Engineering Agentic Workflows: App Intents as the New UI

In 2026, the definition of a “User Interface” has expanded. While the graphical UI remains the primary point of manual interaction, the System Agent (driven by Apple Intelligence) has become the primary point of automated interaction.

To thrive in this ecosystem, senior engineers must stop thinking of App Intents as “Siri Shortcuts” and start seeing them as the public API of their application’s logic.

1. From Reactive to Proactive

Traditional app design is reactive: a user taps a button, and the app responds. Agentic Workflows are proactive. An agent can plan and execute multi-step tasks—like “Find my flight receipt in Mail and add the hotel address to my navigation app”—by orchestrating App Intents across different binaries.

If your app doesn’t expose its core actions via App Intents, it is invisible to this intelligent layer.

2. Architecting for Discoverability

An App Intent is only as good as its metadata. To make your actions discoverable by the system agent, you must provide high-signal semantic information:

• Parameter Summaries: Clear descriptions of what each input does.
• App Entities: Map your internal data models (e.g., Project, Task, Invoice) to AppEntity so the system can resolve “that invoice from yesterday” to a specific object in your database.
• Title & Description: Use natural language that reflects user intent, not developer jargon.

struct CreateInvoiceIntent: AppIntent {
    static var title: LocalizedStringResource = "Create Invoice"
    
    @Parameter(title: "Client Name")
    var clientName: String
    
    @Parameter(title: "Amount")
    var amount: Decimal
    
    func perform() async throws -> some IntentResult {
        let invoice = try await InvoiceEngine.shared.create(for: clientName, amount: amount)
        return .result(value: invoice, dialog: "Invoice for \(clientName) created successfully.")
    }
}

3. Senior Strategy: The “Headless” Engine

To support agentic workflows effectively, your business logic must be decoupled from your View Controllers and SwiftUI Views.

• Dependency Injection: Your App Intents should be able to resolve dependencies (like a Database Service) even when the app is running in the background.
• Side-Effect Management: Since an agent might trigger an intent while the user is looking at a different app, ensure your logic doesn’t rely on the current UI state.

4. The Intelligence Schema

Apple’s Intelligence Schema (introduced in late 2025) provides a standardized way to categorize intents. By conforming to schemas like WorkforceManagement or FinancialServices, you tell the system agent exactly what “role” your app plays in the user’s digital life. This increases the likelihood of your app being selected to fulfill a complex request.

Conclusion: The Invisible Interface

The most successful apps of 2026 are those that empower the user without requiring them to “open” the app. By engineering robust, semantically rich App Intents, you are building an interface that transcends the screen. You are building an app that is truly part of the system.

Checkpoint for the Reader

Identify the “top 3” actions users perform in your app. Can these be executed entirely via an App Intent today? If not, that is your next architectural priority.