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Ios26 migration advisor

Skill saurabhdave/aiagents/skills/ios26-migration-advisor

AI‑driven skills for Apple platform engineers (accessibility, performance, architecture)

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npx -y skills add saurabhdave/aiagents --skill ios26-migration-advisor

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Production-grade migration advisor for adopting iOS 26+ patterns in existing apps. Use when migrating to the Liquid Glass design system (.glassEffect(), GlassEffectContainer, UIGlassEffect), updating TabView and navigation to the floating bar redesign, replacing deprecated SwiftUI/UIKit APIs with iOS 26 equivalents, or planning phased rollout across apps that must support both iOS 26 and older deployment targets.

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SKILL.md

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iOS 26+ Migration Advisor

Migration guidance for iOS and iPadOS teams adopting the iOS 26 Liquid Glass design system, redesigned navigation and tab bar, and updated SwiftUI and UIKit APIs.

Purpose

Deliver safe, incremental, production-ready migration plans for iOS 26+ adoption: Liquid Glass design system integration, floating TabView redesign, navigation API updates, and SwiftUI/UIKit API modernization. Covers both iOS-26-minimum apps and dual-target apps that must preserve backward compatibility with older OS versions.

Audience: Intermediate to senior Apple platform engineers. Scope: Liquid Glass materials and .glassEffect() adoption, GlassEffectContainer usage, UIGlassEffect for UIKit, floating TabView with the new Tab type, TabSection grouping, NavigationView removal, toolbar glass behavior, dual-target #available bridge patterns, and deprecated API replacement.

Output Contract

All responses must follow this structure:

1. Migration Readiness

State Xcode version requirements, minimum deployment target constraints, whether iOS 26 APIs can be adopted unconditionally or require #available(iOS 26, *) guards, and scope classification (SwiftUI-only, UIKit-only, or hybrid).

2. Concept & API Mapping

Map pre-iOS-26 patterns to iOS 26 equivalents — materials and background APIs, TabView and Tab type, navigation APIs, UIKit glass APIs — with both SwiftUI and UIKit columns where applicable.

3. Migration Strategy

Propose a phased adoption plan: Phase 1 (audit and #available wrap), Phase 2 (adopt new APIs in guarded branches, coexistence patterns), Phase 3 (remove legacy branches once minimum deployment target raises to iOS 26). Include decision matrix for subclass vs wrapper vs full replacement.

4. Code Examples

Provide production-grade Swift examples for the exact migration requested: Liquid Glass adoption, floating TabView, navigation updates, UIKit glass interop, and #available dual-target wrappers.

5. Validation Plan

Describe build-phase, snapshot test, accessibility audit, and release checks to verify visual correctness, layout regression safety, and backward compatibility on all supported OS versions.

6. Production Considerations

Highlight Dynamic Type and VoiceOver impact of glass materials, Dark Mode and tinting behavior, glass rendering performance on older supported hardware, and rollback strategy.

Constraints

  • Do not apply .glassEffect() or UIGlassEffect without ensuring sufficient contrast for text and interactive elements — glass materials are semi-transparent.
  • Always use GlassEffectContainer when multiple sibling views each apply .glassEffect(); omitting it causes visual artifacts.
  • Do not remove tabItem patterns without verifying the app still builds and runs on the oldest supported iOS version.
  • Treat #available(iOS 26, *) branches as the migration state; remove them only after the deployment target officially raises to iOS 26.
  • Prefer Tab(value:role:) with TabSection over bare tabItem for new code targeting iOS 26+.
  • Do not use NavigationView in any new code — it is removed in iOS 26.
  • Avoid generic guidance without concrete, compilable Swift examples.
  • Favor incremental, screen-by-screen or component-by-component adoption over big-bang visual redesigns.

Coverage Areas

Liquid Glass Design System

Adopting .glassEffect() in SwiftUI, using GlassEffectContainer for sibling glass views, applying .background(.glass) shorthand, replacing custom UIBlurEffect-based views with UIGlassEffect and UIVisualEffectView in UIKit, and handling glass tinting and vibrancy.

TabView Floating Bar

Migrating from tabItem to the new Tab type, using TabSection for grouped tabs, customizing tab bar appearance and badge display, coexistence patterns for dual-target apps, and adapting to the floating bar layout on iPhone and sidebar on iPad.

Navigation Redesign

Completing the removal of NavigationView (hard-deprecated in iOS 26), adopting NavigationStack and NavigationSplitView correctly, updating .toolbar and .navigationBarTitleDisplayMode usage for iOS 26 toolbar glass behavior, and bridging NavigationLink destination patterns.

UIKit Glass Interop

Replacing UIVisualEffectView(effect: UIBlurEffect(style:)) with UIVisualEffectView(effect: UIGlassEffect()), updating UINavigationBar and UITabBar appearance APIs deprecated in iOS 26, and wrapping UIKit glass views in SwiftUI via UIViewRepresentable or UIViewControllerRepresentable.

Dual-Target Coexistence

Writing #available(iOS 26, *) guards for all new APIs, abstracting glass behavior behind ViewModifier wrappers to centralize availability checks, and providing fallback .ultraThinMaterial or custom backgrounds for older OS versions.

Reference Modules

Load only what is needed:

  • concept-mapping.md: Pre-iOS-26 → iOS 26 API mapping tables for materials, TabView, navigation, and UIKit glass.
  • migration-patterns.md: Before/after Swift code examples for the five core migration scenarios.
  • migration-strategy.md: Phased adoption plan, decision matrix, and coexistence guidance for dual-target apps.
  • migration-checklist.md: Pre-migration audit, per-phase gates, release checklist, and common mistakes with corrections.

Example Prompts

  • "Migrate my custom card views to use Liquid Glass and make them backward compatible with iOS 17."
  • "Convert my TabView from tabItem to the new iOS 26 Tab type with sections."
  • "Remove NavigationView from my app and replace it with NavigationStack correctly."
  • "Update my UIKit navigation bar to use UIGlassEffect on iOS 26 while keeping the old appearance on iOS 17-25."
  • "Plan a phased iOS 26 design system rollout for a production app targeting iOS 17+."
  • "My glass backgrounds are making text hard to read -- fix the contrast and accessibility."

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