3672cd25b4
Review direction (tianyicui, PR #660): in a stacked PR, change all other process-running places to use the new service. - lsp-local: LspConnection spawns through ctx.subprocess (piped protocol streams + a no-spill collected stderr tail); its private process-tree helpers (POSIX group signalling, Windows taskkill, liveness polling) are deleted in favor of the seam's handle verbs, and its buildChildEnv now rides scrubbedParentEnv (LSP children also stop inheriting stale DSH_*). The plugin injects 'subprocess'; compositions/tests mount dsh-subprocess-local. - subagent-acp: the ACP child spawns through the seam (piped ndjson streams, inherited stderr); spawn failure surfaces through done-rejection into the same startup race; disposal is handle.dispose with the plugin's configured graces. dsh-subagent-subprocess is DELETED — its dispose ladder and scrub are the seam's, and the isolated-config-dir helper had no consumer. - mcp-client, pty-local, sdk-helper: adopt scrubbedParentEnv as the one scrub definition (their spawns stay put by ownership: the MCP SDK and node-pty own those calls; the SDK wizard runs outside any composition). - Coverage: per-file 100% over every touched src file, with each v8 ignore carrying a platform or contract reason; new suites cover stdio dispositions, the dispose ladder tiers, injected-win32 tree semantics, waitForExit, settled-kill/terminate no-ops, and spawn-failure disposal. - Docs: consumer-migration Agent Note (en; zh follows in this PR), seam note updated in place, subprocess.md rewritten for the reshaped vocabulary (type-equiv re-registered), READMEs and SERVICE_ROLES updated, taskkill added to knip ignoreBinaries.
DeepSeek Harness
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DeepSeek Harness (dsh) is an open-source coding agent built on the DeepSeek Harness SDK.
It uses an architecture where everything is a plugin.
Install
Install dsh with one command:
curl -fsSL https://raw.githubusercontent.com/deepseek-harness/deepseek-harness/master/scripts/install.sh | sh
The installer requires git and Node ^22.19 || >=24, offers to install pnpm when it is missing, and prompts for a DeepSeek API key.
The installer clones DeepSeek Harness to ~/.dsh/source, links dsh into ~/.local/bin, and launches it. Re-running the command updates the checkout. See scripts/install.sh for alternate install locations and other options.
Use DeepSeek Harness
Web UI
For the recommended local interface, build the frontend after installation and after each update, then start the Web UI:
pnpm --dir ~/.dsh/source run build && pnpm --dir ~/.dsh/source run build:web
dsh web
The Web UI is served at http://127.0.0.1:3080 by default.
TUI
Start the full-screen terminal interface:
dsh
Headless
Run one task, print the final answer, and exit:
dsh -p "summarize this workspace"
Why DeepSeek Harness
Built-in capabilities cover file reading, editing, and search; shell execution; reusable skills; task tracking; subagents and workflows; persistent sessions; and context compaction. The TUI also includes Plan Mode.
- Everything is a plugin. Models, tools, policies, storage, context management, and interfaces are composable Cordis plugins, so deployments can extend or replace behavior without forking the agent loop. See the architecture for the underlying design.
- Code Mode (opt-in). It exposes a
run_codetool and a generated TypeScript SDK; only program output re-enters model context. See Code Mode. - 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.
Community
Follow DeepSeek Harness on Twitter for project updates.
Development
pnpm install
pnpm run test:coverage
Start with the development guide and read the architecture before changing packages.
For agents, follow AGENTS.md.
DeepSeek Harness is currently pre-release.