# DeepSeek Harness Developer Preview Open for Testing

- Category: Flash (快讯)
- Published: 2026-08-13T11:58:00.000Z
- Source date: 2026-08-13
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The DeepSeek Harness Developer Preview (v0.1) is now open for global testing and released as open source under the MIT license. Built on a 'everything is a plugin' architecture, it allows flexible combination of models, tools, and skills, offering four operation modes and full tool invocation capabilities.

## At a glance

- DeepSeek Harness v0.1 preview is open for testing and open-sourced under MIT license
- Uses a plugin-based architecture supporting four operation modes and flexible agent capability combinations

## The update

The DeepSeek Harness team has announced that the Developer Preview (v0.1) is officially open for testing by Harness developers worldwide, simultaneously releasing it as open source under the MIT license. The product features a core 'everything is a plugin' architecture built on the Cordis plugin system, allowing for the free replacement and combination of agent capabilities such as models, tools, and skills. In terms of functionality, DeepSeek Harness offers four distinct operation modes: Standard, PTC, Minimalist, and Creative, catering to diverse development needs. Additionally, the platform supports full tool invocation and allows for custom presets, providing developers with a highly flexible and customizable environment for building AI applications.

## Sources

- [DeepSeek Harness 团队](https://mp.weixin.qq.com/s/mANdGRI4fO_sEbC1ECEoZQ) (2026-08-13)

This article is an AI-assisted synthesis by 88Z AI based on the public sources below. Product claims and availability are attributed to their publishers. It does not represent independent testing or first-hand reporting.