refactor: trim over-engineering (ponytail-audit)

- ws → devDependencies (src uses type-only; runtime comes via @fastify/websocket)
- delete bot/index.ts barrel; import casual-brain/driver directly
- untrack tsconfig.tsbuildinfo (already gitignored)
- vanillaCandidates: push-loop → .map()

94 tests pass, build clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/server/package.json

@@ -19,7 +19,6 @@
     "fastify": "^5.2.0",
     "js-chess-engine": "^2.4.6",
     "pino": "^9.5.0",
-    "ws": "^8.18.0",
     "zod": "^3.24.0"
   },
   "devDependencies": {
@@ -28,6 +27,7 @@
     "pino-pretty": "^11.3.0",
     "tsx": "^4.19.2",
     "typescript": "^5.6.0",
-    "vitest": "^3.0.0"
+    "vitest": "^3.0.0",
+    "ws": "^8.18.0"
   }
 }

packages/server/src/bot/candidates.ts

@@ -27,11 +27,7 @@ function vanillaCandidates(game: Game, color: Color): CandidateMove[] {
   const moves = game.chess.moves({ verbose: true }) as Array<{
     from: Square; to: Square; promotion?: PromotionType;
   }>;
-  const out: CandidateMove[] = [];
-  for (const m of moves) {
-    out.push({ from: m.from, to: m.to, promotion: m.promotion });
-  }
-  return out;
+  return moves.map((m) => ({ from: m.from, to: m.to, promotion: m.promotion }));
 }
 
 function blindCandidates(game: Game, color: Color): CandidateMove[] {

packages/server/src/bot/index.ts

@@ -1,7 +0,0 @@
-export type {
-  Brain, BrainInput, BrainAction, BrainInitArgs,
-  CandidateMove, AttemptHistoryEntry,
-} from './brain.js';
-export { CasualBrain } from './casual-brain.js';
-export { BotDriver } from './driver.js';
-export { legalCandidates } from './candidates.js';

packages/server/src/server.ts

@@ -12,7 +12,8 @@ import {
 } from './games.js';
 import { attachSocket } from './ws.js';
 import { createGameSchema } from './validation.js';
-import { CasualBrain, BotDriver } from './bot/index.js';
+import { CasualBrain } from './bot/casual-brain.js';
+import { BotDriver } from './bot/driver.js';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 

packages/server/test/integration/ai-game-casual.test.ts

@@ -7,7 +7,8 @@ import {
 } from '../../src/games.js';
 import { attachSocket } from '../../src/ws.js';
 import { createGameSchema } from '../../src/validation.js';
-import { CasualBrain, BotDriver } from '../../src/bot/index.js';
+import { CasualBrain } from '../../src/bot/casual-brain.js';
+import { BotDriver } from '../../src/bot/driver.js';
 import type { ServerMessage } from '@blind-chess/shared';
 
 let app: ReturnType<typeof Fastify>;

packages/server/tsconfig.tsbuildinfo

@@ -1 +0,0 @@
-{"root":["./src/commit.ts","./src/games.ts","./src/ratelimit.ts","./src/server.ts","./src/state.ts","./src/translator.ts","./src/validation.ts","./src/view.ts","./src/ws.ts"],"version":"5.9.3"}