Good Wiki Citizen at Wiki. Almost all of them apply here.
Wiki Social Norms at Wiki. Not all of them apply here.
Unethical Editing at Wiki. Every one of these donts apply here.
Discussions should take place on their own +discussion cards. Every card can have a +discussion card, and even if it's not linked from or included in the main card's content, the +discussion card can always be reached by the options icon, "discuss" item in the pop-up menu, or by adding "+discussion" to the URL in the address bar.