Tianyi Cui
3a88912a22
A repo-wide Not Invented Here audit (ten parallel domain surveys covering every package group, scripts/, native/, vendor/ edges, python/, test infrastructure, and CI) asked of each hand-rolled surface whether a maintained external package or Node builtin deletes it with a net win. Policy: new implemented process note records that a dependency which genuinely deletes owned code is a preferred simplification (bar: net deletion, health, boundary fit, settled seams stay); root AGENTS.md carries the one-line rule and dsh-find-simplifications now surveys for hand-rolled-where-a-dependency-exists candidates. Findings, all bilingual from birth: - proposed/simplification: eventsource-parser for llm-deepseek SSE, node:timers/promises for three hand-rolled sleeps, turndown (or minimal 'entities') for tool-web HTML->markdown, gate-script consolidation onto mdast/parseArgs/globSync - proposed/testing: execa + parseArgs + loadEnvFile + vi.waitFor for hand-rolled test subprocess plumbing - proposed/process: pnpm/action-setup for symmetric CI caching - proposed/feature: evaluate landstrip before building a Windows sandbox launcher - rejected/simplification: ~30 swap verdicts recorded (vscode-jsonrpc, p-retry, Ajv, write-file-atomic, msw, hono, better-sqlite3, wireit, landstrip-for-linux, YAML consolidation, ...) so the survey is not re-litigated from scratch Also drops the stale prompt/ entry from the AGENTS.md layout map (workspace instructions live in packages/context/workspace-context).
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.