Tianyi Cui
25098647e8
# Conflicts: # .agents/notes/implemented/architecture/2026-06-14-session-persistence.i18n.yaml # .agents/notes/implemented/architecture/2026-06-14-session-persistence.md # .agents/notes/implemented/architecture/2026-06-14-session-persistence.zh.md # .agents/notes/implemented/architecture/2026-08-08-bounded-session-persistence-write-batching.i18n.yaml # .agents/notes/implemented/architecture/2026-08-08-bounded-session-persistence-write-batching.md # .agents/notes/implemented/architecture/2026-08-08-bounded-session-persistence-write-batching.zh.md # .agents/notes/implemented/feature/2026-08-10-web-session-log-export.i18n.yaml # .agents/notes/implemented/feature/2026-08-10-web-session-log-export.md # .agents/notes/implemented/feature/2026-08-10-web-session-log-export.zh.md # apps/cli/tests/profiles/headless/tests/session-format-guard.expected.e2e.ts # apps/web/tests/message-actions.e2e.ts # apps/web/tests/scaffold-generation.spec.ts # apps/web/tests/scaffold.ts # apps/web/tests/seeded-history.e2e.ts # apps/web/tests/subagent-conversation.e2e.ts # docs/config-catalog.i18n.yaml # docs/config-catalog.md # docs/config-catalog.zh.md # docs/event-producer-consumer.i18n.yaml # docs/event-producer-consumer.md # docs/event-producer-consumer.zh.md # docs/persistence-catalog.i18n.yaml # docs/persistence-catalog.md # docs/persistence-catalog.zh.md # docs/subsystems/persistence.i18n.yaml # docs/subsystems/persistence.md # docs/subsystems/persistence.zh.md # docs/subsystems/session.i18n.yaml # docs/subsystems/session.md # docs/subsystems/session.zh.md # packages/api/session-controller/tests/session-projections.host.spec.ts # packages/core/agent-loop/tests/resume.spec.ts # packages/session-query/session-query-sqlite/tests/sqlite.spec.ts # packages/session-query/session-query/tests/tracing.spec.ts # packages/session/session-persistence-jsonl/README.i18n.yaml # packages/session/session-persistence-jsonl/README.md # packages/session/session-persistence-jsonl/README.zh.md # packages/session/session-persistence-jsonl/src/index.ts # packages/session/session-persistence-jsonl/tests/jsonl.spec.ts # packages/session/session-persistence-jsonl/tests/zstd.spec.ts # packages/session/session-persistence/tests/contract.ts # packages/session/session-persistence/tests/coordinator-contract.ts # packages/session/session-persistence/tests/persistence.spec.ts # packages/subagent/subagent/src/continuation.ts # packages/subagent/subagent/tests/list-children.spec.ts
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.