irisandClaude Opus 5
50f9b956d9
A session adopted at a backend start keeps the transcript's last status, so one whose process had been reported gone and was then found again read as `exited` while its CLI was running. `exited` is the word that draws the phone's Start button and lets `start_session` build a driver, so Start was accepted every time it was pressed -- and since starting replaces the driver without retiring the old one, each press left another reader on the same process. Every line the CLI wrote was then translated once per reader: three presses put three interleaved copies of one reply on screen, which is what it was reported as. So `exited` is now checked against `session::process`, the one authority on whether a process exists, in `launch` and again in `start_session`. A record that is not known to be dead makes it false, and what replaces it is `unknown` -- there is a process, and nothing here has heard from it, which is the answer `status_of_unlaunched` already gave to the same question. The correction goes out through the sink rather than into the manager's view alone, or the list and the session screen would disagree about it in the way this same button did a commit ago. A driver that `start_session` replaces now gets `Driver::detach`, which already existed for the backend going away and is the whole of what a driver whose process has exited is owed. On the phone the process button is disabled while its own request is in flight, so a second press cannot be decided against a status the first has not changed yet. That is a courtesy rather than the fix; the server refuses it either way, because a phone that has lost the stream cannot be relied on to know. Verified against a stand-in CLI, with the state forced by hand: before, three Starts returned 204 and left four readers on one process and the status still `exited`; after, the session reports `unknown` on both surfaces and all three are refused. Then driven on the emulator -- Stop, Start, Stop, Start alternated correctly with one process at a time, and the list, the transcript and the record all agree. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>