What is DeepSeek Harness?
DeepSeek Harness (dsh) is the official open-source autonomous agent runtime developed by DeepSeek AI (deepseek-ai/deepseek-harness), amassing over 250,000 GitHub stars. Built on an "everything-is-a-plugin" spatiotemporal composability architecture (powered by Cordis), DeepSeek Harness transforms frontier LLMs from passive text predictors into self-directed agents capable of executing multi-hour software engineering, web automation, and system administration workflows.
Unlike monolithic agent frameworks, DeepSeek Harness separates core scheduling from tools, skills, and user interfaces. Everything — from shell execution, terminal multiplexing, and web browsers to git automation and custom domain skills — is dynamically loaded as modular plugins.
Key Capabilities & Architecture
- Everything is a Plugin — Easily compose, fork, and hot-reload agent capabilities. Create new plugins on the fly using the built-in natural language "Creator Mode".
- Turnkey Dual Interfaces — Run as a native cross-platform desktop application or launch the lightweight web UI with a single command (
npx @deepseek-ai/dsh web). - Multi-Model Support — Native integration with DeepSeek-V3, DeepSeek-Coder, Claude, GPT, and local Ollama models.
- Full Execution Trace & Sandboxing — Inspect agent thoughts, planned tool calls, and step rollbacks in real time with fine-grained security permission tiers.
- Complementary Ecosystem — Pairs directly with Reverse Engineer Anything (REA) and Claude Code.
Quickstart & Official Installation
Launch DeepSeek Harness instantly via npx:
# 1. Start the interactive Web UI
npx @deepseek-ai/dsh web
# 2. Or build locally from source
git clone https://github.com/deepseek-ai/deepseek-harness.git
cd deepseek-harness
pnpm install
pnpm run build
pnpm dsh web- Official Webpage: deepseek.com/en/harness
- GitHub Repository: github.com/deepseek-ai/deepseek-harness
- Documentation: deepseek-harness.github.io
