Integrating your messaging app with Apple Intelligence

At a glance

Project structure

Source bundle/
└── UnicornChat/
    ├── UnicornChatApp.swift
    ├── Managers/
    │   ├── ConversationManager.swift
    │   ├── NavigationManager.swift
    │   ├── ContactManager.swift
    │   ├── GraphicsManager.swift
    │   ├── ModelManager.swift
    │   └── NotificationManager.swift
    ├── AppIntents/
    │   ├── MessageEntity.swift
    │   └── MessageIntents.swift
    └── Views/
        ├── Contact/
        │   ├── ContactView.swift
        │   └── RecipientsView.swift
        └── Conversation/
            └── ConversationRowContent.swift

Structure observations

• Architecturally prominent files are ranked from entry points and role-named declarations; resource-only paths are omitted.
• Primary languages: Swift.
• The verified tree contains 4 project/configuration file(s) and 66 source declaration(s).

Overall architecture

flowchart LR
    N1["UnicornChatApp"]
    N2["ContactView"]
    N3["ContactManager"]
    N4["AppIntents APIs"]
    N1 --> N2
    N2 --> N3
    N3 --> N4

Reference code

UnicornChat/UnicornChatApp.swift:12 — architecture anchor

@main
struct UnicornChatApp: App {
    // ...
    let model: ModelManager
    // ...
}

Interpretation

The arrows summarize the source-visible entry, role-named types or folders, and framework direction; when nodes come from structural folders, the sequence is a high-level interpretation rather than proof that every adjacent node calls the next. Ownership is claimed only where the next section cites a stored property or assignment. The diagram is intentionally limited to the dominant path into App Intents.

Ownership and state

classDiagram
    MessageEntity *-- MessageQuery : defaultQuery
    MessageEntity *-- UUID : id
    MessageEntity o-- MessageType : messageType
    MessageEntity o-- ContactEntity : author

Ownership evidence

UnicornChat/AppIntents/MessageEntity.swift:20 — stored dependency or nearest verified ownership anchor

@AppEntity(schema: .messages.message)
struct MessageEntity: IndexedEntity {
    // ...
    static let defaultQuery = MessageQuery()
    // ...
}

Composition arrows indicate a source-visible construction expression or locally owned value state; aggregation means the owner stores or receives a dependency without proving exclusive lifetime ownership.

Concurrency, scheduling, and thread safety

Evidence limit: actor isolation, async/await, or Task creation does not by itself prove background-thread execution; Sendable conformance alone does not prove thread-safe mutation.

@MainActor/MainActor.run, DispatchQueue.main, and RunLoop.main are reported as distinct isolation, queue, and event-loop mechanisms. A plain Task is kept separate from Task.detached; neither is labeled as a background thread.

Reference code

UnicornChat/AppIntents/ContactEntity.swift:57 — representative execution boundary

        func entities(for identifiers: [ContactEntity.ID]) async throws -> [ContactEntity] {
            try await model.contactEntities(for: identifiers)
        }

State propagation, frameworks, and dependencies

Evidence limit: an import proves a source-level compilation dependency at the cited line; it does not prove runtime use, architectural adoption, or whether a Swift package is a direct application dependency.

receive(on:) describes downstream delivery scheduling, while subscribe(on:) describes upstream subscription/request/cancel scheduling. An import Combine alone establishes neither behavior nor a Store, reducer, Redux, or other application architecture.

Class and protocol design

UnicornChat/UnicornChatApp.swift:13 — representative type boundary

@main
struct UnicornChatApp: App {
    // ...
    let model: ModelManager
    // ...
}

No local protocol conformance is claimed as protocol-oriented design; external framework conformances are listed only as dependencies.

Access control

Reference code

UnicornChat/Managers/ContactManager.swift:69 — representative boundary

    private init() {}

Swift declarations without a modifier are internal; explicit private, fileprivate, private(set), public, or open entries above are interpreted by language semantics. Objective-C/C samples instead rely on header and implementation boundaries, which are not equivalent to Swift lexical privacy.

Logic ownership and placement

Design patterns

Main application flow

sequenceDiagram
    participant ModelManager
    participant CSSearchableIndex
    participant NotificationManager
    ModelManager->>CSSearchableIndex: default()
    ModelManager->>CSSearchableIndex: default()
    ModelManager->>CSSearchableIndex: default()
    ModelManager->>NotificationManager: requestAuthorization()

Reference code

UnicornChat/Managers/ModelManager.swift:77 — storeDidFinishLaunching()

    func storeDidFinishLaunching() async throws {
        let contacts = ContactManager.shared.contacts

        // Stage permanent data.
        for contact in contacts {
            modelContext.insert(contact)
        }
        try modelContext.save()

        // Fetch entities.
        let contactEntities = try fetchRecentContacts(limit: nil).map(\.entity)
        let conversationEntities = try fetchRecentConversations(limit: nil).map(\.entity)
        let messageEntities = try fetchRecentMessages(limit: nil).map(\.entity)

        // Index content to Spotlight.
        try? await CSSearchableIndex.default().indexAppEntities(contactEntities)
        try? await CSSearchableIndex.default().indexAppEntities(conversationEntities)
        try? await CSSearchableIndex.default().indexAppEntities(messageEntities)

        // Request permission to post notifications at launch.
        try await NotificationManager.shared.requestAuthorization()
    }

Naming conventions

• Types: App: UnicornChatApp; Manager: ContactManager, ConversationManager, GraphicsManager, ModelManager, NavigationManager; Model: ConversationModel; View: ContactView, ContentView, ConversationView, CreateMessageView, RecipientsView.
• Protocols: no local protocol declaration in the scanned source.
• Methods: responses, generateResponse, session, instructions, buildPrompt, entities, suggestedEntities, perform.
• Files: UnicornChat/UnicornChatApp.swift, UnicornChat/Managers/ConversationManager.swift, UnicornChat/AppIntents/MessageEntity.swift, UnicornChat/Managers/NavigationManager.swift, UnicornChat/Managers/ContactManager.swift, UnicornChat/Managers/GraphicsManager.swift.

Architecture takeaways

• UnicornChatApp is the main source-visible entry or composition anchor for this sample.
• Framework work reaches SwiftData, SwiftUI, AppIntents, PhotosUI through a deliberately small high-level chain; the detailed API graph remains inside the cited implementation files.
• Stored-property evidence identifies lifecycle collaboration; it does not by itself prove exclusive object ownership.
• Access-control conclusions separate verified language visibility from the likely design rationale.
• The source does not justify labeling the design protocol-oriented.

Source map

• Official Apple documentation