diff --git a/bin/sidechat_manager.py b/bin/sidechat_manager.py
index 60823d3..fb6b548 100644
--- a/bin/sidechat_manager.py
+++ b/bin/sidechat_manager.py
@@ -14,10 +14,13 @@ import time
 import json
 
 def _ev(ws, js, await_result=True):
-    """Evaluate JS via CDP, return result."""
+    """Evaluate JS via CDP, return result.
+    Uses id=1 to match muse-chat-api.py's ev() on shared websocket.
+    Fixed 2026-10-04: was using id=100, causing response mismatch.
+    """
     import json as _json
     ws.send(_json.dumps({
-        "id": 100, "method": "Runtime.evaluate",
+        "id": 1, "method": "Runtime.evaluate",
         "params": {"expression": js, "awaitPromise": True}
     }))
     resp = _json.loads(ws.recv())