Tianyi Cui
691861091f
Regenerate current Python Session expectations through the real macOS arm64 SEA executable built from fdd44667b4b496093e765af57d3751dfb917d834. The native writer emits session/title after request/header and request/context. Update only five current V3 logs; result.json, minimal/model-visible.json, and minimal-in-history/prompt-history.json regenerate identically. All five V2 predecessors remain byte-identical to b2b300f9. Build evidence: LEFTHOOK=0 pnpm install --frozen-lockfile --offline; pnpm exec tsx scripts/build-exe-for-python-sdk.ts --targets node24-macos-arm64 (full build, no skip-build): passed. file dist-exe/deepseek-harness-sdk-runtime-macos-arm64: Mach-O 64-bit executable arm64. Smoke evidence: export PYTHONDONTWRITEBYTECODE=1 PYTHONPATH=python/sdk/src:python/sdk-runtime/src; PY=/Users/cty/dsh-deploy/.agents/worktrees/sp-kv-sdk-evidence/tmp/py-sdk-venv/bin/python. For each scenario in sdk-snapshot sdk-restart sdk-minimal sdk-minimal-in-history, ran "$PY" scripts/smoke-python-runtime.py --exe dist-exe/deepseek-harness-sdk-runtime-macos-arm64 --scenario "$scenario" --update-snapshots, then the same command without --update-snapshots: all eight passed. Helpers: PYTHONDONTWRITEBYTECODE=1 PYTHONPATH=python/sdk/src:python/sdk-runtime/src uv run --offline --no-project --python /Users/cty/.local/share/uv/python/cpython-3.14.5-macos-aarch64-none/bin/python3 --with pytest --with "pydantic>=2.12,<3" python -m pytest python/sdk/tests/test_smoke_model.py -q: 28 passed. git diff --quiet b2b300f9 -- "scripts/snapshots/python-sdk-single-exe/**/*.v2.jsonl" and git diff --cached --check passed. No source, migration, test, or launcher changes.
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.