Honestly, this is a clever way of doing this. It means the additional instructions are stored alongside the text they reference, which makes it easier for doc writers to keep in sync and it probably also makes it more effective since the bot is guaranteed to read it at the right time in the right context.
I doubt they actually send it with every request and hide it in CSS, it probably does some other kind of check (IP, user agent, token...). This also tracks with the fact it is now entirely gone - presumably they just fixed that if statement and it's again chatbot-only.
I doubt they actually send it with every request and hide it in CSS, it probably does some other kind of check (IP, user agent, token...). This also tracks with the fact it is now entirely gone - presumably they just fixed that if statement and it's again chatbot-only.