Design & UX

Use when auditing site accessibility. WCAG, a11y.

Use when reviewing animation code against a high craft bar.

Build creative browser demos with DOM-free text layout.

**Trigger**: Use when developing native iOS applications — SwiftUI, UIKit, navigation, accessibility, and App Store deployment. A practical guide for building iOS applications using UIKit, SnapKit, and SwiftUI. Focuses on proven patterns and Apple platform conventions.

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Helps with aesthetic direction, typography, and making choices that don't read as templated defaults.

Select a consistent visual design system for PPT slides using radius/spacing style recipes. Use when users ask for overall style direction or component styling consistency. Includes Sharp/Soft/Rounded/Pill recipes, component mappings, typography/spacing rules, and mixing guidance. Triggers: 风格, style, radius, spacing, 圆角, 间距, PPT风格, 视觉风格, design style, component style.

Author/validate/export Google's DESIGN.md token spec files.

Use when implementing data visualization and dashboards.

Use when building gesture-driven or Apple-style interfaces.

Use when implementing web animations and transitions.

Use when migrating a WPF application to Avalonia, mapping WPF concepts to Avalonia equivalents, or understanding differences between WPF and Avalonia APIs.

Use when applying styles, control themes, pseudoclasses, style selectors, theme variants, or custom fonts in Avalonia. Covers Style vs ControlTheme distinction, selector syntax, nested styles, light/dark theme variants, style sharing via avares://, StyleKeyOverride, and style precedence rules.

Use when accessing Avalonia platform services via TopLevel: clipboard read/write, file/folder/save dialogs via StorageProvider, URI/file launching via Launcher, screen and window info, focus manager, in-app notifications via WindowNotificationManager, or IME input method access.

Use when working with Avalonia's property system: StyledProperty, DirectProperty, AttachedProperty, property inheritance, metadata override, coercion, value priority, or observing property changes via GetObservable or OnPropertyChanged.

Use before merging a PR or shipping a release of an Avalonia app — exhaustive pre-delivery checklist covering visual quality, interaction, light/dark, layout, accessibility, performance, motion, and platform parity. Run end-to-end; fix everything before sign-off.

Use when adding animation, hover/press feedback, page transitions, list-item entrance, or honoring reduced-motion in an Avalonia app. Covers Transitions, Animation, KeyFrame, easing, IterationCount, and shared-element patterns.

Use when establishing or refactoring an Avalonia app's design system — semantic color tokens, theme-variant dictionaries (light/dark), typography scale, spacing rhythm, radius and elevation tokens. Produces production-ready Resources/Tokens.axaml.

Use when designing or polishing the visual quality of an Avalonia app — choosing themes, building a design system, crafting beautiful screens, improving accessibility, motion, layout, or before shipping a UI. Routes to focused sub-skills for tokens, themes, components, motion, accessibility, layout patterns, icons, and pre-delivery review.

Use when working with Avalonia brushes, transforms, geometry, clipping, animations, transitions, or bitmap effects. Covers SolidColorBrush, LinearGradientBrush, RadialGradientBrush, ConicGradientBrush, ImageBrush, VisualBrush, RenderTransform, shapes, Path geometry, clipping, BoxShadow, keyframe Animation class, property Transitions, and page transitions.

Use when defining DataTemplate, ItemTemplate, ContentTemplate, selecting templates by data type, using TreeDataTemplate for hierarchical data, implementing IDataTemplate selectors, or using FuncDataTemplate in Avalonia. Covers template scoping, app-level templates, and compiled binding in templates.

Use when working with Avalonia layout container controls: Border, ScrollViewer, SplitView, Expander, Viewbox, or Panel variants (Grid, StackPanel, WrapPanel, DockPanel, UniformGrid, Canvas). Covers container-specific API, properties, scroll configuration, and layout pitfalls in Avalonia 12.

Use when working with Avalonia data display controls: TextBlock, Label, ListBox, DataGrid, TreeView, ItemsControl, Carousel, or MarkdownViewer. Covers binding patterns, templates, virtualization, selection modes, and column configuration for Avalonia 12.

Use when working with built-in Avalonia controls. Routes to the correct sub-subskill for the control category needed.

Use when working with Avalonia UI framework — building, styling, binding, animating, or deploying Avalonia apps with .NET.