Update agent.py

agent.py

@@ -125,6 +125,10 @@ class Agent:
         """Clear the conversation history."""
         self._history = []
 
+    def chat(self, user_input: str) -> str:
+    """Process user input and return the assistant's response."""
+    return self.execute(user_input)
+
     def available_strategies(self) -> List[str]:
         """Return a list of available strategy names."""
         return StrategyFactory.available_strategies()