made changes

config.py

@@ -62,14 +62,14 @@ def get_llm() -> LLM:
         # Free tier available: https://openrouter.ai
         # Note: For Hugging Face Spaces, set OPENROUTER_API_KEY as a secret
         if not OPENROUTER_API_KEY:
-            # Try to use without key (some free models might work)
-            # But it's better to set the key for reliability
-            print("Warning: OPENROUTER_API_KEY not set. Some models may not work.")
-            print("Get a free key at https://openrouter.ai")
+            raise ValueError(
+                "OPENROUTER_API_KEY environment variable is not set. "
+                "Get a free key at https://openrouter.ai"
+            )
+        # CrewAI uses LiteLLM internally, so we need to format as openrouter/model-name
         return LLM(
-            model=OPENROUTER_MODEL,
-            base_url="https://openrouter.ai/api/v1",
-            api_key=OPENROUTER_API_KEY if OPENROUTER_API_KEY else "free"
+            model=f"openrouter/{OPENROUTER_MODEL}",
+            api_key=OPENROUTER_API_KEY
         )
     
     else: