App Intents Skill | Agent Skills

App Intents

Build intents that expose your app's functionality to Siri, Shortcuts, Spotlight, and Apple Intelligence. Covers the full App Intents framework from basic actions through advanced features like interactive snippets, intent modes, visual intelligence integration, and Spotlight entity indexing.

When This Skill Activates

User wants to add Siri or Shortcuts integration
User asks about App Intents, AppIntent, or AppEntity
User needs Spotlight indexing for app content
User wants to create App Shortcuts with voice phrases
User is implementing interactive snippets for Siri results
User asks about intent modes (foreground, background)
User needs visual intelligence integration via App Intents
User wants onscreen entity support for Siri/ChatGPT
User asks about Swift package support for App Intents

Decision Tree

What do you need?
|
+-- Expose an action to Siri/Shortcuts
|   +-- Simple action, no UI needed
|   |   --> Basic AppIntent (intents-basics.md)
|   +-- Needs to show UI or ask user questions
|   |   --> Intent Modes + Interactive Snippets (advanced-features.md)
|   +-- Needs a predictable voice phrase
|       --> App Shortcuts (intents-basics.md)
|
+-- Make content searchable
|   +-- In Spotlight
|   |   --> IndexedEntity + @Property (entities-spotlight.md)
|   +-- In Visual Intelligence
|   |   --> IntentValueQuery + SemanticContentDescriptor (advanced-features.md)
|   +-- As onscreen entities for Siri/ChatGPT
|       --> .userActivity() + EntityIdentifier (advanced-features.md)
|
+-- Show rich results in Siri
|   +-- Static display only
|   |   --> .result(view:) snippet (advanced-features.md)
|   +-- Interactive buttons/controls
|       --> SnippetIntent protocol (advanced-features.md)
|
+-- Present choices to the user
|   --> requestChoice(between:) (advanced-features.md)
|
+-- Share intents via Swift Package
    --> AppIntentsPackage protocol (advanced-features.md)

API Availability

| Feature | Minimum OS | Framework | |---------|-----------|-----------| | AppIntent protocol | iOS 16 / macOS 13 | AppIntents | | AppEntity protocol | iOS 16 / macOS 13 | AppIntents | | AppShortcutsProvider | iOS 16 / macOS 13 | AppIntents | | @Parameter macro | iOS 16 / macOS 13 | AppIntents | | IndexedEntity protocol | iOS 18 / macOS 15 | AppIntents | | @Property with indexingKey | iOS 18 / macOS 15 | AppIntents | | Intent Modes (supportedModes) | iOS 26 / macOS 26 | AppIntents | | requestChoice(between:) | iOS 26 / macOS 26 | AppIntents | | @ComputedProperty | iOS 26 / macOS 26 | AppIntents | | @DeferredProperty | iOS 26 / macOS 26 | AppIntents | | SnippetIntent protocol | iOS 26 / macOS 26 | AppIntents | | AppIntentsPackage protocol | iOS 26 / macOS 26 | AppIntents | | Onscreen entities (.userActivity()) | iOS 26 / macOS 26 | AppIntents | | @UnionValue | iOS 18 / macOS 15 | AppIntents |

Quick Reference

| Task | Type/API | Reference File | |------|----------|----------------| | Define an action | AppIntent protocol | intents-basics.md | | Accept parameters | @Parameter macro | intents-basics.md | | Create voice phrases | AppShortcutsProvider | intents-basics.md | | Define a data entity | AppEntity protocol | entities-spotlight.md | | Index in Spotlight | IndexedEntity protocol | entities-spotlight.md | | Mark indexable fields | @Property(indexingKey:) | entities-spotlight.md | | Run in background/foreground | supportedModes | advanced-features.md | | Continue in foreground | continueInForeground() | advanced-features.md | | Show result UI | .result(view:) | advanced-features.md | | Interactive result UI | SnippetIntent protocol | advanced-features.md | | Present choices | requestChoice(between:) | advanced-features.md | | Visual intelligence search | IntentValueQuery | advanced-features.md | | Onscreen entity association | .userActivity() modifier | advanced-features.md | | Computed/deferred properties | @ComputedProperty, @DeferredProperty | advanced-features.md | | Share via packages | AppIntentsPackage | advanced-features.md |

Process

1. Identify Integration Needs

Read the user's code or requirements to determine:

What actions should be exposed to Siri/Shortcuts
What content should be searchable in Spotlight
Whether interactive snippets are needed for Siri results
Whether the intent needs foreground UI or can run in background
Target platform and minimum OS version

2. Load Relevant Reference Files

Based on the need, read from this directory:

intents-basics.md -- AppIntent protocol, @Parameter, perform(), App Shortcuts
entities-spotlight.md -- AppEntity, IndexedEntity, Spotlight indexing, @Property
advanced-features.md -- Intent modes, interactive snippets, visual intelligence, onscreen entities, choices, packages

3. Review or Implement

Apply patterns from the reference files. Check for common mistakes (see Top Mistakes below).

4. Cross-Reference

For Visual Intelligence camera search, see apple-intelligence/visual-intelligence/
For Foundation Models on-device LLM, see apple-intelligence/foundation-models/
For deep linking from intents, see generators/deep-linking/ skill

Top Mistakes

These are the most frequent errors when implementing App Intents.

1. Missing static metadata

// ❌ Wrong -- no title or description
struct MyIntent: AppIntent {
    func perform() async throws -> some IntentResult {
        return .result()
    }
}

// ✅ Correct -- static title is required
struct MyIntent: AppIntent {
    static var title: LocalizedStringResource = "Do Something"
    static var description: IntentDescription = "Performs the action"

    func perform() async throws -> some IntentResult {
        return .result()
    }
}

2. Forgetting to index entities after changes

// ❌ Wrong -- entities updated but Spotlight not notified
func saveRecipe(_ recipe: Recipe) {
    database.save(recipe)
}

// ✅ Correct -- reindex after mutations
func saveRecipe(_ recipe: Recipe) async throws {
    database.save(recipe)
    try await CSSearchableIndex.default().indexAppEntities()
}

3. Using foreground intent for background-safe work

// ❌ Wrong -- forces app to foreground for a simple toggle
struct ToggleFavoriteIntent: AppIntent {
    static var title: LocalizedStringResource = "Toggle Favorite"
    static var openAppWhenRun = true  // Unnecessary

    func perform() async throws -> some IntentResult {
        toggleFavorite()
        return .result()
    }
}

// ✅ Correct -- runs silently in background
struct ToggleFavoriteIntent: AppIntent {
    static var title: LocalizedStringResource = "Toggle Favorite"

    var supportedModes: IntentModes { .background }

    func perform() async throws -> some IntentResult {
        toggleFavorite()
        return .result()
    }
}

4. Not providing EntityStringQuery for entities

// ❌ Wrong -- entity has no way to be queried
struct NoteEntity: AppEntity {
    var id: String
    var title: String
    // Missing: static var defaultQuery
}

// ✅ Correct -- provides a query so Siri can resolve entities
struct NoteEntity: AppEntity {
    var id: String
    var title: String

    static var defaultQuery = NoteEntityQuery()
    // ... typeDisplayRepresentation, displayRepresentation
}

5. Returning too many Spotlight results

// ❌ Wrong -- indexing thousands of items at once blocks the main thread
func indexAll() async throws {
    let allItems = database.fetchAll()  // 50,000 items
    try await CSSearchableIndex.default().indexAppEntities()
}

// ✅ Correct -- batch index and run off main thread
func indexAll() async throws {
    try await CSSearchableIndex.default().indexAppEntities(
        of: RecipeEntity.self
    )
}

Review Checklist

Before shipping App Intents integration:

[ ] Every AppIntent has a static var title and static var description
[ ] Every AppEntity has typeDisplayRepresentation, displayRepresentation, and defaultQuery
[ ] @Parameter properties have descriptive titles
[ ] Entities used in Shortcuts have EntityStringQuery or EntityPropertyQuery
[ ] IndexedEntity types call CSSearchableIndex.default().indexAppEntities() after data changes
[ ] @Property fields used in indexing have indexingKey set
[ ] App Shortcuts have clear, natural-language phrases with \(.applicationName)
[ ] Intent modes match the actual work: background for data ops, foreground for UI
[ ] Interactive snippets use SnippetIntent (not plain AppIntent)
[ ] perform() handles errors gracefully and returns meaningful dialog
[ ] Intents are tested in Shortcuts app and via Siri voice
[ ] Deep links from entity results navigate to the correct screen

References

App Intents framework
Making your app's functionality available to Siri
App Shortcuts
IndexedEntity
Spotlight integration
/Users/ravishankar/Downloads/docs/AppIntents-Updates.md

Agent Skills: App Intents

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