---
title: "Code-along: Make your app available to Siri"
description: "Code along with a SwiftUI calendar app that adopts App Schemas, Spotlight donations, onscreen awareness, and App Intents so Siri can understand and manage events."
shoutout: "Unofficial, made with love by Superwall - the best way to monetize your apps."
category: "AI & Machine Learning"
---

# Code-along: Make your app available to Siri


[Watch on Apple Developer](https://developer.apple.com/videos/play/wwdc2026/344/)

Code along with a SwiftUI calendar app that adopts App Schemas, Spotlight donations, onscreen awareness, and App Intents so Siri can understand and manage events.

## TL;DR

- Adopt App Schemas from the App Intents Calendar domain to model calendars, attendees, and events in terms Siri already understands, without custom training phrases or app-side NLP.
- Use IndexedEntity plus Spotlight donations for persistent content such as calendars and events; use TransientAppEntity for content like event attendees that is only meaningful through a parent entity.
- Connect Siri and Spotlight results to in-app navigation with a system.open intent, and provide onscreen awareness with .appEntityIdentifier and .userActivity using EntityIdentifier.
- Implement schematized create, update, and delete event intents so Siri can clarify, confirm, disambiguate, and perform calendar actions, including optional-parameter clearing via IntentParameter.valueState.

## Goal and architecture

The session turns CometCal, a SwiftUI calendar sample app backed by SwiftData, into an app Siri can understand and operate through Apple Intelligence. The integration path is App Intents plus App Schemas: schemas describe the app's entities, intent parameters, and outputs using concepts Siri already knows.

The Calendar App Schema Domain supplies schemas for calendars, events, attendees, and calendar actions. The app does not implement custom natural-language parsing or training phrases; it exposes structured content and actions, and Siri handles language understanding, clarification, confirmation, and disambiguation.

- Primary content goals: expose calendars, events, notes, attendees, locations, recurrence, and related event metadata.
- Primary action goals: create, update, open, and delete events from Siri and Spotlight-driven experiences.
- The CometCal sample is the reference implementation for following the code-along.

## Model app content with schematized entities

The first implementation step is to create AppEntity types from Calendar-domain snippets in Xcode. CalendarEntity uses the calendar_calendar schema, maps its identifier to the app model's UUID, and conforms to IndexedEntity so it can be donated to the Spotlight semantic index.

The entity query uses @Dependency to access the app's CalendarManager instead of constructing a new data layer object. Because CalendarManager is main-actor isolated, the query is marked @MainActor. EntityQuery resolves known IDs; EnumerableEntityQuery exposes all calendars so Siri can offer them as choices when an action needs a calendar parameter.

AttendeeEntity uses the calendar_attendee schema but conforms to TransientAppEntity rather than IndexedEntity. In CometCal, an attendee represents a person's participation in one event, not a standalone person record, so it has no independent identifier, query, or Spotlight index entry.

- Use DisplayRepresentation to control how entities appear in Siri and Spotlight, such as a calendar title and system calendar image.
- Use IntentPerson for attendee person/contact information that may be shared across app actions, such as composing mail.
- Use schematized @AppEnum types for attendee status and attendee type, mapping existing app terminology to the schema's cases.

### CalendarEntity implementation pattern

The session emphasizes the required decisions rather than a standalone pasted listing: match the app model ID, provide query access through the app data layer, and make calendars enumerable for Siri parameter selection.

```text
// Schematized from the Calendar domain's calendar_calendar snippet
// Key choices shown in the session:
// - @AppEntity
// - id type: UUID
// - conform to IndexedEntity
// - query uses @Dependency CalendarManager
// - query is @MainActor
// - also conform to EnumerableEntityQuery for allEntities()
```

### AttendeeEntity implementation pattern

Attendees are intentionally transient because they are only accessed through their event and should not create duplicate standalone Spotlight results.

```text
// Schematized from calendar_attendee
// Conform to TransientAppEntity, not IndexedEntity
// Use IntentPerson for the person/contact data
// Add schema enums such as calendar_attendeeStatus and calendar_attendeeType
```

## Donate indexed entities to Spotlight

Conforming to IndexedEntity defines the shape of indexable content, but it does not index anything by itself. Persistent entities need to be donated whenever they are created or updated, and removed from the index when deleted.

CometCal keeps a CSSearchableIndex instance in CalendarManager, initialized with a unique name for the app. Calendar creation and update paths call indexAppEntities, while delete paths call deleteAppEntities with the entity ID and type. Once donated, Spotlight and Siri can resolve content by name, property, and semantic context.

- Donate CalendarEntity instances when calendars are created or updated.
- Delete calendar index entries when calendars are removed.
- Apply the same IndexedEntity and donation pattern to EventEntity so Siri can answer questions from event titles and notes.

### Spotlight donation lifecycle

The exact sample code lives in CometCal, but the workflow is explicit: update the Spotlight semantic index in the same data-layer operations that mutate indexed entities.

```text
// In the app's data layer after create/update:
// searchableIndex.indexAppEntities(...)

// In the delete path:
// searchableIndex.deleteAppEntities(..., type: CalendarEntity.self)
```

## Build EventEntity and connect it to navigation and context

EventEntity is the central indexed entity in the sample. It uses the calendar_event schema and composes the previously defined CalendarEntity and AttendeeEntity, allowing Siri to understand relationships such as which calendar an event belongs to and who is attending.

The event schema includes required and optional properties. CometCal wires essentials like title and start date, leaves unsupported optional schema properties unset, and can still include app-specific properties that are not part of the schema. Recurrence is represented using Foundation's Calendar.RecurrenceRule and mapped to and from the app's simpler frequency model.

The schema also uses union values for fields such as location and alarms. Location can be represented as a GeoToolbox PlaceDescriptor or a String, and alarms can be a Duration or a Date.

- Use IndexedEntity for EventEntity so Siri can answer questions from titles, notes, locations, and other indexed event content.
- Implement an OpenEventIntent conforming to the system.open schema so tapping or asking to open an event navigates directly to its detail view.
- Add onscreen awareness: use .appEntityIdentifier on event lists and .userActivity with an EntityIdentifier on an event detail view so Siri can resolve references like "this event" or "that third event".

### OpenIntent and onscreen awareness pattern

The session shows OpenIntent for entity deep linking and two SwiftUI modifiers for binding visible UI to AppEntity identifiers.

```text
// OpenEventIntent conforms to the system.open schema
// It takes an EventEntity target
// It asks the app's NavigationManager to navigate to that event

// In SwiftUI views:
// .appEntityIdentifier(EntityIdentifier(...))
// .userActivity(... EntityIdentifier(...))
```

## Expose Siri actions with create, update, delete, and snippets

Schematized intents are added from Calendar-domain snippets such as calendar_createEvent and calendar_updateEvent. The create intent fills in schema parameter types, injects CalendarManager with @Dependency, marks perform() @MainActor, resolves schema values into the app data model, calls the data layer, and returns an EventEntity.

UpdateEventIntent follows the same pattern but most parameters are optional because a user may change only one field. The important distinction is IntentParameter.valueState: .set with a value means change the field, .set with nil means explicitly clear it, and .unset means leave it unchanged.

DeleteEventIntent is the simplest action: it takes the target event and an optional span for recurring events, then deletes through the data layer. Siri handles confirmation before removal and disambiguates when more than one event matches. Result cards can be customized by adding ShowsSnippetView to an intent's return type and returning a lightweight SwiftUI snippet view.

- CreateEventIntent resolves fields such as title, date/time, calendar, location union values, and recurrence before creating the model object.
- UpdateEventIntent must not treat nil alone as "no change"; use valueState for optional fields where clearing is meaningful.
- DeleteEventIntent relies on Siri's built-in confirmation and disambiguation behavior for destructive actions.
- Custom snippet views let the app replace Siri's default result card while keeping the view simple and lightweight.

### Optional update parameter handling

This is the key update-intent subtlety from the session, especially for recurrence and other optional fields where removal is a valid request.

```text
// For optional update parameters:
// .set(value)  -> apply the new value
// .set(nil)    -> explicitly clear the value
// .unset       -> leave the existing value unchanged
```

### Custom Siri result snippet pattern

Snippet views replace the default Siri card with a custom SwiftUI result view, such as CometCal's event card with its app-specific visual style.

```text
// In an intent returning a result:
// add ShowsSnippetView to the return type
// return the updated EventEntity with EventSnippetView(entity)
```

## Resources

- [Integrating your calendar app with Apple Intelligence](https://developer.apple.com/documentation/AppIntents/integrating-your-calendar-app-with-apple-intelligence)
- [Donating your app's data and actions to the system](https://developer.apple.com/documentation/AppIntents/donating-your-apps-data-and-actions-to-the-system)
- [Donations and discovery](https://developer.apple.com/documentation/AppIntents/donations-and-discovery)
- [Making app entities available in Spotlight](https://developer.apple.com/documentation/AppIntents/making-app-entities-available-in-spotlight)
- [Making actions and content discoverable by Apple Intelligence](https://developer.apple.com/documentation/AppIntents/making-actions-and-content-discoverable-by-apple-intelligence)
- [Providing contextual cues to Apple Intelligence and Siri](https://developer.apple.com/documentation/AppIntents/providing-contextual-cues-to-apple-intelligence-and-siri)
- [Apple Intelligence and Siri AI](https://developer.apple.com/documentation/AppIntents/apple-intelligence-and-siri-ai)
- [Calendar](https://developer.apple.com/documentation/AppIntents/app-schema-domain-calendar)
- [App schema domains](https://developer.apple.com/documentation/AppIntents/app-schema-domains)

## Related Sessions

- [Build intelligent Siri experiences with App Schemas](https://wwdc.ai/2026/240)
- [Explore advanced App Intents features for Siri and Apple Intelligence](https://wwdc.ai/2026/343)

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