_Kerman 5ddbc6e71f refactor(session-projection): checkpoint every projection unit (migration side)
Adapts this branch to the base's removal of the persist opt-in: the
registry folds and checkpoints every registered unit, the host-only
subagent identity drops its explicit persist: true, and the
state-and-client-views note records the uniform rule. The cordis API
catalog and session-projection subsystem signatures are regenerated.
2026-08-19 16:59:00 +08:00
2026-08-13 15:32:17 +08:00
2026-08-13 13:07:24 +08:00
2026-08-13 18:37:45 +08:00

DeepSeek Harness

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DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI.

It uses an architecture where everything is a plugin, and is powered by Cordis, whose design is described in A Programming Paradigm for Spatiotemporal Composability.

Developer preview

DeepSeek Harness is currently in developer preview and is iterating rapidly. THERE WILL BE COMPATIBILITY-BREAKING CHANGES.

Run

Run from npm

Install Node.js, then run:

npx @deepseek-ai/dsh web

The command starts the Web UI, served at http://127.0.0.1:3080 by default. See Web UI guide.

Run from source

To run from a repository checkout:

git clone https://github.com/deepseek-ai/deepseek-harness.git
cd deepseek-harness
pnpm install
pnpm run build
pnpm dsh web

Community and support

Contributing

See CONTRIBUTING.md.

Development

Start with the development guide and architecture documentation.

For agents, follow AGENTS.md.

License

MIT

Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.

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