Engine documentation
PLEASE NOTE: As of 2014, this page is grossly out of date. Ask on #minetest-dev.
Engine documentation is a way you can contribute to Minetest right now!
What we need
We want to document most or all of Minetest core with Doxygen-style code comments.
The usage of doxygen is explained there.
Where to start
Head over to #minetest-doc on IRC, and ask someone there to help you get started with documentation. You'll need to download the project through Git and then make your changes.