0d6bfd8856
New process/ capability family: @deepseek-ai/dsh-process owns ctx.processes — abstract ProcessManager.spawn(spec) over a fully-explicit ProcessSpawnSpec — plus the shared DSH_* managed-environment and CollectedOutput vocabulary; @deepseek-ai/dsh-process-local carries the former bash-local run.ts plumbing (detached groups, tail-keep spill-backed output, credential scrub, kill escalation, kill-and-join disposal) with no config of its own. dsh-bash-local becomes a consumer: it keeps command defaulting, the fused deadline timedOut/aborted classification, the model-friendly terminal env (now merged through the ordinary env channel), and the [stderr]-marked background read merge, and spawns through ctx.processes. Background-process lifetime moves to the manager, so an executor reload no longer kills live background work; a background spawn failure is injected once into the read path instead of being buffered as fake stderr. dsh-bash re-exports the moved vocabulary so bash consumers keep one import root; dsh-bash-sandbox only redeclares the inherited inject. Every composition loading a bash executor now loads dsh-process-local (CLI, examples, python bundled runtime, create-sdk bash feature, inline test configs).
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.