nbpreview VS textual

I haven't personally tried it but this project uses it with rich.

If you are looking for something more flexible that just printing to a terminal, take a look at Asciimatics and textual. Both are available from Pypi.

As someone that use both Python and Rust, it's hard to motivate myself to write TUI in Rust, because with Python we have the amazing textual.

I would also[0] be interested in an argparse equivalent of this for my tool Library[1]

[0] https://github.com/Textualize/textual/discussions/228

[1] https://github.com/chapmanjacobd/library

Today I released coBib 4.0, my console bibliography manager written in Python, which now uses rich and textual to provide a cohesive and modern user experience in both its CLI and TUI.

I don't think it is exactly what you're looking for, but Textual will be supporting something close to what I think you're after, soon. https://github.com/Textualize/textual

For Golang there is Bubbletea [1], Textual [2] for Python and tui-rs for Rust [3].

[1] https://github.com/charmbracelet/bubbletea

[2] https://github.com/textualize/textual

[3] https://github.com/fdehau/tui-rs

I guess you looked at it a while ago because the docs are quite detailed with lots of examples.

There are plenty of terminal UI libraries that are actually nice to work with. For Python, there's Textual and PyTermGUI. For Rust, there's ratatui and Cursive (or, if you want something a bit lower level, crosster or termion). For Go, there's bubbletea.

Concerning your roadmap, you might wanna take some inspiration from Textual, it's a really mordern approach to TUIs. I understand that the level of abstraction is high and might be tasking to implement many of the ideas in there in C... and please fgs, don't think about doing the CSS shit.