Michael Grundberg and Claude Opus 5
90a95f562b
feat(session): publish and persist a local pane's agent exit
...
The mux layer now knows a pane's agent has exited. This puts it on the session
record, where the board and, later, the reboot restore can see it.
`SessionState.paneExit` carries `{ status?, signal?, at }` and rides the
existing `session:updated` broadcast through `toState()`. No new SSE event. The
server pulls each answer from `mux.getPaneExit()` rather than off a broadcast
payload, so the raw reading never reaches a browser: for a remote or docker
session that reading is the death of an ssh client or a `docker exec`, not of
the agent.
The field is tri-state, and the third state is its absence: `undefined` means
Codeman does not know, and it never reads as alive. `Session.setPaneExit()`
forces that unknown for every shape a dead local pane does not describe. A
direct-PTY session owns no pane. A remote SSH session's local pane holds the
ssh client, whose death means a transport drop OR an exit, which is the
ambiguity PR #355 settled by not guessing. A docker case's local pane holds a
`docker exec` into the container's own tmux. And a session rebuilt from the
socket has no provenance at all: `reconcileSessions()` gives it a synthetic
`restored-<fragment>` id that matches no `state.json` entry, so a remote
session rediscovered after `mux-sessions.json` was lost arrives with no
`remote` field and looks local — `MuxSession.discovered` marks it, and absent
metadata there counts as unproven rather than as proof. The scoping lives on
`Session` rather than in `TmuxManager` so there is one copy of the rule.
`status` and `pid` are untouched. `status: 'error'` belongs to the PTY-exit
circuit breaker and makes the browser offer a restart, and a null `pid` is what
makes the browser re-attach and launch a fresh CLI. A reading that repeats the
previous answer writes nothing and broadcasts nothing.
An unknown answer never reads as alive, but a stale KNOWN one would keep
reading as exited, so `clearPaneExitForNewPane()` retracts it on every path
that puts a new command in the pane: the start/attach path, the `restartCli()`
relaunch behind a custom-model switch, and the remote reattach. Without the
second of those, switching an endpoint on an exited session launched a new
command and then persisted and broadcast the old exit straight back onto it.
`toState()` is also what `state.json` persists, so the record survives a
reboot, which is the only thing that does: a reboot takes the tmux server, and
with it every live signal and every `mux-sessions.json` entry. Nothing reads it
there yet — making the restore refuse such a session is a behavior change that
belongs with the part that closes them. Recovery threads the saved value back
through the constructor so the first persist after boot cannot blank it.
Refs Ark0N/Codeman#446 .
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com >
2026-09-21 10:01:09 +02:00
..
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