LocalTax 是做什麼的?
How to build and maintain Vertical Slice Architecture in .NET — slice anatomy (single-file and folder variants), direct handler dispatch without a mediator, cross-cutting concerns, what slices may share, how slices interact with a domain model or Clean layers, and slice-level testing. Use when adding or modifying a use case/endpoint/feature in any module organized by vertical-slices, or when duplication between slices is discussed.