You used FSD — who designed the domain areas? Were they just new folder names or a deeper architectural approach? What was inside the entities folder?

In the Feature-Sliced Design (FSD) approach, domain areas are designed not just as new folders with arbitrary names, but as separate functional slices of the application that reflect business logic and responsibility. Each domain area is a standalone module with clearly defined boundaries.

Inside the entities folder, domain entities are usually located — data models that describe key objects of the subject area. These can be classes, interfaces, or types that describe the data structure, business logic, and validation rules. Entities serve as the basis for data interaction and are used in other layers, such as services or UI.

Thus, FSD is not just a renaming of folders, but an architectural approach that helps structure the project according to business logic, improving scalability and maintainability of the code.