AI agents have been blindly guessing your UI this whole time. Here’s the file that fixes it.

Every time you ask an AI coding agent to build UI, it invents everything from scratch.

Colors. Fonts. Spacing. Button styles. All of it - made up on the spot, based on nothing.

You'd never hand a designer a blank brief and say "just figure out the vibe." But that's exactly what we've been doing with AI agents for years.

Google Stitch introduced a concept called DESIGN.md - a plain markdown file that sits in your project root and tells your AI agent exactly how the UI should look. Color palette, typography, component behavior, spacing rules, do's and don'ts. Everything.

The agent reads it once. Then it stops guessing.

I took this concept and built a library of 27 DESIGN.md files extracted from popular sites - GitHub, Discord, Shopify, Steam, Anthropic, Reddit, and more - so developers don't have to write them from scratch.

The entire library was built using Claude Code. The AI built the tool that fixes AI.

MIT license. Free. Open source.

The wild part: this should have existed two years ago.