Create, edit, validate, and preview Mermaid diagrams using the Mermaid Chart VS Code extension. Covers the validate-then-preview workflow, the LM tools (mermaid-diagram-validator, mermaid-diagram-preview, get-syntax-docs-mermaid), the mermaidChart.* commands, @mermaid-chart slash commands, and the Mermaid Chart cloud sync flow. Load whenever a task involves producing a flowchart, sequence, ER, class, state, C4, architecture, or any other diagram.
