init by ai

nixos/modules/system.nix

@@ -0,0 +1,25 @@
+{ config, lib, pkgs, ... }:
+
+{
+  options.custom.system = {
+    enable = lib.mkEnableOption "Custom system module" // { default = true; };
+  };
+
+  config = lib.mkIf config.custom.system.enable {
+    # System-wide settings
+    system.stateVersion = "24.11";
+
+    # Users
+    users.users.youruser = {
+      isNormalUser = true;
+      extraGroups = [ "wheel" "docker" ];
+      shell = pkgs.zsh;
+    };
+
+    # Sudo
+    security.sudo.enable = true;
+
+    # SSH (disabled by default, enable in host config if needed)
+    services.openssh.enable = lib.mkDefault false;
+  };
+}