Perhaps you're thinking of a different doc, or perhaps it has changed. I went to check it and it's literally 2 pages with 5 headings (all mentioned in this post

Perhaps you're thinking of a different doc, or perhaps it has changed. I went to check it and it's literally 2 pages with 5 headings (all mentioned in this post). There are some other much better ones in my opinion, and some great internal docs on writing and examples. I wish those were public.