跟随编程：让你的 App 支持 Siri

Justin Kang previews the goal: take an existing app and make it available to Siri. A picnic scenario shows Siri searching events, updating times with confirmation, texting attendees, and answering questions, all through conversation.

Apps integrate with Apple Intelligence through App Intents, and App Schemas describe content and actions in terms Siri already understands, no training phrases or NLP. Schemas are organized into domains (here, the calendar domain). Introduces the CometCal sample app and the two goals: understand content, and perform actions.

Create a schematized @AppEntity from the calendar_calendar snippet, set the id to UUID, conform to IndexedEntity, wire a @Dependency and @MainActor query (EnumerableEntityQuery with allEntities()), set a display representation, and donate to Spotlight via indexAppEntities and deleteAppEntities.

Built from calendar_attendee, but conforming to TransientAppEntity instead of IndexedEntity, attendees are accessed only through their event, so they need no identifier, query, or index. Introduces the IntentPerson type and two schematized @AppEnums (calendar_attendeeStatus, calendar_attendeeType).

The central IndexedEntity (from calendar_event), where the semantic index shines for title and note-content questions. Composes the CalendarEntity and [AttendeeEntity], handles recurrence (Calendar.RecurrenceRule), union values for location and alarms, and event status/span enums.

A small OpenEventIntent conforming to the system.open schema takes an EventEntity and tells the NavigationManager to navigate to it, so tapping an event in Spotlight or Siri opens straight to its detail view.

Two view modifiers connect the screen to entities: .appEntityIdentifier on the event list and .userActivity (with an EntityIdentifier) on the detail view, letting Siri resolve "this event" or "that third event" without naming the title.

Build CreateEventIntent from calendar_createEvent: fill in parameter types, add a @MainActor @Dependency, and in perform() resolve the schema parameters (location union value, recurrence) into the data layer and return an EventEntity. Siri handles language, clarification, and confirmation.

UpdateEventIntent (calendar_updateEvent) mostly mirrors create, but parameters are optional. The key subtlety: an IntentParameter's valueState distinguishes .set with a value (change it), .set with nil (explicitly clear it), and .unset (not part of the request).

Replace Siri's default result card by adding ShowsSnippetView to the intent's return type and returning a custom SwiftUI EventSnippetView, bringing the app's visual personality (cosmic gradient, star icon) into Siri.

DeleteEventIntent is the simplest, just the event plus an optional span for recurring events, and Siri automatically handles confirmation and disambiguation before deleting.

Download the CometCal sample, browse the App Intents documentation for all schemas and domains, write tests with AppIntentsTesting, and watch "Explore advanced App Intents features for Siri and Apple Intelligence."