At KDE we have 3 wikis:
https://community.kde.org has two focuses:
All the KDE resources are documented here.
If you are looking for (or want to add) a tutorial about general procedures in KDE, go under Guidelines and HOWTOs. You'll find useful information about our Infrastructure, Schedules and other ways to Get Involved
Your project should have a page at https://community.kde.org/Your_Project_Name. This is the entry point of your internal resources. All your page should have the format https://community.kde.org/Your_Project_Name/XXX, with the depth you find relevant. We do not enforce any structure as you can see in the examples below.
You have to think about it as the resource for your fellow contributors. What development environment do I need? or How do I compile the source or What are the code guidelines or What are the contact channel to get started are all valid questions to be answered here.
You can put add your schedules, your meeting minutes, the architecture of your program and everything you find relevant. Don't forget to use Phabricator do organize your tasks and todos !
For instance, you wrote a library to deal with maps: you might want to write some tutorials of how to link to the library, get in touch with other users of the library, find the tarballs, etc...
Another example would be Plasma writing there how to write a plasmoid based their tools or Kirigami describing how to get started with the kirigami libs.
https://userbase.kde.org contains your user documentation, the same that should appear when the user asks for