_Kerman b0c2e2bf01 refactor(session-title): keep title input as an O(1) projection
The titleInput unit no longer retains the full eligible message history
in bounded reverse-linked chunks. It folds only {first, last, count} —
the values scheduling and fallback reads need — and the full eligible
prefix for one provider generation is scanned from the session log at
execution time. The projection state is O(1) per session instead of
growing with every user message.

The README description updates accordingly and drops the inaccurate
"latest request route" claim; the projection test now asserts the
bounded aggregate and its checkpoint row.
2026-08-19 16:58:53 +08:00
2026-08-13 15:32:17 +08:00
2026-08-13 13:07:24 +08:00
2026-08-13 18:37:45 +08:00

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, served at http://127.0.0.1:3080 by default. 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

Community and support

Contributing

See CONTRIBUTING.md.

Development

Start with the development guide and architecture documentation.

For agents, follow AGENTS.md.

License

MIT

Third-party dependencies and their licenses are disclosed in THIRD_PARTY_NOTICES.md.

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