Gheist is correct, it shouldn’t require rebuilding the engine in any way unless changes are being made. You mention that you’re forced to do so on Development every time you want to package… How exactly are you going about compiling that starts this? Are you hitting Build > Build Solution at the top of VS or using Ctrl+Shift+B? This option will build everything in the solution explorer and could result in this behavior. I would suggest right-clicking on your project directly and choosing build from the context menu. Also, the editor should actually never need to be built for “Development” and should only require either “Development Editor” or “Debug Editor” for most situations.