I haven't seen guidelines lately, but Readability.com, before it was shut down, did have a page that's archived here: http://web.archive.org/web/20160301180825/

I haven't seen guidelines lately, but Readability.com, before it was shut down, did have a page that's archived here: http://web.archive.org/web/20160301180825/https://readability.com/developers/guidelines#publisher http://web.archive.org/web/20160301180825/https://readabilit...