Amusing. I, too, wrote my own ML-powered newsreader. (Not linking here because I don't want to de-anonymize my HN handle.)

I guess this is a thing people do. ;)

Does it use naive Bayes powered recommendations?

No. A DNN w/ BERT/nnlm embeddings (I'm between models right now). And a sort of context-based classifier so that it can react to new things you "like" without model retraining.