Your visualizer looks great! I really like that it queues up tasks to run instead of only operating on the code during runtime attachment. I haven't seen that kind of thing before.

I built my own node graph utility to do this for my code, after using Unreal's blueprints for the first time. Once it clicked for me that the two are different views of the same codebase, I was in love. It's so much easier for me to reason about node graphs, and so much easier for me to write code as plain text (with an IDE/language server). I share your wish that there were a more general utility for it, so I could use it for languages other than js/ts.

Anyway, great job on this!