# 🛠️ Steal Any Site's Design DNA — Feed It to Your AI **URL:** \ **Category:** Tools & Scripts\ **Tags:** programming, tips-tricks\ **Created:** [April 13, 2026, 1:33pm UTC](https://onehack.st/t/steal-any-sites-design-dna-feed-it-to-your-ai/321092 "2026-04-13T13:33:50Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![xtreme3535](https://onehack.st/letter_avatar_proxy/v4/letter/x/3d9bf3/32.png) [@xtreme3535](https://onehack.st/u/xtreme3535)\ **Post date:** [April 13, 2026, 1:33pm UTC](https://onehack.st/t/steal-any-sites-design-dna-feed-it-to-your-ai/321092/1 "2026-04-13T13:33:50Z")
# 🎨 Clone Any Website’s Design System in One Command — Then Hand It to Your AI _One CLI command. One markdown file. Your AI coding agent stops guessing and starts building exactly what you showed it._ **Your AI keeps generating ugly UIs because you never told it what “good” looks like.** Every time you prompt Claude Code, Cursor, or Copilot to build a landing page, it starts from zero. No color palette. No spacing rules. No idea what font you want. So it guesses — and you spend 20 minutes fixing buttons and padding that shouldn’t have been wrong in the first place. `DESIGN.md` fixes this. It’s a plain markdown file that captures an entire design system — colors, typography, spacing, components, motion, accessibility — in a format AI agents actually read. Google Stitch just made this concept official. And now there’s a free open-source CLI that generates one from any live website in seconds.\* * * * > **🧠 What's a DESIGN.md and Why Should You Care** > > Think of it as a README, but for how things should _look_. > > A regular README tells contributors how to install and run your code. A `DESIGN.md` tells your AI coding agent how to make your UI look consistent — what colors to use, what font sizes mean “heading” vs “body,” how much padding goes around a card, what a button should look like. > > Google introduced this concept through their AI design tool **Stitch** a few weeks ago, and it spread fast. The idea is simple: instead of describing your design system in every single prompt, you write it once in a markdown file. Drop it in your project root. Every AI agent — Claude Code, Cursor, Copilot, Stitch — reads it automatically and follows the rules. > > **Without DESIGN.md:** > You prompt → AI guesses fonts, colors, spacing → output looks generic → you manually fix everything → repeat for every component. > > **With DESIGN.md:** > You prompt → AI reads your design rules → output matches the style you want → you move on to the next thing. > > The difference between “build me a pricing page” producing something that looks like your app vs something that looks like a Bootstrap template from 2019. > **🛠️ What DesignerMD Actually Does — Under the Hood** > > Hey everyone! > I built an open-source tool called **DesignerMD** to solve a problem we all face: that awkward “blank page” phase when starting a new app. > > Here’s what happens when you point it at a URL: > > **Step 1 —** It fetches the website’s HTML, all linked stylesheets, inline styles, and font resources. > > **Step 2 —** It detects which CSS framework the site uses (Tailwind, Bootstrap, Bulma, Chakra, Material UI, Ant Design, or custom). > > **Step 3 —** It analyzes 11 design system layers and writes them into a single `DESIGN.md` file in your current directory. > > | Layer | What It Extracts | > | --- | --- | > | **Colors** | Semantic roles, accent palettes, gradients, harmony analysis, WCAG contrast scores | > | **Typography** | Font families, weight usage, heading hierarchy, letter-spacing, line-height scale | > | **Components** | Button styles, input fields, cards, navigation, badges, modals, tooltips, dropdowns, tables, avatars, toggles | > | **Layout** | Spacing scale (GCD analysis), border-radius scale, grid system detection (Flexbox vs CSS Grid) | > | **Shadows** | Shadow hierarchy, border-depth, glass/blur effects | > | **Motion** | Transitions, keyframe animations, duration scale, easing functions, reduced-motion support | > | **Accessibility** | Focus indicators, skip links, ARIA landmarks, screen reader utilities, outline reset detection | > | **Design Patterns** | Layout pattern, nav style, hero style, card style, component density, visual style | > | **Responsive** | Media query breakpoints, fluid typography (clamp), container queries, mobile-first detection | > | **Do’s & Don’ts** | Auto-generated rules based on the site’s actual design characteristics | > | **Agent Prompts** | Ready-to-use component prompts, page templates, and design system commands for your AI | > > > 💡 **Trick:** The “Agent Prompt Guide” section at the bottom of every generated DESIGN.md is the real power move. It gives you copy-paste prompts like _“Build a card component following the design system”_ that are pre-loaded with the exact tokens from the analysis. No more vague prompting. > **⚡ Install and Run — 60 Seconds Flat** > > **Option 1 — Global install (recommended):** > > ```auto > npm install -g designermd > > ``` > > **Option 2 — Clone and link:** > > ```auto > git clone https://github.com/sidhant947/designermd > cd designermd > npm install > npm link > > ``` > > **Run it:** > > ```auto > designermd > > ``` > > It asks for a URL. Enter any website. Wait a few seconds. `DESIGN.md` appears in your current directory. > > **Example output when pointed at linear.app:** > > ```auto > Colors: 9 semantic roles | 5 accents > Typography: 7 levels | 33 fonts | 7 weights > Components: 3 detected > Layout: CSS Grid | base unit: 4px | max-width: 640px > Motion: playful | 5 transitions | 5 animations > A11y: 3/4 checks passed | contrast: AAA > Responsive: 4 breakpoints | fluid type: yes > > ``` > > That entire analysis lands in a single `.md` file you drop into any project. > > > 💡 **Trick:** Run it against your competitor’s site. Now your AI builds pages that look as polished as theirs — using their own spacing scale, color system, and component patterns as the starting blueprint. > **🤖 How to Use It With Your AI Coding Agent** > > The generated `DESIGN.md` works with any AI agent that reads project files. Here’s how to use it with the big ones: > > **Claude Code:** > Drop `DESIGN.md` in your project root. Claude Code reads it automatically. Prompt: _“Build the landing page following the design system in DESIGN.md.”_ > > **Cursor:** > Same thing — place it in the project root. Cursor’s AI picks it up as context. Reference it in your prompt or let it auto-detect. > > **GitHub Copilot / GPT-5:** > Add `DESIGN.md` to your workspace. Reference it explicitly: _“Use the color tokens and typography from DESIGN.md for this component.”_ > > **Google Stitch:** > Stitch natively supports the DESIGN.md format — it was designed for exactly this file type. Import it directly into your Stitch project for consistent generation. > > | What You Say | What Actually Happens | > | --- | --- | > | _“Follow DESIGN.md”_ | AI uses extracted color tokens, spacing scale, font hierarchy instead of guessing | > | _“Build a card component”_ | AI checks DESIGN.md for card styles, border-radius, shadow levels, padding values | > | _“Make this responsive”_ | AI reads the breakpoint map and fluid type settings from the analysis | > | _“Match the existing design”_ | AI has the complete design DNA — it’s not matching vibes, it’s matching data | > > > 💡 **Trick:** Stack multiple DESIGN.md files. Analyze 3-4 sites you admire, rename them (`linear-design.md`, `stripe-design.md`), then tell your AI: _“Combine the typography from linear-design.md with the color system from stripe-design.md.”_ You just built a custom design system without opening Figma. > **🔄 DesignerMD vs Other Options — What Else Exists** > > The DESIGN.md ecosystem is moving fast. Here’s where DesignerMD fits: > > | Tool | What It Does | Pros | Cons | > | --- | --- | --- | --- | > | **[DesignerMD](https://github.com/sidhant947/designermd)** | CLI that analyzes a live URL and generates DESIGN.md | Automated, real-time analysis, 11 layers deep, npm install | Early-stage project, single developer | > | **[awesome-design-md](https://github.com/VoltAgent/awesome-design-md)** | Curated collection of 55+ pre-made DESIGN.md files from popular sites | Ready to use, covers Stripe/Vercel/Linear/Notion etc. | Static files — doesn’t analyze YOUR target site | > | **Google Stitch** | AI design tool with built-in DESIGN.md extraction | Native support, generates full UI too | Requires Google account, limited to Stitch workflow | > | **[Design MD Skills](https://www.figma.com/community/plugin/1612814320994608244)** (Figma Plugin) | Exports DESIGN.md from Figma designs | Works from your actual design files | Requires Figma, tied to their ecosystem | > > **The gap DesignerMD fills:** You want a DESIGN.md from a specific live website — not from a pre-made collection, not from a Figma file, not through a Google tool. Just point a CLI at any URL and get back a comprehensive analysis. That’s it. > > > 💡 **Trick:** Use them together. Grab a pre-made file from awesome-design-md as your baseline, then run DesignerMD against the actual live site to see what’s changed since the static file was created. Sites update their design systems constantly. > **🎯 Real Workflows That Make This Click** > > **Freelancer starting a client project:** > Client says “make it look like Notion.” You run `designermd`, enter notion.so, get a complete design spec in 10 seconds, drop it into your project, and your AI builds pixel-accurate layouts from the first prompt. Client thinks you’re a genius. > > **Indie hacker building a SaaS:** > You like how Linear looks but can’t afford a designer. Analyze linear.app. Now you have their exact spacing scale, color tokens, and typography hierarchy. Your AI builds components that feel premium because the design DNA is premium. > > **Team rebuilding an existing product:** > Your own marketing site looks great but the app is inconsistent. Run DesignerMD against your marketing site. Now your AI builds the app using the same tokens — brand consistency without a 50-page style guide. > > **Learning CSS design systems:** > Analyze 10 different sites. Compare the generated DESIGN.md files side by side. You’ll learn more about professional design systems in an hour than in a semester of design courses. Every file is a case study. > **⚠️ What to Know Before You Run It** > > **It’s early.** This is a fresh open-source project — 10 commits, single developer. It works, but expect rough edges. If something breaks, open an issue on GitHub. > > **It analyzes what’s publicly visible.** The tool reads CSS that the browser can see. If design tokens are buried in JavaScript runtime or behind authenticated routes, they won’t be captured. > > **CSS framework detection isn’t magic.** It checks for Tailwind, Bootstrap, Bulma, Chakra, Material UI, and Ant Design. Custom frameworks or heavily modified setups might show as “Custom.” > > **The output is a starting point.** The generated DESIGN.md gets you 80-90% there. You’ll likely want to tweak specific values, add project-specific rules, or remove sections that don’t apply. > > **Node.js required.** It’s an npm package — you need Node.js installed on your machine. * * * **⚡ Quick Hits** | Want | Do | | --- | --- | | 🎨 Clone any site’s design system | → `npm install -g designermd` → run `designermd` → enter URL | | 🤖 Stop AI from guessing your UI | → Drop the generated DESIGN.md in project root | | 📋 Pre-made files for popular sites | → [awesome-design-md](https://github.com/VoltAgent/awesome-design-md) has 55+ ready to use | | 🔀 Mix design systems from multiple sites | → Analyze several URLs, rename files, tell AI to combine | | ⭐ Support the developer | → Star the repo on [GitHub](https://github.com/sidhant947/designermd) | * * * I’d love to hear how you guys are using this in your AI workflows. If you find it helpful, please drop a ⭐ on the repo! Let’s chat in the comments! _One markdown file. Zero design guesswork. Your AI finally builds what you actually wanted._