# Er Diagram And Data Modeling

> [STUB - Not implemented] Entity-relationship diagrams and data modeling for database schema design. PROACTIVELY activate for: [TODO: Define on implementation]. Triggers: [TODO: Define on implementation]

- Skill: `majiayu000/er-diagram-and-data-modeling` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add majiayu000/er-diagram-and-data-modeling`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/er-diagram-and-data-modeling/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/er-diagram-and-data-modeling

---


# ER Diagram and Data Modeling

> **STUB: This skill is not yet implemented**
>
> This placeholder preserves the documented plugin structure.
> See parent plugin README for planned capabilities.

## Planned Capabilities

- Entity-relationship diagram generation
- Cardinality and relationship notation
- Primary/foreign key identification
- Normalization analysis (1NF, 2NF, 3NF)
- Index recommendation
- Schema migration planning

## Mermaid ER Syntax

```mermaid
erDiagram
    USER ||--o{ POST : creates
    USER {
        uuid id PK
        string email
        timestamp created_at
    }
    POST {
        uuid id PK
        uuid author_id FK
        string title
        text content
    }
```

## Implementation Status

- [ ] Core implementation
- [ ] References documentation
- [ ] Output templates
- [ ] Integration tests