New codes drop in Discord first per Pro Game Guides.
Patch notes for the weekly Friday update land there before they show up in code aggregators.
Trello link (the in-game info hub) is shared in Discord.
What we don't pull from
Official Trello: Pro Game Guides FAQ describes the Noob Tower Defense Trello as the primary information hub but does not publish the URL. Direct in-game lookup needed.
Discord server content: We do not log in to the Discord server. Any in-server announcements (codes, patch notes) must come from there manually.