2022 update: This article has been trimmed somewhat, after some good feedback in the comments! What if….there was a decent, free, offline diagramming tool, that saves in a sensible text-based format (SVG), with an accompanying command-line interface, so you can easily generate bitmaps for sharing, unattended. Well, I finally discovered it. It’s diagrams.net (formerly draw.io)! I’d heard about the