agno-lark

A lightweight Python bridge between Lark/Feishu IM and Agno AgentOS.

agno-lark (import package: agno_lark) runs as an independent bridge process. It uses the official lark-channel-sdk WebSocket channel to receive Lark/Feishu messages, forwards them to an AgentOS agent, team, or workflow, and stores deduplication, session generations, and run records in SQLite.

flowchart LR
    U[Lark/Feishu user] --> C[FeishuChannel\nWebSocket]
    C --> B[agno-lark\nLarkInterface]
    B --> S[(SQLite\ndedup / sessions / runs)]
    B --> A[AgentOS\nagent / team / workflow]
    A --> B
    B --> C

The Chinese documentation is available in READM_ZH.md.

Features

• Persistent Lark/Feishu WebSocket connection; HTTP webhook mode is not required.
• Direct messages and group messages that mention the bot.
• Text replies, image resources, and file resources converted to Agno media objects.
• Remote AgentOS targets for agent, team, and workflow.
• User, chat, and thread session isolation with /new generation resets.
• Configurable group context:
  • user (default): each member who mentions the bot gets an independent context.
  • shared: members share one context for the same chat and thread.
• SQLite message deduplication, run records, TTL cleanup, WAL, and busy-timeout handling.
• Streaming Feishu cards with status, run ID, elapsed time, and cancellation actions.
• /new, /status, /cancel [run_id], and /help commands.
• User and chat allowlists, reconnect handling, error handling, and structured logging.

The first release does not process audio, video, or voice messages and does not implement HITL resume approval. Long-running tasks use foreground SSE streaming.

Requirements and installation

Python 3.12 or newer (and lower than 4.0) is required. uv is recommended:

uv sync
cp .env.example .env

After the first PyPI release, install the published package in an existing project with either:

uv add agno-lark
# or
python -m pip install agno-lark

The distribution name uses a hyphen (agno-lark), while Python imports use an underscore:

from agno_lark import LarkInterface, build_remote_target, load_settings

The package also installs the agno-lark command. After installation, run the bridge with:

agno-lark --help
agno-lark

Create the Lark/Feishu application

Create an enterprise application in the Lark or Feishu Open Platform and enable bot capabilities. Record the App ID (cli_...) and App Secret. Select the long connection (WebSocket) mode in event subscriptions and subscribe to message events. Grant the permissions required to receive and send messages, read image/file resources, and send card messages. Publish the application and add the bot to the target chats.

The official Channel SDK handles the WebSocket connection, event normalization, resource downloads, deduplication, and card callbacks. This project does not require a separate webhook endpoint.

Configuration

Copy .env.example and fill in the values below. The FEISHU_* prefix is retained for compatibility with existing Lark/Feishu application configuration; the distribution and import names are agno-lark and agno_lark.

FEISHU_APP_ID=cli_xxx
FEISHU_APP_SECRET=xxx

AGENTOS_URL=http://127.0.0.1:7777
AGENTOS_TOKEN=xxx
AGENTOS_TARGET_TYPE=agent
AGENTOS_TARGET_ID=assistant
# Legacy alias for an agent target:
# AGENTOS_AGENT_ID=assistant

FEISHU_STATE_DB=.data/agno-feishu.sqlite3
FEISHU_ALLOWED_USER_IDS=
FEISHU_ALLOWED_CHAT_IDS=
# user (default: one context per member) or shared (one context per chat/thread)
FEISHU_GROUP_SESSION_MODE=user

BRIDGE_HOST=127.0.0.1
BRIDGE_PORT=7788

Allowlist values are comma-separated. If both allowlists are empty, access is open; production deployments should configure at least one allowlist. AGENTOS_TOKEN may be empty for a public AgentOS, but a Bearer token is recommended for production.

FEISHU_GROUP_SESSION_MODE affects group chats only. In user mode, the scope includes sender.open_id; in shared mode, the scope includes the chat and thread but not the sender. Direct messages are always isolated by their direct-message chat. The default SQLite filename remains .data/agno-feishu.sqlite3 so existing state data can be reused.

Quick start with a remote AgentOS

Start AgentOS at AGENTOS_URL, then run the bridge:

uv run agno-lark
uv run agno-lark --host 0.0.0.0 --port 7788

The bridge creates a RemoteAgent, RemoteTeam, or RemoteWorkflow from AGENTOS_TARGET_TYPE and mounts the Lark/Feishu interface into the local AgentOS gateway. The status endpoint is GET /feishu/status; this path is retained for compatibility with existing deployments.

Embed in an existing AgentOS application

from agno.os import AgentOS
from agno_lark import LarkInterface, build_remote_target, load_settings

settings = load_settings()
target = build_remote_target(settings)
lark = LarkInterface(target=target, settings=settings)

agent_os = AgentOS(
    agents=[target] if settings.target_type == "agent" else None,
    teams=[target] if settings.target_type == "team" else None,
    workflows=[target] if settings.target_type == "workflow" else None,
    interfaces=[lark],
)
app = agent_os.get_app()

LarkInterface.get_router() returns a FastAPI APIRouter with a managed lifespan. Startup opens the SQLite store and connects FeishuChannel; shutdown disconnects the channel and closes the store. Only the asynchronous AgentOS execution path is supported. FeishuInterface remains exported as a compatibility alias.

Messages, sessions, and commands

• Direct messages are handled immediately; group messages must mention the bot.
• user_id is taken from sender.open_id.
• In the default user group mode, a scope can look like feishu:agent:assistant:chat_oc_xxx:thread_omt_xxx:user:ou_xxx:v3.
• In shared group mode, the same chat/thread uses a scope such as feishu:agent:assistant:chat_oc_xxx:thread_omt_xxx:v3 for every member, while each AgentOS run still receives the sender's user_id.
• /new increments the generation for the current user scope or shared chat/thread scope.

Cancellation first records cancel_requested and then calls the scoped AgentOS cancel endpoint. The final state comes from the SSE terminal event. Card actions re-check the operator and chat allowlists before starting status or cancellation work.

State database and troubleshooting

The default database .data/agno-feishu.sqlite3 uses WAL and a busy timeout. It contains schema_version, dedup_messages, session_scopes, and runs. Message deduplication defaults to 24 hours and run records are retained for 7 days.

If no messages arrive, check application publication, WebSocket subscriptions, bot membership, and allowlists. For 401/403 responses, check the AgentOS token, target ID, and AgentOS authorization. For resource failures, check Lark/Feishu resource-read permissions. Logs do not include the App Secret, AgentOS token, raw file contents, or complete user messages.

If your shell exports a SOCKS proxy and the local environment does not have socksio, set NO_PROXY=127.0.0.1,localhost (and the AgentOS hostname) when testing a local AgentOS. If outbound AgentOS requests must use a SOCKS proxy, install the HTTPX SOCKS extra in the deployment environment with uv pip install "httpx[socks]>=0.28,<1".

Development

uv sync
uv run pytest
uv run ruff check .
uv run mypy src
uv build
uv run agno-lark --help

Tests use fake Channel and Agno targets plus httpx mocks; they do not contact Lark/Feishu or AgentOS. See examples/agent_os_remote.py for the remote integration example.

Release and publish

The package will be published to PyPI as agno-lark. Every release version must be unique. Update version in pyproject.toml, then run the local checks and build:

uv lock
uv lock --check
uv sync --locked
uv run pytest
uv run ruff check .
uv run mypy src
uv build

For a first release or a manual release, create a PyPI API token and publish without putting the token in the repository or shell history:

export UV_PUBLISH_TOKEN='pypi-...'
uv publish

To verify a release on TestPyPI first, use a TestPyPI token and the TestPyPI upload endpoint:

export UV_PUBLISH_TOKEN='pypi-...'
uv publish --publish-url https://test.pypi.org/legacy/
uv pip install --index-url https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple/ agno-lark

This repository also includes a GitHub Actions workflow for PyPI Trusted Publishing. Configure the GitHub repository as a trusted publisher for the agno-lark project on PyPI, then push a tag such as v0.1.0; the workflow builds and publishes without a long-lived PyPI token.

Commit both pyproject.toml and uv.lock after every version change, even when dependencies have not changed. The lockfile includes the project's own version. uv version 0.1.2 updates the project version and re-locks it; if you edit the version manually, run uv lock before committing.

Create the release tag only after committing those files. If a tag's workflow fails because its lockfile is stale, rerunning that workflow still checks out the same tagged commit. Fix the files and publish a new version and tag, for example:

uv version 0.1.2
uv lock --check
uv sync --locked
uv run --locked pytest
uv run --locked ruff check .
uv run --locked mypy src
git add pyproject.toml uv.lock README.md READM_ZH.md
git commit -m "release: v0.1.2"
git tag v0.1.2
git push origin main
git push origin v0.1.2

License

This project is released under the MIT License. See LICENSE.