Two further review findings on the CPython backend: - The grace-window SIGKILL timer was left armed after settlement, so on a normal completion a kill(-pid) could fire up to graceMs later and strike a recycled pgid once the kernel reused the leader's pid. settle() now clears the timer the moment the process group is confirmed empty (the normal path and when the poll sees the survivor gone), bounding the reuse window to the genuine-survivor case where the group cannot be empty to reuse. - _clamped bounded rlimits by the inherited hard limit only, silently raising an inherited soft limit stricter than the request (loosening RLIMIT_AS or deferring RLIMIT_CPU SIGXCPU). It now clamps each side against its own inherited counterpart and pins soft under hard, keeping the strictest of configured and inherited. Adds an inherited-soft-limit regression test. Agent Note expanded to seven fixes with the two new rejected alternatives; zh pair re-recorded.
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.