A Mermaid Validation Skill for Claude Code - AI coding agents generate significantly more markdown documentation than we used to write manually. This creates opportunities to explain concepts visually with mermaid diagrams - flowcharts, sequence diagrams, and other visualizations defined in text. When Claude generates these diagrams, the syntax can be invalid even though the code looks correct. Claude Code skills provide a way to teach Claude domain-specific workflows - in this case, validating diagrams before marking the work complete.

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