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Aug 13, 2026

DeepSeek Harness Now Available for Developer Preview with Source Code Access

Aug 13, 2026
AI Summary

DeepSeek Harness has launched a developer preview, allowing developers to access its source code and build agent harnesses. The system is designed to be modular, enabling the swapping and recomposition of various capabilities through plugins.

  • DeepSeek Harness is now in developer preview for agent harness developers globally, with source code available.
  • The system uses a plugin architecture where capabilities such as models, tools, skills, and UI can be swapped or recomposed.
  • Developers can configure capabilities without altering the source code, utilizing a plugin system managed by the Cordis kernel.
  • An append-only session log records everything the model encounters, allowing for detailed inspection and replay of events.
  • Multiple operational modes are available: Standard, Code, Minimal, and Creator, each offering different tools and functionalities.
  • Developers are encouraged to clone the repository and follow setup instructions to explore the platform further.
  • DeepSeek Harness is still in the testing phase, with ongoing development of its core plugins and APIs.
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