I use excalidraw, even upgraded to pro out of my own pocket. It's not git-compatible in the sense that it's not text (though you can export to SVG and commit that, which I've done). But I love that it has the feel of an approximation or just a quick sketch rather than a formal promise of how a system works.

When I've used dot or mermaid to build diagrams I've always found it hard to specify layout, colours and sizes, which I use to emphasise different views on a system. I'd love some sort of middle ground where I get the benefits of version control but also the sketch-like character of excalidraw

can it automatically re-flow flowchart layouts?