We've been using the semi-documented chatid (link expired) variable to determine which live chat on our youtube channel is the the one Nightbot's been called from. We use this to index into a JSON database to which city to use for $(weather).
So doing !weather in the New York chat automatically gives New York weather.
Apparently today, the value returned by $(chatid) changed. It's still unique and could be used to index weather but it's a shortened form of the full Google chatid which can also be used for certain Youtube API calls (and we do use this database to simplify API access).
Is this change intentional and is it permanent?