YubiKeys can be configured with a touch policy that requires the user to physically touch the device before it responds to a request. There is very little feedback to the user while it's waiting, other than a small and easily overlooked blinking LED on the YubiKey.
Would like to add a prompt to GPG while waiting for the YubiKey, using the existing pinentry tools, in order to make it more obvious that the user needs to take action.
A little more info/background can be found on my blog post: https://blog.unit410.com/security/2021/11/18/improving-yubikey-and-gnupg-usability.html
I've added a diff implementing this feature here: https://dev.gnupg.org/D542
(You can also find my patch on GitHub: https://github.com/joelnordell/gnupg/commit/1512c7b7fad6a9bee3ad9ca946c3b78988ceebb8)
What is the process for submitting this patch? Should I send it to the email@example.com mailing list?