{
  pkgs,
  lib,
  config,
  ...
}:
with lib;
{
  options.features.system = {
    enable = mkEnableOption "enable shared system utilities";
    preset = mkOption {
      type = types.enum [
        "minimal"
        "desktop"
        "ops"
      ];
      default = "desktop";
      description = "Package profile for shared system tooling.";
    };
    corePackages = mkOption {
      type = types.listOf types.package;
      default = with pkgs; [
        sops
        unzip
        zip
        wget
        htop
        procps
        fastfetch
        bc
        fzf
        eza
        rsync
        ripgrep
        fd
      ];
      description = "Always-installed core system packages.";
    };
    desktopPackages = mkOption {
      type = types.listOf types.package;
      default = with pkgs; [
        bluez
        bluez-tools
        poppler-utils
        alsa-utils
        libnotify
        hyprpicker
      ];
      description = "Additional packages for desktop-oriented hosts.";
    };
    opsPackages = mkOption {
      type = types.listOf types.package;
      default = with pkgs; [
        grc
        lazygit
      ];
      description = "Additional packages for operations-heavy hosts.";
    };
    extras = mkOption {
      type = types.listOf types.package;
      default = with pkgs; [
        lolcat
        fortune
        cowsay
        typst
      ];
      description = "Additional optional packages for all presets except minimal.";
    };
  };

  config = mkIf config.features.system.enable {
    environment.systemPackages =
      config.features.system.corePackages
      ++ optionals (config.features.system.preset != "minimal") config.features.system.extras
      ++ optionals (config.features.system.preset == "desktop") config.features.system.desktopPackages
      ++ optionals (config.features.system.preset == "ops") config.features.system.opsPackages;
  };
}