Yichen Jiang
1922f322aa
Review found two faults in the endpoint and configuration checks. The providers took the official chat route's endpoint from the first active dsh-llm-deepseek-api-key Loader row, so a composition that isolates several instances answered for an unrelated one: a correct route lost search, or a gateway's key reached DeepSeek. And a key saved on the Web search settings page lands under the default DEEPSEEK_API_KEY reference, so the inference that search had its own configuration never saw it. Both DeepSeek web packages now serve only the deepseek-account and deepseek-official routes, whatever key they are configured with, and no longer compare the chat endpoint with their own. ready() checks the route and then credential presence as before; the API-key resolver repeats the route check and refuses with WEB_PROVIDER_ROUTE_DISABLED. The packages no longer read Loader rows or depend on dsh-llm-deepseek-api-key, so the lockfile, the module graph, and the keyless smoke expectations that the endpoint check had changed return to master's. An upgrade guide covers conversations on other providers' models, which lose DeepSeek web search and, with the Search and Fetch APIs selected, web_fetch.
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.