Update llm/agents.py

llm/agents.py

@@ -39,6 +39,10 @@ async def query_llm_agent(name: str, prompt: str, settings: dict) -> str:
     if not selected_model:
         return f"[{name}] No model selected."
 
+    # Auto-append ":free" if missing
+    if not selected_model.endswith(":free"):
+        selected_model += ":free"
+
     if selected_model not in ALLOWED_MODELS:
         return f"[{name}] Model '{selected_model}' is not supported."