Cool idea -- in some ways this "deno"-fies node, which I think is a sensible approach.

So far, Hagana only blocks outbound traffic from packages that are using the http or https modules. Support for other modules (e.g. net, dgram, dns) is coming soon.

This could be a problematic approach, though. If you are going OSS and do want to become ubiquitous, you will likely need much stronger protections. Obfuscation is not a path to security but blocking only some very basic vectors and then being explicit about it will have attackers adopt other similar vectors.

All in all, a cool first attempt at building with some work to do!