This handles the tedious parts of international SEO: validating existing hreflang implementations and generating correct tags for multi-language sites. It catches the critical mistakes that kill hreflang (missing self-references, broken return tags, invalid language codes like "eng" instead of "en"), and supports all three implementation methods (HTML link tags, HTTP headers, XML sitemaps). You get validation reports that show exactly what's broken and why, plus it generates the actual code you need. Most useful when you're dealing with cross-domain sites or have more than a handful of language variants where manual tracking becomes error-prone. The validation checks are comprehensive enough to catch the subtle issues Google actually cares about.
npx skills add https://github.com/agricidaniel/claude-seo --skill seo-hreflang