Source: https://seerepo.com/uses/postcss
Markdown source: https://seerepo.com/uses/postcss.md
Description: 11 public repos that SeeRepo read use PostCSS. It's used most with Vite, React, and @clack/prompts.

# Open source repos that use PostCSS

11 public repos that SeeRepo read use PostCSS. It's used most with Vite, React, and @clack/prompts.

## Used most with

- Vite: 7 repos
- React: 5 repos
- @clack/prompts: 3 repos
- Vue: 2 repos
- Less: 2 repos
- Express: 2 repos
- Next.js: 2 repos
- emotion: 2 repos

## The repos, by stars

1. [vercel/next.js](https://seerepo.com/r/vercel/next.js): JavaScript · 143,262 stars · 0.8% signed by AI — The React Framework
2. [shadcn-ui/ui](https://seerepo.com/r/shadcn-ui/ui): TypeScript · 127,326 stars · 3% signed by AI — Composable, accessible components with thoughtful defaults. Build your own component library with code you can customize, extend, and make your own.
3. [thedotmack/claude-mem](https://seerepo.com/r/thedotmack/claude-mem): TypeScript · 112,476 stars · 61.1% signed by AI — Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future sessions. Works with Claude Code, OpenClaw, Codex, Gemini, Hermes, Copilot, OpenCode + More
4. [mui/material-ui](https://seerepo.com/r/mui/material-ui): JavaScript · 99,297 stars · 0.3% signed by AI — Material UI: Comprehensive React component library that implements Google's Material Design. Free forever.
5. [tailwindlabs/tailwindcss](https://seerepo.com/r/tailwindlabs/tailwindcss): TypeScript · 98,062 stars · 0.2% signed by AI — A utility-first CSS framework for rapid UI development.
6. [vitejs/vite](https://seerepo.com/r/vitejs/vite): TypeScript · 83,723 stars · 0.7% signed by AI — Next generation frontend tooling. It's fast!
7. [unslothai/unsloth](https://seerepo.com/r/unslothai/unsloth): Python · 79,050 stars · 1% signed by AI — Local UI to run and train LLMs and diffusion models. Supports GGUF, MLX, Qwen3.8, DeepSeek-V4.1, MiniMax-H3, Gemma 4, FLUX and more.
8. [heygen-com/hyperframes](https://seerepo.com/r/heygen-com/hyperframes): TypeScript · 78,891 stars · 19.1% signed by AI — Write HTML. Render video. Built for agents.
9. [youzan/vant](https://seerepo.com/r/youzan/vant): TypeScript · 24,410 stars — A lightweight, customizable Vue UI library for mobile web apps.
10. [beekeeper-studio/beekeeper-studio](https://seerepo.com/r/beekeeper-studio/beekeeper-studio): TypeScript · 23,844 stars · 6.7% signed by AI — Modern and easy to use database GUI & SQL client for MySQL, Postgres, SQLite, SQL Server, ClickHouse, and more. Linux, MacOS, and Windows.
11. [marimo-team/marimo](https://seerepo.com/r/marimo-team/marimo): Python · 23,418 stars · 3.6% signed by AI — A reactive notebook for Python — run reproducible experiments, query with SQL, execute as a script, deploy as an app, and version with git. Stored as pure Python. All in a modern, AI-native editor.

## Frequently asked questions

### What is the most popular open source repo that uses PostCSS?

vercel/next.js, with 143,262 stars on GitHub.

The proof: [vercel/next.js on GitHub](https://github.com/vercel/next.js)

### What other technologies is PostCSS used with?

With Vite (7), React (5), @clack/prompts (3), Vue (2), and Less (2), out of the 11 repos that use it.

### What languages are the repos that use PostCSS written in?

TypeScript (7), JavaScript (2), and Python (2).

### How many repos that use PostCSS have commits signed by AI?

10 of the 11; the most, thedotmack/claude-mem, with 61.1% of its commits.

The proof: [the commits each tool signed in thedotmack/claude-mem](https://seerepo.com/r/thedotmack/claude-mem/ai)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.