Witness alias → the frame topic (prefix) it observes on the host's
own perception stream. Every event trigger is a topic predicate over
SensorMixin.handleMessage — no global bus subscription. arrival
and departure share the movement topic and are disambiguated by the
room-occupant delta the framework computes.
Witness alias → the frame
topic(prefix) it observes on the host's own perception stream. Every event trigger is a topic predicate overSensorMixin.handleMessage— no global bus subscription.arrivalanddepartureshare the movement topic and are disambiguated by the room-occupant delta the framework computes.