feat: introduce common agent state definitions and update README metadata.

README.md

@@ -7,5 +7,6 @@ sdk: gradio
 sdk_version: 6.0.1
 app_file: app.py
 pinned: false
+python_version: 3.11
 ---
 

src/credentialwatch_agent/agents/common.py

@@ -1,11 +1,14 @@
 from typing import TypedDict, List, Optional, Any, Dict, Annotated
 import operator
 
+from langchain_core.messages import BaseMessage
+from langgraph.graph.message import add_messages
+
 class AgentState(TypedDict):
     """
     Common state for agents.
     """
-    messages: List[Dict[str, Any]]
+    messages: Annotated[List[BaseMessage], add_messages]
     # Add other common fields if needed
 
 class ExpirySweepState(TypedDict):