原始内容
C# Marketplace Plugin
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]WeakReferenceMessengerPub/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 updateonly tracks globally installed skills (-gflag). Project-scoped skills must be updated by re-runningnpx skills add.
Method 2: Install via Claude Code UI
- Type
/pluginto 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
Note: After installing the plugin, the
skills/directory is automatically recognized, enabling slash commands (/skill-name). (Claude Code 2.1.3+)
Usage
Skills
Code Review
/csharp-code-review
/csharp-code-review src/Services/UserService.cs
Code Refactoring
/csharp-refactor # Full analysis
/csharp-refactor src/Services/UserService.cs # Specific file
/csharp-refactor src/Services/UserService.cs solid # SOLID refactoring only
/csharp-refactor src/Services/UserService.cs modern # Modern C# syntax conversion
Best Practices Guidelines
/csharp-best-practices # Show all rules
/csharp-best-practices primary-constructor # Specific topic
/csharp-best-practices record # Record types guide
TDD Development
/csharp-tdd-develop UserService # TDD workflow for UserService
/csharp-tdd-develop 주문 처리 서비스 # TDD workflow for order service
Test Code Writing
/csharp-test-develop src/Services/UserService.cs # Write tests for file
/csharp-test-develop OrderService # Find and write tests for class
MVVM Code Generation
/wpf-mvvm-generator User # Generate full MVVM for User
/wpf-mvvm-generator Product viewmodel # Generate ProductViewModel only
/wpf-mvvm-generator Order view # Generate OrderView only
Project Setup
/project-setup # Initialize current project
/project-setup init /path/to/project # Initialize specific project
/project-setup migrate # Add sections to existing CLAUDE.md
/project-setup hooks # Install hook scripts only
MCP Server (Context7)
Add "use context7" to your prompt for documentation search:
"Show me how to use IAsyncEnumerable in C# use context7"
"CommunityToolkit.Mvvm ObservableProperty examples use context7"
".NET 8 Span<T> best practices use context7"
Code Principles
OOP Four Pillars
- Encapsulation
- Inheritance
- Polymorphism
- Abstraction
SOLID Principles
| Principle | Description |
|---|---|
| SRP | Single Responsibility Principle |
| OCP | Open/Closed Principle |
| LSP | Liskov Substitution Principle |
| ISP | Interface Segregation Principle |
| DIP | Dependency Inversion Principle |
GoF Design Patterns
Creational Patterns: Singleton, Factory Method, Abstract Factory, Builder, Prototype
Structural Patterns: Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy
Behavioral Patterns: Chain of Responsibility, Command, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor
Naming Conventions
| Type | Convention | Example |
|---|---|---|
| Classes, Methods, Properties | PascalCase | UserService, GetById |
| Local variables, Parameters | camelCase | userId, isActive |
| Private fields | _camelCase | _repository, _logger |
| Interfaces | I prefix | IRepository, IUserService |
| Async methods | Async suffix | GetByIdAsync |
Recommended Project Structure
/src
/Models - Domain models
/ViewModels - MVVM ViewModels (partial classes)
/Views - WPF XAML Views
/Services - Business services
/Repositories - Data access layer
/Messages - Messenger message types
/Converters - IValueConverter implementations
/Infrastructure - Common infrastructure
/tests
/UnitTests - Unit tests
/IntegrationTests - Integration tests
Requirements
- Claude Code CLI 2.1.3+ (required, supports symlinked skills)
- Node.js 18+ (for Context7 MCP server)
- .NET 8/9 SDK
- Visual Studio 2022 / JetBrains Rider
Changelog
v1.8.0 (2026-02-10)
Remove Custom Agents — npx skills Compatibility
Removed agents/ directory and switched to general-purpose sub-agent delegation for full npx skills add compatibility. Agent expertise is now provided via inline prompt context and existing rules/references.
| Change | Description |
|---|---|
| agents/ (Removed) | Removed csharp-expert.md, wpf-expert.md, AGENTS.md |
| csharp-tdd-develop (Updated) | Switched to general-purpose sub-agent; added C# expert context to Task prompts |
| csharp-test-develop (Updated) | Same changes as csharp-tdd-develop |
| CLAUDE.md (Updated) | 3-tier → 2-tier architecture documentation |
v1.7.0 (2026-02-06)
Skills Localization & Quality Improvements
Converted all user-facing skill outputs to Korean and improved skill quality based on systematic audit.
| Change | Description |
|---|---|
| csharp-code-review (Updated) | SKILL.md body localized to Korean; output format template fully translated; technical term consistency enforced |
| csharp-refactor (Updated) | SKILL.md body localized to Korean; added C# version annotations to Modern syntax table; added TargetFramework detection; added error handling section |
| wpf-mvvm-generator (Updated) | SKILL.md body localized to Korean; clarified all option generates 6 component types; added entity name validation; added error handling section; improved project structure scanning with Glob patterns |
v1.6.1 (2026-02-03)
Inline Docs Index Pattern — Passive Context for CLAUDE.md
Applied a 2-tier "inline docs index" pattern to the CLAUDE.md template generated by project-setup. Key patterns from C# best practices, test patterns, and WPF/MVVM are now inlined as compact summaries in ## C#/.NET Quick Reference, enabling agents to leverage them as passive context every turn without explicit file reads. Detailed reference files are preserved in ## Detailed References for edge cases.
| Change | Description |
|---|---|
| claude-md-template.md (Updated) | Added ## C#/.NET Quick Reference (~140 lines of compact inline summaries); renamed file-path tables to ## Detailed References; added conditional sections for WPF, Test, and TargetFramework |
| project-setup/SKILL.md (Updated) | Extended Step 4 conditional section handling (4 conditions); added Quick Reference verification to Step 6 checklist; updated migrate subcommand |
| CLAUDE.md (Updated) | Updated Development Guidelines with Quick Reference + Detailed References maintenance instructions |
v1.5.0 (2025-01-30)
Plugin Modularization
Added new skills for best practices, TDD development, and test code writing. The csharp-best-practices skill follows the 3-tier architecture (SKILL.md + AGENTS.md + rules/) inspired by vercel-react-best-practices.
| Change | Description |
|---|---|
| csharp-best-practices (New) | C# 12/.NET 8 coding guidelines knowledge-base with 12 rule files (modeled after vercel-react-best-practices) |
| csharp-tdd-develop (New) | TDD Red-Green-Refactor workflow orchestrator |
| csharp-test-develop (New) | Test code writing skill for existing code (xUnit/Moq/FluentAssertions) |
| csharp-code-review (Updated) | Removed "Positive Aspects" section — issues only output |
v1.4.0 (2025-01-27)
Claude Code 2.1.x Compatibility Improvements
Updated documentation and structure in accordance with the integration of skills and slash commands in Claude Code 2.1.3+.
| Change | Description | Related Version |
|---|---|---|
| Skill slash commands | Direct invocation via /csharp-code-review, etc. |
v2.1.3 |
user-invocable setting |
Slash command menu visibility configuration | v2.1.3 |
| Documentation improvements | Clarified plugin structure and usage | - |
v1.3.0 (2025-01-24)
Claude Code 2.1.x Compatibility Update
This update reflects major changes from the Claude Code 2.0.x ~ 2.1.x release notes.
Skill Updates
| Item | Description | Related Version |
|---|---|---|
context: fork |
Execute in forked sub-agent context | v2.1.0 |
argument-hint |
Slash command argument hint display | v2.1.0 |
user-invocable |
Slash command menu visibility | v2.1.3 |
skills field |
Auto-load skills for sub-agents | v2.1.0 |
$ARGUMENTS[0] |
New argument access syntax (replaces $ARGUMENTS.0) |
v2.1.19 |
New Skills
- csharp-refactor: Apply SOLID principles, introduce design patterns, convert to Modern C# syntax
- wpf-mvvm-generator: Generate ViewModel/View/Model code based on CommunityToolkit.Mvvm
Other
- Added LSP tool support (go-to-definition, find-references, hover) - v2.0.74
- New Task Management System support - v2.1.16
v1.2.0
- Added marketplace.json for Marketplace distribution
- Improved plugin installation guide
v1.1.0
- Added Modern C# 12/13 feature support
- Added CommunityToolkit.Mvvm Source Generators guide
- Added Performance Review section (Span
, Memory , LOH) - Added Async Code Review checklist
- Added Security Review section
v1.0.0
- Initial release
- Code Review skill
- Context7 MCP server configuration
License
MIT