What problem does it solve? Building WinUI 3 interfaces involves non-obvious pitfalls: missing DataGrid controls, x:Bind defaulting to OneTime, no SizeToContent window sizing, and High Contrast theming rules. This Skill provides decision tables, landmine warnings, and searchable code samples so XAML is written correctly the first time. ## Core Features & Use Cases - Control and layout mapping: Match app requirements to the right WinUI controls (NavigationView, TabView, ListView, ContentDialog) using app-shape anchors and a reach-for-this control map. - XAML landmine prevention: Covers x:Bind mode defaults, TextBox UpdateSourceTrigger, attached property setters, Converter={x:Null} crashes, and DPI-aware window sizing with GetDpiForWindow. - Theming and accessibility references: On-demand references for theme brushes, icon types, High Contrast dictionaries, and responsive layout review. - Use Case: When building a settings page for a Windows app, load this Skill to pick SettingsCard patterns, size the window correctly, bind the view model without silent OneTime bindings, and apply ThemeResource brushes that work in Light, Dark, and High Contrast. ## Quick Start Ask the assistant to design a WinUI 3 settings page with proper Fluent theming, correct x:Bind modes, and accessible controls.
