diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000000..58656b78d6
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+v14.19.1
diff --git a/packages/engine/src/engine-core.ts b/packages/engine/src/engine-core.ts
index abe378d64a..9974875534 100644
--- a/packages/engine/src/engine-core.ts
+++ b/packages/engine/src/engine-core.ts
@@ -71,6 +71,7 @@ async function registryInnerPlugin(designer: Designer, editor: Editor, plugins:
 
 const innerWorkspace = new InnerWorkspace(registryInnerPlugin, shellModelFactory);
 const workspace = new Workspace(innerWorkspace);
+console.log('new Editor()');
 const editor = new Editor();
 globalContext.register(editor, Editor);
 globalContext.register(editor, 'editor');
@@ -144,6 +145,8 @@ export {
 };
 // declare this is open-source version
 export const isOpenSource = true;
+
+// secret internals do not use or you will be fired
 export const __SECRET_INTERNALS_DO_NOT_USE_OR_YOU_WILL_BE_FIRED = {
   symbols,
   classes,
diff --git a/packages/engine/src/modules/classes.ts b/packages/engine/src/modules/classes.ts
index 44aeed9651..847aa4ff63 100644
--- a/packages/engine/src/modules/classes.ts
+++ b/packages/engine/src/modules/classes.ts
@@ -17,13 +17,17 @@ export default {
   Project,
   Skeleton,
   DocumentModel,
+
   Node,
   NodeChildren,
   History,
+
   SettingPropEntry,
   SettingTopEntry,
+
   InnerNode,
   Selection,
   Prop,
+
   SimulatorHost,
 };