Notifications and delivery
Define typed notifications, resolve recipient preferences, deliver across explicit channels, and retain one provider-independent history of every send.
Firebase Cloud Messaging
An FCM delivery seam with explicit provider transport and target lifecycle.
Supported features
Package reference
Compose @playstack/delivery/fcm with an application-owned sender and encrypted device targets. Supply credentials and response normalization; retain product scheduling, recipient revalidation and invalid-token handling.
Delivery acceptance does not prove background execution or message receipt. Data-only hints and visible notifications have different platform policies; keep documents and secrets out of both.
