---
description: When drawing a diagram in Draw.io or Mermaid check if it looks OK to human eye.
alwaysApply: false
---
Render and review as a human would: zoom to ~50% and scan for clarity.

**Layout:** no overlapping shapes; consistent spacing/grid; readable text size and contrast; legend if symbols/colors need explanation.

**Flow:** obvious direction; minimize crossing lines; stagger parallel edges; separate error/retry paths from happy path; decision diamonds readable (clear branches).

**Hierarchy:** group related shapes; similar nodes similar size; primary journey visually strongest.

**Before sign-off:** zoom-out test; “fresh eyes” readability; print/B&W sanity; trace each arrow without ambiguity.
