DeepSeek Harness Desktop for macOS and Windows
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.
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.
Organize documents, analyze spreadsheets, and write code. Preview the results directly and refine them through conversation.
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.
Inspect execution traces and detailed runtime information to troubleshoot issues with tool calls and task execution.
Install Node.js, then launch the Web UI with npx.
Clone the full source and follow the setup instructions in the repository.
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.