Astro SEO Audits and improves the SEO setup of an Astro site against the full stack described in Astro SEO: the definitive guide. The skill covers nine areas — technical foundation, structured data, content, site structure, performance, sitemaps and indexing, agent discovery, redirects, and analytics — and produces drop-in code for anything missing or weak. The opinionated spine of this skill is . Most of the fixes route through it. If the project doesn't use it yet, installing it is the first recommendation. Code recipes live in — read it when you need to implement a specific fix. This file…