I just noticed that, in the email copy of a comment that I posted, the "You replied to" metadata at the top includes the text "[locked]" after the link when it's a reply to a locked post.

That's probably been there a while, but I noticed it today because I had the thought of "is this a thing that would be appropriate to forward?" and saw that and didn't have to go looking to find whether it was a private context.

So, to make this a question: Who should I be saying "thank you" to for that little feature?