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* feat(preset): declare Agent compositions in profile YAML * fix(preset): share scope binding cleanup and refresh module graph * fix(preset): use host syntax colors in the YAML editor * fix(preset): write new profile declarations as block YAML * fix(preset): align eager activation with browser and worker surfaces * fix(ui-agent-preset): retain the existing preset card layout * fix(preset): keep rows waiting for a Host service mounted and re-audit after settlement A preset row whose Host provider was still activating at declaration time was reported as waiting for a missing service, and the registry recorded the definition as broken for the rest of the process. Split the mount audit into failed and pending rows: failures and root-realm leaks still reject the mount, while pending rows stay mounted and every read and binding re-audits them after the Host Loader tree settles. Remove the accidental self-dependency of @deepseek-ai/dsh-web-app and its lockfile self-link. Archive the copy-only preset authoring note, which the declarative-preset note fully supersedes, and update the ralph note's restore recipe to the profile-patch mechanism. * chore(lint): re-key and prune the unknown-cast baseline after the master merge * refactor(web-app): ship each Agent preset as its own bundle patch file `dsh.bundle.patch` accepts an ordered file list, so the four shipped preset declarations move out of the 1000-line web patch into `presets/<id>.patch.yml`, one insert per file, applied after the host patch. The host patch keeps the preset registry row. Gates and test scaffolds that read the web layer resolve every patch file through `bundlePatchPaths` instead of one hardcoded path. * refactor(preset): drop the save notice injected into live Agents The notice duplicated the save result the Web editor already shows, and after the producer-owned message sources it would have needed its own persisted source kind. Saving now only persists and reports the activation diagnostic; the persistence catalog is unchanged from master. * docs: regenerate the module graph after dropping the registry's llm dependency * test(ui-agent-preset): cover the guide dialog's keyboard handling on the declarative section * fix(preset): address the remaining review comments Apply the lowercase id rule only when creating a declaration, so presets declared with other ids stay editable. Export `isBuiltInPreset` from the display fold and key the client card groups on it. Remove the dead `error` and `retry` locale keys, the JSDoc orphaned by the `trust` removal, the `trust` fields in the plugin-inventory test fixtures, and the stale `dsh-agent-presets` package name in comments and READMEs. * refactor(preset): make the Web preset page view-and-select only Remove the child-plugin YAML editor, the `agent_preset` tool and the registry's read/save Remote methods. Presets are declared and changed only by bundle patches; the settings page keeps the roster, the new-task default and the mode help, and its question icon explains that and offers to start a Creator-mode task. The `editing-cordis-compositions` skill and the Creator persona describe the bundle-based path, and the authored skill-load Session and Web snapshots are refreshed for it. * docs(skill): make the composition skill self-sufficient for preset authoring State where the shipped declarations live, list every declaration field, inline a complete minimal bundle and an override example, and name the verification calls, so Creator mode no longer reads DSH package sources to infer the format. Refresh the authored skill-load Session for the new text. * test(tools): drop the removed agent_preset tool from the catalog expectation
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.