dotnet-api-architecture

Use when adding, moving, renaming, or registering files, folders, or projects in a .NET solution shaped Api → Service → Repository → Entity → Common (+ Dto), or when asked where a type goes or what to call it: placement, one type per file (Models/, Exceptions/ subfolders), type and DI names, options and validators, services over provider-owned persistence (no repositories), and the test layout.