The scrhack package used to be part of KOMA-Script. It was originally intended to improve the compatibility of third-party packages with KOMA-Script. However, most of the so-called hacks also added additional functionality to the corresponding third-party package. On the other hand, it was sometimes urgent to react to a change in such a third-party package, which was difficult to do from within a large collection like KOMA-Script. Therefore, the scrhack part of KOMA-Script was split into several independent packages. And the scrhack spin-off was made to emulate the former KOMA-Script package of the same name.