You're right. I missed the "P" suffix! The elisp "Using Interactive" documentation doesn't actually say a suffix works, it mentions only a P prefix.

Perhaps if it's okay with you, I'll just update the docstrings (and eliminate NEWS)?

On Wed, Feb 12, 2025 at 3:14 PM Dmitry Gutov <dmitry@gutov.dev> wrote:

Hi!

On 12/02/2025 19:36, Ship Mints wrote:
> Specifying a universal prefix argument when invoking 'project-remember-
> projects-under' or 'project-forget-projects-under' now imply recursive.
> This makes recursive interactive use easier.

Are you sure that this doesn't work already? The "P" at the end of the
(interactive ...) spec means that the value of the prefix goes into the
last argument of the function, which is RECURSIVE.

Both project-remember-projects-under and project-forget-projects-under
use this instruction.