* feat(subagent): share identity and collaboration guidance * fix(subagent): complete shared guidance snapshot expectations * fix(subagent): match task descriptions to the user language * refactor(subagent): retain shared guidance with Session ids * test(subagent): recognize parent ids in shared identity * Checkpoint ID collaboration guidance generated expectations * Preserve historical Web schema sidecars * fix(test-support): preserve job references during snapshot refresh * test(subagent): refresh ID-only collaboration guidance outputs * fix(subagent): rely on list_agents tool description * fix(subagent): keep collaboration guidance consistent with live identity * test(team): parse parent identity from shared guidance * test(subagent): address parent from shared identity context * test(subagent): refresh compiled Web guidance snapshots * test(subagent): refresh browser collaboration context fixtures * docs(subagent): attribute required identity to standard controls * fix(subagent): clarify collaboration identity prompts * test(subagent): remove duplicate PowerShell collaboration context * refactor(subagent): match unavailable-root errors by name and code --------- Co-authored-by: imccyu <[email protected]>
DeepSeek Harness
English | 中文
DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI.
It is built on an everything-is-a-plugin architecture and powered by Cordis, whose design is described in A Programming Paradigm for Spatiotemporal Composability.
Documentation: https://deepseek-harness.github.io/deepseek-harness/
Developer preview
DeepSeek Harness is in developer preview and iterating rapidly. THERE WILL BE COMPATIBILITY-BREAKING CHANGES.
Review the safety notice before running the project.
Run
Run from npm
Install Node.js, then run:
npx @deepseek-ai/dsh web
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:
git clone https://github.com/deepseek-ai/deepseek-harness.git
cd deepseek-harness
pnpm install
pnpm run build
pnpm dsh web
pnpm run build prepares the repository artifacts. pnpm dsh web uses those built artifacts without rebuilding.
Community and support
- Submit feedback or bug reports through GitHub Discussions.
- Add the
dsh-plugintopic to your plugin repository for discoverability. - Join DeepSeek Harness Discord community.
Contributing
See CONTRIBUTING.md.
Development
Start with the development guide and architecture documentation.
pnpm run dev:web builds, serves, and rebuilds client bundles on source edits in one terminal, and make help lists the matching Make targets for Web and Desktop; the guide's application commands section owns the full table.
For agents, follow AGENTS.md.
Citation
@misc{deepseek-harness2026,
title={DeepSeek Harness: Everything is a Plugin},
author={DeepSeek-AI},
year={2026},
publisher={GitHub},
howpublished={\url{https://github.com/deepseek-ai/deepseek-harness}},
}
License
Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.