Source: https://seerepo.com/compare/deepseek-ai/deepseek-harness/vs/shadcn-ui/ui
Markdown source: https://seerepo.com/compare/deepseek-ai/deepseek-harness/vs/shadcn-ui/ui.md
Description: deepseek-harness and ui share 3 technologies: React, Vite, and MCP. Both are written in TypeScript. Side by side: stack, size, who writes it, activity and tests.

# deepseek-harness vs ui

deepseek-harness and ui share 3 technologies: React, Vite, and MCP. Both are written in TypeScript.

- [deepseek-ai/deepseek-harness](https://seerepo.com/r/deepseek-ai/deepseek-harness/built): DeepSeek Harness: Everything is a Plugin.
- [shadcn-ui/ui](https://seerepo.com/r/shadcn-ui/ui/built): Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.

## Side by side

| | deepseek-harness | ui |
|---|---|---|
| Stack | TypeScript: React, Vite, MCP, GitHub, Anthropic | TypeScript: React Router, React, Vite, Next.js, MCP, Vercel |
| Size | 1,377,558 lines written, 2,802 code files | 636,228 lines written, 3,892 code files |
| Who writes it | 12.9% of its commits signed by AI. With Codex and Claude Code | 3% of its commits signed by AI. With Claude Code, Cursor, GitHub Copilot, Codex, and Devin |
| Activity | Last push October 23, 2026, 14,875 commits, 262,598 stars | Last push October 26, 2026, 2,276 commits, 126,639 stars |
| Tests | 3,030 test files. 70.4% of its code files have a test that imports them | 414 test files. 3.8% of its code files have a test that imports them |

## What they share and what sets them apart

- In common: React, Vite, MCP
- Only in deepseek-harness: GitHub, Anthropic
- Only in ui: React Router, Next.js, Vercel

## Sources

- deepseek-ai/deepseek-harness: Read on October 27, 2026, at commit 22ddee3 (https://github.com/deepseek-ai/deepseek-harness/tree/22ddee3792402c3e70ec5f86a63c3e3e895a2f60)
- shadcn-ui/ui: Read on October 27, 2026, at commit 8f04138 (https://github.com/shadcn-ui/ui/tree/8f04138777c1b6996e709993362a7b0a12888ecf)