Yichen Jiang
596a13d1cb
Two failure classes the repository paid for are not covered by the isolation, synchronization, and teardown rules already in the skill. A value the operating system owns is not guaranteed to return as written. A test may write one back only where the assertion tolerates that write-back failing; where the assertion depends on it, the expected value comes from a fresh read. NTFS truncating a fractional-millisecond mtime and Windows folding environment variable name case are the two instances seen so far. A describe or case timeout overrides the runner's --testTimeout rather than yielding to it, so a value below the lane budget lowers what CI granted, while the same literal reads as a widening where the host default is smaller. The hook budget travels with the test budget, and a case asserting a timeout keeps its outer wait far larger than the timeout under test. Restoring a granted budget, or sizing a bounded retry to measured contention, is named as distinct from the masking fixes the skill rejects. The diagnosis reference gains the platform differences under its platform class, a classification path for self-hosted pools that expose no host metrics, and the stopping rule for a signature no available host can reproduce.
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.