[AlexGeslani]

Incident

GitHub Pages deployed the multiplayer client without a reachable WebSocket backend. The client attempted wss://vector-sigma-works.github.io/ws, received 404, and left Create/Join nonfunctional.

Repair

• route GitHub Pages to the explicit production WebSocket endpoint
• gate Create/Join on real socket readiness
• support an exact, validated origin allowlist for Pages and LAN production
• cache-bust the repaired room client
• add production endpoint and connection-state regressions

Verification

• npm test: 246/246 passed
• Caddy active-version config validation: passed
• production runtime and public two-browser acceptance are required after merge before incident closure