{"data":{"slug":"deepseek-harness","name":"DeepSeek Harness","tagline":"MIT everything-is-a-plugin agent harness (dsh) — Cordis, Web UI","category":"agents","categoryName":"AI Agents","url":"https://deepseek-harness.github.io/deepseek-harness/","github":"https://github.com/deepseek-ai/deepseek-harness","pricing":"open-source","hook":"DeepSeek Harness (`dsh`) is DeepSeek’s open agent harness: an everything-is-a-plugin architecture on Cordis, with a local Web UI via `npx @deepseek-ai/dsh web`.","whatsGood":"MIT (deepseek-ai/deepseek-harness). Plugin topic `dsh-plugin`, AGENTS.md for agent contributors, docs at deepseek-harness.github.io, Discord + Discussions. Run path is npm (`npx @deepseek-ai/dsh web` → localhost:3080) or pnpm from source. Not the similarly named Harness SDK: this is DeepSeek’s plugin harness product.","theCatch":"Vs DeerFlow and OpenHands: this is a Cordis plugin-harness + Web UI from DeepSeek, not a ByteDance SuperAgent product tree or an open coding agent alone. Developer preview with explicit COMPATIBILITY-BREAKING CHANGES; SAFETY.md says no security audit, model/plugin code can damage the host — prefer a disposable VM/container. Extreme star velocity (~235k aria-label) is discovery noise, not proof.","verdict":"MIT plugin agent harness when you want Cordis-shaped extensibility and will treat preview APIs plus SAFETY.md as real constraints.","addedAt":"2026-09-24","featured":false,"domain":"AI Agents","subSpecialty":"Agents","subcategory":"Orchestration","tags":["web-ui","self-host","permissive","active","young-repo","fast-stars"],"capabilities":[],"surfaces":["Self-host"],"ecosystem":["Multi-platform"],"licenseModel":"OSS/MIT","githubStars":253471,"starsPerWeek":26253,"access":"free","archived":false,"repo":{"createdAt":"2026-08-13","pushedAt":"2026-10-17","license":"MIT","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"claude-code","name":"Claude Code","tagline":"Terminal-first coding agent with deep repository context"},{"slug":"cursor","name":"Cursor","tagline":"The AI-first code editor that understands your codebase"},{"slug":"devin","name":"Devin","tagline":"Autonomous AI engineer for defined engineering tasks"},{"slug":"stagehand","name":"Stagehand","tagline":"AI-native browser automation that mixes code and natural language"},{"slug":"browser-use","name":"Browser Use","tagline":"Open-source framework for LLM-driven browser agents"}],"links":{"self":"/api/gems/deepseek-harness","html":"/gems/deepseek-harness","markdown":"/gems/deepseek-harness.md","category":"/api/gems?category=agents","categoryPage":"/stacks/agents"}}