_Kerman a6c7c70d4f fix(session-projection): close review findings from the fold migration
- permission-presets: register the permissions unit synchronously before the
  existing-session sweep, so a remount reads folded knob state instead of
  treating every session as fresh; add a regression test for that path
- sandbox-policy/terminal-bash: mount the projection registry in the 5 pwsh
  terminal tests, the sdk-minimal bundle, and the e2b fixture composition;
  declare the new package dependency in both manifests
- plan-mode: restore .strict() on the plan unit state schema and drop the
  deleted foldPlanMode from the bilingual READMEs
- session-title/session-projection: sync bilingual READMEs to the mandatory
  projection seam and re-record translation pairing
- docs: turnBoundary reader contract, subagent schema comment, token-meter
  import comment, sandbox-policy module docstring
2026-08-26 14:13:42 +08:00
2026-08-13 13:07:24 +08:00

DeepSeek Harness

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

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

Documentation: https://deepseek-harness.github.io/deepseek-harness/

Developer preview

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

Review the safety notice before running the project.

Run

Run from npm

Install Node.js, then run:

npx @deepseek-ai/dsh web

The command starts the Web UI at http://127.0.0.1:3080 by default and opens it in the default browser for a local launch. An SSH launch only prints the host URL because the SSH client or editor owns the local forwarded address. Pass --no-open to run the server without opening a browser. 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

pnpm run build prepares the repository artifacts. pnpm dsh web uses those built artifacts without rebuilding.

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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