Avot 4:1 . Shulchan Aruch Orach Chaim 261:1

It looks to me like the linking is done each time, on the client side. So if the person reading the post has that Javascript blocked, then they don't get the links. Not really a big issue, but might be worth keeping in mind.

@aCVn That is true, but (a) writing our own code to do this would be a lot of work, (b) there are plenty of other features that are helpful-but-not-critical, like preview, character count in comments, etc. that are dependent on having Javascript enabled. Anyone who makes the choice to disable Javascript will have to deal with the limited features.

What about Bereishit 1:1 ?

@Aliza Works just fine. Just about everything works. Pretty amazing.

When I first posted the Bereishit 1:1 comment it did not generate a link. Is there a bot doing this asynchronously?

I briefly saw my Bereishit link, then I reloaded the page and all links in the comments are gone, but the one in the original post's link still works. Odd.

@manassehkatz Like I said, not really a big issue, just something to be aware of when someone says "what links are you talking about, I don't see any links".