Pretty cool! I currently use Hacker News Enhancement Suite, made some tweaks via the Tampermonkey extension, and made a little "unread comments" and "tag user"

Pretty cool! I currently use Hacker News Enhancement Suite, made some tweaks via the Tampermonkey extension, and made a little "unread comments" and "tag user" feature. Looks like your extension might be able to replace some of that /and/ provide some cool new stuff!