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, this means the agent environment can be extended through capabilities such as interfaces, tools, skills, sessions, storage, and workflows instead of treating the harness as a fixed application.

Developer preview means evaluate carefully

DeepSeek marks DSH as a developer preview and warns that compatibility-breaking changes will occur. For a plugin user, the sensible workflow is to inspect the source, check the supported DSH version, review filesystem/network/secret permissions, and test in a disposable workspace before relying on it.

Where does the plugin ecosystem live?

The official repository tells authors to use the dsh-plugin GitHub topic for discovery. That topic is valuable, but it is a discovery signal, not a certification mark. DSH Index keeps that distinction explicit.

Browse source-linked DSH plugins →Read the official DSH repository ↗

Editorial note: DSH Index is independent and not affiliated with DeepSeek AI. Last source review: August 15, 2026.