<!-- PM-Skills | https://github.com/product-on-purpose/pm-skills | Apache 2.0 -- Mermaid Diagrams Create effective, syntactically valid mermaid diagrams for product documents. When to Use - Creating mermaid diagrams for PRDs, specs, roadmaps, or stakeholder presentations - Choosing which of 15 diagram types fits a specific communication need - Debugging mermaid code that won't render or renders incorrectly - Reviewing diagrams for clarity, accuracy, and accessibility When NOT to Use - Exporting diagrams to image files (PNG/SVG) - that's a rendering tool concern - Using non-mermaid diagramming…