Define the key entities and their relationships in the application, in order to provide a high-level view of the problem domain.
Describe each model, its relationships (e.g.: one-to-many, many-to-many), and any custom attributes or methods.
Detail the structure of individual classes, their attributes, methods, and relationships.
Document the database schema, including tables, columns, data types, indexes, and relationships.
Keep migration files well-organized and include documentation on the purpose of each migration.