DeepSeek has rolled out a v0.2 preview of Harness, its open-source AI agent framework, alongside an official desktop application. The release is aimed at everyday work and programming use cases, bundling commonly used office and developer tools into a single package. According to the update, the framework includes plugin management, file and code diff previews, document processing, and automated task scheduling. The desktop app supports macOS on Apple silicon and 64-bit Windows, and users do not need to install Node.js or pnpm separately to run it.
Harness is released under the MIT license and runs on the Cordis architecture. DeepSeek said every major layer in the stack, including model adapters, the tool registry, and the agent loop, is designed as a replaceable plugin. The framework supports not only DeepSeek models but also third-party OpenAI-compatible endpoints, and the company also uses Harness as its internal evaluation platform. In the v0.2.1-alpha.1 build, DeepSeek added an experimental Claude Code Mods compatibility layer and removed runtime immutable plugins, a change that could break some extensions. DeepSeek also warned that future versions will continue to bring compatibility changes.
DeepSeek has released a v0.2 preview of Harness, its open-source AI agent framework, and introduced an official desktop application.
The new version is aimed at daily work and programming tasks. It comes with commonly used office and development tools, along with plugin management, file and code diff previews, document processing, and automated task scheduling. The desktop app supports macOS on Apple silicon and 64-bit Windows, and users can run it without installing Node.js or pnpm separately.
Framework built around replaceable plugins
Harness is distributed under the MIT license and runs on the Cordis architecture. DeepSeek said every layer, including model adapters, the tool registry, and the agent loop, is designed as a replaceable plugin. The framework supports DeepSeek models as well as third-party OpenAI-compatible endpoints. DeepSeek also uses Harness as its internal evaluation platform.
v0.2.1-alpha.1 adds experimental compatibility layer
The v0.2.1-alpha.1 build adds an experimental Claude Code Mods compatibility layer and removes runtime immutable plugins. DeepSeek said the change may introduce breaking changes for some extensions, and warned that future versions will continue to include compatibility changes.
The update was cited by MarkTechPost and republished in a Techub brief.
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