I suggest adding an API for hooking into the generation of code for: 1. creating a class (like with New->Class or Create Class intention) 2. creating a field (like with Introduce Field) 3. creating a method (like with Extract Method) 4. creating a parameter (like with Introduce Parameter) 5. creating a local variable (like with Introduce Variable) 6. changing return type of method (like with Change Method Signature, and the change return type action) The API would entail being able to modify the generated PSI, and also being able to add custom GUI components to the corresponding dialogs. This would be useful for my (and your) @NonNull plugin. It might also make the implementation for IDEA's "make generated variables final" option more elegant.