The proposed and implemented 2026-09-02 feature triplets record the same decision. Keeping the proposal active presents obsolete node-0/config-change rules as live work even though PR3483 already shipped the capability. Delete the complete proposed EN/ZH/sidecar triplet rather than archive a proposal or retain a redundant rejection. Read both complete bilingual notes before consolidation. The implemented owner already retains the motivation, all five proposal alternatives, cache cost and proxy/model risks, capability validation, and current snapshot/e2e evidence. Preserve the still-valid unchanged-prompt/resume lifecycle verification and both SDK typed appended-event expected-output requirement in its Testing paragraph. Explicitly identify missing SDK appended-event coverage instead of treating the headless snapshot as SDK evidence. Do not revive the obsolete plan-mode fixture or absolute cache-hit inequality; the implemented note records the shipped fixture and comparative e2e assertion. Only the implemented Testing paragraph and pairing record change. Runtime, accounting, UI, and frozen archived notes are untouched. Active inbound references already target the implemented owner, so no link retarget is necessary. This commit addresses only the reviewed lifecycle/consolidation finding. Focused evidence (all exit 0): pnpm install --frozen-lockfile; pnpm run verify-translation-pairing --write .agents/notes/implemented/feature/2026-09-02-in-history-system-prompt-replacement.md (1 record written); pnpm run verify-translation-pairing .agents/notes/implemented/feature/2026-09-02-in-history-system-prompt-replacement.md (1 named pair consistent); pnpm run verify-md-links (1381 files, all links/fragments resolve); pnpm run verify-agent-note-format (246 notes conform); git diff --check; git diff --cached --check. Full combined doc-sync remains with the parent integration branch after runtime fixes; no full gates, push, rebase, or hook bypass.
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.