| 🟢 GREEN · ok | measured on the live thing within the door's cadence (the note says how long ago), and every rule held | nothing to do |
| 🟡 YELLOW · degraded | measured, but something does not add up, or the watcher cannot see (two faces disagree · a tree that is not its commit · a receipt older than a check · CHALLENGED) | look within a day |
| 🟡 YELLOW · stale | the evidence is too old to trust (a receipt past its cadence · an edge copy instead of the origin) | re-measure |
| 🔴 RED · down | broken, or the goal is not met (pins or counts moved · no answer · the lanes still in io) | fix it: this is the work |
| ◌ UNKNOWN | not measured yet (a new door before its first beat) | wait one beat |
| ⏸ PAUSED | not tracked, by Justin's word, so its numbers are not to be believed | nothing, until he tracks it |
| flagged | a TRACKED door that CHANGES to anything but green pages Slack once, on the change, never every beat; every change is written to the transitions log |