This gets you the core PWA setup: service workers for offline caching, a web manifest for installability, and IndexedDB for local storage. You'd reach for this when building something that needs to work offline or install like a native app on mobile. The reference guides cover the full stack from manifest config to push notifications. The main value here is having the boilerplate and patterns ready to go instead of stitching together MDN examples. Just know that PWAs still have quirks across browsers, especially iOS, so budget time for cross-platform testing.
npx skills add https://github.com/aj-geddes/useful-ai-prompts --skill progressive-web-app