Review corrections on the observation record: - `pumpJobOutput` subscribes to `done` once and keeps one pending timer; racing the same pending promise every poll round retained a reaction per round for the life of the job. - The `ctx.jobOutput` effect disposer is async and awaits every open carrier's `dispose()`, so the fiber reports unloaded only once the old iterators are quiescent. - `SessionJob.record: true` replaces `outputTotal`: `append` never commits a roster change, so the mirrored count was stale while output flowed; the live offsets ride the observation stream's `opened` anchor. - The record is documented as a best-effort live preview whose cross-stream reordering is bounded by the poll interval. - The web e2e scenarios hold their background job on a test-owned barrier file instead of a wall-clock sleep, and each is one test rather than a chain sharing a job id.
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.