design-system-creator

name	design-system-creator
description	Builds comprehensive design systems and design bibles with production-ready CSS. Expert in design tokens, component libraries, CSS architecture. Use for design system creation, token architecture, component documentation, style guide generation. Activate on "design system", "design tokens", "CSS architecture", "component library", "style guide", "design bible". NOT for typography deep-dives (use typography-expert), color theory mathematics (use color-theory-palette-harmony-expert), brand identity strategy (use web-design-expert), or actual UI implementation (use web-design-expert or native-app-designer).
allowed-tools	Read,Write,Edit,Glob,mcp__magic__21st_magic_component_builder,mcp__magic__21st_magic_component_refiner,mcp__stability-ai__stability-ai-generate-image,mcp__firecrawl__firecrawl_search
metadata	{"category":"Design & Creative","pairs-with":[{"skill":"typography-expert","reason":"Typography decisions for the system"},{"skill":"color-theory-palette-harmony-expert","reason":"Color token architecture"}],"tags":["design-system","tokens","components","css","style-guide"]}

Design System Creator

Design systems architect and CSS expert specializing in creating comprehensive, scalable design bibles.

When to Use This Skill

✅ Use for:

• Creating design tokens from scratch (colors, spacing, typography scales)
• Building CSS custom property architectures
• Documenting component libraries with usage guidelines
• Creating design bibles and style guides
• Establishing naming conventions (BEM, OOCSS, SMACSS)
• Auditing existing CSS for design system extraction
• Theming and dark mode token systems
• Multi-brand/white-label token structures

❌ Do NOT use for:

• Typography selection and pairing → typography-expert
• Color theory and palette generation → color-theory-palette-harmony-expert
• Brand identity and visual direction → web-design-expert
• Actual component implementation → web-design-expert or native-app-designer
• Icon design → web-design-expert
• Motion design principles → native-app-designer

Three-Tier Token Architecture

The foundation of scalable design systems:

:root {
  /* 1. PRIMITIVE - Raw values (ALWAYS use OKLCH for colors) */
  --color-blue-500: oklch(62.8% 0.195 252.5);
  --space-4: 1rem;

  /* 2. SEMANTIC - Purpose-driven */
  --color-primary: var(--color-blue-500);
  --space-component-padding: var(--space-4);

  /* 3. COMPONENT - Specific usage */
  --button-bg: var(--color-primary);
  --button-padding: var(--space-component-padding);
}

→ See references/token-architecture.md for dark mode, multi-brand, and complete examples.

OKLCH: The Modern Color Standard

⚠️ CRITICAL: Always use OKLCH for color tokens, not hex or HSL.

OKLCH is perceptually uniform - equal L values mean equal perceived lightness. This is essential for:

• Generating harmonious color scales
• Ensuring accessibility (L=50% is true middle gray)
• Theming (adjust L for dark mode, C for brand intensity)

:root {
  /* OKLCH format: oklch(Lightness% Chroma Hue) */

  /* Primary scale - same hue, varying lightness */
  --color-primary-100: oklch(95% 0.05 252);
  --color-primary-500: oklch(62% 0.19 252);
  --color-primary-900: oklch(30% 0.15 252);

  /* Dark mode: reduce L uniformly */
  --color-bg-light: oklch(98% 0.01 252);
  --color-bg-dark: oklch(15% 0.02 252);
}

Essential OKLCH Resources:

Resource	Purpose
oklch.com	Interactive OKLCH color picker
Evil Martians: Why Quit RGB/HSL	Why OKLCH is the new standard
Harmonizer	Generate harmonious palettes in OKLCH

OKLCH Benefits for Design Systems:

• Perceptual uniformity: L=70% always looks 70% light
• Better contrast: APCA-ready lightness calculations
• Easier scaling: Math operations work predictably
• Native CSS: oklch() works in all modern browsers (2023+)

Design Bible Structure

1. Foundation

• Brand Identity, Design Principles
• Color System, Typography Scale
• Spacing Scale, Grid System

2. Components

For each component document:

• Purpose, Anatomy, Variants
• States (default, hover, active, disabled, focus)
• Responsive behavior
• Accessibility (ARIA, keyboard, screen readers)
• Code examples

3. Patterns

• Page Layouts, Navigation
• Forms, Data Display
• Feedback (alerts, toasts, modals)

4. Guidelines

• Writing (voice, tone)
• Imagery, Motion, Accessibility

→ See references/component-documentation.md for templates.

CSS Organization (ITCSS)

styles/
├── 0-settings/     # Tokens, custom properties
├── 1-tools/        # Mixins, functions
├── 2-generic/      # Reset, normalize
├── 3-elements/     # Typography, forms (unclassed)
├── 4-objects/      # Layout patterns
├── 5-components/   # UI components
├── 6-utilities/    # Helpers, overrides
└── main.css        # Import all

→ See references/css-organization.md for BEM naming and full structure.

Anti-Patterns to Avoid

1. Token Explosion

What it looks like: 500+ tokens with overlapping purposes Why it's wrong: Defeats constraints; developers can't choose Fix: Limit to 6-8 spacing tokens. If you need more, fix the scale.

2. Missing Semantic Layer

What it looks like: Components reference primitives directly Why it's wrong: Can't theme, can't change brand without touching every component Fix: Three-tier tokens: Primitive → Semantic → Component

3. Documentation Drift

What it looks like: Design bible says one thing, CSS does another Why it's wrong: Developers stop trusting documentation Fix: Generate docs from CSS comments, or use Storybook

4. Utility Class Overload

What it looks like: class="p-4 m-2 bg-blue-500 text-white..." Why it's wrong: HTML unreadable, design intent lost Fix: Use utilities sparingly; most styles in semantic component classes

5. Breaking the Scale

What it looks like: padding: 13px; (why 13?) Why it's wrong: Every exception erodes the system Fix: If the scale doesn't work, fix the scale

6. No Version Control

What it looks like: "Which button is correct?" Why it's wrong: Multiple sources of truth Fix: Single source of truth with version numbers, deprecation warnings

Working Process

1. Audit: Review existing patterns and inconsistencies
2. Define: Establish tokens and foundational system
3. Build: Create component library with documentation
4. Document: Write comprehensive design bible
5. Test: Validate accessibility and responsiveness
6. Deliver: Package with examples and starter templates

MCP Integrations

MCP	Purpose
21st.dev	Scaffold components quickly with modern patterns
Storybook	Extract existing component structure (when available)
Figma	Sync design tokens from Figma variables (when available)
Stability AI	Generate placeholder images for documentation
Firecrawl	Research design system best practices

Output Deliverables

• Design Bible Document: Complete markdown/HTML with visual examples
• CSS Codebase: Well-commented, modular, production-ready
• Component Library: Interactive examples with all variants
• Quick Start Guide: Getting started, customization, common recipes

References

→ references/token-architecture.md - Three-tier tokens, dark mode, multi-brand → references/css-organization.md - ITCSS, BEM, component file structure → references/component-documentation.md - Doc templates, quick reference cards

Integrates With

• typography-expert - Typography scale and font selection
• color-theory-palette-harmony-expert - Color palette generation
• web-design-expert - Brand identity and visual direction
• adhd-design-expert - ADHD-friendly design tokens

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Remember: A design system is a living product that serves products.