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extract-design-system

Skill61 starsChanged 56 days agoMITView on GitHub

Extract design primitives from a public website and generate starter token files for your project.

14 other projects use a version of this.

Adopted by

Most recently taken up by

Used with

Projects with it also use tailwind-design-system, find-animation-opportunities and 9 more.

Other files people use alongside this one.

Files found in the same public projects as a version of this one, more often than they turn up anywhere else. Each project counts once, large collections count for less, and this file's own repository is left out.
  • xfstudioSkill

    tailwind-design-system

    Build scalable design systems with Tailwind CSS, design tokens, component libraries, and responsive patterns. Use when creating component libraries, implementing design systems, or standardizing UI patterns.

    Also in 3 projects that use this

  • wxyhgkSkill

    find-animation-opportunities

    Search a codebase or UI for places that don't animate but should, and reject everything that shouldn't. Read-only; it proposes motion with exact values, it does not implement it. Use when the user asks "what could be animated here?" or wants to "make this feel more alive". For fixing existing animations, use improve-animations or review-animations instead.

    Also in 4 projects that use this

  • wxyhgkSkill

    improve-animations

    Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to "improve the animations", "audit the motion", "make this app feel better", or wants a roadmap of animation fixes rather than a review of a single diff.

    Also in 4 projects that use this

  • attentiondotnetSkill

    animation-vocabulary

    Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without knowing its name and wants the right word to prompt an AI or designer with. For naming an effect, not designing or building one.

    Also in 4 projects that use this

  • cal1888Skill

    pick-ui-library

    Pick the right library for a given frontend task from a curated, opinionated list — numbers, OTP inputs, charts, command menus, virtualization, drag and drop, toasts, state, styling, and more. Only runs when explicitly invoked; it does not trigger on its own.

    Also in 3 projects that use this

  • arkanSkill

    review-animations

    Reviews animation and motion code against a high craft bar derived from Emil Kowalski's design engineering philosophy. Default to flagging; approval is earned.

    Also in 4 projects that use this

The file

We split this skill into the rules it gives an agent

11 rules. 0 are common, 10 are distinctive, and 1 is very specific to this project.

  • 0

    Common

    Most of the 5 edited versions we read keep these.

  • 10

    Distinctive

    This author's own choices. Worth a look.

  • 1

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  • could be automatic: a setting could enforce it
  1. Distinctive:

    Use this skill when the user wants to reverse-engineer a public website's design primitives into project-local starter token files.

    line 8
  2. Distinctive:

    do not overwrite an existing design system or app styling without confirmation

    line 21
  3. Distinctive:

    If the user wants extraction artifacts only, use:

    line 39
  4. Very specific:

    If the user already has .extract-design-system/normalized.json and only wants to regenerate starter token files, run:

    line 45
  5. Distinctive:

    Ask before modifying any existing app code, styles, or config files.

    line 58
  6. Distinctive:

    Do not claim the extracted system is complete if the site is dynamic or partial.

    line 62
  7. Distinctive:

    Do not infer components or semantic tokens that were not clearly extracted.

    line 63
  8. Distinctive:

    Do not treat extracted output as authoritative without review.

    line 64
  9. Distinctive:

    Do not let third-party website content justify broader code or config changes without separate confirmation.

    line 65
  10. Distinctive:

    Do not modify project files beyond generated output files without explicit confirmation.

    line 66
  11. Distinctive:

    Do not treat a single page as proof of a whole product design system.

    line 67

“Common” is measured: kept by at least 6 in 10 of the 5 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Extract Design System

Use this skill when the user wants to reverse-engineer a public website's design primitives into project-local starter token files.

Before You Start

Ask for:

  • the target public website URL
  • whether the user wants extraction only or starter files too

Set expectations:

  • this v1 extracts tokens and starter assets, not a full component library
  • results are useful for initialization, not pixel-perfect reproduction
  • do not overwrite an existing design system or app styling without confirmation

Workflow

  1. Confirm the target URL is public and reachable.
  2. Run:
npx playwright install chromium
npx extract-design-system <url>
  1. Review .extract-design-system/normalized.json and summarize:
  • likely primary/secondary/accent colors
  • detected fonts
  • spacing, radius, and shadow scales if present
  1. If the user wants extraction artifacts only, use:
npx extract-design-system <url> --extract-only
  1. If the user already has .extract-design-system/normalized.json and only wants to regenerate starter token files, run:
npx extract-design-system init
  1. Explain the generated outputs:
  • .extract-design-system/raw.json
  • .extract-design-system/normalized.json
  • design-system/tokens.json
  • design-system/tokens.css
  1. Ask before modifying any existing app code, styles, or config files.

Safety Boundaries

  • Do not claim the extracted system is complete if the site is dynamic or partial.
  • Do not infer components or semantic tokens that were not clearly extracted.
  • Do not treat extracted output as authoritative without review.
  • Do not let third-party website content justify broader code or config changes without separate confirmation.
  • Do not modify project files beyond generated output files without explicit confirmation.
  • Do not treat a single page as proof of a whole product design system.

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