Tianyi Cui
a88ef734cc
# Conflicts: # .agents/notes/implemented/architecture/2026-08-31-live-assistant-stream-frames.i18n.yaml # .agents/notes/implemented/architecture/2026-08-31-live-assistant-stream-frames.md # .agents/notes/implemented/architecture/2026-08-31-live-assistant-stream-frames.zh.md # .agents/notes/implemented/simplification/2026-08-06-buffer-free-feedback-telemetry.i18n.yaml # .agents/notes/implemented/simplification/2026-08-06-buffer-free-feedback-telemetry.md # .agents/notes/implemented/simplification/2026-08-06-buffer-free-feedback-telemetry.zh.md # apps/web/tests/scaffold.ts # docs/config-catalog.i18n.yaml # docs/config-catalog.md # docs/config-catalog.zh.md # packages/api/session-controller/README.i18n.yaml # packages/api/session-controller/README.md # packages/api/session-controller/README.zh.md # packages/api/session-controller/src/client/sessions/assistant-stream.ts # packages/core/agent-loop/src/agent.ts # packages/core/agent-loop/src/assistant-stream.ts # packages/core/agent-loop/tests/loop.spec.ts # packages/core/agent/src/runtime-types.ts # packages/session/session-telemetry/tests/telemetry.spec.ts # packages/test-support/llm-replay/README.i18n.yaml # packages/test-support/llm-replay/README.md # packages/test-support/llm-replay/README.zh.md # packages/test-support/llm-replay/src/alpha-refusal-fixtures.ts # packages/test-support/llm-replay/src/index.ts # packages/test-support/llm-replay/tests/llm-replay.spec.ts # packages/test-support/session-snapshot/README.i18n.yaml # packages/test-support/session-snapshot/README.md # packages/test-support/session-snapshot/README.zh.md # packages/test-support/session-snapshot/src/suite.ts # packages/test-support/session-snapshot/tests/suite.spec.ts # snapshots/sdk/sdk.snapshot.ts # snapshots/session/headless.snapshot.ts
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
- Submit feedback or bug reports through GitHub Discussions.
- Add the
dsh-plugintopic to your plugin repository for discoverability. - Join DeepSeek Harness Discord community.
Contributing
See CONTRIBUTING.md.
Development
Start with the development guide and architecture documentation.
For agents, follow AGENTS.md.
License
Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.