Xamarin Android Migration

What it does

When your agent uses it

• : migrate Xamarin.Android
• Upgrade Xamarin.Android to .NET
• Xamarin.Android to .NET for Android
• Android project migration

Example prompts

• “migrate Xamarin.Android”
• “upgrade Xamarin.Android to .NET”
• “Xamarin.Android to .NET for Android”
• “/xamarin-android-migration”

Workflow steps

10 steps, taken from the first numbered list in SKILL.md.

1. 1Create new .NET for Android project (dotnet new android)
2. 2Copy code and resources into the new project
3. 3Update MSBuild properties (see references/android-migration-api.md)
4. 4Update AndroidManifest.xml — remove , use csproj properties
5. 5Delete Resource.designer.cs (regenerated automatically)
6. 6Update NuGet dependencies
7. 7Migrate binding libraries (if applicable)
8. 8Replace Xamarin.Essentials with true
9. 9Handle encoding changes
10. 10Delete bin//obj/, build, test on physical devices

What it can do on your machine

Read from SKILL.md and the folder at commit 79bb4bf. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Shell commands in SKILL.md call:

  • dotnet

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Xamarin Android Migration loads about 1.4k tokens when it runs, and up to ~2.9k if it reads all its reference files. Until then it costs about 213 tokens; SKILL.md has 463 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~213

When it runs · the whole SKILL.md, loaded when a task matches

~1.4k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~2.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from davidortinau/maui-skills at commit 79bb4bf, republished under its MIT licence (© davidortinau). 463 words, ~1,395 tokens.

name

xamarin-android-migration

description

**WORKFLOW SKILL** - Guide for migrating Xamarin.Android native apps to .NET for Android. Covers SDK-style project conversion, target framework monikers, MSBuild property changes, AndroidManifest.xml updates, NuGet dependency compatibility, Android binding library migration, Xamarin.Essentials in native apps, .NET CLI support, and platform-specific gotchas. USE FOR: "migrate Xamarin.Android", "upgrade Xamarin.Android to .NET", "Xamarin.Android to .NET for Android", "Android project migration", "Android binding library migration", "convert Android project to SDK-style", "AndroidSupportedAbis to RuntimeIdentifiers". DO NOT USE FOR: migrating Xamarin.Forms apps (use xamarin-forms-migration), migrating Xamarin.iOS apps (use xamarin-ios-migration), creating new MAUI apps from scratch (use feature-specific MAUI skills).

<!-- ❌ Xamarin-style — causes build warnings/errors -->
<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="33" />

<!-- ✅ Use MSBuild properties instead -->
<TargetFramework>net8.0-android</TargetFramework>
<SupportedOSPlatformVersion>21</SupportedOSPlatformVersion>

// ❌ Forgetting this → permissions silently fail
// ✅ Required in EVERY Activity that uses Essentials
public override void OnRequestPermissionsResult(
    int requestCode, string[] permissions, Permission[] grantResults)
{
    Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);
    base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
}

© davidortinau, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in plugins/maui-skills/skills/xamarin-android-migration of davidortinau/maui-skills.

• SKILL.md
• references/android-migration-api.md

Open the folder on GitHubat commit 79bb4bf