Axiom Swiftui

# SwiftUI

**You MUST use this skill for ANY SwiftUI work including views, state, navigation, layout, animations, architecture, gestures, and debugging.**

## Quick Reference

| Symptom / Task | Reference |
|----------------|-----------|
| View not updating | See `skills/debugging.md` |
| View update still broken after debugging | See `skills/debugging-diag.md` |
| Slow previews / building good previews / `@Previewable` / `PreviewModifier` / variant matrix | See `skills/previews.md` |
| Preview API reference (`#Preview`, traits, modes, Development Assets) | See `skills/previews-ref.md` |
| Preview crashes / won't load | See `skills/debugging.md` (Preview Crashes section) |
| Navigation issues | See `skills/nav.md` |
| Navigation still broken after debugging | See `skills/nav-diag.md` |
| Navigation API reference | See `skills/nav-ref.md` |
| Layout breaks on iPad/rotation | See `skills/layout.md` |
| Layout API reference | See `skills/layout-ref.md` |
| Performance/lag/slow scroll | See `skills/swiftui-performance.md` |
| Architecture/testability | See `skills/architecture.md` |
| Animation issues | See `skills/animation-ref.md` |
| Stacks/grids/outlines | See `skills/containers-ref.md` |
| Custom containers / List replacement (iOS 18+) | See `skills/containers-ref.md` Part 7 |
| Search implementation | See `skills/search-ref.md` |
| Toolbars, ToolbarItem, sheet button placement, customization | See `skills/toolbars.md` |
| Gesture conflicts | See `skills/gestures.md` |
| iOS 26 features | See `skills/26-ref.md` |

## Non-SwiftUI UI Routes

These topics are part of the broader iOS UI domain but live in separate suites:

#### UIKit issues
- Auto Layout conflicts → See axiom-uikit (skills/auto-layout-debugging.md)
- Animation timing → See axiom-uikit (skills/uikit-animation-debugging.md)
- SwiftUI ↔ UIKit bridging → See axiom-uikit (skills/uikit-bridging.md)

#### Design & guidelines
- Liquid Glass adoption → See axiom-design (skills/liquid-glass.md)
- SF Symbols → See axiom-design (skills/sf-symbols.md)
- HIG compliance → See axiom-design (skills/hig.md)
- Typography → See axiom-design (skills/typography-ref.md)
- TextKit/rich text → See axiom-uikit (skills/textkit-ref.md)

#### Other
- tvOS (focus, remote, text input) → See axiom-swift (skills/tvos.md)
- App-level composition (root, auth, scenes) → See axiom-design (skills/app-composition.md)
- Drag/drop, sharing, copy/paste → See axiom-swift (skills/transferable-ref.md)
- VoiceOver, Dynamic Type → `/skill axiom-accessibility`
- UI test flakiness → `/skill axiom-testing`
- UX dead ends, dismiss traps → Launch `ux-flow-auditor` agent

#### watchOS-specific patterns
- Glanceable UI, watch navigation, Smart Stack widgets → See axiom-watchos

## Conflict Resolution

**axiom-swiftui vs axiom-performance**: When UI is slow (e.g., "SwiftUI List slow"):
1. **Try axiom-swiftui FIRST** — Domain-specific fixes (LazyVStack, view identity, @State optimization) often solve UI performance in 5 minutes
2. **Only use axiom-performance** if domain fixes don't help — Profiling takes longer and may confirm what domain knowledge already knows

## Decision Tree

```dot
digraph swiftui {
    start [label="SwiftUI issue" shape=ellipse];
    what [label="What's wrong?" shape=diamond];

    start -> what;
    what -> "skills/debugging.md" [label="view not updating"];
    what -> "skills/nav.md" [label="navigation"];
    what -> "skills/swiftui-performance.md" [label="slow/lag"];
    what -> "skills/layout.md" [label="adaptive layout"];
    what -> "skills/containers-ref.md" [label="stacks/grids/outlines"];
    what -> "skills/architecture.md" [label="feature architecture"];
    what -> "skills/animation-ref.md" [label="animations"];
    what -> "skills/gestures.md" [label="gestures"];
    w