> I'm actually confused about why they'd go to the effort of implementing a VT100 emulator, write the code to redraw the screen from it

Well, we kinda cheated here. shpool_vt100 is just the already existing vt100 crate with a single critical bug fixed, so it actually wasn't much work :). Turns out having a nice package manager for a systems language comes with some benefits.

I'm actually open to adding a feature to allow multiple simultaneous connections to a single session. I never really had a usecase for it personally so I haven't prioritized it, but it is something that similar tools support and people keep bringing up. Since this isn't the first time I've heard people talking about it, I just made https://github.com/shell-pool/shpool/issues/40 to track work adding the ability to attach multiple clients to the same session.

> This feels like it sits in a weird place between simple, crude tools like dtach, and tools like tmux; shpool has done most of the work to implement tmux-style behavior, and then decides to cut weird corners.

I'm not aware of any tool that does internal rendering and subsetting handling scrollback and copy-paste in a way that I personally find usable, so these decisions were very much intentional.

I think tmux is a great tool for a lot of people, and I tried to get into it for years, but I could just never get over the weird scrollback and copy-paste issues or the fact that it meant that I couldn't use my normal `i3`/`sway` bindings to switch between terminals inside a tmux session. If tmux works for someone, I think that's great and they should keep using it. shpool is meant for people like me who aren't very good with computers :).