[wormius]

Oh Sorry I don't know if there's more functionality - didn't mean to imply something like LightTable exists for it, but for some reason I thought it allowed you to step back and forward in the execution to watch things (still based in text, etc... I have SBCL on my system but never really played with it beyond "hello world" so have never actually used the full power of the REPL).

AFAIK it doesn't have any sort of extension like this though. But maybe someone with more CL experience can advise! Hopefully someone has a better idea for you :)

I see the stuff in the parent post but not sure exactly what it can do vs what I envision or you may be picturing...