Apple opens Siri 'app skills' to all third-party developers in iOS 27.3
Apple announced that developers can now build Siri AI integrations, called 'app skills,' for any app, moving beyond the limited schemas supported in earlier Siri versions. The feature lets apps teach Siri to handle multi-step, cross-app actions and will roll out with iOS 27.3, macOS 27.3, and related updates. Apple has also used these foundational changes to add new Siri capabilities across its own apps.