name: aico-frontend-style-extraction description: | Extract design tokens (colors, typography, spacing, effects) from reference website or screenshot to create project design system.

UNIQUE VALUE: Creates standardized design-system.md file with all design tokens extracted systematically.

Use this skill when:

• User shares reference website URL and wants to extract its style
• User provides screenshot or image and asks to "extract design", "extract style"
• Running /frontend.init and need to create design system from reference
• User asks to "create design system", "extract colors", "extract typography"
• Need to establish consistent design tokens before starting frontend work

Methods: URL (via Playwright MCP screenshot) or direct screenshot analysis Output: ALWAYS write to docs/reference/frontend/design-system.md

Style Extraction

Language Configuration

Before generating any content, check aico.json in project root for language field to determine the output language. If not set, default to English.

Process

1. Get reference material:
   • URL: Use Playwright MCP to take screenshot, then analyze
   • Screenshot: Analyze directly
   • Description: Generate tokens based on style keywords
2. Extract systematically using the checklist below
3. Save output: ALWAYS write to docs/reference/frontend/design-system.md

Extraction Checklist

Colors

• Background colors (page, card, section)
• Text colors (primary, secondary, muted)
• Accent/brand colors
• Border colors
• State colors (success, warning, error)

Typography

• Font families (headings, body, mono)
• Font sizes (scale from xs to 4xl)
• Font weights (normal, medium, semibold, bold)
• Line heights

Spacing & Layout

• Border radius values
• Container max-width
• Section padding
• Component spacing scale

Effects

• Shadows (sm, md, lg)
• Borders & dividers
• Transitions

Output Template

# Design System

## Colors

### Brand

- Primary: #xxx
- Secondary: #xxx

### Text

- Primary: #xxx
- Secondary: #xxx
- Muted: #xxx

### Background

- Page: #xxx
- Card: #xxx

## Typography

### Font Family

- Headings: "Font Name", sans-serif
- Body: "Font Name", sans-serif

### Font Size

- sm: 0.875rem
- base: 1rem
- lg: 1.125rem
- xl: 1.25rem

## Spacing

### Border Radius

- sm: 0.125rem
- md: 0.375rem
- lg: 0.5rem

## Effects

### Shadow

- sm: 0 1px 2px rgba(0,0,0,0.05)
- md: 0 4px 6px rgba(0,0,0,0.1)

Playwright MCP Usage

If user provides URL:

1. browser_navigate to URL
2. browser_take_screenshot (fullPage: true)
3. Analyze screenshot for design tokens

Key Rules

• ALWAYS extract actual hex values from reference - don't guess
• MUST note shadows, borders, transitions
• ALWAYS save to docs/reference/frontend/design-system.md

Common Mistakes

• ❌ Guess colors without checking → ✅ Extract actual hex values
• ❌ Skip subtle details → ✅ Note shadows, borders, transitions
• ❌ Ignore responsive differences → ✅ Document mobile vs desktop