c-sharp-marketplace

C# Marketplace Plugin

한국어

A Claude Code plugin for C# and WPF development. Provides code review/refactoring/MVVM generation skills focused on Modern C# 12/13, OOP principles, SOLID principles, and GoF design patterns.

Key Features

Skills

Skill	Description
csharp-code-review	OOP/SOLID/GoF + Performance/Security/Async code review
csharp-refactor	Apply SOLID principles, introduce design patterns, convert to Modern C# syntax
wpf-mvvm-generator	Generate ViewModel/View/Model based on CommunityToolkit.Mvvm
csharp-best-practices	C# 12/.NET 8 coding guidelines knowledge-base (12 rules, 3-tier architecture inspired by vercel-react-best-practices)
csharp-tdd-develop	TDD-based C# development (Red-Green-Refactor workflow)
csharp-test-develop	Write test code for existing C# classes
project-setup	Initialize C#/.NET project for Claude Code (CLAUDE.md + context hooks for Bash/PowerShell) — based on agents.md outperforms skills

MCP Servers

Server	Description
Context7	.NET, WPF, NuGet official documentation search

Supported Features

Modern C# Features (C# 12/13)

• Primary constructors
• Collection expressions [1, 2, 3]
• required / init properties
• Pattern matching
• Record types
• params collections (C# 13)
• System.Threading.Lock (C# 13)

CommunityToolkit.Mvvm

• [ObservableProperty] Source Generator
• [RelayCommand] / [AsyncRelayCommand]
• WeakReferenceMessenger Pub/Sub
• Dependency Injection Integration

Code Review Checklist

• OOP four pillars
• SOLID principles
• GoF design pattern opportunities
• Modern C# feature utilization
• Performance (memory allocation, Span, Memory, LOH)
• Async/Await patterns
• Security (SQL Injection, XSS, etc.)

Installation

Method 1: Install via npx (Recommended)

# Install all skills (global — enables `npx skills update`)
npx skills add JeongHeonK/c-sharp-custom-marketplace -g

# Install specific skills only (global)
npx skills add JeongHeonK/c-sharp-custom-marketplace --skill csharp-code-review -g
npx skills add JeongHeonK/c-sharp-custom-marketplace --skill csharp-refactor wpf-mvvm-generator -g

# Install to project scope (does NOT support `npx skills update`)
npx skills add JeongHeonK/c-sharp-custom-marketplace

Note: npx skills update only tracks globally installed skills (-g flag). Project-scoped skills must be updated by re-running npx skills add.

Method 2: Install via Claude Code UI

1. Type /plugin to open the plugin manager
2. Press Tab to navigate to the Marketplaces tab
3. Select Add Marketplace and press Enter
4. Enter the path: JeongHeonK/c-sharp-custom-marketplace
5. Select desired skills from the Discover tab to install

Installation Scope

When installing via the /plugin UI, you can choose the scope:

• User scope: Available across all projects (default)
• Project scope: Available to all collaborators in the repository
• Local scope: Available only to you in the repository

Plugin Structure

c-sharp-marketplace/
├── .claude-plugin/
│   ├── plugin.json          # Plugin metadata
│   └── marketplace.json     # Marketplace manifest
├── skills/
│   ├── csharp-best-practices/
│   │   ├── SKILL.md         # Best practices guideline skill
│   │   └── rules/           # 12 guideline rule files
│   ├── csharp-code-review/
│   │   └── SKILL.md         # Code review skill
│   ├── csharp-refactor/
│   │   └── SKILL.md         # Refactoring skill
│   ├── csharp-tdd-develop/
│   │   ├── SKILL.md         # TDD workflow orchestrator
│   │   └── scripts/
│   │       └── test-detector.js  # .csproj test env detection
│   ├── csharp-test-develop/
│   │   ├── SKILL.md         # Test code writing skill
│   │   └── references/
│   │       └── csharp-test-patterns.md  # C# test patterns guide
│   ├── project-setup/
│   │   ├── SKILL.md         # Project initialization skill
│   │   ├── scripts/
│   │   │   ├── setup.sh     # Hook setup (Bash)
│   │   │   └── setup.ps1    # Hook setup (PowerShell)
│   │   ├── references/
│   │   │   └── claude-md-template.md  # CLAUDE.md generation template
│   │   └── assets/hooks/    # Hook scripts (.sh + .ps1)
│   └── wpf-mvvm-generator/
│       └── SKILL.md         # MVVM generation skill
├── .mcp.json                # MCP server configuration
├── CLAUDE.md                # Project conventions
└── README.md