roslyn-mcp

# Roslyn Code Analysis MCP Server ## Overview A Model Context Protocol (MCP) server that provides C# code analysis capabilities using the Roslyn compiler platform. This tool helps validate C# files, find symbol references, and perform static code analysis within the context of a .NET project. ## Features - **Code Validation**: Analyze C# files for syntax errors, semantic issues, and compiler warnings - **Symbol Reference Finding**: Locate all usages of a symbol across a project - **Project Context Analysis**: Validate files within their project context - **Code Analyzer Support**: Run Microsoft recommended code analyzers ## Tools - `ValidateFile`: Validates a C# file using Roslyn and runs code analyzers - `FindUsages`: Finds all references to a symbol at a specified position ## Example config ```json { "servers": { "RoslynMCP": { "type": "stdio", "command": "dotnet", "args": [ "run", "--no-build", "--project", "E:/Source/roslyn-mcp/RoslynMCP/RoslynMCP/RoslynMCP.csproj" ] } } } ``` ## Example prompt ``` When done implementing changes, run these validation steps as human will not accept work unless these are done: - Always use Roslyn validation tool on C# (.cs) files ``` ## Getting Started 1. Build the project 2. Run the application with: ``` dotnet run ``` 3. The server will start and listen for MCP commands via standard I/O ## Requirements - .NET SDK - MSBuild tools - NuGet packages for Roslyn analyzers (automatically loaded if available) ## Example Usage Validate a C# file: ``` ValidateFile --filePath="/path/to/your/file.cs" --runAnalyzers=true ``` Find all usages of a symbol: ``` FindUsages --filePath="/path/to/your/file.cs" --line=10 --column=15 ``` ## Technical Details - Uses `Microsoft.CodeAnalysis` libraries for code analysis - Integrates with MSBuild to load full project context - Supports standard diagnostic analyzers - Includes detailed output with syntax, semantic, and analyzer diagnostics