Web Design Builder

Create professional, accessible HTML5/JavaScript web designs with automatic Playwright verification.

Overview

This skill generates complete, production-ready web designs from specifications, with automatic accessibility and functionality testing using Playwright MCP integration.

Key Features

• Complete Design Generation: HTML5, CSS3, JavaScript from specifications
• Automatic Verification: Playwright MCP integration for testing (when available)
• Accessibility First: WCAG 2.1 Level AA compliance built-in
• Responsive Design: Mobile-first, tested across breakpoints
• Modern Frameworks: Vanilla, Tailwind CSS, React, Vue, Alpine.js support
• Interactive Testing: Keyboard navigation, form validation, component functionality
• Visual Verification: Screenshots at multiple breakpoints
• Performance Optimization: Load time analysis, resource optimization

When to Use

• Create landing pages, websites, or web applications
• Build responsive web interfaces from specifications
• Generate design mockups or prototypes
• Refactor existing HTML/CSS/JavaScript code
• Create accessible, WCAG-compliant designs
• Build component libraries or design systems

Playwright MCP Integration

Automatic Detection

The skill automatically detects if Playwright MCP is installed. If not available:

• User is informed before starting
• Verification steps are skipped
• Manual testing guidance is provided
• Installation instructions are offered

When Playwright MCP is Available

Automatic verification includes:

1. Accessibility Testing

   • WCAG compliance checking
   • Color contrast verification
   • Keyboard navigation testing
   • Screen reader compatibility

2. Visual Testing

   • Screenshots at mobile (375px), tablet (768px), desktop (1440px)
   • Full-page captures
   • Responsive layout verification

3. Functionality Testing

   • Form validation
   • Interactive components
   • JavaScript functionality
   • Error handling

4. Performance Analysis

   • Load time measurement
   • Resource size analysis
   • Optimization recommendations

Workflow

Phase 1: Requirements Gathering

• Design scope and type
• Target audience and use case
• Technical preferences (framework, browser support)
• Accessibility requirements
• Check Playwright MCP availability

Phase 2: Design Generation

• Create semantic HTML5 structure
• Responsive CSS with mobile-first approach
• Accessible JavaScript with progressive enhancement
• Save to file

Phase 3: Verification (if Playwright MCP available)

• Launch browser and load design
• Run accessibility tests
• Capture responsive screenshots
• Test interactive functionality
• Analyze performance

Phase 4: Verification Report

• Comprehensive accessibility compliance report
• Visual testing results
• Functionality test outcomes
• Performance metrics
• Prioritized recommendations

Phase 5: Iteration

• Fix critical issues
• Apply improvements
• Re-verify
• Deliver final design

Supported Frameworks

Vanilla HTML/CSS/JS

• No dependencies
• Simple and fast
• Best for: Static sites, simple interactions

Tailwind CSS

• Utility-first CSS
• Rapid development
• Best for: Prototypes, modern interfaces

React

• Component-based
• Virtual DOM
• Best for: Complex SPAs, interactive apps

Vue

• Progressive framework
• Easy to learn
• Best for: Medium complexity apps

Alpine.js

• Lightweight (15KB)
• Declarative syntax
• Best for: Progressive enhancement

Installation

/plugin marketplace add rknall/claude-skills
/plugin install web-design-builder

Example Usage

Basic Landing Page

Create a landing page for a SaaS product with:
- Hero section with CTA
- Features grid (3 columns)
- Pricing table
- Contact form

Use Tailwind CSS and make it fully accessible.

Dashboard Interface

Build an admin dashboard with:
- Sidebar navigation
- Top header with user menu
- Stats cards
- Data table
- Charts

Responsive design, dark mode support.

Contact Form

Create an accessible contact form with:
- Name, email, message fields
- Real-time validation
- Success/error states
- WCAG AA compliant

Include keyboard navigation support.

Installing Playwright MCP

If Playwright MCP is not installed:

# Install Playwright MCP server
npm install -g @playwright/mcp-server

# Configure in Claude Code
claude code mcp add playwright

# Restart Claude Code

Design Templates

The skill includes templates for:

• SaaS Landing Pages
• Contact Forms
• Admin Dashboards
• Product Pages
• Portfolio Sites

See design-templates.md for complete examples.

Accessibility Features

All designs include:

• ✅ Semantic HTML5 elements
• ✅ ARIA landmarks and labels
• ✅ Keyboard navigation support
• ✅ Focus indicators (3:1 contrast)
• ✅ Color contrast compliance (4.5:1 minimum)
• ✅ Skip links
• ✅ Screen reader friendly
• ✅ Responsive and zoomable
• ✅ Form labels and validation
• ✅ Alt text for images

Deliverables

• Complete HTML/CSS/JavaScript files
• Verification report (if MCP available)
• Screenshots at multiple breakpoints
• Usage documentation
• Customization guide
• Deployment instructions

Version History

• 1.0.0 (2025-10-18): Initial release
  • Playwright MCP integration
  • Multiple framework support
  • Accessibility-first approach
  • Comprehensive verification

License

This skill is provided as-is for use with Claude Code.