dotnet/roslynator ? reverse-engineered prompt

Build me a C# code analysis toolkit like Roslynator, with a set of helpful analyzers, refactorings, and code fixes for everyday cleanup in .NET projects.

I want it to feel useful in Visual Studio and VS Code, and also have a command line tool for running checks from the terminal. Please include the analyzer packages, basic support for testing analyzers and fixes, and a few solid starter rules and refactorings that make common C# code simpler and cleaner.

If you need to look up current Roslyn or .NET docs online while wiring it up, go ahead. Keep the experience friendly for someone who just wants to install it and immediately start improving C# code.