Implementer les tours multiples

La cle pour savoir si Claude veut utiliser un outil est le champ stop_reason : quand il vaut "tool_use", Claude a besoin d’un outil.

La boucle de conversation

def run_conversation(messages):
    while True:
        response = chat(messages, tools=[get_current_datetime_schema])
        add_assistant_message(messages, response)
        print(text_from_message(response))

        if response.stop_reason != "tool_use":
            break

        tool_results = run_tools(response)
        add_user_message(messages, tool_results)

    return messages

Gerer plusieurs appels d’outils

def run_tools(message):
    tool_requests = [
        block for block in message.content if block.type == "tool_use"
    ]
    tool_result_blocks = []

    for tool_request in tool_requests:
        try:
            tool_output = run_tool(tool_request.name, tool_request.input)
            tool_result_blocks.append({
                "type": "tool_result",
                "tool_use_id": tool_request.id,
                "content": json.dumps(tool_output),
                "is_error": False
            })
        except Exception as e:
            tool_result_blocks.append({
                "type": "tool_result",
                "tool_use_id": tool_request.id,
                "content": f"Erreur : {e}",
                "is_error": True
            })

    return tool_result_blocks

Routage des outils

def run_tool(tool_name, tool_input):
    if tool_name == "get_current_datetime":
        return get_current_datetime(**tool_input)
    elif tool_name == "other_tool":
        return other_tool_function(**tool_input)

Cette approche rend l’ajout de nouveaux outils simple sans modifier la logique principale de conversation.