[Newbie] Completing M-x commands includes private functions (i.e.: pkg--foo)

[arichiardi]

Just installed and started using vertico - I noticed M-x completions give me a lot more functions on top of the "public" ones.

I was wondering if there is a way to filter our functions that have the form pkg--fn-name as they typically are package "private" (knowing it is just a convention...)

Am I in the right place for this question 😄

[minad]

Generally commands should not be marked with -- as private. In my configuration only very few commands are private and are still shown in M-x. They are usually special implementation details. They could be hidden by setting the completion-predicate to ignore. Please report to the respective package maintainers and ask them to mark these private commands as hidden via the completion-predicate.

[minad]

I should add - the completion predicates and completion modes declares were added in Emacs 28. They are generally useful since they can help hiding irrelevant commands in unrelated modes, or commands which are only relevant in some context, and also as in this case private commands. I hope that package maintainers start to use this functionality.

[arichiardi]

Oh I did not know that - I'll try and pursue that for commands that I see and should not be there.

Thanks a lot - I'll mark this as answer.