Monodraw has an understanding of objects in an ascii drawing. For example, you can select a box and edit the properties of it, or easily move just the box and not boxes within it.

Essentially it's a full flowchart editor that just outputs ascii.

It works.

At least ASCII flow is very very buggy on my Mac. And I’ve attempted with many web browsers.

That said, I’m hopeful that it improves its usability and it’s pretty awesome that it is open source and can be run locally which reminds me of hastebin.