yknotify: A macOS YubiKey Touch Prompter

yknotify is a macOS command-line tool that monitors system logs for events associated with a YubiKey waiting for a touch, then prompts the user. It supports FIDO2 and OpenPGP, identifying specific log messages to determine if a touch is needed. While rare false positives exist, no false negatives have been reported. Users can install and run it; issues can be filed if problems arise.