Complete dominoes integration with formal tournament rules:
- Double-six set (28 tiles), spinner rule (first double = 4-way branch)
- 2-player Draw Game (draw from boneyard when blocked, first to 100)
- 4-player Teams Block Game (pass when blocked, first to 150)
- All modes: local pass-and-play, VS bot (easy/medium/hard), online matchmaking, private rooms
- Full server-side validation (api/domino.php — play/draw/pass/round/match lifecycle)
- Bot AI with 3 difficulty levels (random, greedy-pip, strategic with opponent tracking)
- Supabase Realtime multiplayer via WebSocket
- CSS pip rendering, board layout with 4 directions, responsive tiles
- Database: domino_matches, domino_queue, RLS policies, game_plugins entry
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>