Checkpoint Eibenreith ink architecture

src/server-zcode.ts

@@ -272,7 +272,7 @@ io.on('connection', (socket) => {
 
   socket.on(
     'playerCommand',
-    async (data: { command?: string }) => {
+    async (data: { command?: string; requestId?: number }) => {
       const engine = sessions.get(socket.id);
       if (!engine?.isRunning()) {
         socket.emit('error', {
@@ -282,6 +282,7 @@ io.on('connection', (socket) => {
       }
 
       const input = String(data?.command ?? '').trim();
+      const requestId = Number(data?.requestId || 0);
       if (!input) return;
       debugLog(`playerCommand from ${socket.id}: ${input}`);
 
@@ -292,7 +293,10 @@ io.on('connection', (socket) => {
           paragraphs: turn.paragraphs.length,
           statusLine: turn.gameState?.statusLine,
         });
-        socket.emit('narrativeResponse', toClientTurn(turn));
+        socket.emit(
+          'narrativeResponse',
+          withClientRequestId(toClientTurn(turn), Number.isInteger(requestId) && requestId > 0 ? requestId : undefined),
+        );
       } catch (error) {
         console.error('[zcode] playerCommand error:', error);
         socket.emit('error', {