csharp-lsp

A Claude Code plugin providing comprehensive C# development support through:

• OmniSharp LSP integration for IDE-like features
• 12 automated hooks for .NET builds, linting, formatting, and testing
• .NET ecosystem integration (dotnet CLI, xUnit, NuGet)

Quick Setup

# Run the setup command (after installing the plugin)
/setup

Or manually:

# macOS (Homebrew)
brew install omnisharp
# or
dotnet tool install --global csharp-ls

Features

LSP Integration

The plugin configures OmniSharp for Claude Code via .lsp.json:

{
    "csharp": {
        "command": "omnisharp",
        "args": ["-lsp"],
        "extensionToLanguage": { ".cs": "csharp" },
        "transport": "stdio"
    }
}

Capabilities:

• Go to definition / references / implementation
• Hover documentation
• NuGet package completion
• .NET solution navigation
• Real-time diagnostics

Automated Hooks

Hook	Trigger	Description
csharp-format-on-edit	**/*.cs	Auto-format with dotnet format
csharp-build-check	**/*.cs	Build with dotnet build
csharp-todo-fixme	**/*.cs	Surface TODO/FIXME comments
csharp-null-check	**/*.cs	Detect null-forgiving operators

Required Tools

Tool	Installation	Purpose
omnisharp	brew install omnisharp	LSP server
dotnet	dotnet.microsoft.com	.NET SDK

Project Structure

csharp-lsp/
├── .claude-plugin/
│   └── plugin.json           # Plugin metadata
├── .lsp.json                  # OmniSharp configuration
├── commands/
│   └── setup.md              # /setup command
├── hooks/
│   └── scripts/
│       └── csharp-hooks.sh
├── tests/
│   └── SampleTest.cs         # Test file
├── CLAUDE.md                  # Project instructions
└── README.md                  # This file

License

MIT