ChargeEvidence was the rule violated four times in one type: a side door
past the gate, the decider probing sysfs on the clock, the driver
interpreting, and nothing leaving tick(). Its comment cited bearer —
another instance of itself.
SensorSource::Charge now enters through sensor_input like every other
source, reported by sensord on a 30s poll off /sys/class/power_supply.
conclude_charge lives on the machine as its one decision; source health,
freshness and Absent/Down come from the gate for free. The 5s clock probe
is gone, the driver type is gone, and sensord ships x86_64 too: the
laptop has a battery.
sensord hung off graphical-session.target, which nothing on this device
starts, so it was enabled and dead from every boot. Down starts from a
last-seen stamp and structurally cannot see that. Bind the reporter to
sessiond and make the machine say so.
blueline-proximity-lock is 113 lines of shell implementing a subtle contract
(heartbeat inside SOURCE_DOWN_AFTER, seed from the probe banner, report both
edges) that would have been hand-copied for light and again for accel. One
binary, one contract, shipped in the package instead of the rootfs overlay.
