def send_message(self, user_message: str) -> anthropic.types.Message:
    """
    Sends a user message to Claude and returns the response.

    Args:
        user_message: The user's input message

    Returns:
        Claude's response message object
    """
    # Add user message to conversation history
    self.conversation_history.append({
        "role": "user",
        "content": user_message
    })

    # Prepare API call parameters
    api_params = {
        "model": self.model,
        "max_tokens": 4096,
        "system": self.system_prompt,
        "messages": self.conversation_history
    }

    # Add tools if available
    if self.tool_schemas:
        api_params["tools"] = self.tool_schemas

    # Call Claude API
    response = self.client.messages.create(**api_params)

    # Add assistant's response to conversation history
    self.conversation_history.append({
        "role": "assistant",
        "content": response.content
    })

    return response

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