jyapayne/houserules
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feat(server): add authoritative game session per room (P4.5)

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Each room owns a ChessEngine wrapped in a GameSession; only the server
calls insert/retract/fireRules and all EntityIds are minted server-side.
GameSessionRegistry keys sessions by room code so two rooms cannot
observe or collide with each other's working-memory state.

GameSession.applyMove validates algebraic inputs, finds the matching
legal move via ChessEngine.findMove, applies it, and returns a fact-
level diff (inserted/retracted) plus the new turn and terminal state.
Terminal states are sticky: further moves after checkmate/draw return
GAME_OVER rather than silently mutating a dead session.

Exposes @paratype/chess's headless surface (ChessEngine, coord helpers,
schema types) via a new package entry point; the React app continues to
import concrete modules directly.
This commit is contained in:
Joey Yakimowich-Payne 2026-04-16 17:17:42 -06:00
commit f37c0934aa
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6 changed files with 576 additions and 3 deletions
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packages/server/package.json
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@ -8,6 +8,7 @@
"typecheck": "tsc --noEmit"
},
"dependencies": {
"@paratype/chess": "workspace:*",
"@paratype/rete": "workspace:*",
"pino": "^9.0.0",
"zod": "^3.23.0"