@olets
Sure. Thank you! Any help is welcome, because a comprehensive manual is hard to find! I found an old some kind of guide on the wayback machine.
Current status: I have configured completions.zsh and now working on some kind of template.
https://codeberg.org/oxo/dotf/src/commit/e4c4cf69efad002c172d637f030d330d8f42ed5d/zsh/completions/completion.zsh
@oxo want pointers? I found it hard to get started but eventually figured out a minimal pattern that's covered most of my wants