{
  lib,
  config,
  ...
}: let
  inherit
    (lib)
    mkOption
    types
    ;
in {
  options.marleyos.my = rec {
    name = mkOption {
      type = with types; str;
      default = config.snowfallorg.user.name or "marley";
      description = "Your username, for use as your login name.";
    };

    username = mkOption {
      type = with types; str;
      default = name;
      description = "Your username, for external profiles.";
    };

    fullName = mkOption {
      type = with types; str;
      default = name;
      description = "Your full name, for display purposes.";
    };

    email = mkOption {
      type = with types; nullOr str;
      default = null;
      description = "Your email";
    };
  };

  config = let
    cfg = config.marleyos.my;
  in {
    assertions = [
      {
        assertion = cfg.name != null;
        message = "marleyos.my.name must be set.";
      }
    ];
  };
}