Update app.py

app.py

@@ -61,10 +61,20 @@ class GAIAAgent:
     def __init__(self):
         hf_token = os.environ.get("HF_TOKEN")
         model_id = os.environ.get("GAIA_MODEL_ID")  # optional override
+        provider = os.environ.get("GAIA_PROVIDER", "hf-inference")  # optional override
+
+        # Fail fast and loud instead of letting all 20 questions die silently
+        # at Step 1 with a generic "api_key" error from deep inside smolagents.
+        print(f"HF_TOKEN present: {bool(hf_token)}")
+        if not hf_token:
+            raise RuntimeError(
+                "HF_TOKEN is not set in this process. Go to Space Settings > "
+                "Variables and secrets and confirm a secret named exactly "
+                "HF_TOKEN exists, then restart the Space (adding a secret does "
+                "not always hot-reload a running container)."
+            )
 
-        model_kwargs = {}
-        if hf_token:
-            model_kwargs["token"] = hf_token
+        model_kwargs = {"token": hf_token, "provider": provider}
         if model_id:
             model_kwargs["model_id"] = model_id
         model = InferenceClientModel(**model_kwargs)