Looks interesting and certainly well-documented, but I would consider changing the name. I instantly thought the other Palantir had launched something new.

I can only assume you are talking about J. R. R. Tolkien.

Feels like an interesting problem - but writing tests in javascript feels a little odd.

The way I approached this was to have a server holding state, and being in charge of the notification of humans. The actual network-testing, etc, could be carried out by a different tool which would talk to the alert-server.

https://github.com/skx/purppura/ + https://github.com/skx/overseer/ in my case. But these are not novel ideas, nor is it a novel approach in general.

Then

But interestingly this person has held the NPM package name "palantir" for 4 years. Wow. Just wow.

It was owned by another person. I simply asked to takeover the namespace as there was no code associated with the package.