feat

modules/features/dev/default.nix

@@ -3,6 +3,7 @@
     ./agent.nix
     ./arduino.nix
     ./bun.nix
+    ./drawio.nix
     ./java.nix
     ./nix.nix
     ./python.nix

modules/features/dev/drawio.nix

@@ -0,0 +1,20 @@
+{
+  pkgs,
+  lib,
+  config,
+  ...
+}:
+let
+  cfg = config.my.features.dev.drawio;
+in
+{
+  options.my.features.dev.drawio = {
+    enable = lib.mkEnableOption "Draw.io diagram editor";
+  };
+
+  config = lib.mkIf cfg.enable {
+    environment.systemPackages = with pkgs; [
+      drawio # Diagram editor
+    ];
+  };
+}