HN has been running a no-politics-for-a-week 'experiment' [1]. Although it hasn't been a week, I think we've learned as much from it as we're going to, so it can be over now.
Among what we learned is that it's impossible to define 'politics' with any consensus because that question is itself political, and that HN is at its best when it can meander through all (intellectually) interesting things, some of which have political dimensions. The current story is a good example: it's not apolitical, but it isn't purely political either, and it's clearly on topic for HN.
In other words, the existing guidelines have it about right (https://news.ycombinator.com/newsguidelines.html), so carry on as normal.
1. https://news.ycombinator.com/item?id=13108404. I put 'experiment' in quotes because people understand that word differently. We mean 'trying something for a little while, to see what happens'.