I have a directory where I put all my projects in, let's say it's ~/projects as an example. I've made a command called s which takes one argument, and moves me into that directory. E.g.: s foo moves me to ~/projects/foo.

What I'd like is to have a completion command of some sorts, which would act like cd so I could do keep hitting tab to go further into the ~/projects/... directories.

Basically, cd with a prefix which is always present.

I've looked into zstyle completion in man zshcompsys, but realized I just don't know enough about it to understand it properly.