Re: Immediate completion help in minibuffer for specific commands

[Juri Linkov]

> It could be convenient for certain commands that prompt for minibuffer
> input to immediately display the possible completions.  A new variable
> could be added that would be a list of interactive commands that
> immediately invoke `minibuffer-completion-help'.
> [...]
> (setq commands-immediate-completion-help '(switch-to-buffer bookmark-jump))
> Is this functionality of interest?  Or perhaps it's already available
> (excluding third-party completion systems)?

Please look at the recently added 'completion-eager-display'
that you can customize by completion category, e.g.

(add-to-list 'completion-category-overrides
             '(bookmark (eager-display . t)))