Tianyi Cui
fe2ac749b9
These two current fixtures already contain system/message, so searching
only for stale request/header.system misses their persisted replay drift.
Both omit the shipped standard agentPreset. Plan exit must replace the
first system message (sequence 10), not append a second system prompt.
The Goal fixture's first get_goal result must reference its own tool call
at sequence 18 rather than the preceding bash call at sequence 16.
Refresh both owning browser scenarios. Retain the writer's canonical
embedded Assistant stream packing and refreshed timing where repacking
requires it. Expanded stream chunks, all 44 user/model/tool messages and
calls, and the deliberate shuf command failure remain unchanged. The
plan title remains before request/header on this lower branch. No UI,
runtime, normalizer, test-driver, or frozen v0/v1 files change.
Evidence at lower d29574fed9, reusing the dedicated tree's own prior build
(the intervening subagent spacing edits do not affect these owners):
- DSH_SNAPSHOT=replay pnpm exec vitest run --config vitest.web.config.ts apps/web/tests/{plan-review,goal-multi-turn-actions}.e2e.ts: before refresh, both owners failed persisted-session comparisons.
- DSH_SNAPSHOT=refresh pnpm exec vitest run --config vitest.web.config.ts apps/web/tests/{plan-review,goal-multi-turn-actions}.e2e.ts: 2 files passed, 4 tests passed, 1 record-only test skipped (10.24s).
- DSH_SNAPSHOT=replay pnpm exec vitest run --config vitest.web.config.ts apps/web/tests/{plan-review,goal-multi-turn-actions}.e2e.ts: 2 files passed, 4 tests passed, 1 record-only test skipped (10.24s).
- JSON payload comparison: all 44 messages/calls and expanded chunk content
across all 14 Assistant streams preserved; stream timing is excluded.
- git diff --check passed; only the two current session.v2.jsonl files changed.
DeepSeek Harness
English | 中文
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.