# Uno Platform

Build cross-platform .NET applications with Uno Platform targeting WebAssembly, iOS...

- Repository: https://github.com/managedcode/dotnet-skills (500 stars)
- Category: Testing
- License: MIT
- Last updated: 2026-10-29
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add managedcode/dotnet-skills --skill uno-platform -g -a claude-code -y`
Codex: `npx skills add managedcode/dotnet-skills --skill uno-platform -g -a codex -y`
Cursor: `npx skills add managedcode/dotnet-skills --skill uno-platform -g -a cursor -y`
Gemini CLI: `npx skills add managedcode/dotnet-skills --skill uno-platform -g -a gemini-cli -y`

## Description

Build cross-platform .NET applications with Uno Platform targeting WebAssembly, iOS, Android, macOS, Linux, and Windows from a single XAML/C# codebase. USE FOR: building cross-platform apps from a single C# and XAML codebase; targeting WebAssembly, iOS, Android, macOS, Linux, and Windows simultaneously; migrating WPF or UWP. DO NOT USE FOR: unrelated stacks; generic tasks that do not need this specific guidance. INVOKES: inspect the repository context, edit targeted files, and run relevant build, test, lint, or validation commands when changes are made.

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Uno Platform

## Trigger On

- building cross-platform apps from a single C# and XAML codebase
- targeting WebAssembly, iOS, Android, macOS, Linux, and Windows simultaneously
- migrating WPF or UWP applications to cross-platform
- implementing pixel-perfect UI across all platforms
- using WinUI/UWP APIs on non-Windows platforms

## Documentation

- [Uno Platform Overview](https://platform.uno/docs/articles/intro.html)
- [Getting Started](https://platform.uno/docs/articles/get-started.html?tabs=windows)
- [Using Uno Platform with WinUI](https://platform.uno/docs/articles/winui-doc-links.html)
- [Platform-Specific Code](https://platform.uno/docs/articles/platform-specific-xaml.html)
- [MVUX Pattern](https://platform.uno/docs/articles/external/uno.extensions/doc/Overview/Mvux/Overview.html)

## References

See detailed examples in the `references/` folder:
- [`patterns.md`](references/patterns.md), MVUX, XAML, navigation, and performance patterns

## Platform Support

| Platform | Rendering | Notes |
|----------|-----------|-------|
| Windows | WinUI 3 | Native Windows App SDK |
| WebAssembly | Skia/Canvas | Runs in browser |
| iOS | Skia/Metal | Native iOS app |
| Android | Skia/OpenGL | Native Android app |
| macOS | Skia/Metal | Mac Catalyst or AppKit |
| Linux | Skia/X11 | GTK or Framebuffer |

## Workflow

1. **Choose the right template**, Uno Platform offers various templates for different scenarios
2. **Understand rendering modes**, Skia vs native rendering affects performance and fidelity
3. **Apply MVVM or MVUX patterns**, keep views dumb, logic in ViewModels
4. **Handle platform differences**, use conditional XAML or partial classes
5. **Test on all target platforms**, behavior varies across platforms

## Project Structure

The rest: https://github.com/managedcode/dotnet-skills/blob/HEAD/catalog/Frameworks/Uno-Platform/skills/uno-platform/SKILL.md