--- title: DeepSeek Harness Setup: A Free Claude Code You Own In 10... description: DeepSeek released an open-source coding agent harness called Deep Seek Harness (built on a framework called Cordis) that quickly gained 190,000 GitHub stars.... canonical: https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: DeepSeek Harness Setup: A Free Claude Code You Own In 10 Minutes | daily.dev og:description: DeepSeek released an open-source coding agent harness called Deep Seek Harness (built on a framework called Cordis) that quickly gained 190,000 GitHub stars.... og:url: https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq og:image: https://api.daily.dev/og/posts/W7KM80xhq.png og:image:alt: DeepSeek Harness Setup: A Free Claude Code You Own In 10 Minutes og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # DeepSeek Harness Setup: A Free Claude Code You Own In 10 Minutes **[YouTube](https://daily.dev/sources/youtube)** · 13 min read · 0 upvotes · 0 comments ## Summary DeepSeek released an open-source coding agent harness called Deep Seek Harness (built on a framework called Cordis) that quickly gained 190,000 GitHub stars. Unlike Claude Code, which bundles a fixed set of decisions into a closed product, this harness treats every component - models, tools, plugins, permissions, memory - as swappable plugins. Users can plug in any model (DeepSeek's own API, GLM, Gemini, local Ollama models, or even Anthropic/OpenAI keys), watch fully traceable run logs including system prompts and tool calls, resume killed tasks from exact context, and build custom plugins like Discord run notifications. It also ships sub-agent packages that can spawn actual Claude Code or Codex processes as callable tools. The project is a developer preview/release candidate with warned breaking changes, separating the 'harness' (free) from the 'model' (the only thing you still pay for). ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is DeepSeek Harness and how is it different from Claude Code? DeepSeek Harness is an open-source, fully customizable coding agent framework where every component - models, tools, plugins, permissions, and memory - is an editable plugin, unlike Claude Code where those decisions are made and closed by Anthropic. It reached 190,000 GitHub stars shortly after release, is built on a framework called Cordis, and lets you plug in any model, including DeepSeek, GLM, Gemini, local Ollama models, or even Anthropic and OpenAI keys. _Developers weighing agent harnesses against model choice can track releases like this one on daily.dev._ ### Can DeepSeek Harness run Claude Code or Codex as sub-agents? Yes, two packages inside the repo, sub-agent-claude-code and sub-agent-codex, spawn actual Claude Code and Codex child processes and hand them a task. These calls are one-shot only, with no follow-up or resumable conversation, the tools load dormant by default, and credentials are stripped from the environment so API keys must be passed in explicitly. _Anyone combining multiple coding agents can follow tooling like this to plan agent orchestration on daily.dev._ ### Is DeepSeek Harness stable enough for production use? No, it is currently a developer preview with the only tagged release being a release candidate, and the readme explicitly warns of breaking changes. However, every run and component state is fully traceable and undoable, so killed or interrupted tasks can resume from the exact same context, tool calls, and system prompt that were in progress. _Teams evaluating early-stage AI dev tools can watch for stability updates on daily.dev before committing._ --- Tags: [#open-source](https://daily.dev/tags/open-source), [#ai-agents](https://daily.dev/tags/ai-agents), [#mcp](https://daily.dev/tags/mcp), [#claude-code](https://daily.dev/tags/claude-code), [#deepseek](https://daily.dev/tags/deepseek) [View this post on daily.dev](https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"DeepSeek Harness Setup: A Free Claude Code You Own In 10 Minutes","url":"https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq"},"datePublished":"2026-09-01T16:16:34.029Z","dateModified":"2026-09-01T16:17:34.724Z","description":"DeepSeek released an open-source coding agent harness called Deep Seek Harness (built on a framework called Cordis) that quickly gained 190,000 GitHub stars....","image":"https://i.ytimg.com/vi/EDxVn1q8udE/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/EDxVn1q8udE/sddefault.jpg","isAccessibleForFree":true,"articleSection":"YouTube","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"YouTube","logo":"https://media.daily.dev/image/upload/s--W5zMumpP--/f_auto/v1725350181/logos/youtube","url":"https://daily.dev/sources/youtube"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"open-source,ai-agents,mcp,claude-code,deepseek","timeRequired":"PT13M","video":{"@type":"VideoObject","name":"DeepSeek Harness Setup: A Free Claude Code You Own In 10 Minutes","description":"DeepSeek released an open-source coding agent harness called Deep Seek Harness (built on a framework called Cordis) that quickly gained 190,000 GitHub stars....","thumbnailUrl":"https://i.ytimg.com/vi/EDxVn1q8udE/sddefault.jpg","uploadDate":"2026-09-01T16:16:34.029Z","duration":"PT13M","url":"https://api.daily.dev/r/W7KM80xhq","embedUrl":"https://www.youtube.com/embed/EDxVn1q8udE"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"YouTube","item":"https://daily.dev/sources/youtube"},{"@type":"ListItem","position":3,"name":"DeepSeek Harness Setup: A Free Claude Code You Own In 10 Minutes"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/deepseek-harness-setup-a-free-claude-code-you-own-in-10-minutes-w7km80xhq#faq","mainEntity":[{"@type":"Question","name":"What is DeepSeek Harness and how is it different from Claude Code?","acceptedAnswer":{"@type":"Answer","text":"DeepSeek Harness is an open-source, fully customizable coding agent framework where every component - models, tools, plugins, permissions, and memory - is an editable plugin, unlike Claude Code where those decisions are made and closed by Anthropic. 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