This one kicks in when you're building Angular components that need to live outside Angular apps, like embedding widgets in React or vanilla JS sites. It covers the createCustomElement API, input/output mapping to web component attributes, and the newer standalone elements approach for Angular 21. The examples show you the full registration flow, from creating the custom element to defining it in the browser's custom elements registry. Honestly, the micro-frontend use case is the sweet spot here. If you're just building a normal Angular app, you won't need this. But if you're packaging Angular components for distribution or building component libraries that need framework independence, it's essential.
npx skills add https://github.com/oguzhan18/angular-ecosystem-skills --skill angular-elements