Mermaid Diagrams

If you're documenting systems, modeling domains, or explaining architecture, this gives Claude the full Mermaid syntax reference to generate diagrams from text. It covers class diagrams for domain models, sequence diagrams for API flows, flowcharts for processes, ERDs for database schemas, and C4 diagrams for architecture. The detailed references walk through relationship types, cardinality notation, and styling options. Honestly, the main value is having all the syntax rules in one place so Claude doesn't hallucinate invalid Mermaid code. Works well when you need diagrams that live in version control alongside your code instead of rotting in some separate diagramming tool.