| name | apple-27-apis |
| description | Apple's own documentation for APIs introduced in the Xcode 27 SDKs (macOS 26, iOS 26). Consult before writing or reviewing code that touches any of them — this supersedes prior training, which predates these APIs. Covers: Liquid Glass adoption in AppKit, SwiftUI, UIKit and WidgetKit; Swift 6.2 concurrency (nonisolated(nonsending), @concurrent, approachable defaults); InlineArray and Span; SwiftUI toolbars, styled text editing, WebKit embedding, AlarmKit; Foundation AttributedString; Foundation Models on-device LLM; SwiftData class inheritance; StoreKit; AppIntents; Swift Charts 3D; MapKit place descriptors; Assistive Access, Visual Intelligence and visionOS widgets. |
Apple's documentation for what shipped in the Xcode 27 SDKs. Prefer it over
recollection: these APIs are newer than most model training, and the failure mode
is confidently inventing a plausible-but-wrong signature.
Read the relevant reference before writing the code, not after — several of these
replace patterns that still compile and still look correct.
References
Adopting the new design language:
references/AppKit-Implementing-Liquid-Glass-Design.md: Liquid Glass in AppKit —
materials, toolbars, sidebars, and how existing chrome is affected.references/SwiftUI-Implementing-Liquid-Glass-Design.md: the SwiftUI equivalent.references/UIKit-Implementing-Liquid-Glass-Design.md: the UIKit equivalent.references/WidgetKit-Implementing-Liquid-Glass-Design.md: widgets specifically.
Language and standard library:
references/Swift-Concurrency-Updates.md: Swift 6.2 concurrency — approachable
concurrency defaults, nonisolated(nonsending), @concurrent, and what changes
when migrating a codebase held back on Swift 5 language mode.references/Swift-InlineArray-Span.md: InlineArray and Span — fixed-size
stack storage and safe borrowed views over contiguous memory.
SwiftUI:
references/SwiftUI-New-Toolbar-Features.md: toolbar API additions.references/SwiftUI-Styled-Text-Editing.md: rich text editing with
AttributedString in TextEditor.references/SwiftUI-WebKit-Integration.md: embedding WebKit, WebView and
WebPage.references/SwiftUI-AlarmKit-Integration.md: AlarmKit in a SwiftUI app.
Frameworks:
references/Foundation-AttributedString-Updates.md: AttributedString changes,
including its use as a first-class text-editing model.references/FoundationModels-Using-on-device-LLM-in-your-app.md: the on-device
LLM — availability checks, guided generation, tool calling, streaming.references/SwiftData-Class-Inheritance.md: class inheritance in SwiftData
models and its query implications.references/StoreKit-Updates.md: StoreKit changes for purchases and
subscriptions.references/AppIntents-Updates.md: AppIntents additions.references/Swift-Charts-3D-Visualization.md: 3D charts.references/MapKit-GeoToolbox-PlaceDescriptors.md: place descriptors with MapKit
and GeoToolbox.
Platform-specific, iOS and visionOS:
references/Implementing-Assistive-Access-in-iOS.md: Assistive Access support.references/Implementing-Visual-Intelligence-in-iOS.md: Visual Intelligence
integration.references/Widgets-for-visionOS.md: visionOS widgets.
