SKILL.md
Database Schema Documentation
Table of Contents
- [Overview](#overview)
- [When to Use](#when-to-use)
- [Quick Start](#quick-start)
- [Reference Guides](#reference-guides)
- [Best Practices](#best-practices)
Overview
Create comprehensive database schema documentation including entity relationship diagrams (ERD), table definitions, indexes, constraints, and data dictionaries.
When to Use
- Database schema documentation
- ERD (Entity Relationship Diagrams)
- Data dictionary creation
- Table relationship documentation
- Index and constraint documentation
- Migration documentation
- Database design specs
Quick Start
Minimal working example:
# Database Schema Documentation
**Database:** PostgreSQL 14.x
**Version:** 2.0
**Last Updated:** 2025-01-15
**Schema Version:** 20250115120000
## Overview
This database supports an e-commerce application with user management, product catalog, orders, and payment processing.
## Entity Relationship Diagram
erDiagram
users ||--o{ orders : places
users ||--o{ addresses : has
users ||--o{ payment_methods : has
orders ||--|{ order_items : contains
orders ||--|| payments : has
products ||--o{ order_items : includes
products }o--|| categories : belongs_to
products ||--o{ product_images : has
products ||--o{ inventory : tracks
// ... (see reference guides for full implementation)
## Reference Guides
Detailed implementations in the `references/` directory:
| Guide | Contents |
|---|---|
| [users](references/users.md) | users |
| [products](references/products.md) | products |
| [orders](references/orders.md) | orders |
| [order_items](references/orderitems.md) | order_items |
| [Enum Types](references/enum-types.md) | Enum Types, JSONB Structures |
## Best Practices
### ✅ DO
- Document all tables and columns
- Create ERD diagrams
- Document indexes and constraints
- Include sample data
- Document foreign key relationships
- Show JSONB field structures
- Document triggers and functions
- Include migration scripts
- Specify data types precisely
- Document performance considerations
### ❌ DON'T
- Skip constraint documentation
- Forget to version schema changes
- Ignore performance implications
- Skip index documentation
- Forget to document enum values