DSH primer
What is DeepSeek Agent Harness?
DeepSeek Harness, commonly shortened to DSH, is DeepSeek AI's open-source agent harness. Its defining design idea is that every capability is delivered as a plugin.
A plugin-first agent harness
The official project describes DSH as an open-source agent harness powered by Cordis. In practical terms, the agent environment can be extended through interfaces, tools, skills, sessions, storage, and workflows instead of acting as a fixed application.
Developer preview means evaluate carefully
DeepSeek marks DSH as a developer preview and warns that compatibility-breaking changes will occur. Inspect the source, check the supported DSH version, review filesystem, network, and secret permissions, then test in a disposable workspace before relying on a plugin.
Where the plugin ecosystem lives
The official repository tells authors to use the dsh-plugin GitHub topic for discovery. That topic is useful, but it is a discovery signal rather than a certification mark. DSH Index keeps that distinction visible on every listing.
Editorial note: DSH Index is independent and not affiliated with DeepSeek AI. Last source review: August 15, 2026.