diff --git a/ttstoy/webui/app.py b/ttstoy/webui/app.py
index f0b4b9b..b515a90 100644
--- a/ttstoy/webui/app.py
+++ b/ttstoy/webui/app.py
@@ -1248,6 +1248,17 @@ def api_register_token():
         data.get("guild_id", ""),
         data.get("guild_name", ""),
     )
+    guild_id = data.get("guild_id", "")
+    if guild_id:
+        try:
+            state = _read_json(SHARED_STATE_FILE) if SHARED_STATE_FILE.exists() else {}
+            ugm = state.setdefault("user_guild_map", {})
+            ugm[str(data["user_id"])] = guild_id
+            with open(SHARED_STATE_FILE, "w") as f:
+                json.dump(state, f)
+            log.debug(f"api_register_token: persisted user_guild_map[{data['user_id']}]={guild_id}")
+        except Exception as e:
+            log.warning(f"api_register_token: could not persist user_guild_map: {e}")
     return jsonify({"token": token})