mermaid-diagrams

# Mermaid Diagramming

Create professional software diagrams using Mermaid's text-based syntax. Mermaid renders diagrams from simple text definitions, making diagrams version-controllable, easy to update, and maintainable alongside code.

## Core Syntax Structure

All Mermaid diagrams follow this pattern:

```mermaid
diagramType
  definition content
```

**Key principles:**
- First line declares diagram type (e.g., `classDiagram`, `sequenceDiagram`, `flowchart`)
- Use `%%` for comments
- Line breaks and indentation improve readability but aren't required
- Unknown words break diagrams; parameters fail silently

## Diagram Type Selection Guide

**Choose the right diagram type:**

1. **Class Diagrams** - Domain modeling, OOP design, entity relationships
   - Domain-driven design documentation
   - Object-oriented class structures
   - Entity relationships and dependencies

2. **Sequence Diagrams** - Temporal interactions, message flows
   - API request/response flows
   - User authentication flows
   - System component interactions
   - Method call sequences

3. **Flowcharts** - Processes, algorithms, decision trees
   - User journeys and workflows
   - Business processes
   - Algorithm logic
   - Deployment pipelines

4. **Entity Relationship Diagrams (ERD)** - Database schemas
   - Table relationships
   - Data modeling
   - Schema design

5. **C4 Diagrams** - Software architecture at multiple levels
   - System Context (systems and users)
   - Container (applications, databases, services)
   - Component (internal structure)
   - Code (class/interface level)

6. **State Diagrams** - State machines, lifecycle states
7. **Git Graphs** - Version control branching strategies
8. **Gantt Charts** - Project timelines, scheduling
9. **Pie/Bar Charts** - Data visualization

## Quick Start Examples

### Class Diagram (Domain Model)
```mermaid
classDiagram
    Title -- Genre
    Title *-- Season
    Title *-- Review
    User --> Review : creates

    class Title {
        +str