Replace per-plugin tapIndex regex edits with pure-data IndexInjection rows collected fresh per render over one webserver/index-inject event. One table, two renderers: the served form renders rows into index.html; a static worker form ships the same rows over its boot payload. tapIndex survives as the raw-HTML escape hatch, applied after row rendering; client-modules and ui-theme move to the event, and the manifest global renders as globalThis["__DSH_BOOT__"]. The client boot chain gains the seams a pre-injected transport needs: the module loader takes loadBundle from the transport global by default, HTTP prefetch stands down when a transport owns bundle bytes, the web-app bundle can decline frontend serving, the gateway client installs a namespace's whole method group inside its fiber apply so a parked dependent never observes the service without its methods, and the dynamic-code precheck gates through new Function so hosts without a real node:vm keep the define-time parse gate.
DeepSeek Harness
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DeepSeek Harness (dsh) is an open-source agent harness developed by DeepSeek AI.
It uses an architecture where everything is a plugin, and is powered by Cordis, whose design is described in A Programming Paradigm for Spatiotemporal Composability.
Developer preview
DeepSeek Harness is currently in developer preview and is iterating rapidly. THERE WILL BE COMPATIBILITY-BREAKING CHANGES.
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
- Feel free to 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.