[monkeycantype]

but it's solving one part of the problem, and doing a good job at it. I've been making diagrams using graphviz, but setting the positions and edge curves manually, pulling the nodes and edges out of a list in excel

https://github.com/mathew-j-davis/boxesandarrows

I've been setting the 'waypoints' for more complex curves (curves with many bends) manually (typing the bezier numbers in by hand), while I try and figure out how I want them routed, you're right it's not easy figuring out rules for where edge should go, let alone implementing it