Excellent distribution of "Hello World". I've always used "Hello World" as an introductory first step to all languages I study, now I have the power and convenience of "Hello World" distributed as a pack! I only give it four stars however, since I feel that it should be integrated into an infrastructure to have an easily deployable hello-world server. It could also use a few concurrency abstractions for concurrent hello-world applications.

I really like this pack because it allows me an extra level of specific checking/safety on top of the already existing types in swi-prolog. As mentioned, this works very well with mavis. This makes programming in prolog even more enjoyable.