Hack23 SEO Optimization Skill
🔴 AI FIRST Quality Principle
Apply the AI FIRST principle: never accept first-pass quality. Minimum 2 iterations. Read all output, improve every section. No shortcuts.
Purpose
Ensures websites are optimized for search engines following modern SEO best practices with focus on technical SEO, structured data, and multilingual support.
Meta Tags (MUST HAVE)
<title>— 50-60 characters, unique per page<meta name="description">— 150-160 characters, unique per page<link rel="canonical">— Canonical URL- Open Graph tags (og:title, og:description, og:image, og:url)
- Twitter Card tags
Structured Data (Schema.org)
- Organization, WebSite, BreadcrumbList
- NewsArticle for news content
- FAQPage for FAQ sections
- Person entities with sameAs links
Multilingual SEO (hreflang)
<link rel="alternate" hreflang="en" href="/index.html">
<link rel="alternate" hreflang="sv" href="/index_sv.html">
<link rel="alternate" hreflang="x-default" href="/index.html">
Semantic HTML for SEO
- Use
<h1>once per page - Proper heading hierarchy (h1→h2→h3)
- Semantic elements (article, nav, header, footer)
- Descriptive alt text on all images
- Descriptive anchor text
Performance Requirements
- Lighthouse Performance ≥ 90
- LCP < 2.5s, FCP < 1.5s
- WebP images with fallbacks
- Minify HTML/CSS/JavaScript
- Lazy loading for images
Sitemap & Robots
- Complete sitemap.xml with lastmod and priority
- Include hreflang alternates in sitemap
- Proper robots.txt configuration
SEO Checklist
- Unique title and description per page
- Canonical URLs specified
- Schema.org structured data
- hreflang tags for all 14 languages
- sitemap.xml complete and submitted
- Mobile-friendly responsive design
- HTTPS enforced
- No broken links