EF Core D2 Database Diagram Generator

When to Use

Use this skill when the user wants to generate a database / ERD diagram from an Entity Framework Core codebase.

Typical requests:

• Generate a D2 database diagram from EF Core entities.
• Visualize tables, columns, primary keys, foreign keys and relationships.
• Analyze DbContext, DbSet<T>, IEntityTypeConfiguration<T>, Fluent API and migrations.
• Produce a .d2 file renderable to SVG/PNG with the d2 CLI.
• Document the database model of an ASP.NET Core / .NET project.

Goal

Create a readable D2 entity-relationship diagram that reflects the actual EF Core persistence model, not only the raw C# class shape.

The diagram must prioritize: