Confirm user presence via ssh-agent protocol?

[Jesse Hathaway]

On Thu, Dec 4, 2025 at 7:58 PM Damien Miller <djm at mindrot.org> wrote:
> On Thu, 4 Dec 2025, Jesse Hathaway via openssh-unix-dev wrote:
>
> > However, I would really prefer a message in my terminal. Would it be
> > possible to add a new ssh-agent protocol message to indicate that a
> > touch is required?
>
> It's not an easy thing to fit into ssh-agent, the FIDO layer or the
> protocol unfortunately.

Thanks Damien, I feared it was more complex then my user level
understanding of SSH's inner workings. Would it be possible to elaborate
on the complexity a bit?