When running in a Feishu thread-enabled group (话题群), every bot
response — status messages, approval prompts, streaming progress,
turn results — was sent via the Lark SDK's `create` API which spawns
a new standalone topic. The user sees a cluttered group with orphan
topics for each intermediate bot message.
Root cause: `sendText()` only called `client.im.message.create()`
with a bare `chat_id`, never passing any reply context. The Feishu
`reply` API was completely unused.
Fix (two changes, one site each):
1. **lib.mjs — incomingIdentity()**: expose `parentId`, `rootId`,
`threadId` from the raw Feishu message event so callers can
determine thread context. (Not consumed directly yet, but
available for future use.)
2. **index.mjs**:
- `handleIncomingMessage()`: store the latest incoming
`messageId` as `replyToMessageId` in the per-chat thread store.
- `sendText()`: look up `replyToMessageId` from the thread store;
when present, call `client.im.message.reply()` instead of
`create()`. This keeps ALL bot responses nested under the
original user message inside the same topic.
No config changes needed. New chats automatically start using the
reply path; existing chats without a `replyToMessageId` in the store
fall back to the old `create` behaviour.
/ 修复飞书话题群中 bot 消息新建独立话题的问题。所有回复改为使用 reply API
/ 在原话题内嵌套回复，而非通过 create API 创建新话题。
yuanchenglu
c0b82b6ec0