.NET MAUI Multi-Target Publishing

.NET MAUI (Multi-platform App UI) is Microsoft's evolution of Xamarin.Forms. A single .NET 8/9 codebase targets Android, iOS, Windows (WinUI 3), and macOS (Mac Catalyst).

This skill walks through:

1. .NET workload setup
2. Project structure
3. Per-target build commands
4. Signing per platform
5. Publishing modes (AOT, R2R, trimming)
6. Common migration pitfalls (Xamarin → MAUI)

When to invoke

• During /app-gtm-release:ship-maui Gates 1-3
• When the user asks: ".NET MAUI", "MAUI publishing", "dotnet maui", "MAUI signing", "MAUI iOS provisioning", "MAUI MSIX", "Xamarin migration"

Bar 1 — Workload setup