Fix: agents should be object, not array

start.sh

@@ -149,17 +149,16 @@ CONFIGEOF
 # Gateway token
 CONFIG_JSON=$(echo "$CONFIG_JSON" | jq ".gateway.auth.token = \"$GATEWAY_TOKEN\"")
 
-# Add agents array with model configuration
-CONFIG_JSON=$(echo "$CONFIG_JSON" | jq ".agents = [
-  {
-    \"id\": \"main\",
+# Add agents object with model configuration
+CONFIG_JSON=$(echo "$CONFIG_JSON" | jq ".agents = {
+  \"main\": {
     \"kind\": \"main\",
     \"sandbox\": \"require\",
     \"defaults\": {
       \"model\": \"$LLM_MODEL\"
     }
   }
-]")
+}")
 
 # Control UI origin (allow HF Space URL for web UI access)
 if [ -n "$SPACE_HOST" ]; then