design-extract

name	design-extract
description	Extract a public website's design system when a task needs evidence about its colors, typography, spacing, radii, shadows, components, or Tailwind tokens.

Design Extract

Extract any website's design system from its public URL. No login, no API key, no Figma.

When to use

• User pastes a URL and wants to understand its visual design
• User wants to replicate a site's look and feel
• User asks "what design system does X use?"
• User wants a DESIGN.md for AI context
• User wants to match an existing site's tokens in their own project

How it works

1. Fetch the URL's HTML and all linked stylesheets
2. Parse CSS for: custom properties, colors, fonts, spacing, radii, shadows
3. Send extracted raw data to Claude for structured synthesis
4. Output a DESIGN.md with: color system, typography, spacing, borders, component patterns, Tailwind config sketch

Usage

# CLI
memi design-doc https://linear.app
memi design-doc https://stripe.com --spec    # also write a DesignSpec JSON
memi extract https://vercel.com              # alias

# MCP tool
design_doc({ url: "https://linear.app" })

Output format

The DESIGN.md contains:

• Color System -- palette with semantic names (primary, bg, fg, muted, accent)
• Typography -- font stacks, size scale, weight usage
• Spacing -- scale (4px/8px grid or other rhythm)
• Borders & Surfaces -- radii, shadows, border styles
• Component Patterns -- inferred from DOM (buttons, cards, inputs, nav)
• Tailwind Config Sketch -- partial tailwind.config.js with extend values

Success criteria

• Extraction completes in under 30 seconds for any public URL
• Output contains at least 10 distinct design tokens
• Tailwind config sketch is valid JavaScript
• DESIGN.md is immediately usable as AI prompt context

Limitations

• Does not work on pure client-side rendered apps (CSR) that inject all styles via JS at runtime
• Works on: static sites, SSR (Next.js, Remix, SvelteKit), and any site that serves CSS in <link> or <style> tags