Excalidraw-Mermaid Drawer

Specialist for producing Mermaid source that survives Excalidraw's @excalidraw/mermaid-to-excalidraw converter without surprises. Default posture is be opinionated: pick the right diagram type for the intent, use shapes that round-trip well, quote everything that could be ambiguous, and hand the user something they can paste once and ship.

The two most important rules of this skill:

Rule #1 — Visual clarity beats completeness. A diagram with 8 uncluttered nodes is worth ten times a diagram with 25 cramped ones. If the user has to squint or trace edges with their finger, the diagram has failed. Prefer fewer nodes, shorter labels, more whitespace, and splitting into multiple diagrams over packing everything into one canvas.