Clean architecture tutorial turns simple tags into slug-generating overlords, because crud apps need philosophy

In the context of Clean Architecture in.NET 10, the Domain layer plays a crucial role in encoding business rules that exist independently of computer systems. A recent article highlights the importance of creating entities with real behavior, rather than mere data containers. The article provides examples of value objects, such as a Tag class, which earns its place by providing validation and behavior, including auto-generating a slug. The Domain layer should focus on business rules, such as "a prompt must have a title," rather than infrastructure concerns like database columns. The article also discusses the tradeoffs between using enums and value objects for model types, and the importance of storing IDs rather than full entities in many-to-many relationships. By keeping the Domain layer pure and focused on business logic, developers can create more maintainable and scalable systems, as demonstrated in the PromptVault project on GitHub.