tmux answers non-allowlisted users with 'access not allowed' on stderr
and exit 0 for every command (verified 3.3a/3.5a, two users), so
has-session reports any target as existing. party status claimed
uninvited group members were joined, party leave silently 'succeeded',
and party list printed bogus '0 attendee(s)' rows. New party_conn_state
(ok/unauthorized/dead) classifies by message content; list now shows
'invite-only (ask <host>)'.
veg
f3209e39d1