windows-app-developer

Q: How do I install windows-app-developer?

Run npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill windows-app-developer in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/windows-app-developer/ (personal) or .claude/skills/windows-app-developer/ (project).

by 404kidwizFrontend & Design

Expert in building modern Windows applications using WinUI 3, WPF, and the Windows App SDK. Specializes in MSIX packaging, XAML styling, and MVVM architecture.

Installs: 140
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill windows-app-developer

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads windows-app-developer automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Windows App Developer

Purpose

Provides expertise in building modern Windows desktop applications using WinUI 3, WPF, and Windows App SDK. Specializes in XAML-based UI development, MVVM architecture, native Windows integration, and modern packaging with MSIX.

When to Use

Building Windows desktop applications with WinUI 3 or WPF
Implementing MVVM architecture for Windows apps
Creating XAML layouts and custom controls
Packaging applications with MSIX
Integrating with Windows features (notifications, taskbar, system tray)
Migrating WPF applications to WinUI 3
Implementing Windows-specific features (jump lists, live tiles)
Building Microsoft Store-ready applications

Quick Start

Invoke this skill when:

Building Windows desktop applications with WinUI 3 or WPF
Implementing MVVM architecture for Windows apps
Creating XAML layouts and custom controls
Packaging applications with MSIX
Integrating with Windows features (notifications, taskbar)

Do NOT invoke when:

Building cross-platform apps → use mobile-developer or electron-pro
Console applications → use appropriate language skill
PowerShell GUI → use powershell-ui-architect
Web applications → use appropriate web skill

Decision Framework

Windows App Task?
├── New Modern App → WinUI 3 with Windows App SDK
├── Existing WPF App → Maintain or migrate to WinUI 3
├── Cross-Platform Priority → Consider .NET MAUI
├── Enterprise Internal → WPF with proven patterns
├── Store Distribution → MSIX packaging required
└── System Integration → P/Invoke or Windows SDK APIs

Core Workflows

1. WinUI 3 Application Setup

Create project using Windows App SDK template
Configure Package.appxmanifest for capabilities
Set up MVVM infrastructure (CommunityToolkit.Mvvm)
Implement navigation and shell structure
Create reusable control library
Configure MSIX packaging
Set up CI/CD for Store or sideload distribution

2. MVVM Implementation

Define ViewModels with observable properties
Implement commands for user actions
Create services for data and business logic
Set up dependency injection container
Bind Views to ViewModels in XAML
Implement navigation service
Add design-time data for XAML preview

3. MSIX Packaging

Configure Package.appxmanifest
Define application identity and capabilities
Set up visual assets (icons, splash)
Configure installation behavior
Sign package with certificate
Test installation and updates
Submit to Microsoft Store or deploy internally

Best Practices

Use WinUI 3 for new development, WPF for legacy maintenance
Implement MVVM strictly for testability and separation
Use x:Bind for compile-time binding validation
Leverage Community Toolkit for common patterns
Package with MSIX for modern installation experience
Follow Fluent Design System for consistent UX

Anti-Patterns

Code-behind logic → Move to ViewModels
Synchronous UI operations → Use async/await for I/O
Direct service calls from Views → Go through ViewModels
Ignoring DPI awareness → Test at multiple scale factors
Missing capabilities → Declare required capabilities in manifest

FAQ

What does the windows-app-developer skill do?

Expert in building modern Windows applications using WinUI 3, WPF, and the Windows App SDK. Specializes in MSIX packaging, XAML styling, and MVVM architecture.

How do I install windows-app-developer?

Run npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill windows-app-developer in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/windows-app-developer/ (personal) or .claude/skills/windows-app-developer/ (project).

Which AI agents can use windows-app-developer?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is windows-app-developer safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains windows-app-developer?

It is published by 404kidwiz in 404kidwiz/claude-supercode-skills. It has 140 recorded installs.