imnotyourson

Your code and agents are scapegoats; I want you to be nice to it.

Xcode ships documentation for AI agents, you should copy it

xcodeagent

Xcode 26.3 ships with an AI assistance feature. Since I’m not currently using Xcode itself for developing iOS and macOS apps, the most important thing Xcode ships is Apple’s documentation written specifically for AI agents.

I copy these files into my project and ask my agent to read and follow them for the corresponding topics. It’s a true gold mine for developers working with AI agents on Apple platforms.

Where to find them

The documentation lives inside the Xcode app bundle:

/Applications/Xcode.app/Contents/PlugIns/IDEIntelligenceChat.framework/Versions/A/Resources/AdditionalDocumentation

Xcode AdditionalDocumentation folder

What’s inside

As of Xcode 26.3, you get 20 markdown files covering a wide range of Apple frameworks and APIs:

Liquid Glass (iOS 26 Design Language)

  • SwiftUI-Implementing-Liquid-Glass-Design.md — Implementing Liquid Glass effects in SwiftUI
  • UIKit-Implementing-Liquid-Glass-Design.md — Implementing Liquid Glass effects in UIKit
  • AppKit-Implementing-Liquid-Glass-Design.md — Implementing Liquid Glass effects in AppKit
  • WidgetKit-Implementing-Liquid-Glass-Design.md — Implementing Liquid Glass effects in WidgetKit

Swift Language

  • Swift-Concurrency-Updates.md — Swift 6.2 concurrency and data-race safety updates
  • Swift-InlineArray-Span.md — InlineArray and Span types for performance

SwiftUI

  • SwiftUI-New-Toolbar-Features.md — New toolbar APIs and customization
  • SwiftUI-Styled-Text-Editing.md — Styled text editing support
  • SwiftUI-WebKit-Integration.md — WebKit integration in SwiftUI
  • SwiftUI-AlarmKit-Integration.md — AlarmKit integration in SwiftUI

Frameworks

  • FoundationModels-Using-on-device-LLM-in-your-app.md — Apple’s on-device LLM framework (Foundation Models)
  • Foundation-AttributedString-Updates.md — AttributedString API updates
  • AppIntents-Updates.md — App Intents framework updates
  • StoreKit-Updates.md — StoreKit API updates
  • SwiftData-Class-Inheritance.md — SwiftData class inheritance support
  • MapKit-GeoToolbox-PlaceDescriptors.md — MapKit GeoToolbox and PlaceDescriptors
  • Swift-Charts-3D-Visualization.md — Swift Charts 3D visualization

Platform Features

  • Implementing-Visual-Intelligence-in-iOS.md — Implementing Visual Intelligence in iOS
  • Implementing-Assistive-Access-in-iOS.md — Implementing Assistive Access in iOS
  • Widgets-for-visionOS.md — Building widgets for visionOS