- amssh: use dedicated /etc/pam.d/amssh service instead of login (pam_u2f
was commented out in login); auto-create service and register key on
first-launch FIDO selection
- amssh: redirect pamtester stdout+stderr to /dev/tty so the tap prompt is
visible and the success message doesn't contaminate pass=$(_get_passphrase)
- amssh: split _fido_pam_available into _fido_hardware_available (for dialog
gating) and _fido_pam_available (runtime — requires keys file + PAM service)
- setup: add pamtester to core-packages.sh
- setup: add audit-packages.sh to verify installed packages come from the
expected source (pacman/AUR/flatpak)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>