Arrow navigation was bound to `autoFocus`, so the dropdowns that open with the keyboard on their trigger — the composer's permission seat, the settings pickers, the workspace and preset chips — had no walk at all, and a walk that read its position from `document.activeElement` alternated between the first and last row as soon as a row refused focus. The walk now works either way and resumes from the index it last focused. The keyboard returns to the anchor on Escape and on a selection — unless the owner moved it itself, as a presented file card does for its preview button — and the focused row wears the hover fill instead of the browser's ring. An open menu takes the first Escape from the dialog it sits in. The composer's trigger menu keeps its own Tab, which settles or drills the highlighted candidate; Escape and Shift+Tab leave it without settling, and a dismissed menu stays dismissed until its query changes. Opening it from the launcher button returns the keyboard to the editor first, since the menu is a combobox over that editor.
DeepSeek Harness
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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.
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.