[boibombeiro]

I hate how complex it to write a decent zsh completion. It is not something you can realistic do in a weekend.

You can implement a simple one without much effort. But doing anything a bit more interesting need to dig into zle, and there is only a few resources available online.

[GhettoComputers]

Fish has sane defaults. I don’t think using shell scripts is a great idea. The creator of oil shell pops up pretty often, he has some default scripts that might be useful for some. Also I should add you can use it interactively in bash. https://wiki.archlinux.org/title/fish#Setting_fish_as_intera...

[mschrage]

If you want to play around with writing more 'interesting' completions, check out Fig (https://github.com/withfig/autocomplete).

You can write completions declaratively and use TypeScript to generate dynamic suggestions.

Disclosure: I'm one of the founders.

[boibombeiro]

Looks neat.

I've though about using tree-sitter DSL to generate zsh completion.

Your project seems to be a better candidate for this. Tree-sitter DSL, with some extra annotations, could be used to generate the specification. With the added bonus of being a format that can provide syntax highlight on text editors (in commands in sh files).

If I not mistaken, tree-sitter also uses TS.

I only gave a quick look at fig (only use HN on mobile). Will have a better look when at the desktop.