Back in the 90s Apple had MPW (a command line development environment) and AUX (its own UNIX implementation for 680x0 Mac hardware). Both featured Commando (type a command followed by an ellipsis and hit ENTER and visual dialog would appear letting you condfigure the command). When you clicked OK (or hit return) the resulting command would be typed into your window.

MPW also allowed you to differentiate between target and command windows very easily, so you could keep your favorite commands handy and have the output funneled to other views.

Not Lighttable, but a lot more useful than man pages in 99% of cases and pretty darn nice.