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master now ships the reminder stack as the optional `@deepseek-ai/dsh-experimental-schedule-bundle`; this branch keeps the preset-level ownership beside it. Resolutions: - The Host rows keep master's `disabled: true`. The optional bundle switches `schedule` and `ui-schedule` on and no longer `time-context`: the clock row is preset-level, so flipping the Host row as well would mount the plugin in two scopes and write two readings per step. - `standard`, `cordis`, and `ptc` declare `preset-time-context` and `tool-schedule`; `minimal` declares neither. - `tool-schedule` injects `tools` and resolves `schedule` per scope through `ctx.inject`, so the row stays valid but produces no tools while the service is off, and produces them once the bundle mounts it. - The assembled-Web Schedule spec keeps master's bundle overlay and restates the shipped `preset-standard` row instead of the deleted fixture, because a top-level patch cannot reach a plugin a preset declares. - Documentation and Agent Notes describe both layers; the note master archived stays frozen with its manifest hashes.
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.
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.