This tool is absolutely amazing and a great idea… but has a big caveat: you can't sandbox it because it extends prototypes, so unfortunately it's entirely 100% unusable in node because it breaks module encapsulation. Node allows multiple versions of the same package to exist simultaneously, so if one package depends on sugar@1.0.0 and another on sugar@1.5.0, the version that is used to extend the prototypes is entirely determined at run-time – and could even change at run-time.