The only API change affecting us is that PasswordHash moved to password_hash::phc; use the argon2 crate's top-level re-export instead. Existing argon2id hashes in password files still verify. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Kmrgkpp9YBJ6AMaWYPPZuD