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
- Type
/plugin to open the plugin manager
- Press Tab to navigate to the Marketplaces tab
- Select Add Marketplace and press Enter
- Enter the path:
JeongHeonK/c-sharp-custom-marketplace
- 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
