Adds, repairs and verifies schema.org structured data (JSON-LD) on a website, and says honestly which Google rich results the markup can still earn. Use when a user asks to "add schema markup", "add structured data", "write JSON-LD for this page", "fix structured data errors in Search Console", "why are my star ratings / FAQ rich results gone", or wants Product, Article, Organization, LocalBusiness, Breadcrumb, Event, Video or SoftwareApplication markup. Covers choosing types per page, required properties, wiring into Next.js, static sites and CMSs, and checking the result from the command line.
