DeepSeek Harness

August 14, 2026 · View on GitHub

English | 中文

DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI.

This repository is a community-maintained, unofficial desktop-distribution fork. It is not endorsed by DeepSeek. The original project is deepseek-ai/deepseek-harness.

It uses an architecture where everything is a plugin, and is powered by Cordis, whose design is described in A Programming Paradigm for Spatiotemporal Composability.

Developer preview

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

Run

Run from `npm`

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.

Run from source

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

Community and support

Feel free to submit feedback or bug reports through GitHub Discussions.
Add the dsh-plugin topic to your plugin repository for discoverability.
Join DeepSeek Harness Discord community.

Development

Start with the development guide and architecture documentation.

For agents, follow AGENTS.md.

License

MIT

Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.

The Harness source code is available under the MIT License, which permits commercial use, modification, and redistribution when the required copyright and license notices are retained. Third-party components remain subject to their own notices and license terms.

Using this software with the DeepSeek API is a separate matter: API access, pricing, privacy, end-user obligations, and use of DeepSeek trademarks are governed by the DeepSeek Open Platform Terms of Service (English, Chinese). Do not commit or redistribute API keys, and do not imply endorsement by DeepSeek.