Mermaid diagram syntax reference and validation. Use when writing, debugging, or converting Mermaid diagrams. Every diagram must pass mermaid.sh validate before output. Supports flowchart, sequenceDiagram, stateDiagram, classDiagram, gantt, erDiagram, pie, gitgraph, journey, mindmap, timeline, xychart, radar-beta, quadrantChart, sankey, block, architecture-beta, c4, packet, treemap-beta, venn-beta, wardley-beta, ishikawa-beta, kanban, requirementDiagram.
