Yichen Jiang
b2c9c3ce37
A caret Backspace or Delete replaces no selection, so `beforeinput` reports the bare caret and the previous derivation produced a negative inserted length and fell back to the ambiguous scan. The delete half of the defect survived, and the component test missed it by pre-expanding the selection to the span the engines never report. The range for a caret delete now comes from the direction `inputType` names and the number of characters the draft actually lost, measured rather than assumed to be one, so a grapheme, word, or line deletion sizes correctly. Only the insert and delete families are recorded; a history replay reports wherever the caret sits and would name a wrong span while passing every check. Component tests cover the caret Backspace, Delete, and word-delete gestures, and an assembled browser scenario drives them as real key presses, which is the only place an engine's reported range is observable.
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.