Add activity-core LLM endpoint support

llm_connect/factory.py

@@ -2,7 +2,8 @@
 Factory for creating LLM adapters by provider name.
 """
 
-from typing import Optional, Dict, Any
+import os
+from typing import Optional, Dict, Any
 
 from llm_connect.adapter import LLMAdapter
 from llm_connect.exceptions import LLMConfigurationError
@@ -57,5 +58,10 @@ def create_adapter(
         return cls(model=model, api_key=api_key, system_prompt=system_prompt, **kwargs)
     elif provider == "claude-code":
         return cls(model=model, **kwargs)
-    else:
-        return cls(**kwargs)
+    elif provider == "mock":
+        mock_response = os.environ.get("LLM_CONNECT_MOCK_RESPONSE")
+        if mock_response is not None and "mock_response" not in kwargs:
+            kwargs["mock_response"] = mock_response
+        return cls(**kwargs)
+    else:
+        return cls(**kwargs)