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# Conflicts: # docs/config-catalog.i18n.yaml # docs/config-catalog.md # docs/event-producer-consumer.i18n.yaml # docs/event-producer-consumer.md # docs/event-producer-consumer.zh.md # docs/module-graph.i18n.yaml # docs/module-graph.md # docs/module-graph.zh.md # docs/persistence-catalog.i18n.yaml # docs/persistence-catalog.md # docs/persistence-catalog.zh.md # packages/api/session-controller/src/commands.ts # packages/api/session-controller/src/index.ts # packages/api/session-controller/tests/client-contract.client.spec.ts # packages/api/session-controller/tests/session-pending-submissions.client.spec.ts # packages/client/ui-attachment/src/AttachmentRail.module.css # packages/client/ui-chat/src/client/chat/MessageItem.tsx # packages/client/ui-conversation/src/client/skeleton/InputBar.tsx # packages/client/ui-trajectory/README.i18n.yaml # packages/client/ui-trajectory/README.md # packages/client/ui-trajectory/README.zh.md # packages/extensions/cordis-client-runner/src/client/api-catalog.ts # packages/llm/token-meter/src/surface-fold.ts # packages/session-query/session-log-export/src/archive.ts # packages/session-query/session-log-export/tests/archive.host.spec.ts
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.
License
Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.