Official agent skill

Winui3 Migration Guide

UWP-to-WinUI 3 migration reference. An agent skill from github/awesome-copilot.

OfficialMITAuto-check passedDevelopment

Install Winui3 Migration Guide

skills CLI

$ npx skills add github/awesome-copilot --skill winui3-migration-guide -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install github/awesome-copilot winui3-migration-guide --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/winui3-migration-guide .claude/skills/winui3-migration-guide && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "winui3-migration-guide" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide into .claude/skills/winui3-migration-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "winui3-migration-guide", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add github/awesome-copilot --skill winui3-migration-guide -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install github/awesome-copilot winui3-migration-guide --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/winui3-migration-guide .agents/skills/winui3-migration-guide && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "winui3-migration-guide" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide into .agents/skills/winui3-migration-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "winui3-migration-guide", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add github/awesome-copilot --skill winui3-migration-guide -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install github/awesome-copilot winui3-migration-guide --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/winui3-migration-guide .cursor/skills/winui3-migration-guide && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "winui3-migration-guide" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide into .cursor/skills/winui3-migration-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "winui3-migration-guide", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/github/awesome-copilot.git --path skills/winui3-migration-guide

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add github/awesome-copilot --skill winui3-migration-guide -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install github/awesome-copilot winui3-migration-guide --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/winui3-migration-guide .gemini/skills/winui3-migration-guide && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "winui3-migration-guide" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide into .gemini/skills/winui3-migration-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "winui3-migration-guide", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install github/awesome-copilot winui3-migration-guide

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add github/awesome-copilot --skill winui3-migration-guide -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/winui3-migration-guide .github/skills/winui3-migration-guide && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "winui3-migration-guide" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide into .github/skills/winui3-migration-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "winui3-migration-guide", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add github/awesome-copilot --skill winui3-migration-guide -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install github/awesome-copilot winui3-migration-guide --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/winui3-migration-guide .opencode/skills/winui3-migration-guide && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "winui3-migration-guide" agent skill from https://github.com/github/awesome-copilot/tree/main/skills/winui3-migration-guide into .opencode/skills/winui3-migration-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "winui3-migration-guide", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: winui3-migration-guide
GitHub stars: 40k
Used in: 1 other repo
Token cost: ~2.2k tokens
SKILL.md length: 457 words
Files: 1
Skills in repo: 417
Repo updated: Oct 7, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

UWP-to-WinUI 3 migration reference. An agent skill from github/awesome-copilot.

Works in 3 steps: ContentDialog Without XamlRoot → MessageDialog Instead of ContentDialog → CoreDispatcher Instead of DispatcherQueue
Tasks that involve Code migrations
SKILL.md covers Namespace Changes, Top 3 Most Common Copilot…, Windowing Migration and Dialogs and Pickers Migration, plus 6 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Winui3 Migration Guide is an agent skill from github/awesome-copilot, published by the product's own GitHub organization. UWP-to-WinUI 3 migration reference. Maps legacy UWP APIs to correct Windows App SDK equivalents with before/after code snippets. Covers namespace changes, threading (CoreDispatcher to DispatcherQueue), windowing (CoreWindow to AppWindow), dialogs, pickers, sharing, printing, background tasks, and the most common Copilot code generation mistakes.

Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Code migrations. It works with Windows. The repository describes itself as: Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot. The licence is MIT.

When your agent uses it

Tasks that involve Code migrations

Example prompts

“/winui3-migration-guide”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

ContentDialog Without XamlRoot
MessageDialog Instead of ContentDialog
CoreDispatcher Instead of DispatcherQueue

What it can do on your machine

Read from SKILL.md and the folder at commit 727ff2e. 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
No scripts in the folder and no shell commands in SKILL.md (its code samples are csharp).
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

Winui3 Migration Guide loads about 2.2k tokens when it runs. Until then it costs about 93 tokens; SKILL.md has 457 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~93
When it runs · the whole SKILL.md, loaded when a task matches: ~2.2k

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

Auto-check passed

The automated check found no risky patterns in SKILL.md.

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 github/awesome-copilot at commit 727ff2e, republished under its MIT licence (© github). 457 words, ~2,226 tokens.

Download SKILL.mdSave it as .claude/skills/winui3-migration-guide/SKILL.md (or your agent's skills folder).

name: winui3-migration-guide
description: UWP-to-WinUI 3 migration reference. Maps legacy UWP APIs to correct Windows App SDK equivalents with before/after code snippets. Covers namespace changes, threading (CoreDispatcher to DispatcherQueue), windowing (CoreWindow to AppWindow), dialogs, pickers, sharing, printing, background tasks, and the most common Copilot code generation mistakes.

WinUI 3 Migration Guide

Use this skill when migrating UWP apps to WinUI 3 / Windows App SDK, or when verifying that generated code uses correct WinUI 3 APIs instead of legacy UWP patterns.

Namespace Changes

All Windows.UI.Xaml.* namespaces move to Microsoft.UI.Xaml.*:

UWP Namespace	WinUI 3 Namespace
`Windows.UI.Xaml`	`Microsoft.UI.Xaml`
`Windows.UI.Xaml.Controls`	`Microsoft.UI.Xaml.Controls`
`Windows.UI.Xaml.Media`	`Microsoft.UI.Xaml.Media`
`Windows.UI.Xaml.Input`	`Microsoft.UI.Xaml.Input`
`Windows.UI.Xaml.Data`	`Microsoft.UI.Xaml.Data`
`Windows.UI.Xaml.Navigation`	`Microsoft.UI.Xaml.Navigation`
`Windows.UI.Xaml.Shapes`	`Microsoft.UI.Xaml.Shapes`
`Windows.UI.Composition`	`Microsoft.UI.Composition`
`Windows.UI.Input`	`Microsoft.UI.Input`
`Windows.UI.Colors`	`Microsoft.UI.Colors`
`Windows.UI.Text`	`Microsoft.UI.Text`
`Windows.UI.Core`	`Microsoft.UI.Dispatching` (for dispatcher)

Top 3 Most Common Copilot Mistakes

1. ContentDialog Without XamlRoot

csharp

// ❌ WRONG — Throws InvalidOperationException in WinUI 3
var dialog = new ContentDialog
{
    Title = "Error",
    Content = "Something went wrong.",
    CloseButtonText = "OK"
};
await dialog.ShowAsync();

csharp

// ✅ CORRECT — Set XamlRoot before showing
var dialog = new ContentDialog
{
    Title = "Error",
    Content = "Something went wrong.",
    CloseButtonText = "OK",
    XamlRoot = this.Content.XamlRoot  // Required in WinUI 3
};
await dialog.ShowAsync();

2. MessageDialog Instead of ContentDialog

csharp

// ❌ WRONG — UWP API, not available in WinUI 3 desktop
var dialog = new Windows.UI.Popups.MessageDialog("Are you sure?", "Confirm");
await dialog.ShowAsync();

csharp

// ✅ CORRECT — Use ContentDialog
var dialog = new ContentDialog
{
    Title = "Confirm",
    Content = "Are you sure?",
    PrimaryButtonText = "Yes",
    CloseButtonText = "No",
    XamlRoot = this.Content.XamlRoot
};
var result = await dialog.ShowAsync();
if (result == ContentDialogResult.Primary)
{
    // User confirmed
}

3. CoreDispatcher Instead of DispatcherQueue

csharp

// ❌ WRONG — CoreDispatcher does not exist in WinUI 3
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
{
    StatusText.Text = "Done";
});

csharp

// ✅ CORRECT — Use DispatcherQueue
DispatcherQueue.TryEnqueue(() =>
{
    StatusText.Text = "Done";
});

// With priority:
DispatcherQueue.TryEnqueue(DispatcherQueuePriority.High, () =>
{
    ProgressBar.Value = 100;
});

Windowing Migration

Window Reference

csharp

// ❌ WRONG — Window.Current does not exist in WinUI 3
var currentWindow = Window.Current;

csharp

// ✅ CORRECT — Use a static property in App
public partial class App : Application
{
    public static Window MainWindow { get; private set; }

    protected override void OnLaunched(LaunchActivatedEventArgs args)
    {
        MainWindow = new MainWindow();
        MainWindow.Activate();
    }
}
// Access anywhere: App.MainWindow

Window Management

UWP API	WinUI 3 API
`ApplicationView.TryResizeView()`	`AppWindow.Resize()`
`AppWindow.TryCreateAsync()`	`AppWindow.Create()`
`AppWindow.TryShowAsync()`	`AppWindow.Show()`
`AppWindow.TryConsolidateAsync()`	`AppWindow.Destroy()`
`AppWindow.RequestMoveXxx()`	`AppWindow.Move()`
`AppWindow.GetPlacement()`	`AppWindow.Position` property
`AppWindow.RequestPresentation()`	`AppWindow.SetPresenter()`

Title Bar

UWP API	WinUI 3 API
`CoreApplicationViewTitleBar`	`AppWindowTitleBar`
`CoreApplicationView.TitleBar.ExtendViewIntoTitleBar`	`AppWindow.TitleBar.ExtendsContentIntoTitleBar`

Dialogs and Pickers Migration

File/Folder Pickers

csharp

// ❌ WRONG — UWP style, no window handle
var picker = new FileOpenPicker();
picker.FileTypeFilter.Add(".txt");
var file = await picker.PickSingleFileAsync();

csharp

// ✅ CORRECT — Initialize with window handle
var picker = new FileOpenPicker();
var hwnd = WinRT.Interop.WindowNative.GetWindowHandle(App.MainWindow);
WinRT.Interop.InitializeWithWindow.Initialize(picker, hwnd);
picker.FileTypeFilter.Add(".txt");
var file = await picker.PickSingleFileAsync();

Threading Migration

UWP Pattern	WinUI 3 Equivalent
`CoreDispatcher.RunAsync(priority, callback)`	`DispatcherQueue.TryEnqueue(priority, callback)`
`Dispatcher.HasThreadAccess`	`DispatcherQueue.HasThreadAccess`
`CoreDispatcher.ProcessEvents()`	No equivalent — restructure async code
`CoreWindow.GetForCurrentThread()`	Not available — use `DispatcherQueue.GetForCurrentThread()`

Key difference: UWP uses ASTA (Application STA) with built-in reentrancy blocking. WinUI 3 uses standard STA without this protection. Watch for reentrancy issues when async code pumps messages.

Background Tasks Migration

csharp

// ❌ WRONG — UWP IBackgroundTask
public sealed class MyTask : IBackgroundTask
{
    public void Run(IBackgroundTaskInstance taskInstance) { }
}

csharp

// ✅ CORRECT — Windows App SDK AppLifecycle
using Microsoft.Windows.AppLifecycle;

// Register for activation
var args = AppInstance.GetCurrent().GetActivatedEventArgs();
if (args.Kind == ExtendedActivationKind.AppNotification)
{
    // Handle background activation
}

App Settings Migration

Scenario	Packaged App	Unpackaged App
Simple settings	`ApplicationData.Current.LocalSettings`	JSON file in `LocalApplicationData`
Local file storage	`ApplicationData.Current.LocalFolder`	`Environment.GetFolderPath(SpecialFolder.LocalApplicationData)`

GetForCurrentView() Replacements

All GetForCurrentView() patterns are unavailable in WinUI 3 desktop apps:

UWP API	WinUI 3 Replacement
`UIViewSettings.GetForCurrentView()`	Use `AppWindow` properties
`ApplicationView.GetForCurrentView()`	`AppWindow.GetFromWindowId(windowId)`
`DisplayInformation.GetForCurrentView()`	Win32 `GetDpiForWindow()` or `XamlRoot.RasterizationScale`
`CoreApplication.GetCurrentView()`	Not available — track windows manually
`SystemNavigationManager.GetForCurrentView()`	Handle back navigation in `NavigationView` directly

Show full SKILL.md (206 more words)Show less

Testing Migration

UWP unit test projects do not work with WinUI 3. You must migrate to the WinUI 3 test project templates.

UWP	WinUI 3
Unit Test App (Universal Windows)	Unit Test App (WinUI in Desktop)
Standard MSTest project with UWP types	Must use WinUI test app for Xaml runtime
`[TestMethod]` for all tests	`[TestMethod]` for logic, `[UITestMethod]` for XAML/UI tests
Class Library (Universal Windows)	Class Library (WinUI in Desktop)

csharp

// ✅ WinUI 3 unit test — use [UITestMethod] for any XAML interaction
[UITestMethod]
public void TestMyControl()
{
    var control = new MyLibrary.MyUserControl();
    Assert.AreEqual(expected, control.MyProperty);
}

Key: The [UITestMethod] attribute tells the test runner to execute the test on the XAML UI thread, which is required for instantiating any Microsoft.UI.Xaml type.

Migration Checklist

Replace all Windows.UI.Xaml.* using directives with Microsoft.UI.Xaml.*
Replace Windows.UI.Colors with Microsoft.UI.Colors
Replace CoreDispatcher.RunAsync with DispatcherQueue.TryEnqueue
Replace Window.Current with App.MainWindow static property
Add XamlRoot to all ContentDialog instances
Initialize all pickers with InitializeWithWindow.Initialize(picker, hwnd)
Replace MessageDialog with ContentDialog
Replace ApplicationView/CoreWindow with AppWindow
Replace CoreApplicationViewTitleBar with AppWindowTitleBar
Replace all GetForCurrentView() calls with AppWindow equivalents
Update interop for Share and Print managers
Replace IBackgroundTask with AppLifecycle activation
Update project file: TFM to net10.0-windows10.0.22621.0, add <UseWinUI>true</UseWinUI>
Migrate unit tests to Unit Test App (WinUI in Desktop) project; use [UITestMethod] for XAML tests
Test both packaged and unpackaged configurations

Files

Just SKILL.md in skills/winui3-migration-guide of github/awesome-copilot.

Open the folder on GitHubat commit 727ff2e

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in github/awesome-copilot, which our catalogue first saw on October 7, 2026.

boshi-xixixi/TraeSkill.trae/Skills/.agents/skills/winui3-migration-guide

Compare with similar skills

Winui3 Migration Guide next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Winui3 Migration Guide compared with similar skills
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Migrate Core Code to Submodulestinyhumansai/openhuman	41k	—	~2.6k	Automated safety check: Pass	GPL-3.0	yesterday
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Questions about Winui3 Migration Guide

What does Winui3 Migration Guide do?

UWP-to-WinUI 3 migration reference. An agent skill from github/awesome-copilot. Winui3 Migration Guide is an agent skill from github/awesome-copilot, published by the product's own GitHub organization. UWP-to-WinUI 3 migration reference.

When should I use Winui3 Migration Guide?

Winui3 Migration Guide fits situations like: tasks that involve Code migrations.

How do I install Winui3 Migration Guide in Claude Code?

Run `npx skills add github/awesome-copilot --skill winui3-migration-guide -a claude-code`. Or copy the skill folder (skills/winui3-migration-guide in github/awesome-copilot) into .claude/skills/winui3-migration-guide in your project. Claude Code loads it when a task matches its description.

How do I install Winui3 Migration Guide in Codex?

Run `npx skills add github/awesome-copilot --skill winui3-migration-guide -a codex`. Or copy the skill folder (skills/winui3-migration-guide in github/awesome-copilot) into .agents/skills/winui3-migration-guide in your project. Codex loads it when a task matches its description.

Can I use Winui3 Migration Guide in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add github/awesome-copilot --skill winui3-migration-guide -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/winui3-migration-guide, .gemini/skills/winui3-migration-guide, .github/skills/winui3-migration-guide and .opencode/skills/winui3-migration-guide in your project.

What does Winui3 Migration Guide need to run?

SKILL.md names no scripts, command-line tools or credentials: Winui3 Migration Guide is instructions for the agent only.

Does Winui3 Migration Guide access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Winui3 Migration Guide safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Winui3 Migration Guide use?

Winui3 Migration Guide is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Winui3 Migration Guide use?

About 2.2k tokens (SKILL.md is roughly 8.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Winui3 Migration Guide?

Skills that share tags, products or a category with Winui3 Migration Guide: Migrate Vstest To Mtp (microsoft/testfx, 1k stars), Migrate Vstest To Mtp (runceel/ReactiveProperty, 944 stars), Migrate Core Code to Submodules (tinyhumansai/openhuman, 41k stars) and Migrate Internal Package into Ghost (TryGhost/Ghost, 55k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Winui3 Migration Guide?

github (a GitHub organization, an official publisher) maintains it in github/awesome-copilot, which has 39,748 GitHub stars. The repository holds 417 skills in this directory. The repository was last updated on October 7, 2026.

Source: github/awesome-copilot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Winui3 Migration Guide

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

WinUI 3 Migration Guide

Namespace Changes

Top 3 Most Common Copilot Mistakes

1. ContentDialog Without XamlRoot

2. MessageDialog Instead of ContentDialog

3. CoreDispatcher Instead of DispatcherQueue

Windowing Migration

Window Reference

Window Management

Title Bar

Dialogs and Pickers Migration

File/Folder Pickers

Threading Migration

Background Tasks Migration

App Settings Migration

GetForCurrentView() Replacements

Testing Migration

Migration Checklist

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