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