cause remains under spt-core investigation.
- **Listener death invalidates cached endpoint activity.** State is republished after daemon or listener churn instead of being skipped from stale local cache.