Looks awesome, thanks for sharing! I've been using Byoyu[0] which has a similar goal, but I'm keen on trying out. Even though I've been a long-time tmux user, as a developer I don't even know where I would start if I wanted to build my own terminal multiplexer. Can you share some resources etc on what could a good starting point if I want to explore this as a side-project?
[0] https://www.byobu.org/