Made by PN Scripts, a Sofia studio that builds games and tools, and tested with unit tests of the noise, shake, springs, squash, hit-stop chains, flash, knockback at several frame rates, punch and every ease, a compile of the whole package against Unity 6000.5.4 and a check of the tarball as Package Manager receives it. Created with AI assistance; the core was checked by PN Scripts with 23 unit tests on .NET 8, and the package was compiled against Unity 6000.5.4 assemblies and checked as a buyer receives it; the Unity editor itself was not run.