Spec files that create /tmp/dsh-* directories via mkdtemp now track and delete them in afterEach/afterAll; module-scope fixture dirs (executor spill dirs) are removed in afterAll. The file list came from the observed-residue inventory on the self-hosted CI host: only specs whose dirs actually accumulated were leak sources (issue #3134), superseding the kept-but-unmerged CI sweep branch per the #3233 review decision. Product per-process spill roots (dsh-subprocess-local spawn, dsh-spill-local store) register a process-exit handler that removes the memoized dir, so processes that used the spawn/spill path clean up on normal exit. A SIGKILLed process cannot run in-process teardown; the machine-side timer remains the backstop for that path. Agent Note: .agents/notes/implemented/process/2026-08-28-test-temp-dir-self-cleanup.md
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.