WWDC fallout: SiriKit is formally deprecated — start your App Intents migration now

A second-day developer detail that wasn't in the keynote-level coverage: Apple gave SiriKit a formal deprecation notice and made the expanded App Intents framework the only way an app can integrate with the new Gemini-powered Siri.

Apps still using the older INExtension/intent classes keep compiling under iOS 27 but throw deprecation warnings and — critically — won't surface in the rebuilt Siri at all, since it routes exclusively through App Intents. The removal window is roughly 2–3 years (about macOS 29 / fall 2028), but the functional cutoff is now: any app relying on SiriKit voice features is already invisible to the new assistant.

If you own an iOS/macOS app with Siri or Shortcuts integration, schedule the App Intents port this cycle rather than treating it as deprecated-but-fine.

Sources: Tech Times: App Intents replaces SiriKit, Apple: Migrating from SiriKit Intents to App Intents