feat(bot): POST /api/games instantiates CasualBrain + BotDriver

packages/server/src/server.ts

@@ -8,9 +8,11 @@ import {
   chooseSide,
   createGame,
   pruneFinished,
+  attachBotDriver,
 } from './games.js';
 import { attachSocket } from './ws.js';
 import { createGameSchema } from './validation.js';
+import { CasualBrain, BotDriver } from './bot/index.js';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
@@ -45,13 +47,28 @@ fastify.post('/api/games', async (req, reply) => {
     reply.code(400);
     return { error: 'malformed', detail: parsed.error.issues };
   }
-  const { mode, side, highlightingEnabled } = parsed.data;
+  const { mode, side, highlightingEnabled, vsAi } = parsed.data;
+
+  // Phase 1: only 'casual' is implemented. 'recon' returns 503.
+  if (vsAi && vsAi.brain === 'recon') {
+    reply.code(503);
+    return { error: 'ai_offline', detail: 'recon bot not yet implemented' };
+  }
+
   const creatorSide = chooseSide(side);
-  const { game, creatorToken } = createGame({ mode, creatorSide, highlightingEnabled });
+  const { game, creatorToken } = createGame({ mode, creatorSide, highlightingEnabled, vsAi });
+
+  // For AI games, wire the bot.
+  if (vsAi && game.aiOpponent) {
+    const brain = new CasualBrain({});
+    const driver = new BotDriver({ game, brain, color: game.aiOpponent.color });
+    await driver.init();
+    attachBotDriver(game.id, driver);
+  }
 
   const publicBase = PUBLIC_BASE
     || (req.headers.host ? `${req.protocol}://${req.headers.host}` : '');
-  const joinUrl = `${publicBase}/g/${game.id}`;
+  const joinUrl = vsAi ? null : `${publicBase}/g/${game.id}`;
   return { gameId: game.id, creatorToken, creatorColor: creatorSide, joinUrl };
 });