That's true. But if few more developers start issuing pull requests, then the maintenance team could arise out of that, and project would eventually start to also accept bug reports and feature requests. But in this phase, it's obviously that in this time frame the goal of the main and only developer is to get to the point that he has something that "works for him" and has a solid foundation he likes before making it usable to others.

So yes, it's perfectly in the spirit of open source. And no, it's not (yet) production ready for general (non Go coder) audience.