- session.killJob maps job-not-found from the lookup only: jobs.get gates the same synchronous span, so a producer-cancel throw now propagates per the registry contract (job state unchanged) instead of masquerading as a lookup failure (threads r3860226021, r3860226047). - session.killJob applies the service-wide subagent ownership fence exactly as cancel does; a subagent-owned live session rejects with the ownership error and the child-owned job stays running (thread r3860226041). - The stop control stays pending on an admitted kill: the unary response and the jobs frames have no cross-carrier ordering, so only the authoritative frame (the row leaving the killable set) releases the button, closing the duplicate-kill window (thread r3860226028). - One-line comment on the killReason assignment stating last-writer-wins is intended, beside the first-claim-wins reported handling (thread r3860225999). Host spec pins the producer-throw propagation and the fence; the component spec pins pending-until-frame; the Agent Note records both refinements.
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.