I don't think you'll get a reply to this because this article wasn't posted to Hacker News by its original author, and I don't think the original author is participating in this comment thread at all. You might want to find a different way of contacting the author.
I don't blame him for trying, the number of times I've seen someone pop into the comments of a submission saying "Hi I'm ________ and I wrote/made/did/worked on this" is pretty high on this website.