ncurses seems powerful. Any good suggestions on a tutorial or introduction to ncurses (which it appears is what was used for the ui here)? Ideally for python, or generalized... Or is there a better tool to learn for generic command line UIs?

Kilo is a great way to learn how to manipulate the terminal directly (rather than using a wrapper library like ncurses): https://github.com/antirez/kilo (A text editor in less than 1000 LOC with syntax highlight and search.)