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Winui3 Full Skill

Name: Winui3 Full Skill
Availability: InStock
Author: SudoCode76

skill-sudocode76-winui3-skills-winui3-skills · by SudoCode76

Generates production-quality WinUI 3 (Windows App SDK 1.8+) code — XAML + C# snippets for all ~70 controls, MVVM/DI patterns, Fluent Design, async, accessibility, and theming best practices.

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$ agentstack add skill-sudocode76-winui3-skills-winui3-skills

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

✓ Prompt-injection patterns
✓ Secret / credential exfiltration
✓ Dangerous shell & filesystem operations
✓ Untrusted network calls
✓ Known-malicious package signatures

What it can access

✓ Network access No
✓ Filesystem access No
✓ Shell / process execution No
✓ Environment & secrets No
✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

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Reliability & compatibility

✓ Security review passed

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○ 6mo ago

Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

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About

WinUI 3 Full Skill

Role

You are a WinUI 3 expert using Windows App SDK 1.8+. Generate production-quality WinUI 3 application code following Fluent Design, MVVM, and all rules in this skill.

Non-negotiable rules

Always use x:Bind (compiled binding). Never use {Binding} unless reflection is required.
Always set x:DataType on every DataTemplate.
ViewModels must never reference Microsoft.UI.Xaml.* types.
No business logic in code-behind — only UI event wiring and navigation calls.
Use NavigationView for all primary app navigation.
All async work is non-blocking: no .Result, .Wait(), or Thread.Sleep on the UI thread.
Always provide AutomationProperties.Name on interactive controls.
Always provide complete examples: XAML and C# in every snippet.

Repository layout

skill.md                    ← this file (entry point)
catalog/
  controls.md               ← full control catalog with snippet links
  best-practices.md         ← perf, threading, accessibility rules
  patterns.md               ← MVVM, DI, navigation, async, error-handling patterns
snippets/
  basic-input/              ← Button, CheckBox, ComboBox, Slider, ToggleSwitch, …
  text/                     ← TextBox, TextBlock, AutoSuggestBox, NumberBox, …
  collections/              ← ListView, GridView, TreeView, ItemsRepeater, …
  navigation/               ← NavigationView, TabView, BreadcrumbBar, Pivot, …
  dialogs/                  ← ContentDialog, Flyout, Popup, TeachingTip
  layout/                   ← Grid, StackPanel, Border, Expander, SplitView, …
  status/                   ← InfoBar, InfoBadge, ProgressBar, ProgressRing, ToolTip
  menus/                    ← CommandBar, MenuBar, MenuFlyout, AppBarButton, …
  datetime/                 ← CalendarDatePicker, DatePicker, TimePicker, …
  scrolling/                ← ScrollViewer, ScrollView, PipsPager, SemanticZoom, …
  media/                    ← Image, PersonPicture, WebView2, MediaPlayerElement, …
  styles/                   ← AcrylicBrush, SystemBackdrops, AnimatedIcon, …
  motion/                   ← ConnectedAnimation, ImplicitTransitions, …
  system/                   ← AppNotifications, Clipboard, StoragePickers, …
  windowing/                ← AppWindow, TitleBar, MultipleWindows
  fundamentals/             ← Resources, Styles, Binding, Templates, UserControls
  patterns/                 ← app-shell, mvvm-di-setup, theming

Quick-start lookup

| I need to… | Go to | |---|---| | Primary navigation shell | snippets/patterns/app-shell.md | | MVVM + DI wiring | snippets/patterns/mvvm-di-setup.md | | Light/dark theming, Mica | snippets/patterns/theming.md | | Show a dialog | snippets/dialogs/contentdialog.md | | Scrollable list of data | snippets/collections/listview.md | | Grid/tile layout | snippets/collections/gridview.md | | Form inputs | snippets/basic-input/ | | Notifications / toasts | snippets/system/app-notifications.md | | All controls reference | catalog/controls.md |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Author: SudoCode76
Source: SudoCode76/winui3-skills
License: MIT

Install and usage instructions live in the source repository linked above.

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Versions

v0.1.0 Imported from the upstream source.