DeepSeek Harness
Everything is a plugin · Cordis kernel
Agent = Model + Harness. This is DeepSeek’s own shell, not a random pip adapter. Standard / Code / Minimal / Creator modes. Append-only trajectory logs.
Highlights
@deepseek-ai/dsh web
Serves Web UI at 127.0.0.1:3080. Or clone + pnpm.
Plugin kernel
github.com/cordiverse/cordis — mount, deps, events.
Official bench mode
bash + str_replace_editor only. That’s the 0731/0813 footnote.
Preview warning
README: THERE WILL BE COMPATIBILITY-BREAKING CHANGES.
What dsh is
May hiring said Model + Harness = Agent and named Claude Code / Cursor / Codex as the layer to fill. August’s developer preview is that line shipping.
Why it is trending
Do note the distinction from the third-party "deepseek-harness" protocol wrappers on PyPI: the official project lives under the deepseek-ai GitHub organisation in a repository named deepseek-harness. Community plugins are usually tagged with the dsh-plugin topic.
Timeline
Public Code Harness hiring.
Flash 0731 changelog names upcoming Harness Minimal.
dsh developer preview + Cordis site.
Confirmed vs caution
Confirmed
Official site + GitHub README + four modes + MIT + bench footnote.
Caution
Three expectations to set: dsh is a developer preview and its APIs will change in breaking ways; its feature scope is not equivalent to Claude Code; and while the software is free under MIT, model tokens still cost money.
How to choose
Need official DeepSeek scores
Use Minimal + max + t=1.0 p=0.95 as they documented.
Need a daily coding agent
Standard/Code modes, knowing it’s preview. Or Claude Code / OpenCode.
How to use it
npx @deepseek-ai/dsh web · git clone github.com/deepseek-ai/deepseek-harness
On QCode
dsh runs on your own key. QCode currently lists deepseek-v4-flash and deepseek-v4-pro on /models, and those can be pointed at dsh like any other OpenAI- or Anthropic-compatible endpoint.
FAQ
Official?
Yes, deepseek-ai.
What is Cordis?
The plugin kernel under dsh.
Why Minimal?
To score the model, not the kitchen sink.
Paid?
MIT software. You pay model APIs.
Replace Claude Code?
Same category, preview maturity.
Site harness-engineering-guide?
The on-site /harness-engineering-guide covers the generic concept of a harness — the scheduling, tooling and context layer that sits around a model. This page covers dsh, DeepSeek's own concrete implementation of that idea.
Sources
deepseek.com/harness/en/ ; github.com/deepseek-ai/deepseek-harness ; 0731/0813 changelogs.
Concept page already exists — this is the product
Link /harness-engineering-guide. Put Cordis in an H2 for that exact query.
Related
Not affiliated beyond citing official repos. Preview software.