Came here to add this as well.

tmux is probably my favourite tool by far. I highly suggest going through its documentation (even easier with LLMs now) to learn the basics. It's extremely scriptable.

One of favourite uses of it is its 'popup' feature. Combining the tmux popup with fzf creates a crazy opportunity of whats possible.

Highly suggest learning these tools; literally just point an agent at my comment here and ask it what one could do with tmux popup and fzf combined