almost there

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -1 +1,2 @@
-.direnv/
+.direnv/
+node_modules/

extension.ts

@@ -1,14 +1,29 @@
 import { Extension } from "resource:///org/gnome/shell/extensions/extension.js"
-import * as Main from "resource:///org/gnome/shell/ui/main.js"
-import * as MessageTray from "resource:///org/gnome/shell/ui/messageTray.js"
+import Gio from "gi://Gio"
 
-export default class MyExtension extends Extension {
+export default class AutoRotate extends Extension {
+    _listenerId?: number
     enable() {
-        Main.notify(
-            "Simple Notification",
-            "A notification with a title and body"
+        this._listenerId = global.display.connect(
+            "in-fullscreen-changed",
+            () => {
+                const monitors = global.display.get_n_monitors()
+                const isFullscreen =
+                    [...new Array(monitors)].findIndex((_, index) =>
+                        global.display.get_monitor_in_fullscreen(index)
+                    ) != -1
+
+                const { Meta } = imports.gi;
+                const monitorManager = Meta.MonitorManager.;
+				if (isFullscreen) {
+                } else {
+                }
+            }
         )
     }
 
-    disable() {}
+    disable() {
+        if (this._listenerId != null)
+            global.display.disconnect(this._listenerId)
+    }
 }

flake.nix

@@ -20,6 +20,10 @@
       in {
         _module.args.pkgs = import inputs.nixpkgs {inherit system;};
 
+        devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [nodejs];
+        };
+
         packages.default = pkgs.buildNpmPackage (finalAttrs: {
           pname = name;
           version = "1.0.0";
@@ -46,7 +50,7 @@
           };
         });
 
-        apps.install = {
+        apps.default = {
           type = "app";
           program = let
             file = "/tmp/${uuid}.zip";
@@ -54,6 +58,7 @@
             pkgs.writeShellScriptBin "build" ''
               env -C ${self'.packages.default}/${extDir} ${lib.getExe pkgs.zip} ${file} -FS9r .
               gnome-extensions install --force ${file}
+              dbus-run-session -- gnome-shell --nested --wayland
             '';
         };
       };