designlang

designlang points a headless browser at any URL and reads the design system off the live DOM. One command emits 17+ files — DTCG tokens, Tailwind config, shadcn theme, Figma variables, motion tokens, typed component anatomy, brand voice, page-intent labels, and a paste-ready prompt pack for v0 / Lovable / Cursor / Claude Artifacts.

It also goes where extractors don't: layout patterns, responsive behavior across 4 breakpoints, hover / focus / active states, WCAG contrast scoring, multi-page consistency, drift checks against a live source-of-truth, visual-diffs, and a shareable graded report card.

Quick start

npx designlang https://stripe.com                      # extract everything
npx designlang pair stripe.com linear.app              # fuse two designs (visuals A × voice B)    ← v12.8
npx designlang brand stripe.com                        # full brand-guidelines book (13 chapters)  ← v12.7
npx designlang theme-swap stripe.com --primary "#ff4800"  # recolour around your brand        ← v12.6
npx designlang pack stripe.com                         # one polished design-system directory ← v12.4
npx designlang remix stripe.com --as cyberpunk         # restyle in another vocabulary       ← v12.3
npx designlang remix stripe.com --all                  # emit all 6 vocabs at once           ← v12.3
npx designlang grade https://stripe.com --badge        # report card + SVG badge             ← v12.2
npx designlang battle stripe.com vercel.com            # head-to-head graded fight           ← v12.2
npx designlang clone https://stripe.com                # working Next.js starter
npx designlang --full https://stripe.com               # screenshots + responsive + interactions

Drop a live design-score badge in any README:

![Design Score](https://designlang.app/badge/stripe.com.svg)

Install

npm i -g designlang                         # global
npx skills add Manavarya09/design-extract   # as an agent skill (40+ agents)

What you get

Each run writes 17+ files to ./design-extract-output/. The headline outputs:

File	What it is
*-design-language.md	19-section markdown — feed any LLM to recreate the design
*-design-tokens.json	W3C DTCG tokens (primitive + semantic + composite layers)
*-tailwind.config.js	Drop-in Tailwind theme
*-shadcn-theme.css	shadcn/ui globals.css variables
*-figma-variables.json	Figma Variables import (light + dark)
*-variables.css	CSS custom properties
*-anatomy.tsx	Typed React stubs for every detected component + variants
*-motion-tokens.json	Durations, easings, springs, scroll-linked flag
*-voice.json	Brand voice — tone, pronoun posture, CTA verbs
*-prompts/	Paste-ready prompts for v0, Lovable, Cursor, Claude Artifacts
*-mcp.json	Disk-backed MCP server payload
*-grade.html	v12.1 Shareable Design Report Card (letter grade + evidence)
*-grade.svg	v12.2 Shields.io-style design-score badge (drop into any README)
*-battle.html	v12.2 Head-to-head graded battle card from designlang battle
*-remix.<vocab>.html	v12.3 Site restyled in another vocabulary — brutalist / swiss / art-deco / cyberpunk / soft-ui / editorial

Multi-platform (--platforms web,ios,android,flutter,wordpress,all) adds ios/, android/, flutter/, and a WordPress block theme. --emit-agent-rules adds Cursor / Claude Code / generic agent rule files.

Why designlang vs anything else

Other tools give you the paint. designlang reads the architecture:

• Layout system — grids, flex containers, container widths, gaps — not just tokens.
• Responsive — crawls 4 breakpoints and reports what changes (--responsive).
• Interaction states — programmatically hovers and focuses, captures the deltas (--interactions, --deep-interact).
• Motion language — durations, easing families, spring detection, scroll-linked flag, feel fingerprint (springy / smooth / mechanical / mixed).
• Component anatomy — slot trees with variant × size × state matrices, emitted as typed .tsx.
• Brand voice — tone, pronoun posture, heading style, CTA verb inventory.
• Page intent + section roles — landing / pricing / docs etc., with semantic regions (hero, feature-grid, pricing-table, cta…).
• Multi-page consistency — auto-discovers canonical pages, reconciles shared vs per-route tokens.
• WCAG — every fg/bg pair scored, with a remediation palette suggesting nearest passing colors.
• Drift + lint + visual-diff — designlang drift, lint, visual-diff all CI-ready, exit non-zero on failure.
• Live-site sync — treat the deployed site as source of truth (designlang sync).
• MCP server — designlang mcp exposes tokens, regions, components, and contrast pairs to any MCP-aware agent.

designlang grade https://stripe.com         # ← v12.1: shareable report card
designlang clone https://stripe.com         # → working Next.js app
designlang apply https://stripe.com -d ./app   # auto-detect framework, write tokens
designlang brands stripe.com vercel.com linear.app   # N-brand matrix
designlang drift https://yourapp.com --tokens ./src/tokens.json
designlang lint ./src/tokens/design-tokens.json     # CI-ready linter
designlang visual-diff https://staging.app https://app   # single-file HTML diff
designlang mcp                              # stdio MCP server for Cursor / Claude Code

All features

Feature	Flag / Command	Description
Base extraction	designlang <url>	Colors, typography, spacing, shadows, radii, CSS vars, breakpoints, animations, components
Layout system	automatic	Grid patterns, flex usage, container widths, gap values
Accessibility	automatic	WCAG 2.1 contrast ratios for all fg/bg pairs
Design scoring	automatic	7-category quality rating (A-F) with actionable issues
Gradients	automatic	Gradient type, direction, stops, classification
Z-index map	automatic	Layer hierarchy, z-index wars detection
SVG icons	automatic	Deduplicated icons, size/style classification, color palette
Font files	automatic	Source detection (Google/self-hosted/CDN/system), @font-face CSS
Image styles	automatic	Aspect ratios, shapes, filters, pattern classification
Dark mode	--dark	Extracts dark color scheme + light/dark diff
Auth pages	--cookie, --cookie-file, --header	Extract from authenticated/protected pages; cookie files in JSON / Playwright storageState / Netscape formats
Self-signed / dev TLS	--insecure	Ignore HTTPS/SSL certificate errors
User-Agent override	--user-agent <ua>	Set a custom User-Agent string
Chrome extension	chrome-extension/	One-click handoff from any tab, MV3, activeTab only
Multi-page	--depth <n>	Crawl N internal pages; emits shared-vs-per-route token reconciliation (*-tokens-shared.json, *-tokens-routes/<slug>.json, *-routes-report.md)
Screenshots	--screenshots	Capture buttons, cards, inputs, nav, hero, full page
Responsive	--responsive	Crawl at 4 viewports, map breakpoint changes
Interactions	--interactions	Capture hover/focus/active state transitions
Auto-interact	--deep-interact	Scroll, open menus/modals/accordions, hover CTAs before extraction
Everything	--full	Enable screenshots + responsive + interactions + deep-interact
Apply	designlang apply <url>	Auto-detect framework and write tokens to your project
Clone	designlang clone <url>	Generate a working Next.js starter with extracted design
Score	designlang score <url>	Rate design quality with visual bar chart breakdown
Grade (v12.1)	designlang grade <url>	Shareable HTML "Design Report Card" — letter grade, 8 dimensions, evidence, strengths + fixes
Battle (v12.2)	designlang battle <A> <B>	Head-to-head graded battle card with verdict, dimension table, palette comparison
Badge (v12.2)	designlang grade --badge	Shields.io-style SVG badge — design · B · 87 — drop into any README. Live endpoint: designlang.app/badge/<host>.svg
Remix (v12.3)	designlang remix <url> --as <vocab>	Restyle the audited page in another vocabulary (brutalist / swiss / art-deco / cyberpunk / soft-ui / editorial). --all emits all 6
Pack (v12.4)	designlang pack <url>	Bundle every output (tokens / components / Storybook / starter / prompts) into one polished design-system directory
Theme-swap (v12.6)	designlang theme-swap <url> --primary <hex>	Recolour the extracted design around a new brand primary. OKLCH hue rotation, neutrals preserved, type/spacing/motion untouched
Brand book (v12.7)	designlang brand <url>	Full editorial brand-guidelines document (13 chapters: cover, about, logo, colour, type, spacing, shape, iconography, motion, components, voice, a11y, tokens, how-to-use). Print-ready, dark-mode toggle, hand-off-ready
Pair (NEW v12.8)	designlang pair <urlA> <urlB>	Fuse two designs across 7 axes (colours/type/spacing/shape/motion/voice/components). Defaults to "visuals from A, voice + type from B". --brand also emits a brand book of the fused identity
Watch	designlang watch <url>	Monitor for design changes on interval
Diff	designlang diff <A> <B>	Compare two sites (MD + HTML)
Multi-brand	designlang brands <urls...>	N-site comparison matrix
Sync	designlang sync <url>	Update local tokens from live site
History	designlang history <url>	Track design changes over time
MCP server	designlang mcp	Expose extraction as MCP resources + tools
Multi-platform	--platforms <csv>	Emit iOS / Android / Flutter / WordPress outputs
Agent rules	--emit-agent-rules	Cursor, Claude Code, generic agent rule files
Stack fingerprint	automatic	Framework + Tailwind + analytics detection
CSS health	automatic	Specificity, !important, unused CSS, keyframes
A11y remediation	automatic	Nearest palette color passing AA / AAA for every failing pair
Semantic regions	automatic	nav / hero / pricing / testimonials / cta / footer classification
Reusable components	automatic	DOM subtree + style-vector clustering with variants
DTCG tokens	default	W3C Design Tokens v1 with semantic + composite layers (--tokens-legacy for pre-v7)

Full CLI Reference

designlang <url> [options]

Options:
  -o, --out <dir>         Output directory (default: ./design-extract-output)
  -n, --name <name>       Output file prefix (default: derived from URL)
  -w, --width <px>        Viewport width (default: 1280)
  --height <px>           Viewport height (default: 800)
  --wait <ms>             Wait after page load for SPAs (default: 0)
  --dark                  Also extract dark mode styles
  --depth <n>             Internal pages to crawl (default: 0)
  --screenshots           Capture component screenshots
  --responsive            Capture at multiple breakpoints
  --interactions          Capture hover/focus/active states
  --deep-interact         Auto-interact pass (scroll, menus, modals, accordions, hover CTAs)
  --full                  Enable all captures (implies --deep-interact)
  --cookie <cookies...>   Cookies for authenticated pages (name=value)
  --cookie-file <path>    Load cookies from JSON / storageState / Netscape cookies.txt
  --header <headers...>   Custom headers (name:value)
  --user-agent <ua>       Override the browser User-Agent string
  --insecure              Ignore HTTPS/SSL certificate errors (self-signed, dev, proxies)
  --selector <css>        Only extract from elements matching this CSS selector (e.g. ".pricing-card")
  --system-chrome         Use the system Chrome install instead of the bundled Chromium (skips 150MB download)
  --json                  Print full extraction as JSON to stdout (for piping into other tools)
  --framework <type>      Only generate specific theme (react, shadcn)
  --platforms <csv>       Additional platforms: web,ios,android,flutter,wordpress,all (additive)
  --emit-agent-rules      Emit Cursor / Claude Code / CLAUDE.md / agents.md rule files
  --tokens-legacy         Emit pre-v7 flat design-tokens.json shape (backward compat)
  --no-history            Skip saving to history
  --verbose               Detailed progress output

Commands:
  apply <url>                       Extract and apply design directly to your project
  clone <url>                       Generate a working Next.js starter from extracted design
  score <url>                       Rate design quality (7 categories, A-F, bar chart)
  grade <url>                       Generate a shareable HTML Design Report Card (--format html|md|json|svg|all, --badge, --open)
  battle <urlA> <urlB>              Head-to-head graded battle card (--format html|md|json|all, --open)
  remix <url>                       Restyle in another vocabulary (--as brutalist|swiss|art-deco|cyberpunk|soft-ui|editorial, --all, --list, --open)
  pack <url>                        Bundle every output into one design-system directory (--with-clone, --open)
  theme-swap <url> --primary <hex>  Recolour around a new brand primary (--from, --format html|md|json|tokens|all, --open)
  brand <url>                       Generate a full editorial brand-guidelines book (--format html|md|json|all, --open)
  pair <urlA> <urlB>                Fuse two designs across 7 axes (--colors-from, --typography-from, --spacing-from, --shape-from, --motion-from, --voice-from, --components-from, --brand)
  watch <url>                       Monitor for design changes on interval
  diff <urlA> <urlB>                Compare two sites' design languages
  brands <urls...>                  Multi-brand comparison matrix
  sync <url>                        Sync local tokens with live site
  history <url>                     View design change history
  mcp                               Launch stdio MCP server (--output-dir <dir>)
  lint <file>                       (v9) Audit a local token file (.json/.css) — CI-ready
  drift <url> --tokens <file>       (v9) Check local tokens for drift against a live site
  visual-diff <before> <after>      (v9) Side-by-side HTML diff of two URLs

Example output

designlang https://vercel.com --full →

Colors: 27 · Fonts: Geist + Geist Mono · Spacing: 18 (base 2px)
Shadows: 11 · Radii: 10 · CSS vars: 407 · Layout: 55 grids / 492 flex
Responsive: 4 viewports, 3 breakpoint changes · Interactions: 8 transitions
A11y: 94% WCAG · Score: 68/100 (D) · 4 issues

→ 17 files written to ./design-extract-output/
→ Run `designlang grade https://vercel.com` for a shareable report card

How it works

• Crawl — Headless Chromium via Playwright, waits for network idle and fonts
• Extract — One page.evaluate() walks up to 5,000 DOM elements, collecting 25+ computed properties, inline SVGs, font sources, and image metadata
• Process — 17 extractor modules parse, deduplicate, cluster, and classify the raw data
• Format — 12+ formatter modules emit the output files
• Score — Accessibility extractor calculates WCAG contrast ratios for all color pairs
• Capture — Optional: screenshots, responsive viewport crawling, interaction state recording

Install Everywhere

designlang ships surfaces beyond the CLI:

Surface	Path	Description
CLI	npx designlang <url>	Main entry point.
VS Code extension	vscode-extension/	"Extract design from URL" command + auto-inject into workspace.
Raycast extension	raycast-extension/	Extract, score, and "copy CLI command" from Raycast.
Figma plugin	figma-plugin/	Paste a URL inside Figma, get a full Variables collection.
GitHub Action	github-action/	"Design regression guard" — diffs tokens on every PR and comments.
Chrome extension	chrome-extension/	One-click handoff from any tab (MV3, activeTab only).
MCP server	npx designlang mcp	Exposes the extracted design as MCP resources + tools for Cursor, Claude Code, Windsurf, etc. See docs/MCP-REGISTRY.md.
Claude Code plugin	.claude-plugin/	Five slash commands inside Claude Code — /extract, /grade, /battle, /remix, /pack.

Claude Code plugin

Drop designlang straight into Claude Code as a plugin. Every CLI command becomes a slash command:

/plugin install Manavarya09/design-extract

Then inside any Claude Code session:

Slash command	What it does
/extract <url>	Full extraction → DTCG tokens, Tailwind, Figma vars, motion, voice
/grade <url>	Shareable HTML "Design Report Card" (+ --badge for an SVG)
/battle <urlA> <urlB>	Head-to-head graded battle card
/remix <url> --as <vocab>	Restyle in brutalist / swiss / art-deco / cyberpunk / soft-ui / editorial
/pack <url>	Bundle every output into one design-system directory

Manifest: .claude-plugin/plugin.json · marketplace: .claude-plugin/marketplace.json · commands: commands/ · skills: skills/.

Agent skill (other ecosystems)

Works with Cursor, Codex, and 40+ AI coding agents via the skills ecosystem:

npx skills add Manavarya09/design-extract

In Cursor / Codex / etc., use /extract-design <url>.

Website

https://designlang.manavaryasingh.com — the brutalist product page.

Contributing

See CONTRIBUTING.md. PRs welcome!

License

MIT - Manav Arya Singh