Pre-launch audit.
Full URL inventory from Google Search Console and the current sitemap. Top-100 keyword ranking export per page. On-page audit (title, description, H1, canonical, schema). Core Web Vitals baseline (LCP, CLS, INP). Backlink inventory via Moz or Ahrefs. Output: a written "pages that must not break" list with exact title/meta/H1 lock, and a 301 redirect map for every URL that changes.