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. 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... 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. The floating Pomodoro timer is built, installed, and verified.

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. Created “Weekly project report”, scheduled for Fridays at 17:00 Beijing time. 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. Install from source Clone the full source and follow the setup instructions in the repository. Join the DSH plugin ecosystem DeepSeek Harness is in preview, with evolving core plugins and APIs. We invite users and developers worldwide to explore the limits of intelligence together through open-source, reusable, and composable infrastructure.