deepseek-harness

DeepSeek Harness

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

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:

The command starts the Web UI at http://127.0.0.1:3080 by default and opens it in the default browser for a local launch. An SSH launch only prints the host URL because the SSH client or editor owns the local forwarded address. Pass --no-open to run the server without opening a browser. See Web UI guide. Run from source

To run from a repository checkout:

pnpm run build prepares the repository artifacts. pnpm dsh web uses those built artifacts without rebuilding. 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. Contributing

See CONTRIBUTING.md. 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.