Comment by sshine

Mind blown.

This is so simple.

It’s like rlwrap, but generic. So you could reimplement rlwrap with this.

I’ve been experimenting with schemesh recently. It’s a shell with ask control structures in scheme. Amazing, but a little immature still. Having a scheme middleware would be stronger: I can have a full zsh where a control key drops me onto a Scheme interpreter.

Now, how far up your process tree do you want to host it?