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A leftover is dirt a run left behind. Four of the checks were reporting
something else: the machine part-way through work of its own, which it
finishes on its own a few seconds later. Each one failed a run that had
done nothing wrong.
laser.arm-wait-lid found it. The test passed every check it makes and
failed on cool=smoke/armed=False/hold=False. The smoke clear is the
engine's post-job work - run duty for smoke_s after an armed session,
timed, ending by itself (cool.c, Cool_Smoke) - and the machine was idle
fifteen seconds later without being asked. Armed and hold were both
false: nothing had been left.
The four, and what each was catching:
cool a phase alone (the smoke clear, a cooldown). Armed or
holding stays a leftover: the run left a job alive and the
engine is keeping the fans up for it.
controller the supervisor's own start. A takeover ends by starting
forgectrl again, and the respawn runs the liveness probe
and the lens reference before it reports running and
verified. The run had put it back.
state the ring draining to the end of a job. An underrun stays a
leftover and is still acknowledged with cnc/stop: that one
is the run's.
leds read_led read brightness, write_led writes target, and the
smooth trigger fades brightness toward target. An LED the
machine had already released still read lit mid-fade, and
the restore called itself done before the fade had moved.
Judged on target now: a run that left the button lit left
a target standing.
The waiting, the restoring and the reporting of anything a run actually
left are unchanged. What changed is which readings count as dirt.
Host-proven: 87 baseline unit tests, two of them new - a fading button
LED is not a leftover, a lit one is.