Review fixes (ds-review-bot warnings on #623): - One chain, every consumer: the override resolution (own post-seed switches ?? header baseline, closed-vocabulary validated) moves into pure exports (sandboxOverrideOf / approvalOverrideOf); the services delegate, and the permission presets consume them — current(session) and set() now see inherited baselines, so a child inheriting danger-full-access gets REAL knob switches when workspace-write is selected instead of a silent no-op, and a seed-carried preset selection is subsumed by the baseline. current(events) becomes current(session) (pre-release; the only callers were tests). - Unconditional durable validation: a malformed header baseline fails loud on every read, no longer shadowed by an own switch. - The two policy peers are declared optional (peerDependenciesMeta), so a thin spawn/fork deployment without policy plugins can consume the driver; verify-runtime-closure honors the flag. Red-first: inherited-preset derive/switch-away and seeded-selection tests in the permission suite; malformed-baseline-with-own-switch tests in both policy suites.
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.