I think would be useful to have a hook too. Would be trivial to add one like zig-mode-hook. If folks think this is doable, I can make a PR for that.

zig-mode is using the standard define-derived-mode. The mode hook should be defined already. 🤔

if i had to guess it exists but isn't visible to custom.

What package management tool do you use to install packages? package.el? 🤔

yes.

it seems customize-mode is actually broken with a lot of non-core modes, i believe you need to add :group 'zig-mode to the mode definition.

I believed is there for a long time, see

Apparently, customize mode can't work with unloaded module. Therefore, you have to (require 'zig-mode) before customize-mode.

I believed is there for a long time, see

zig-mode/zig-mode.el

Line 494 in 9ce2009

:group 'zig-mode

Apparently, customize mode can't work with unloaded module. Therefore, you have to (require 'zig-mode) before customize-mode.

This doesn't appear to be the case on my setup. zig-mode-hook does not appear in the customize menu, despite being defined. I've created a PR (#113) that fixes this issue.