BLOCKWERK
◢ CATALOG / solution architecture

Entity-Relationship Diagram

PRO

Model your data as a clean ERD with keys and cardinality.

Produce an Entity-Relationship Diagram (ERD) from a described data model — entities, attributes, primary/foreign keys, and relationships with crow's-foot cardinality — as editable Mermaid source, following disciplined layout. Use when asked to model data, draw an ERD, design a schema, or show tables and their relationships.

Ask for it in plain English, e.g.

“draw an ERD”“entity relationship diagram”“model this data”“design a schema”

Works in

AGENTS.mdClaudeGitHub CopilotCursorOllamaOpenAI GPTs
◢◢ EXAMPLE OUTPUT

You ask: Draw an ERD for a simple booking system: Customers make Bookings; each Booking is for one Room on a set of Dates; a Room belongs to a Property; a Property has many Rooms. Customers can review Properties they've booked. Show keys and cardinality.

Example output from the Entity-Relationship Diagram skill

Example output shown for illustration. Your assistant produces this live from your own request once the skill is installed.