lark-im

SKILL.md

Send and receive messages, manage group chats, and handle files in Lark IM.

Supports messaging workflows: send/reply to messages, search chat history, batch fetch messages by ID, and manage emoji reactions and message pins

Group chat operations include create, list, search, update name/description, and manage members (add/remove users and bots)

File and media handling: upload images, download files with automatic chunked support for large files (8MB chunks), and forward messages or threads

Bookmark messages or threads at message or feed layer; send in-app, SMS, and phone urgent notifications (bot identity only)

Works with both user and bot identities; user identity typically has broader contact and chat access, while bot identity requires explicit app visibility and membership settings

im (v1)

CRITICAL — 开始前 MUST 先用 Read 工具读取 ../lark-shared/SKILL.md，其中包含认证、权限处理

Core Concepts

Message: A single message in a chat, identified by message_id (om_xxx). Supports types: text, post, image, file, audio, video, sticker, interactive (card), share_chat, share_user, merge_forward, etc.

Chat: A group chat or P2P conversation, identified by chat_id (oc_xxx).

Thread: A reply thread under a message, identified by thread_id (om_xxx or omt_xxx).

Reaction: An emoji reaction on a message.

Flag: A bookmark on a message or thread.

Feed Shortcut: A chat pinned to the current user's feed sidebar, identified by feed_card_id (an oc_xxx open_chat_id for CHAT type).

Feed Group: A tag that groups feed cards in the feed list, identified by feed_group_id (ofg_xxx). Members are feed cards, each identified by feed_id + feed_type. Two types: normal (members managed explicitly) and rule (members auto-derived from rules).

Resource Relationships