Hosts now accept only the two CanoKeys' resident SSH keys for ryan, plus the romantic recovery key for root; per-host user keys stop working. Darwin builds work again: the shared base no longer sets nixpkgs.config next to nix-darwin's nixpkgs.pkgs.
Assisted-by: DeepSeek Harness (claude-opus-5-5)
Assisted-by: DeepSeek Harness (deepseek-flash)