| name | astro-seo |
| description | SEO for Astro sites — meta tags, Open Graph, Twitter Cards, JSON-LD structured data, sitemap, RSS, robots.txt, canonical URLs, hreflang, Core Web Vitals. Use when optimizing search engine visibility or social sharing. |
Astro SEO
Targets: Astro 7.
Complete SEO strategy for Astro 7 sites — zero JS by default makes Astro naturally SEO-friendly.
Agent Workflow (MANDATORY)
Before ANY implementation, spawn 3 parallel agents (Codex spawn_agent):
- explore-codebase - Analyze existing layouts, head components, and metadata
- research-expert - Verify latest SEO best practices via Context7/Exa
- Context7 (official docs) - Check Astro 7 sitemap/RSS integration docs
After implementation, run sniper for validation.
Overview
When to Use
- Adding meta tags and Open Graph to any Astro page
- Generating JSON-LD structured data for rich snippets
- Setting up @astrojs/sitemap for search indexing
- Configuring RSS feeds with @astrojs/rss
- Creating robots.txt and canonical URL patterns
- Adding hreflang for multilingual SEO
- Measuring and improving Core Web Vitals
Why Astro for SEO
| Feature | Benefit |
|---|
| Zero JS by default | Pure HTML for crawlers, instant indexing |
| Static output | Sub-second TTFB, top Core Web Vitals |
Astro.site | Canonical URL construction built-in |
| Islands Architecture | Only hydrate interactive parts |
Core Concepts
Head Component Pattern
Create a reusable <SEO /> or <Head /> component accepting title, description, og, canonical props. Place in all layouts. Use Astro.site for absolute URL construction.
Canonical URLs
Always construct canonicals with Astro.site:
const canonical = new URL(Astro.url.pathname, Astro.site);
Structured Data
Inject JSON-LD via <script type="application/ld+json" set:html={JSON.stringify(schema)} />. Use set:html to avoid XSS — never template string interpolation.
Reference Guide
Concepts
Templates
Best Practices
- One Head component - Centralize all meta in a reusable component
- Absolute URLs - Use
Astro.site for og:image and canonicals
set:html for JSON-LD - Prevents XSS vulnerabilities- sitemap + robots.txt - Always configure both for crawlability
- hreflang on all locales - Include x-default for language variants
