Backend Models

Define and structure database models with proper data types, relationships, constraints, and validation following ORM best practices. Use this skill when creating or modifying database model classes, ORM entities, schema definitions, or data model files. Use this skill when working with SQLAlchemy models, Django models, ActiveRecord models, Prisma schemas, TypeORM entities, or Sequelize models. Use this skill when defining table schemas, establishing relationships (one-to-many, many-to-many), implementing model validation, adding timestamps and soft deletes, or configuring cascade behaviors. Use this skill when working with files in models/, entities/, schemas/, or orm/ directories that define database table structures and business logic.