There used to be an engines entry on all modules, but it was removed at some point. I can't remember the details, but one issue is that npm completely ignores it unless you installed with the --engine-strict flag, though that might also be broken.

So unless you are using yarn, it is mostly a signal to a human reading the file. I think the official hapi recommendation to figure out which node versions are supported, is to check the CI config. This makes the entry redundant and just complicates module maintenance.

Alright I see, makes sense. Thanks for the detailed explanation @kanongil.

Closed in favor of #246