extract

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Identify reusable patterns, components, and design tokens, then extract and consolidate them into the design system for systematic reuse.

## Discover

Analyze the target area to identify extraction opportunities:

1. **Find the design system**: Locate your design system, component library, or shared UI directory (grep for "design system", "ui", "components", etc.). Understand its structure:
   - Component organization and naming conventions
   - Design token structure (if any)
   - Documentation patterns
   - Import/export conventions
   
   **CRITICAL**: If no design system exists, ask before creating one. Understand the preferred location and structure first.

2. **Identify patterns**: Look for:
   - **Repeated components**: Similar UI patterns used multiple times (buttons, cards, inputs, etc.)
   - **Hard-coded values**: Colors, spacing, typography, shadows that should be tokens
   - **Inconsistent variations**: Multiple implementations of the same concept (3 different button styles)
   - **Reusable patterns**: Layout patterns, composition patterns, interaction patterns worth systematizing

3. **Assess value**: Not everything should be extracted. Consider:
   - Is this used 3+ times, or likely to be reused?
   - Would systematizing this improve consistency?
   - Is this a general pattern or context-specific?
   - What's the maintenance cost vs benefit?

## Plan Extraction

Create a systematic extraction plan:

- **Components to extract**: Which UI elements become reusable components?
- **Tokens to create**: Which hard-coded values become design tokens?
- **Variants to support**: What variations does each component need?
- **Naming conventions**: Component names, token names, prop names that match existing patterns
- **Migration path**: How to refactor existing uses to consume the new shared versions

**IMPORTANT**: Design systems grow incrementally. Extract what's clearly reusable now, not everything that might someday be reusable.

## Extract & Enrich

Build improved, reusable versions:

- **Components**: Create well-designed components with:
  - Clear props API with sensible defaults
  - Proper variants for different use cases
  - Accessibility built in (ARIA, keyboard navigation, focus management)
  - Documentation and usage examples
  
- **Design tokens**: Create tokens with:
  - Clear naming (primitive vs semantic)
  - Proper hierarchy and organization
  - Documentation of when to use each token
  
- **Patterns**: Document patterns with:
  - When to use this pattern
  - Code examples
  - Variations and combinations

**NEVER**:
- Extract one-off, context-specific implementations without generalization
- Create components so generic they're useless
- Extract without considering existing design system conventions
- Skip proper TypeScript types or prop documentation
- Create tokens for every single value (tokens should have semantic meaning)

## Migrate

Replace existing uses with the new shared versions:

- **Find all instances**: Search for the patterns you've extracted
- **Replace systematically**: Update each use to consume the shared version
- **Test thoroughly**: Ensure visual and functional parity
- **Delete dead code**: Remove the old implementations

## Document

Update design system documentation:

- Add new components to the component library
- Document token usage and values
- Add examples and guidelines
- Update any Storybook or component catalog

Remember: A good design system is a living system. Extract patterns as they emerge, enrich them thoughtfully, and maintain them consistently.

From riverosmejia/gemini-ALL-IN-SETUP, MIT.

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