This skill should be used when the user asks to "extract Mermaid diagrams", "convert Mermaid to PNG", "generate Mermaid images", "create flowchart", "draw diagram", "设置主题", "change theme", "生成流程图", "转换图表", or mentions working with Mermaid code blocks in markdown files. Bundled scripts extract diagrams from markdown and generate high-quality PNG/SVG images with smart sizing and theme support.