The controller now starts a CHAT-01 `engine-exit` stop when the engine
exits on its own. engineExitCohort proves the cohort from the shim's
recorded engine identity (pid, start ticks, boot) and an empty member
list, under a 5 s deadline that frees the escalation slot. A proven stop
releases the scope; anything else ends `uncertain`. close() no longer
signals a stopped binding.
Dewey built it. Filbert (27087) and Darkwing (27088) approved round 1 on
CHAT-01 cc83ee4f and manifest deac7434 (6 files). Sage's gate on
c92cfb8f plus the candidate: conversation 182/0, webui 22/0,
control-board 124/0, every scripts/test-*.sh 0 failed (task 98/0),
chat-01 PASS.
Co-Authored-By: Claude Opus 5.5 <[email protected]>