# DeepSeek Harness

> Source: <https://github.com/deepseek-ai/deepseek-harness>
> Published: 2026-08-13 12:58:02+00:00

English | [中文](/deepseek-ai/deepseek-harness/blob/master/README.zh.md)

DeepSeek Harness (`dsh`

) is an open-source agent harness developed by [DeepSeek AI](https://deepseek.com).

It uses an architecture where **everything is a plugin**, and is powered by [Cordis](https://github.com/cordiverse/cordis), whose design is described in [ A Programming Paradigm for Spatiotemporal Composability](https://github.com/cordiverse/paper).

DeepSeek Harness is currently in *developer preview* and is iterating rapidly. **THERE WILL BE COMPATIBILITY-BREAKING CHANGES.**

Install `Node.js`

, then run:

```
npx @deepseek-ai/dsh web
```

The command starts the Web UI, served at `http://127.0.0.1:3080`

by default. See [Web UI guide](/deepseek-ai/deepseek-harness/blob/master/docs/user/guide/index.md).

To run from a repository checkout:

```
git clone https://github.com/deepseek-ai/deepseek-harness.git
cd deepseek-harness
pnpm install
pnpm run build
pnpm dsh web
```

- Feel free to submit feedback or bug reports through
[GitHub Discussions](https://github.com/deepseek-ai/deepseek-harness/discussions). - Add the
topic to your plugin repository for discoverability.`dsh-plugin`

- Join
[DeepSeek Harness Discord community](https://discord.gg/Ycq5dCaS4).

See [CONTRIBUTING.md](/deepseek-ai/deepseek-harness/blob/master/CONTRIBUTING.md).

Start with the [development guide](/deepseek-ai/deepseek-harness/blob/master/docs/development.md) and [architecture documentation](/deepseek-ai/deepseek-harness/blob/master/docs/architecture.md).

For agents, follow [AGENTS.md](/deepseek-ai/deepseek-harness/blob/master/AGENTS.md).

Third-party dependencies and their licenses are disclosed in [THIRD_PARTY_NOTICES.md](/deepseek-ai/deepseek-harness/blob/master/THIRD_PARTY_NOTICES.md).