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https://github.com/deepseek-ai/deepseek-harness
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99 lines
4.8 KiB
Markdown
99 lines
4.8 KiB
Markdown
# DeepSeek Harness
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English | [中文](README.zh.md)
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DeepSeek Harness (`dsh`) is an open-source coding agent built on the DeepSeek Harness SDK.
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It uses an architecture where **everything is a plugin**.
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## Internal testing notice
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Thank you for taking the time to try DeepSeek Harness.
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This version is still in internal testing. Its functionality still needs improvement, and the experience may feel a little rough.
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“As one cuts and files, as one chisels and polishes.” A product grows through real encounters and candid feedback. Problems you discover in real use may prompt us to reconsider—or even overturn—our existing designs.
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We especially want to hear about failures, confusion, and friction. If you have any feedback or suggestions, please leave us a message in our <a href="https://wj.qq.com/s2/27234598/03eb/">WeCom group</a>. Every piece of feedback helps us refine it.
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## Install
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Install `dsh` with one command:
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```sh
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curl -fsSL https://raw.githubusercontent.com/deepseek-harness/deepseek-harness/master/scripts/install.sh | sh
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```
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The installer requires `git` and Node `^22.19 || >=24`, offers to install `pnpm` when it is missing, and prompts for a DeepSeek API key.
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The installer keeps every checkout under `~/.dsh/source`: the master clone at `~/.dsh/source/master` and each install's staging checkout as a git worktree `~/.dsh/source/staging-<timestamp>`. The stable symlink `~/.dsh/source/current` points at the active staging worktree, and `dsh` in `~/.local/bin` links to `current/bin/dsh`, so an upgrade repoints one symlink and the `dsh` on PATH never moves. Re-running the command adds a fresh staging worktree from an updated master and repoints `current` at it. See [`scripts/install.sh`](scripts/install.sh) for alternate install locations and other options.
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## Use DeepSeek Harness
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### Web UI
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For the recommended local interface, build the active checkout after installation and after each update, then start the Web UI:
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```sh
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(cd ~/.dsh/source/current && pnpm run build)
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dsh web
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```
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The full build produces the library and client bundles plus the frontend dist. The path above is the installer's default. If you set `DSH_SOURCE` or `DSH_CURRENT`, or reused an existing checkout, replace `~/.dsh/source/current` with that checkout path; see [`scripts/install.sh`](scripts/install.sh) for details. The Web UI is served at `http://127.0.0.1:3080` by default.
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### TUI
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Start the full-screen terminal interface:
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```sh
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dsh
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```
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### Headless
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Run one task, print the final answer, and exit:
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```sh
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dsh -p "summarize this workspace"
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```
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### Automation and SDKs
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From a source checkout with `DEEPSEEK_API_KEY` in the environment or its root `.env`, start the ACP automation server:
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```sh
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pnpm run demo:acp
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```
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The [Python SDK](python/README.md) drives a bundled JSON-RPC runtime. The [examples](examples/README.md) cover the runnable headless, ACP, JSON-RPC, Code Mode, and self-referential compositions.
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## Why DeepSeek Harness
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Built-in capabilities cover file reading, editing, and search; shell and persistent PTY execution; reusable skills; task tracking, goals, plans, todos, and background tasks; subagents and workflows; sandboxing and approvals; settings and credentials; persistent, resumable, forkable, and queryable sessions; LSP and web access; context compaction; and telemetry. Each composition selects the subset appropriate to its surface. The TUI and Web UI both include Plan Mode.
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- **Everything is a plugin.** Models, tools, policies, storage, context management, and interfaces are composable [Cordis plugins](docs/user/develop/basic/index.md), so deployments can extend or replace behavior without forking the agent loop. See the [architecture](docs/architecture.md) for the underlying design.
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- **Runs are reconstructable.** Anything visible to the model is logged in the authoritative session stream; persistence, resume/fork/query, replay, telemetry, and UIs derive from the same events. See the [session-log architecture](docs/architecture.md#session-log).
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- **Code Mode (opt-in).** It exposes a `run_code` tool and a generated TypeScript SDK; only program output re-enters model context. See [Code Mode](packages/core/tools/README.md#code-mode).
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- **Self-referential Cordis tools are opt-in.** They let the agent inspect its live runtime and mount or unmount plugins while it runs. See the [Cordis tools](packages/cordis/tool-cordis/README.md).
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## Community
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Follow <a href="https://x.com/Deepseekharness">DeepSeek Harness on Twitter</a> for project updates.
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## Development
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```sh
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pnpm install
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pnpm run test:coverage
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```
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Start with the [development guide](docs/development.md) and read the [architecture](docs/architecture.md) before changing packages.
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For agents, follow [AGENTS.md](AGENTS.md).
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DeepSeek Harness is currently in internal testing.
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## License
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[BSD 3-Clause](LICENSE)
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