React Native Notifications

Priority: P1 (OPERATIONAL)

Guidelines

• Library: Choose @react-native-firebase/messaging (Bare) or expo-notifications (Managed).
• Setup: Configure Platform channels (Android) and APNs (iOS).
• Lifecycle: Handle Foreground (onMessage), Background (onNotificationOpenedApp), and Quit (getInitialNotification) states.
• Permissions: Prime users before requesting system authorization.

See implementation examples for complete FCM handler setup with permission request and lifecycle handlers.

Anti-Patterns

• No Unconditional Requests: Spamming permission dialogs leads to high denial rates.
• No Missing Handlers: Forgetting "Quit" state handling results in lost deep links.
• No Unvalidated Data: Blindly trusting payload data causes runtime crashes.