Entity Relationship Diagramv1.0.0

A backend engineer needs to model users, orders, line items, products, and payments before writing migrations for a new marketplace. The skill produces a Mermaid ER diagram with crow's-foot cardinality, PK/FK markings, and notes on resolving the order-product many-to-many through line items. This lets the team review the schema visually in a PR before any SQL is written.

A startup CTO must show how organizations, users, subscriptions, and invoices relate for a B2B SaaS product with role-based access. The skill generates an ER diagram clarifying tenant boundaries, one-to-many relationships, and a join table for user-role assignments. It doubles as onboarding documentation for new engineers.

A health-tech team is designing a system where patients have appointments, prescriptions, and provider assignments. The skill turns this domain description into a Mermaid ER diagram with explicit cardinality and sensible attribute types (uuid keys, datetime fields), flagging where normalization matters for compliance-sensitive data.

An ed-tech developer needs to model students, courses, enrollments, and instructors for a learning platform. The skill resolves the student-course many-to-many with an enrollment join entity and marks foreign keys, producing a renderable diagram the team can paste into internal docs.

An engineer at a payments company is mapping accounts, transactions, and transfers before building a double-entry ledger. The skill outputs an ER diagram showing how a transfer relates to two account entries, with PK/FK attributes and design notes on indexes for high-volume lookups.

Offer the ER diagram skill free within a broader AI agent marketplace, then charge for advanced features like schema export to SQL DDL, version history, or team collaboration on data models. The free tier drives adoption among individual developers who later convert their teams.

Bundle the skill into a data-governance platform sold to enterprises that need standardized, reviewable data models across many teams. Customers pay for private deployment, compliance-aware templates, and integration with existing data catalogs and CI pipelines.

Expose the skill as a metered REST API that CI tools, migration generators, and documentation platforms call to convert domain descriptions into Mermaid ER diagrams programmatically. Usage-based pricing suits teams that generate many diagrams per month across repos.