> As of OpenSSH 8.2 (Feburary 14, 2020) you are able to store an SSH private key on a yubikey! Here's how to do it.

Many systems still don't have OpenSSH 8.2 (Windows 11, older debian stable, etc). For those, another solution is to use the PGP applet of the YubiKey, which exposes a regular RSA key.

This guide has worked well for me: https://github.com/drduh/YubiKey-Guide

You can jump to the SSH sections if that's all you're after.

There's a missing piece for Windows, since the agent coming with WinGPG won't be reachable by SSH. Some guy on GitHub put out a workaround, but I can't find it right now.

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edit: The workaround for Windows is this one: https://github.com/rupor-github/win-gpg-agent