DeepSeek Harness
DeepSeek released DeepSeek Harness, an open-source agent framework now in worldwide public preview.
DeepSeek Harness is an open-source agent harness now in public preview worldwide. It is built on Cordis’s plugin architecture so users can extend tools, skills, and the interface, including Creator mode and scheduled tasks. The app supports document and data work, coding, cited research, and background scripts, and runs as a desktop app or a web UI started with npx @deepseek-ai/dsh. The preview references the DeepSeek-V41-Flash model, and source is on GitHub at deepseek-ai/deepseek-harness.
- DeepSeek Harness is open source and in worldwide public preview.
- Cordis plugin architecture extends tools, skills, and the interface.
- It covers coding, research, documents, data, and scheduled tasks.
- The web UI launches with npx @deepseek-ai/dsh after installing Node.js.
- The preview interface lists the DeepSeek-V41-Flash model.
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Preview
DeepSeek Harness
Ready to use. Right now.
Everyday tasks, coding, or your own harness—it starts here.
DeepSeek Harness is now in public preview worldwide and open source, with composable plugins that extend what agents can do.
Meet DeepSeek Harness
Could you introduce yourself?
Thought for a while
I'm DeepSeek Harness, an open-source harness from DeepSeek built on Cordis's “everything is a plugin” architecture. Run me as a desktop app or launch the web UI from code.
I can help with:
- Everyday work — Organize files, analyze data, draft docs, and create slides.Everyday work — Work with docs, data, and slides.
- Coding — Explore repos, fix bugs, build features, and run tests.Coding — Fix bugs, build features, run tests.
- Research — Find information, verify facts, and cite sources.Research — Find facts and cite sources.
- Background tasks — Run scripts, batch-process files, and track progress.Background tasks — Run scripts and track progress.
- Plugins — Add or build plugins to fit your workflow.Plugins — Add plugins or build your own.
And so much more...
Describe what you want to build, / commands, @ files or sessions
Workspace Write
DeepSeek-V41-Flash High
Expanding capabilities.
Work on your terms.
Everything is a plugin
Install plugins, or create them through chat in “Creator mode”, to extend tools, skills, and the interface.
Complete a range of tasks
Organize documents, analyze spreadsheets, and write code. Preview the results directly and refine them through conversation.
Adapt to your workflow
Enable the Scheduled tasks plugin to start tasks anytime and run recurring work on schedule. Stay on top of progress and inspect tool call details when needed.
Developer tools
Inspect execution traces and detailed runtime information to troubleshoot issues with tool calls and task execution.
Developer experience
Start with one command
Install Node.js, then launch the Web UI with npx.
$ npx @deepseek-ai/dsh web
Install from source
Clone the full source and follow the setup instructions in the repository.
$ git clone https://github.com/deepseek-ai/deepseek-harness