Beacon within 60s. The scheduler is turning and the mesh can hear it.
Silent 60s–10m. Slowing, partitioned, or under load — look before it goes dark.
Silent over 10m. Often still self-reporting healthy — this is the station that lies.
reds/s is BEAM reductions per second, the node's own work pulse. A container healthcheck answers an HTTP probe and says healthy whether or not the transport moves a single packet; only a running scheduler emits reductions. Verdicts compare the realm's monotonic clock against each beacon's arrival, so a station with a wrong wall clock cannot make itself look fresh.