* fix(native-chat): a kill that reached the agent ends it, so the next message goes through
After Stop, tab close, idle rest or workspace sleep, Orca force-kills the
agent. It used to accept the old agent as gone only when it saw the exit
report within about a second; otherwise every later message re-ran the kill
and was refused with "Couldn't stop {agent} from before." A kill delivered to
the agent itself now ends it and releases the chat with kill-delivered
evidence; the refusal remains only when the kill could not reach the agent.
When writing the chat's journal fails and the following kill can't be
confirmed, recovery now records the close with its fault instead of silently
returning, so the turn no longer stays Working and later sends retry the stop.
Tracked in STA-12354 and STA-12355.
* Preserve provider kill evidence across cleanup retries
* Exercise ACP setup gate with real managed teardown
* fix: preserve Claude writer termination evidence through settlement
* test: consolidate termination evidence contracts
* fix: restore Pi connection exit listener contract
* test: load actual ACP teardown before timed cases
* fix: correct lifecycle contract typing and test boundaries
* test: make Claude piped fixture mock types portable
* test: expect supervised OpenCode probe teardown
* test: align remaining supervised teardown expectations
* fix: align Stop feedback with terminal writer evidence
* test: remove redundant mocked Codex continuation case
* fix: keep adapter declaration and Stop fixture checks portable
* test: keep Stop fixture clock unchanged
* test: read canonical provider handle when reopening Stop journal
Brennan Benson
98f5d13689