Solid starting point for implementing push notifications across iOS, Android, and web with Firebase Cloud Messaging. Covers the essentials: permission requests, token management, foreground and background message handling, and platform-specific setup code for React Native, Swift, and Kotlin. The examples are straightforward and show you exactly where FCM integration fits into each platform's lifecycle. What's helpful here is seeing the token refresh handling and notification channel setup side by side, since those are easy to miss on first implementation. It won't walk you through server-side setup or advanced features like notification grouping, but it gets the client-side foundations in place quickly.
npx skills add https://github.com/secondsky/claude-skills --skill push-notification-setup