A Summary of the WWDC25 Group Lab

Here is the code of my message extension, if that helps. I am indeed trying to write to the shared storage of the App Groups import os.log // Apple's modern, fast, privacy-safe logging system class NotificationService: UNNotificationServiceExtension { private let log = OSLog( subsystem: Bundle.main.bundleIdentifier!, category: pushnotificationsmessageextension ) var contentHandler: ((UNNotificationContent) -> Void)! // A mutable copy of the notification content — this is what we'll modify or save var bestAttemptContent: UNMutableNotificationContent? // Main entry point — called every time a push arrives with `mutable-content: 1` override func didReceive( _ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void ) { // Save the handler so we can call it later (required!) self.contentHandler = contentHandler // Make a mutable copy so we can modify title, body, attachments, etc. bestAttemptContent = request.content.mutableCopy() as? UNMutableNot

Thanks for the post. Sorry for the delay. Very interesting and great question. For alarm-like functionality, local notifications can be paired with custom sounds. The default alarm sounds available on iOS devices are proprietary. This restriction ensures that these sounds remain exclusive to and maintain their intended user experience. As of now, there is no public API that allows developers to access or directly play the built-in iOS alarm sounds in their apps using AlarmKit or any other framework within the iOS SDK. Developers looking to implement alarm functionality in their apps can provide their own audio files. This means you can bundle custom sound files with your app or allow users to select from their own music library I think as well. In summary, as far as I know now, you are currently limited to using custom audio files for alarm sounds in apps, as there is no supported way to access the default iOS alarm tones programmatically. Resources: https://developer.apple.com/documentation/alarmkit

1 - We implemented the code to upload still images. We would like to do the same for Live Photos, but we are not sure how to proceed since a Live Photo is composed of 2 resources that we would like to upload in the same job so that we keep the association between the 2 resources. I think your only option here is to process the assets as separate jobs and use the URL request to preserve the conceptual link between the assets— for example, embedding that information in the upload URL or in the URL metadata. 2 - Is there a way to synchronise the application and the extension so that the application would not process the same data or execute the same requests as the extension? For example: our application is working with tokens, and we would like to prevent those tokens from being consumed by the application and the extension at the same time. These issues are alluded to at the end of this section where it says: Important: Your extension needs a mechanism to track which assets you’ve already processed and detect