lark-im

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

Chat (oc_xxx)
├── Message (om_xxx)
│   ├── Thread (reply thread)
│   ├── Reaction (emoji)
│   └── Resource (image / file / video / audio)
└── Member (user / bot)

Important Notes

AppLink and Share Links

Prefer CLI-returned links: use chat_app_link to open joined conversations, message_app_link to open messages, and share_link to invite others to groups. If manually building a joined-conversation AppLink, use https://<applink_host>/client/chat/open?openChatId=<oc_xxx>, never chatId=<oc_xxx> or lark://...chat_id=<oc_xxx>.

Identity and Token Mapping

• --as user means user identity and uses user_access_token. Calls run as the authorized end user, so permissions depend on both the app scopes and that user's own access to the target chat/message/resource.
• --as bot means bot identity and uses tenant_access_token. Calls run as the app bot, so behavior depends on the bot's membership, app visibility, availability range, and bot-specific scopes.
• If an IM API says it supports both user and bot, the token type changes who the operator is. The same API can succeed with one identity and fail with the other because owner/admin status, chat membership, tenant boundary, or app availability are checked against the current caller.

Sender Name Resolution

When fetching messages (+chat-messages-list, +threads-messages-list, +messages-mget, +messages-search), the CLI shows a display name for both user and bot senders:

• Server-provided name: the read APIs return sender_name (plus the full-i18n sender_i18n_names map) on each message sender; the CLI surfaces it as the sender's name for users and bots alike. No name lookup and no extra permission are needed — no contact scope and no application:bot.basic_info:read.
• Fallback to id: when the server does not provide a name, the sender is shown by its id and the command still exits 0. There is no contact-directory fallback.

The raw sender_name is not duplicated in output (its value is in name); the full sender_i18n_names map (all locales) is preserved for consumers that need a specific language, alongside an optional open_bot_id (ou_) for bot senders aligned with the message-receive event channel. System messages (msg_type: system) have no sender name — that is normal, not an error.

Default message enrichment (reactions / update_time)

The four message-pulling shortcuts (+messages-mget, +chat-messages-list, +messages-search, +threads-messages-list) automatically attach a reactions block and (for edited messages) update_time to each returned message — no separate im.reactions.batch_query call is needed. Pass --no-reactions to opt out. For the full contract (output shape, the im:message.reactions:read scope requirement, and the "missing field ≠ fetch failure" data rules), read references/lark-im-message-enrichment.md [blocked].

Compact message output (--concise)

Some message-listing shortcuts support --concise for compact Markdown output. Use it when the user asks for concise output or a smaller result/file; check --help for availability and do not combine it with an explicit --format, an enabled --json, or a non-empty --jq.

Opt-in resource auto-download (--download-resources)

+chat-messages-list, +messages-mget, and +threads-messages-list accept --download-resources to save eligible attachments into ./lark-im-resources/ and add a resources array to each message. It is off by default; stickers are not downloadable. A failed attachment is reported on that resource without aborting the message pull. Use +messages-resources-download [blocked] for one attachment. See references/lark-im-message-enrichment.md [blocked] for the output contract.

Folder resources are containers, not files — a folder file_key cannot be downloaded directly. Expand it first with lark-cli im files folder --recursive --file-key <folder_key> --srctype message --srcid <message_id>, then download the files inside with +messages-resources-download [blocked].

Card Messages (Interactive)

Before sending, replying with, or updating any interactive card (+messages-send / +messages-reply / messages.patch), you MUST read references/card/lark-im-card-create.md [blocked] and follow its workflow. The card JSON passed to --msg-type interactive --content (send/reply) or messages.patch --data (update) must be the output of that workflow — never hand-write or copy a card payload.

Card messages (interactive type) are not yet supported for compact conversion in event subscriptions. The raw event data will be returned instead, with a hint printed to stderr.

interactive cards support callback events (card.action.trigger) — see references/lark-im-card-action-reply.md [blocked].

Audio Messages

--audio sends a voice message and supports only Opus audio files, for example .opus files or Ogg Opus (.ogg) files. For mp3, wav, or other non-Opus audio, either convert to .opus first and keep using --audio, or send the original file as an attachment with --file.

Sending Doc Content as a Message

When sending content fetched from a Lark doc as a message, fetch the doc with --doc-format im-markdown, then send it as a message using the --markdown format. The fetched content is already in markdown; in any content-forwarding scenario, keep the fetched original text and send it in the --markdown format. Note: if the doc contains a cite tag with type="user", keep it as-is and do not strip the tag.

Flag Types

Flags support two layers:

• Message-layer flag: (ItemTypeDefault, FlagTypeMessage) — regular message bookmark
• Feed-layer flag: (ItemTypeThread/ItemTypeMsgThread, FlagTypeFeed) — thread as feed-layer bookmark

Item types for feed-layer flags:

• ItemTypeThread (4) = thread in a topic-style chat
• ItemTypeMsgThread (11) = thread in a regular chat

Feed Shortcut

Feed shortcuts add chats to the current user's feed sidebar. They are distinct from flags:

• Flag = bookmark on a message/thread, scoped to the user's bookmark list.
• Feed shortcut = entry in the user's feed sidebar (currently only chats).

Key limits:

• Only CHAT-type (feed_card_id is oc_xxx) is exposed via OpenAPI; doc/app/subscription shortcuts exist internally but are not yet whitelisted.
• All three operations (create/remove/list) are user-identity only — they sign with user_access_token.
• Batch size is 10 per call for create/remove; list is a one-page wrapper with opaque page_token pagination.

Shortcuts（推荐优先使用）

Shortcut 是对常用操作的高级封装（lark-cli im +<verb> [flags]）。有 Shortcut 的操作优先使用。

API Resources

lark-cli schema im.<resource>.<method>   # 调用 API 前必须先查看参数结构
lark-cli im

重要：使用原生 API 时，必须先运行 schema 查看 --data / --params 参数结构，不要猜测字段格式。

chats

• create — 创建群。Identity: bot only (tenant_access_token).
• get — 获取群信息。Identity: supports user and bot; the caller must be in the target chat to get full details, and must belong to the same tenant for internal chats.
• link — 获取群分享链接。Identity: supports user and bot; the caller must be in the target chat, must be an owner or admin when chat sharing is restricted to owners/admins, and must belong to the same tenant for internal chats.
• update — 更新群信息。Identity: supports user and bot.

chat.members

• create — 将用户或机器人拉入群聊。Identity: supports user and bot; the caller must be in the target chat; for bot calls, added users must be within the app's availability; for internal chats the operator must belong to the same tenant; if only owners/admins can add members, the caller must be an owner/admin, or a chat-creator bot with im:chat:operate_as_owner.
• delete — 将用户或机器人移出群聊。Identity: supports user and bot; only group owner, admin, or creator bot can remove others; max 50 users or 5 bots per request.

chat.user_setting

• batch_query — 批量查询当前用户在群内的个人偏好设置 (e.g. is_muted mutes normal messages, is_mute_at_all mutes @all messages); up to 10 chats per request. Identity: user only (user_access_token); the caller must be in each target chat.
• batch_update — 批量更新当前用户在群内的个人偏好设置 (e.g. is_muted mutes normal messages, is_mute_at_all mutes @all messages); up to 10 chats per request. Identity: user only (user_access_token); the caller must be in each target chat.

chat.nickname

• get — 获取自己的群昵称。Get your own nickname in the chat (self-only). Identity: user only (user_access_token); returns an empty string when no nickname is set.
• update — 设置自己的群昵称。Set or update your own nickname in the chat (self-only). Identity: user only (user_access_token); nickname must be a non-empty string (max 300 bytes). Use DELETE to clear it.
• delete — 清空自己的群昵称。Clear your own nickname in the chat (self-only). Identity: user only (user_access_token).

chat.join_requests

• list — 列出群的待审批入群申请（仅群主/管理员，user_access_token）。List pending join requests for a chat. Identity: user only (user_access_token); the caller must be the chat owner or an admin. Paginated (page_size 1-100); stop on has_more == false — page_token is returned even on the last page, so paging while it is present never terminates.
• handle — 批量审批入群申请（approve/reject，仅群主/管理员，user_access_token）。Approve or reject pending join requests in bulk (1-50 items, processed in order). Identity: user only (user_access_token); the caller must be the chat owner or an admin. results[] mirrors items[] in count and order — check each result (success / failed / already_handled); exit 0 does not mean every item succeeded.

chat.managers

• add_managers — 指定群管理员。Identity: supports user and bot; only the group owner can add managers; max 10 managers per chat (20 for super-large chats), and at most 5 bots per request.
• delete_managers — 删除群管理员。Identity: supports user and bot; only the group owner can remove managers; max 50 users or 5 bots per request.

chat.moderation

• get — 获取群成员发言权限。Identity: supports user and bot; the caller must be in the target chat and belong to the same tenant.
• update — 更新群发言权限。Identity: supports user and bot; only the group owner (or creator bot with im:chat:operate_as_owner) can update; the caller must be in the chat.

messages

• read_status — 批量查询当前用户对消息的已读状态。Identity: user only (user_access_token); accepts up to 50 message IDs and returns readable items plus invalid message IDs.Must-read [blocked]
• delete — 撤回消息。Identity: supports user and bot; for bot calls, the bot must be in the chat to revoke group messages; to revoke another user's group message, the bot must be the owner, an admin, or the creator; for user P2P recalls, the target user must be within the bot's availability.
• forward — 转发消息。Identity: supports user and bot.
• merge_forward — 合并转发消息。Identity: bot only (tenant_access_token).
• read_users — 查询消息已读信息。Identity: supports user and bot; the caller must still be in the chat. A user can query messages they sent within the last 7 days, while a bot can query only messages sent by that bot within the last 7 days.Must-read [blocked]
• patch — 更新已发送的消息卡片。Update an interactive message card sent by the app. Identity: supports user and bot; the message must have been sent within the last 14 days, and content must be a JSON-serialized string no larger than 30 KB.Must-read [blocked]
• urgent_app — 发送应用内加急。Identity: bot only (tenant_access_token); the bot must be the message sender and must be in the conversation that contains the message.
• urgent_phone — 发送电话加急。Identity: bot only (tenant_access_token); the bot must be the message sender and must be in the conversation that contains the message.
• urgent_sms — 发送短信加急。Identity: bot only (tenant_access_token); the bot must be the message sender and must be in the conversation that contains the message.

reactions

• batch_query — 批量获取消息表情。Identity: supports user and bot.Must-read [blocked]
• create — 添加消息表情回复。Identity: supports user and bot; the caller must be in the conversation that contains the message.Must-read [blocked]
• delete — 删除消息表情回复。Identity: supports user and bot; the caller must be in the conversation that contains the message, and can only delete reactions added by itself.Must-read [blocked]
• list — 获取消息表情回复。Identity: supports user and bot; the caller must be in the conversation that contains the message.Must-read [blocked]

threads

• forward — 转发话题。Identity: supports user and bot.

images

• create — 上传图片。Identity: supports user and bot; user identity requires im:resource scope on the UAT.

files

• create — 上传文件。Identity: supports user and bot; user identity requires im:resource scope on the UAT.

pins

• create — Pin 消息。Identity: supports user and bot.
• delete — 移除 Pin 消息。Identity: supports user and bot.
• list — 获取群内 Pin 消息。Identity: supports user and bot.

feed.groups

• batch_add_item — Batch add feed cards to a feed group. Identity: user only (user_access_token).Must-read [blocked]
• batch_query — Batch query feed groups. Identity: user only (user_access_token).Must-read [blocked]
• batch_remove_item — Batch remove feed cards from a feed group. Identity: user only (user_access_token).Must-read [blocked]
• create — Create a feed group. Identity: user only (user_access_token).Must-read [blocked]
• delete — Delete a feed group. Identity: user only (user_access_token).Must-read [blocked]
• update — Update a feed group. Identity: user only (user_access_token).Must-read [blocked]

权限表