--- name: "ui-design-system" description: UI design system toolkit for Senior UI Designer including design token generation, component documentation, responsive design calculations, and developer handoff tools. Use for creating design systems, maintaining visual consistency, and facilitating design-dev collaboration. ---

UI Design System

Generate design tokens, create color palettes, calculate typography scales, build component systems, and prepare developer handoff documentation.

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Table of Contents

• Trigger Terms
• Workflows

- Workflow 1: Generate Design Tokens - Workflow 2: Create Component System - Workflow 3: Responsive Design - Workflow 4: Developer Handoff

• Tool Reference
• Quick Reference Tables
• Knowledge Base

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Trigger Terms

Use this skill when you need to:

• "generate design tokens"
• "create color palette"
• "build typography scale"
• "calculate spacing system"
• "create design system"
• "generate CSS variables"
• "export SCSS tokens"
• "set up component architecture"
• "document component library"
• "calculate responsive breakpoints"
• "prepare developer handoff"
• "convert brand color to palette"
• "check WCAG contrast"
• "build 8pt grid system"

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Workflows

Workflow 1: Generate Design Tokens

Situation: You have a brand color and need a complete design token system.

Steps:

1. Identify brand color and style

- Brand primary color (hex format) - Style preference: modern | classic | playful

1. Generate tokens using script

```bash python scripts/design_token_generator.py "#0066CC" modern json ```

1. Review generated categories

- Colors: primary, secondary, neutral, semantic, surface - Typography: fontFamily, fontSize, fontWeight, lineHeight - Spacing: 8pt grid-based scale (0-64) - Borders: radius, width - Shadows: none through 2xl - Animation: duration, easing - Breakpoints: xs through 2xl

1. Export in target format

```bash # CSS custom properties python scripts/design_token_generator.py "#0066CC" modern css > design-tokens.css

# SCSS variables python scripts/design_token_generator.py "#0066CC" modern scss > _design-tokens.scss

# JSON for Figma/tooling python scripts/design_token_generator.py "#0066CC" modern json > design-tokens.json ```

1. Validate accessibility

- Check color contrast meets WCAG AA (4.5:1 normal, 3:1 large text) - Verify semantic colors have contrast colors defined

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Workflow 2: Create Component System

Situation: You need to structure a component library using design tokens.

Steps:

1. Define component hierarchy

- Atoms: Button, Input, Icon, Label, Badge - Molecules: FormField, SearchBar, Card, ListItem - Organisms: Header, Footer, DataTable, Modal - Templates: DashboardLayout, AuthLayout

1. Map tokens to components

| Component | Tokens Used | |-----------|-------------| | Button | colors, sizing, borders, shadows, typography | | Input | colors, sizing, borders, spacing | | Card | colors, borders, shadows, spacing | | Modal | colors, shadows, spacing, z-index, animation |

1. Define variant patterns

Size variants: ``` sm: height 32px, paddingX 12px, fontSize 14px md: height 40px, paddingX 16px, fontSize 16px lg: height 48px, paddingX 20px, fontSize 18px ```

Color variants: ``` primary: background primary-500, text white secondary: background neutral-100, text neutral-900 ghost: background transparent, text neutral-700 ```

1. Document component API

- Props interface with types - Variant options - State handling (hover, active, focus, disabled) - Accessibility requirements

1. Reference: See references/component-architecture.md

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Workflow 3: Responsive Design

Situation: You need breakpoints, fluid typography, or responsive spacing.

Steps:

1. Define breakpoints

| Name | Width | Target | |------|-------|--------| | xs | 0 | Small phones | | sm | 480px | Large phones | | md | 640px | Tablets | | lg | 768px | Small laptops | | xl | 1024px | Desktops | | 2xl | 1280px | Large screens |

1. Calculate fluid typography

Formula: clamp(min, preferred, max)

```css / 16px to 24px between 320px and 1200px viewport / font-size: clamp(1rem, 0.5rem + 2vw, 1.5rem); ```

Pre-calculated scales: ```css --fluid-h1: clamp(2rem, 1rem + 3.6vw, 4rem); --fluid-h2: clamp(1.75rem, 1rem + 2.3vw, 3rem); --fluid-h3: clamp(1.5rem, 1rem + 1.4vw, 2.25rem); --fluid-body: clamp(1rem, 0.95rem + 0.2vw, 1.125rem); ```

1. Set up responsive spacing

| Token | Mobile | Tablet | Desktop | |-------|--------|--------|---------| | --space-md | 12px | 16px | 16px | | --space-lg | 16px | 24px | 32px | | --space-xl | 24px | 32px | 48px | | --space-section | 48px | 80px | 120px |

1. Reference: See references/responsive-calculations.md

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Workflow 4: Developer Handoff

Situation: You need to hand off design tokens to development team.

Steps:

1. Export tokens in required formats

```bash # For CSS projects python scripts/design_token_generator.py "#0066CC" modern css

# For SCSS projects python scripts/design_token_generator.py "#0066CC" modern scss

# For JavaScript/TypeScript python scripts/design_token_generator.py "#0066CC" modern json ```

1. Prepare framework integration

React + CSS Variables: ```tsx import './design-tokens.css';

Click ```

Tailwind Config: ```javascript const tokens = require('./design-tokens.json');

module.exports = { theme: { colors: tokens.colors, fontFamily: tokens.typography.fontFamily } }; ```

styled-components: ```typescript import tokens from './design-tokens.json';

const Button = styled.button` background: ${tokens.colors.primary['500']}; padding: ${tokens.spacing['2']} ${tokens.spacing['4']}; `; ```

1. Sync with Figma

- Install Tokens Studio plugin - Import design-tokens.json - Tokens sync automatically with Figma styles

1. Handoff checklist

- [ ] Token files added to project - [ ] Build pipeline configured - [ ] Theme/CSS variables imported - [ ] Component library aligned - [ ] Documentation generated

1. Reference: See references/developer-handoff.md

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Tool Reference

design_token_generator.py

Generates complete design token system from brand color.

| Argument | Values | Default | Description | |----------|--------|---------|-------------| | brand_color | Hex color | #0066CC | Primary brand color | | style | modern, classic, playful | modern | Design style preset | | format | json, css, scss, summary | json | Output format |

Examples:

# Generate JSON tokens (default)
python scripts/design_token_generator.py "#0066CC"

# Classic style with CSS output
python scripts/design_token_generator.py "#8B4513" classic css

# Playful style summary view
python scripts/design_token_generator.py "#FF6B6B" playful summary

Output Categories:

...