Mermaid Skill Use this skill to quickly validate Mermaid diagrams by parsing + rendering them with the official Mermaid CLI. Prerequisites - Node.js + npm (for ). - First run downloads a headless Chromium via Puppeteer. If Chromium is missing, set . Tool Validate a diagram - Parses and renders the Mermaid source. - Non-zero exit = invalid Mermaid syntax. - Prints an ASCII preview using (best-effort; not all diagram types are supported). - If is omitted, the SVG is rendered to a temp file and discarded. Workflow (short) 1. If the diagram will live in Markdown : draft it in a standalone first (…