After months of showing off Siri AI inside its own apps, Apple turned it into a platform today. Apple seeded the iOS 27.3 developer betas with a Siri AI Developer Preview that lets any developer wire their app into the assistant, according to MacRumors.

The mechanics are App Intents, the framework developers already know from Siri and Shortcuts. What's new is the scope: until now, only a smaller set of apps had deep hooks into the new Siri, per 9to5Mac. Now any app can expose its content and actions, and developers can define "app skills" — recipes for combining several steps into a single request.

Apple's own example, from its developer documentation, shows what kind of assistant this is becoming: "Siri can find custom content from one app, transfer it to a specified app, and perform an action. For example, somebody might request 'Hey Siri, send my favorite sneakers to my partner in [a messaging app].' Siri finds sneakers that the person added to their favorites, understands who the partner is, finds them in Contacts, then sends the sneaker information to them using the messaging app."

The two telling details: Siri resolves intent across app boundaries — it figures out which apps to use, not just which command to run. And you often won't name the app at all: if a ride-share Live Activity is on screen, "change the ride address" just routes there. Siri is being rebuilt as an orchestration layer, not a voice with a personality.

Apple is eating its own cooking: the same expanded action set is rolling out across Mail, Safari, Files, Weather, Photos, and more — unsubscribing you from mailing lists, undoing sent emails, closing duplicate tabs, deleting untouched files.

The catch is timing. This is planting season, not harvest: the preview runs in development builds and internal TestFlight only, with App Store submissions not opening until spring 2027. And the meter is running — server-side Siri AI features carry daily usage limits today, and Apple says expanded access will cost a fee later. Developers are being asked to build on a platform whose pricing they can't see yet.

Year one of Siri AI was about whether Apple could build the assistant. Year two is about whether anyone builds on it — the skills system is Apple's answer to the agentic workflows every other model lab is racing toward.

— via MacRumors