C# Markup for Uno Platform: code-first UI with fluent API, strongly-typed data binding, resources, styles, templates, and Uno Toolkit integration. Use when: (1) Building UI in C# instead of XAML, (2) Using fluent data binding with expression trees, (3) Applying styles and templates in C# Markup, (4) Integrating Uno Toolkit controls in C# Markup, (5) Setting up a C# Markup project from scratch, (6) Converting XAML patterns to C# Markup. Do NOT use for: XAML-based UI (see winui-xaml) or Toolkit control reference (see uno-toolkit).
Uno Material Design 3 theming: installation, MD3 color system, typography, button/TextBox/FAB styles, control extensions, lightweight styling, C# Markup integration, and version migration. Use when: (1) Installing or configuring Material theme, (2) Customizing colors or fonts, (3) Applying Material button/TextBox/FAB styles, (4) Using lightweight styling overrides, (5) Migrating between Material versions, (6) Debugging blank pages from wrong resource keys. Do NOT use for: navigation (see uno-navigation), MVUX patterns (see mvux), general XAML layout (see winui-xaml).
Comprehensive Uno Platform development patterns for Single Project architecture, MVVM/MVUX, navigation, styling, platform-specific code, and custom controls. Use when: (1) Creating new Uno Platform projects, (2) Implementing MVVM or MVUX patterns, (3) Setting up navigation or styling, (4) Writing platform-specific code, (5) Building custom controls, (6) Optimizing build configuration with Uno.Sdk. Do NOT use for: XAML-only best practices (see winui-xaml), Toolkit control APIs (see uno-toolkit), or service-layer extensions (see uno-extensions-services).
Uno Toolkit UI controls and helpers: AutoLayout, SafeArea, Card, Chip, TabBar, NavigationBar, DrawerControl, ShadowContainer, and extensions (CommandExtensions, InputExtensions, ResponsiveExtension, ItemsRepeaterExtensions, StatusBarExtensions). Use when: (1) Building responsive layouts with AutoLayout or SafeArea, (2) Using Card/Chip/TabBar/NavigationBar controls, (3) Attaching commands to control events, (4) Implementing form input UX, (5) Adding selection/incremental loading to ItemsRepeater, (6) Lightweight styling Toolkit controls. Do NOT use for: Material theme colors/typography (see uno-material), navigation routing (see uno-navigation), MVUX patterns (see mvux).
.NET C# best practices for building performant, secure, and maintainable applications. Use when: (1) Writing new .NET/C# code, (2) Reviewing code for performance issues, (3) Identifying security vulnerabilities, (4) Refactoring existing applications, (5) Architecting new systems, (6) Debugging production issues. Do NOT use for: XAML-only best practices (see winui-xaml), Uno Platform project setup (see uno-platform-agent), or service-layer extensions (see uno-extensions-services).
MVUX (Model-View-Update-eXtended) architecture for Uno Platform: immutable records, reactive feeds/states, FeedView, commands, selection, messaging, and pagination. Use when: (1) Creating MVUX models with IFeed/IState/IListFeed/IListState, (2) Displaying async data with FeedView, (3) Implementing two-way binding with states, (4) Working with commands, selection, or messaging, (5) Debugging blank FeedView or missing command generation. Do NOT use for: MVVM patterns (use CommunityToolkit.Mvvm directly), general XAML layout (see winui-xaml), navigation (see uno-navigation).
Provides assertion and validation patterns for UI testing of Uno Platform applications. Use this skill when you need to validate UI state, verify element properties, compare screenshots, or assert on data binding values during automated testing. Complements the uno-app-ui-testing skill with validation-specific guidance.
Automates UI testing for Uno Platform applications using the Uno App MCP server tools. Use this skill when performing automated UI testing, visual validation, interaction testing, or end-to-end testing of Uno Platform cross-platform applications. Covers app lifecycle management, visual tree inspection, element interaction, screenshot capture, and test assertions.