AI Agent 已具备执行真实操作的能力，已从「文本生成」跨入「行动执行」阶段；
What is AI and how does it work?，更多细节参见旺商聊官方下载
{"user_content": "rename app to Hello", "tool_name": "change_app_title", "tool_arguments": "{\"title\": \"Hello\"}"}，这一点在服务器推荐中也有详细论述
const writer = writable.getWriter();