fix

config.py

@@ -0,0 +1,28 @@
+import os
+import dotenv
+from typing import Optional
+
+# Load environment variables from .env file if it exists
+dotenv.load_dotenv()
+
+def get_required_env(key: str, error_message: Optional[str] = None) -> str:
+    """Get a required environment variable or raise a helpful error."""
+    value = os.getenv(key)
+    if not value:
+        default_message = (
+            f"{key} environment variable is not set.\n"
+            f"Please create a .env file in the project root with:\n"
+            f"{key}=your_{key.lower()}_here\n\n"
+            f"If you don't have an API key:\n"
+            f"1. Go to https://makersuite.google.com/app/apikey\n"
+            f"2. Create a new API key\n"
+            f"3. Add it to your .env file"
+        )
+        raise ValueError(error_message or default_message)
+    return value
+
+# Required environment variables
+GOOGLE_API_KEY = get_required_env("GOOGLE_API_KEY")
+
+# Optional environment variables with defaults
+AGENT_MODEL_NAME = os.getenv("AGENT_MODEL_NAME", "gemini-2.0-flash")