Unity Editor Scripts: GameObject Added / Removed Event?

Does Unity provide an editor script event for GameObjects being added or removed from the scene/hierarchy? I’ve been looking through the Editor Classes and haven’t found anything that does what I want.

I want to detect when the user adds/removes any GameObject to/from the scene and handle it in an editor script.

check out

EditorApplication.hierarchyWindowChanged

EditorApplication.projectWindowChanged

There isn’t much documentation on these, so have at look at this forum thread:

Forum - EditorApplication.hierarchyWindowChanged

Basically, you are assigning a delegate somewhere in your editor code that fires off when either the hierarchy or project windows change.