Unofficial · MIT product · developer preview
Run DeepSeek Harness today.
Unofficial field guide for the open-source agent harness DeepSeek shipped on 13 Aug 2026. Copy the command, pick a mode, then browse plugins. Source of truth stays on the official GitHub.
$ npx @deepseek-ai/dsh webNeeds Node.js. Opens the Web UI at http://127.0.0.1:3080
Four runtime modes
Official DSH ships four presets. Same kernel, different plugins.
Standard
Full coding agent: files, shell, search, skills, planning, goals, subagents, workflows.
Code
Standard plus the Code Mode SDK. The model writes TypeScript to chain multi-step tool calls.
Minimal
Only bash and str_replace_editor. The thin harness DeepSeek used for public Code Agent benches.
Creator
Inspect the live runtime, try Cordis plugins in memory, author new presets. Dynamic plugins die on restart.
Everything is a plugin
Models, tools, skills, sessions, sandboxes, storage, loops, scheduling, and the UI are all Cordis plugins.
Every run is traceable
Append-only session log. Resume, fork, search, and replay share one event stream.
Questions people actually have
Straight answers. Official docs win if anything here drifts.
Guides
Install notes, mode breakdowns, and honest comparisons.
Install DeepSeek Harness in one command
npx @deepseek-ai/dsh web starts the official Web UI on localhost:3080. Unofficial walkthrough.
DSH Field KitStandard, Code, Minimal, Creator
The four official DeepSeek Harness modes, restated without the marketing layer.
DSH Field KitDeepSeek Harness vs Claude Code
DSH is a plugin kernel in preview. Claude Code is a finished agent. Pick by job, not by hype.
DSH Field KitRead the official source, then start local.
This site maps the product. The code, license, and breaking changes live on DeepSeek's GitHub.