# DeepSeek releases Harness v0.1 in Developer Preview

DeepSeek Harness v0.1 is now available as an open-source agent harness under the MIT license, built on the Cordis meta-framework.

- The codebase is open-sourced under the MIT license.
- It is powered by the Cordis meta-framework.
- All components—models, tools, skills, sessions, sandboxes, filesystems, loops, orchestration, and UI—are implemented as plugins.
- The project is available on GitHub at github.com/deepseek-ai/deepseek-harness.

## Why it matters

Developers building agent harnesses can now use and extend DeepSeek's plugin-based architecture, which allows mixing, matching, and replacing components.

## Sources

- [DeepSeek: DeepSeek releases Harness v0.1 in Developer Preview](https://x.com/deepseek_ai/status/2087887408440164663)

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Summarized by dstilled on 2026-08-13. https://dstilled.ai/story/13c75402-05d1-4e5e-8f1b-21988484b184