Astro Architecture Skill

Technical foundation for high-performance, accessible, translation-ready lead gen sites.

Core Rules (Non-Negotiable)

1. Astro static or hybrid only — No SPA routing, no client-side frameworks
2. TypeScript strict mode — Always enabled, no any
3. All text from i18n — No hardcoded strings in components
4. Mobile-first CSS — Base styles for mobile, md: and up for larger
5. Performance is build-time — No runtime optimization hacks
6. One source of truth — All site data in site.ts
7. Skill boundaries — Images via astro-images, SEO via astro-seo, forms via astro-forms

Forbidden (STOP)

STOP and reassess if any of these occur:

• ❌ Client-side routing framework (React Router, etc.)
• ❌ UI component library (shadcn, DaisyUI, Chakra)
• ❌ Inline business logic in <script> tags
• ❌ Hardcoded translations in components
• ❌ Images not using astro-images skill
• ❌ SEO markup not using astro-seo skill
• ❌ Missing required pages (404, Privacy Policy)
• ❌ client:load without explicit justification
• ❌ External fonts via Google Fonts API (self-host instead)
• ❌ PageSpeed score below 90

Tech Stack

Performance Targets

Browser Compatibility

Must work on:

• Chrome, Firefox, Safari, Edge, Opera, Brave
• iOS Safari (all versions), Android Chrome, Samsung Internet
• Old devices: iOS 12+, Android 7+

FAIL if site breaks on any of these.

File Structure

src/
├── config/
│   └── site.ts              # ALL site data
├── i18n/
│   ├── ui.ts                # UI strings
│   ├── en.json              # English
│   └── [lang].json          # Other languages
├── layouts/
│   ├── BaseLayout.astro     # HTML shell
│   └── LandingLayout.astro
├── pages/
│   ├── index.astro
│   ├── thank-you.astro
│   ├── privacy-policy.astro # REQUIRED
│   ├── 404.astro            # REQUIRED
│   ├── 410.astro            # REQUIRED
│   └── [lang]/              # Translated pages
│       └── index.astro
├── components/
│   ├── sections/            # From astro-ux
│   ├── ui/
│   ├── layout/
│   │   ├── Header.astro
│   │   ├── Footer.astro     # Must have business data
│   │   └── MobileMenu.astro
│   └── common/
│       └── LanguageSwitcher.astro
├── actions/                 # From astro-forms
├── lib/
│   ├── i18n.ts              # Translation helpers
│   └── gtm.ts               # GTM/GA4 helpers
├── styles/
│   └── global.css
└── assets/
    ├── fonts/               # Self-hosted fonts
    └── images/

Central Config

// src/config/site.ts
export const site = {
  name: "Business Name",
  phone: "+44 XXX XXX XXXX",
  email: "info@example.com",
  address: "123 Street, City, Postcode",
  
  colors: {
    primary: "#1C202F",
    secondary: "#E5F2FF",
    accent: "#FF6B35",
  },
  
  defaultLocale: 'en',
  locales: ['en', 'hu', 'es'] as const,
  
  gtm: {
    id: "GTM-XXXXXXX",
    cookieYesId: "XXXXXXXX",
  },
  
  social: {
    google: { rating: 4.9, count: 270 },
  },
};

References

Required (Always Read)

• pages.md — 404, 410, Privacy Policy (MUST exist)
• a11y.md — Accessibility requirements
• config.md — Config file templates

Required if Multi-Language

• i18n.md — Translation setup, hreflang

Conditional

• gtm.md — Only if GTM/GA4 tracking enabled
• fonts.md — Only if custom fonts used

Definition of Done

Architecture is complete when ALL are true:

• All pages render without JavaScript enabled
• PageSpeed ≥ 90 on both mobile and desktop
• No CLS on page load (test with throttled connection)
• All visible text comes from i18n dictionaries
• Required pages exist: 404, Privacy Policy
• Footer contains business data (name, address, phone, email)
• hreflang tags present if multi-language
• GTM fires correctly (test in GTM Preview)
• Cookie consent blocks tracking until accepted
• Site works on iOS Safari and Android Chrome
• Keyboard navigation works throughout
• Skip link present and functional