Validate authorized_keys line by line with the question sshd actually
asks: ssh-keygen -lf on the whole file also fingerprints a private key
copied there by mistake, which sshd cannot use, so the migration would
have disabled the only working login path.
Tighten ~/.ssh and authorized_keys the way omarchy-setup-security-sshd
does, and back off from a group-writable home directory: StrictModes
makes sshd ignore the key either way, with the same lockout.
Complete with a notice instead of failing on conditions the migration
cannot repair (a broken or pre-Include sshd_config, an overriding admin
rule, a failed reload of a valid config), so those machines keep passwords
as they were without blocking every migration queued behind this one.
Only missing privileges stay pending, since a terminal rerun fixes that.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
