dsh-feishu

dsh-feishu — Feishu (Lark) IM bridge for DeepSeek Harness

Pluggable cordis plugin wiring a Feishu self-built bot into a running DeepSeek Harness (dsh) web profile — installable via dsh plugin add.

┌────────┐   WS    ┌──────────────┐   cordis    ┌──────────┐    LLM    ┌──────────┐
│ Feishu │ ──────> │  this plugin │ ──────────> │ dsh agent │ ────────> │ DeepSeek │
│  IM    │ <────── │              │ <────────── │          │ <──────── │          │
└────────┘   API   └──────────────┘  events     └──────────┘  stream   └──────────┘

Features

• One Feishu DM user ↔ one persistent dsh session (feishu:<open_id>).
• Multi-turn conversations across reconnects.
• Streams assistant replies back into Feishu, chunked at 4000 chars.
• Filters DeepSeek <|DSML|...> tool-call markers from outbound text.
• Interactive-question bridging. ask_user_question payloads (with their options) are rendered as plain chat text and the turn is unblocked immediately — otherwise the tool hangs until the watchdog fires, because it only accepts answers from the dsh web browser client.
• Progress updates. Once a turn has run past 45s, newly produced assistant text is flushed to the chat every 30s, so long jobs are no longer silent.
• Watchdog. A stalled turn is force-cancelled with a notice to the user; the timeout is configurable (30 min default).
• Pure ESM, no TypeScript compile step.
• No telemetry, fully local.

Installation

1. Install dsh

npm install -g @deepseek-ai/dsh
dsh web --help

2. Install the plugin

dsh plugin add dsh-feishu

This installs the plugin into ~/.dsh/profiles/web/node_modules/dsh-feishu and patches cordis.patch.yml automatically.

3. Configure your Feishu app

Create a Custom App at https://open.feishu.cn/app and copy appId + appSecret.

Under Event Subscriptions (事件与回调):

• Set mode to Receive events via persistent connection (使用长连接接收事件/回调).
• Add the event im.message.receive_v1.

Under Permissions (权限), grant:

• im:message
• im:message.p2p_msg (required for DMs)

Publish a version (发布版本) — without this the bot cannot receive events. Wait ~2 minutes after publishing.

4. Export env vars and run

export DEEPSEEK_API_KEY="sk-..."
export FEISHU_APP_ID="cli_..."
export FEISHU_APP_SECRET="..."

dsh web

You should see in logs:

[feishu] WebSocket started (appId=cli_xxx)
[feishu] FeishuBridgeService initialized

DM the bot anything — the agent will reply in the same conversation.

Environment variables

Variable	Required	Default	Notes
DEEPSEEK_API_KEY	yes (LLM)	—	https://platform.deepseek.com
DEEPSEEK_BASE_URL	no	https://api.deepseek.com	For proxies
FEISHU_APP_ID	yes	—	cli_xxx from app console
FEISHU_APP_SECRET	yes	—	From app console — never commit
DSH_FEISHU_WATCHDOG_TIMEOUT_MS	no	1800000 (30 min)	Force-cancel threshold for a stalled turn
DSH_FEISHU_PROGRESS_AFTER_MS	no	45000	How long a turn runs before progress updates start
DSH_FEISHU_PROGRESS_INTERVAL_MS	no	30000	Minimum gap between two progress updates

How a message flows

1. User DMs the bot.
2. Feishu SDK fires im.message.receive_v1 → this plugin.
3. Plugin loads/creates the agent for feishu:<open_id>.
4. Plugin calls agent.followup(userMessage).
5. When agent returns to idle, plugin reads agent.session.events, strips DSML noise, and posts the reply via larkClient.im.message.create(...).
6. While the turn runs, a 2s polling watchdog does two jobs: an unsettled ask_user_question call is bridged to the chat (question + options) and the turn is cancelled to unblock it; a turn running past the threshold gets its new assistant text flushed as a "progress" message. Both share one seq cursor with the final reply, so no text is ever sent twice.

Limitations

• Text only. Image / file / card / post messages are not handled.
• No token-level streaming. Replies are still sent as whole blocks; during a long turn you only get periodic progress updates (see above).
• No groups yet. DMs only.
• Interactive UI tools are degraded. ask_user_question / exit_plan_mode only accept answers from the dsh web client. Over IM the plugin renders the question as text and cancels the turn, and injects an environment notice so the model prefers asking in prose.

License

MIT.

Acknowledgments

• DeepSeek Harness (dsh) — the agent runtime this plugin extends.
• @larksuiteoapi/node-sdk — official Feishu (Lark) SDK, MIT licensed.
• DeepSeek API — LLM backend.

Author

王嘉楠 (itr-del) — 13918029394@163.com

Built while integrating dsh with a self-hosted Feishu bot on Ubuntu 22.04.

📖 Open-sourcing story: PUBLISHING.md — how this repo got published and listed.

中文文档见 README.zh.md。

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👤 关于这个项目的我

我做这个的原因：DeepSeek Harness 的会话在浏览器里，用它做日常工作的门槛太高——我想让它直接出现在飞书对话里。

我负责的部分：整个插件——cordis 插件结构、飞书长连接、会话与 open_id 映射、流式回传与分片、工具调用标记过滤、交互式提问桥接、进度心跳、看门狗超时。

技术选择的关键取舍：交互式提问那个坑最典型——ask_user_question 只认浏览器端应答，所以在飞书里会直接把回合挂死。我的取舍是把它降级成纯文本问答并立即放行，牺牲一点结构化，换回合不卡死。

做完之后的收获：做"桥接"类工具时，目标端的异常行为比接口本身更决定成败。

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