mermaid-diagrams

1# Mermaid Diagramming
2 
3Create 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.
4 
5## Core Syntax Structure
6 
7All Mermaid diagrams follow this pattern:
8 
9```mermaid
10diagramType
11  definition content
12```
13 
14**Key principles:**
15- First line declares diagram type (e.g., `classDiagram`, `sequenceDiagram`, `flowchart`)
16- Use `%%` for comments
17- Line breaks and indentation improve readability but aren't required
18- Unknown words break diagrams; parameters fail silently
19 
20## Diagram Type Selection Guide
21 
22**Choose the right diagram type:**
23 
241. **Class Diagrams** - Domain modeling, OOP design, entity relationships
25   - Domain-driven design documentation
26   - Object-oriented class structures
27   - Entity relationships and dependencies
28 
292. **Sequence Diagrams** - Temporal interactions, message flows
30   - API request/response flows
31   - User authentication flows
32   - System component interactions
33   - Method call sequences
34 
353. **Flowcharts** - Processes, algorithms, decision trees
36   - User journeys and workflows
37   - Business processes
38   - Algorithm logic
39   - Deployment pipelines
40 
414. **Entity Relationship Diagrams (ERD)** - Database schemas
42   - Table relationships
43   - Data modeling
44   - Schema design
45 
465. **C4 Diagrams** - Software architecture at multiple levels
47   - System Context (systems and users)
48…