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build-website

Design and implement accessible, responsive HTML/CSS/JS websites with mobile-first layouts.

1|4|Updated Feb 20, 2026
Search Tags:#performance#accessibility#frontend#website#responsive-design#semantic-html
One-click install
npx skills add https://github.com/The-Interdependency/a0 --skill build-website
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: build-website
Source: https://github.com/The-Interdependency/a0/tree/main/.agents/skills/build-website
Command: npx skills add https://github.com/The-Interdependency/a0 --skill build-website

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Create compelling public-facing websites that are usable, accessible, and performant for real users, reducing friction and increasing engagement.

Core Features & Use Cases

  • Mobile-first design with semantic HTML and accessible navigation
  • Responsive layout, color contrast, and keyboard operability to ensure WCAG AA compliance
  • Use cases include landing pages, app UIs, public portals, and marketing pages with consistent UX

Quick Start

Outline the structure and accessibility plan for a sample homepage.

Frequently Asked Questions about build-website

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build an accessible website with semantic HTML and keyboard navigation?▼

To build an accessible website, use semantic HTML elements for structure and ensure all interactive features are operable via keyboard navigation. This approach guarantees WCAG AA compliance for color contrast and reliable user interactions across public-facing pages.

What is mobile-first responsive design and how does it improve frontend performance?▼

Mobile-first responsive design starts styling for small screens and scales up, ensuring layouts adapt to any device. Applying non-blocking performance optimization alongside this approach reduces friction and increases user engagement on fast, accessible websites.

Can I use this approach for building app UIs and marketing landing pages?▼

Yes, this approach applies to creating app UIs, landing pages, public portals, and marketing pages. It ensures consistent UX across all HTML, CSS, and JS interfaces by satisfying requirements for mobile-first design and accessible navigation.

How do I ensure reliable states for data views in a responsive web layout?▼

Reliable states for data views are ensured by implementing consistent UX patterns and accessible navigation within your responsive layout. Using semantic HTML and keyboard operability maintains stable data presentation across different user interactions and device sizes.

What's the best way to structure a frontend website for WCAG AA color contrast compliance?▼

The best way to structure a frontend website for WCAG AA compliance is to plan color contrast during the initial mobile-first design phase. Integrating semantic HTML and accessible navigation early ensures public-facing pages remain usable for real users.

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