The intake and secretary agent ids are each a single fixed id, so two
concurrent start_intake_session / start_secretary_session calls raced on
the container name (docker run --name roboco-agent-<id>) and the
_instances[<id>] write: both passed the reap-prior check before either
registered, both ran docker run, and the last _instances write won,
orphaning the other container + its relay.
Add _intake_spawn_lock / _secretary_spawn_lock (asyncio.Lock) and wrap the
_spawn_intake_container / _spawn_secretary_container bodies so the second
start waits for the first to fully register before its own reap-prior check
runs. Distinct from self._lock (which stop_agent takes) to avoid a
reentrancy deadlock: the spawn body holds the spawn lock then calls
stop_agent (acquires self._lock) — lock order is always spawn_lock ->
self._lock, never the reverse.
The non-blocking spawn (start_intake_session / start_secretary_session)
schedules _spawn_intake_container_guarded / _spawn_secretary_container_guarded
via _schedule_bg. Those run docker run and only register in _instances at the
END. If shutdown arrived between docker run and the registration line, the
container was started but the orchestrator had no handle — stop() iterates
only _instances, so the container was orphaned (leaked, manual docker rm).
Worse, the F070 drain could let the spawn coroutine complete the
registration AFTER stop() already iterated _instances, landing a live
container into a shutting-down registry nothing tears down.
Add a post-docker-run shutdown guard in _spawn_intake_container and
_spawn_secretary_container: re-check self._running after _run_container_cmd
returns; if the orchestrator began shutting down, remove the just-started
container (by its deterministic name) and raise _SpawnAbortedDuringShutdown
WITHOUT registering. The guarded wrappers catch that BEFORE except Exception
and close the live relay silently (shutdown is not a user-facing failure,
no error pushed to the SSE stream). The F070 stop() drain awaits the bg
spawn coroutine, so the abort surfaces cleanly.
TOCTOU-safe: between the _running check and the _instances assignment there
is no await (config + instance construction are sync), so once the check
passes, registration completes before the event loop can interleave stop().
The normal running path is unchanged (sanity tests pin it).
Renn F