designlang

<p align="center"> <img src="https://raw.githubusercontent.com/Manavarya09/design-extract/main/website/public/logo-specimen.svg" alt="designlang — reads a website the way a developer reads a stylesheet" width="900"> </p>

<p align="center"> <a href="https://www.npmjs.com/package/designlang"><img src="https://img.shields.io/npm/v/designlang?color=0A0908&labelColor=F3F1EA&label=npm" alt="npm version"></a> <a href="https://github.com/Manavarya09/design-extract/blob/main/LICENSE"><img src="https://img.shields.io/github/license/Manavarya09/design-extract?color=0A0908&labelColor=F3F1EA" alt="license"></a> <a href="https://nodejs.org"><img src="https://img.shields.io/node/v/designlang?color=0A0908&labelColor=F3F1EA" alt="node version"></a> <a href="https://designlang.manavaryasingh.com/"><img src="https://img.shields.io/badge/website-live-FF4800?labelColor=F3F1EA" alt="website"></a>

</p>

<p align="center"> <img src="https://raw.githubusercontent.com/Manavarya09/design-extract/main/designlang.png" alt="designlang in action — extracts DTCG tokens, Tailwind config, Figma variables, brand book PDF" width="100%"> </p>


Sponsors

<p align="center"> <a href="https://www.atlascloud.ai/?utm_source=github&utm_medium=referral&utm_campaign=design-extract"> <img src="./assets/atlas-cloud-logo.svg" alt="Atlas Cloud" width="220"> </a> &nbsp;&nbsp;&nbsp;&nbsp; <a href="https://bloome.im/agent/join/XP8NQwFj?ref=9ZZRRy82"> <img src="./assets/bloome.png" alt="Bloome" width="360"> </a> </p>

<p align="center"> <strong><a href="https://www.atlascloud.ai/?utm_source=github&utm_medium=referral&utm_campaign=design-extract">Atlas Cloud</a></strong> — powers OpenAI-compatible <code>--smart</code> classification. For AI coding workflows, try the <a href="https://www.atlascloud.ai/console/coding-plan?utm_source=github&utm_medium=referral&utm_campaign=design-extract">Atlas Cloud coding plan</a>. <br> <strong><a href="https://bloome.im/agent/join/XP8NQwFj?ref=9ZZRRy82">Bloome</a></strong> — deploys your AI clone to handle every audience conversation, running in the cloud, 24/7. <br> Try designlang on <a href="https://bloome.im/agent/join/XP8NQwFj?ref=9ZZRRy82">Bloome</a>. </p>

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 site stripe.com                         # whole-site: one canonical system + consistency grade ← v12.23
npx designlang studio                                  # live token editor: edit, preview, export, share ← v12.19
npx designlang verify stripe.com                       # fidelity score: rebuild from tokens vs live ← v12.18
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)

Whole-site design system (site)

Most extractors read a single URL. designlang site crawls a site's canonical pages (home, pricing, docs, blog, about, product…) and synthesizes one de-duplicated system. Every token is elected by coverage — the share of pages that use it — so what's genuinely site-wide is separated from one-off, page-local choices. Near-identical colours are merged in OKLab. It's fully deterministic and free; no API key.

npx designlang site stripe.com --max-pages 8

You get, alongside the standard pack emitted from the canonical system:

Install

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

Use in Claude Code (plugin)

designlang ships as a Claude Code plugin — eleven slash commands that wrap the CLI. Install it from inside Claude Code:

/plugin marketplace add Manavarya09/design-extract
/plugin install designlang@designlang

The first command registers this repo as a plugin marketplace; the second installs the designlang plugin from it. Restart Claude Code if prompted, then the commands are available:

Prefer the raw MCP tools? The CLI also ships an MCP server — run

designlang mcp --output-dir ./design-extract-output to serve the latest

extraction's tokens to any MCP client.

Atlas Cloud for --smart

designlang --smart can now use Atlas Cloud through its OpenAI-compatible chat API, so low-confidence classifiers can stay zero-dependency while routing to Atlas-hosted models.

export ATLASCLOUD_API_KEY="<atlascloud-api-key>"
export ATLASCLOUD_MODEL="deepseek-ai/deepseek-v4-pro"

npx designlang https://stripe.com --smart

• •Atlas Cloud envs: ATLASCLOUD_API_KEY, ATLASCLOUD_MODEL, optional ATLASCLOUD_API_BASE
• •Alias envs also work: ATLAS_CLOUD_API_KEY, ATLAS_CLOUD_MODEL, ATLAS_CLOUD_API_BASE
• •Existing OPENAI_API_KEY and ANTHROPIC_API_KEY flows keep working unchanged

What you get

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

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).
• •Runtime motion (`--motion-runtime`) — drives the page (load / scroll / hover / focus) and reads document.getAnimations() to capture what actually animates: real durations, choreography/stagger sequences, and scroll recipes (parallax / reveal / pin). Folded into *-motion-tokens.json and previewable live in the studio's Motion tab.
• •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

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)
  --motion-runtime        Capture runtime motion via getAnimations() (durations, choreography, scroll recipes)
  --full                  Enable all captures (implies --deep-interact + --motion-runtime)
  --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

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

Install Everywhere

designlang ships surfaces beyond the CLI:

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:

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>.

Contributing

See CONTRIBUTING.md. PRs welcome!

License

MIT - Manav Arya Singh !!