Re: arguments hint

[Richard Stallman]

    Harmonia does this kind of cool language-aware stuff.

Is Harmonia a self-contained combination of many different features?
(I don't know, I am guessing, so please tell me if I'm wrong.)

Such packages are not a good way to add features to Emacs, because in
effect they make an alternate editor.  The right way to add multiple
features is to add each feature separately, making it fit in as much
as possible with all the rest of Emacs.  Then users can use them all,
or use just one of them.