feishu-topic-spawn

Create a new topic in a Feishu topic-group, and optionally add the first in-thread reply (with optional @mention) by sending as the user. Use when the user says things like ‘开话题’, ‘/topic’, ‘开个新话题’, ‘在话题里回一条’, or asks to simulate a ChatGPT-style ‘new chat’ workflow inside a Feishu topic-group. In a Feishu topic-group, a top-level send creates the topic; replying with `reply_in_thread=true` posts inside that topic.