DeepSeek Releases Open-Source Agent Harness DSH Built on a Uniform Plugin Model

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DeepSeek AI has released DSH (DeepSeek Harness), an open-source agent harness written in TypeScript and distributed under the MIT license. The tool is built on Cordis, a composition runtime centered on a uniform plugin architecture, meaning all extensions share a single mechanism rather than accumulating separate hooks. Its README prominently warns of forthcoming compatibility-breaking changes, placing the notice ahead of installation instructions. DSH can be launched via a simple npx command, spinning up a Web UI at localhost port 3080, with additional support for SSH remote environments and a no-browser server mode. The README functions largely as a routing table to external documentation, targeting plugin authors and coding agents rather than general end users.

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