How does Database First work in modern EF Core (Scaffolding)?

Database First is accomplished via reverse engineering an existing database schema into EF Core DbContext and entity classes using CLI tools.

The command dotnet ef dbcontext scaffold reads the schema (tables, foreign keys, indexes) and generates the corresponding C# code using Fluent API or Data Annotations. To keep models updated when the DB changes, the command must be re-run (often with the --force flag), which will overwrite the generated files.