Everything is a plugin
Install official plugins or create new ones in Creator mode to extend tools, skills, and the interface.
DeepSeek · Open source · Public preview
DeepSeek Harness
An open-source agent harness where models, tools, skills, sessions, and UI are composable plugins—ready for everyday work, coding, and custom agent runtimes.
Product Introduction
DeepSeek Harness (dsh) is DeepSeek’s open agent runtime: run a desktop app or launch a local Web UI, then extend what the agent can do with plugins.
It is built on Cordis’s “everything is a plugin” architecture. Models, tools, skills, sessions, sandboxes, scheduling, and the UI are all plugins you can install, swap, or recompose—without forking the core.
In public preview you can organize files, analyze data, draft docs, explore repos, run background jobs, and inspect execution traces. Creator mode lets you build and install plugins through chat. The project is MIT-licensed and iterating quickly, so expect breaking changes as the APIs mature.
Key Features
What stands out about DeepSeek Harness as an agent platform.
Work and coding in one place
Organize documents, analyze spreadsheets, write code, and preview results—then refine through conversation.
Scheduled & background work
Enable scheduled tasks for recurring jobs, run scripts in the background, and track progress as they finish.
Inspectable execution
Open developer traces to see tool calls, timing, and session context when debugging agent behavior.
How to Get Started
Three common ways to launch DeepSeek Harness.
- 01
Try the official site
Open DeepSeek’s Harness page for the public preview overview, desktop downloads, and product walkthroughs.
- 02
Launch the Web UI
Install Node.js, then run npx @deepseek-ai/dsh web. The UI defaults to http://127.0.0.1:3080 and can open in your browser.
- 03
Extend with plugins
Add official plugins, or use Creator mode to generate and install plugins that match your workflow.
Use Cases
Typical ways people use DeepSeek Harness today.
Everyday knowledge work
Organize files, analyze data, draft documents, and build slides inside a conversational agent workspace.
Coding agents
Explore repositories, fix bugs, ship features, and run tests with an inspectable tool loop.
Research with citations
Find information, verify facts, and keep sources attached as the agent works through a question.
Custom harness experiments
Swap models, sandboxes, and UI plugins to prototype your own agent runtime on open infrastructure.
Related on MEAGENT
More ways to explore agents, protocols, and coding with AI.
Run from GitHub
npx or a git clone: the commands from the official DeepSeek Harness README.
Open the run guide →Agent Hub
Run live agent tasks on MEAGENT with DeepSeek-backed models.
Open Agent Hub →Coding AI
Task-first paths for building and shipping with AI coding tools.
View Coding AI →Model Context Protocol
The open standard for connecting AI apps to tools and data.
Learn MCP →Discover AI
Browse agents, models, skills, and tools across the ecosystem.
Explore MEAGENT →Frequently Asked Questions
What is DeepSeek Harness?
DeepSeek Harness (dsh) is an open-source agent harness from DeepSeek AI. It runs as a desktop app or local Web UI and uses a Cordis-based plugin system so models, tools, skills, sessions, sandboxes, scheduling, and UI can be swapped or extended.
Is DeepSeek Harness open source?
Yes. The project is published on GitHub under the MIT License. DeepSeek describes it as a public / developer preview that is still iterating, with compatibility-breaking changes expected.
How do I run DeepSeek Harness locally?
Install Node.js, then launch the Web UI with npx @deepseek-ai/dsh web. You can also clone the repository, install with pnpm, build, and run pnpm dsh web. Desktop builds have been offered for macOS and Windows in recent previews.
What does “everything is a plugin” mean?
In DeepSeek Harness, core agent capabilities—including models, tools, skills, sessions, sandboxes, storage, loops, scheduling, and the UI—are provided by plugins. You can install official plugins, create new ones in Creator mode, or recompose the stack without changing Harness source.
Is MEAGENT affiliated with DeepSeek Harness?
No. MEAGENT is an independent guide and discovery site. This page summarizes DeepSeek’s public Harness documentation so you can understand the product; the runtime itself lives on DeepSeek’s site and GitHub.
Try DeepSeek Harness
Open the official site or GitHub to run the open-source harness. MEAGENT helps you understand the product—the code and downloads live with DeepSeek.
Visit Official WebsiteView on GitHub
Product details on this page summarize DeepSeek’s public Harness site and GitHub repository. Preview status, platforms, and APIs can change—confirm on the official channels before you depend on a release.