The operator no longer has to match the roster row count to the exact
player count (or watch the "empty seats will STALL" warning). Two
mechanisms:
1. PRESENCE BEACONS: the pod keeps its seat-request TCP connection open
for the process lifetime; the relay reads a live beacon as "seated"
and a pre-claim FIN frees the seat (no ghost seats -- a ghost stalls
every pod at the connection gate). Reservation expiry spares
beaconed seats.
2. TRIM-ON-LAUNCH (manual/GUI mode): operator LAUNCH before the roster
fills shrinks the session to the seats present -- egg [pilots]/pages
trimmed, seat ids REMAPPED by position (pods re-derive their host id
from their tag's roster position, so walk-up prefs and beacons re-key
consistently), roster/expected_ids shrink, eggs release, the launch
pair fires as ACKs land.
GUI: roster rows now update LIVE from the walk-up requests (SEAT n
PRESENT/FREED lines -> callsign/mech cells + a blue "seated" status
light), and LAUNCH MISSION enables from the first seated player with a
"starts with whoever is here" banner.
Verified 2-node: 2-of-4 trim ran the mission with the requested mechs;
and the mid-roster GAP case -- three joined, the middle player quit
pre-launch (beacon FIN freed the seat), trim remapped seat 4->3 with the
survivor's callsign/mech following, both survivors registered under the
remapped ids and ran the mission. Also: stdin reader guarded against
sys.stdin=None spawn shapes (the GUI QProcess pipe is the supported
operator channel).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
