On Fri, Feb 19, 2021 at 4:53 AM Lars Ingebrigtsen <larsi@gnus.org> wrote:

A variation on that would be to query the user first when they type in
a mode-specific command (that belong to a different mode) -- "You've
asked to execute `5x5-solve-rotate-left' which is specific to
`5x5-mode'.  Really execute?"

It reminds me of the disabled-command-function machinery, or at least the concept. Maybe there's a decent way to leverage the two concepts into a similar UI pattern? 

~Chad