This one handles the full PWA stack: service workers, caching strategies, web app manifests, and offline support. You get patterns for all the major caching strategies (cache first, network first, stale while revalidate), complete manifest templates with shortcuts and share targets, and service worker lifecycle handling. It covers the three pillars (HTTPS, service worker, manifest) plus installability criteria. Use it when you need to make a web app work offline, add install prompts, or implement background sync. The workbox integration is there if you want to skip writing service worker boilerplate, but the vanilla patterns are solid if you prefer control over magic.
npx skills add https://github.com/alinaqi/claude-bootstrap --skill pwa-development