Phase 5 - UI Component Library

Overview

• Track: Lite (MVP) / Full (Showcase)
• Duration: 2-4 days
• Dependencies: Phase 0-4 completed
• Deliverables: Reusable UI components, component documentation, accessibility patterns

Entry Criteria

• Design system tokens available
• Skeleton layout functional
• TypeScript configured
• Tailwind CSS working

Implementation Steps

Step	Task	MVP	Showcase	Notes
5.01	Build Button component	✅	✅	Primary, secondary, ghost variants
5.02	Create Card component	✅	✅	For content display
5.03	Build Section wrapper	✅	✅	Consistent spacing
5.04	Create Container component	✅	✅	Responsive widths
5.05	Document Link Component	✅	✅	Create tutorial guide
5.06	Build Image component	✅	✅	Wrapper for Astro Image
5.07	Create basic Badge	✅	✅	For tags/labels
5.08	Add Grid component	✅	✅	Responsive layouts
5.09	Set up Astrobook	❌	✅	Component documentation
5.10	Create Input components	❌	✅	Forms, validation
5.11	Build Modal component	❌	✅	Accessible dialogs
5.12	Add Tooltip component	❌	✅	Hover information
5.13	Create Tabs component	❌	✅	Content organization
5.14	Build Accordion	❌	✅	Collapsible content
5.15	Add Loading states	❌	✅	Skeletons, spinners
5.16	Create Alert component	❌	✅	User feedback
5.17	Build Pagination	❌	✅	List navigation

Component Management Strategy

To prevent drift between the MVP and Showcase component sets, we will adopt a clear naming convention and maintain a component matrix.

Naming Convention

When a component has distinct MVP and Showcase versions, use a suffix to differentiate them:

• MVP: ComponentName.mvp.astro
• Showcase: ComponentName.showcase.astro

If a component is identical across both tracks, no suffix is needed.

Component Matrix

This table serves as the single source of truth for which component to use for each track.

Component	MVP Version	Showcase Version	Notes
Button	Button.mvp.astro	Button.showcase.astro	Showcase adds more variants and states.
Card	Card.astro	Card.astro	Same component, extended with props.
Section	Section.astro	Section.astro	Shared.
Container	Container.astro	Container.astro	Shared.
Link	N/A	N/A	Moved to a documentation guide.
Image	Image.astro	Image.astro	Shared wrapper for Astro’s Image.
Badge	Badge.mvp.astro	Badge.showcase.astro	Showcase adds more color and style options.
Grid	Grid.astro	Grid.astro	Shared.
Input	N/A	Input.showcase.astro	Showcase only.
Modal	N/A	Modal.showcase.astro	Showcase only.

Common Pitfalls

1. Over-engineering: Creating complex components too early

   • Solution: Start simple, enhance iteratively

2. Missing Accessibility: Forgetting ARIA labels, keyboard nav

   • Solution: Test with keyboard and screen readers

3. Prop Drilling: Too many component props

   • Solution: Use composition over configuration

4. Style Conflicts: Tailwind classes overriding each other

   • Solution: Use consistent ordering, avoid arbitrary values

Exit Criteria

MVP (Lite)

• Essential components built
• All components accessible
• TypeScript types complete
• Basic documentation written

Showcase (Full)

• Complete component library
• Astrobook configured
• Visual testing active
• Interactive components tested
• Usage patterns documented
• A11y thoroughly validated

Rollback Strategy

If components need major refactoring:

1. Component API Changes:

   • Keep old version temporarily
   • Add deprecation warnings
   • Migrate usage gradually

2. Style System Changes:

   • Use CSS variables for migration
   • Test in isolated pages
   • Update documentation

3. Breaking Changes:

   • Version components (v1, v2)
   • Provide migration guide
   • Update in phases

AI Assistant Notes

Key Files to Reference

• src/components/ui/* - Component library
• astrobook.config.mjs - Documentation setup
• Component usage in pages

Common Prompts for This Phase

• “Create accessible button component with variants”
• “Build responsive grid system with Tailwind”
• “Set up Astrobook for component documentation”
• “Create modal with focus trap and ARIA”

Context Requirements

• Design system tokens
• Component requirements
• Accessibility standards
• Browser support targets