A Structured spawn gets no tmux pane: the daemon starts the adapter in
the session cwd with the session env (including MAESTRO_SESSION_ID and
MAESTRO_URL), runs the handshake, and records the ACP session id on the
sidecar. An adapter that cannot come up still yields a session, Dead
with activity Error and the reason as activity_detail, so a missing
adapter reads as the install command in the sidebar rather than as a
session that never appeared.
The liveness pass checks a structured session's child instead of the
tmux list. kill sends session/cancel, waits, then SIGTERMs through the
ACP handle. SessionManager::shutdown ends every adapter concurrently
and marks those sessions Dead on disk. take_acp_updates hands #135 the
raw session/update stream once, with earlier notifications still queued.
Miguel Palhas
b1718559df