Thanks lukas I just found it.
I'm immensely sad… because having a cool system like magritte not even be described decently somewhere is sad.
Before we got your master now nothing…

there is the screen-cast, a presentation, sample document and refactoring tools to help translate from Magritte 2 to Magritte 3. Could Magritte 3 do with more documents? - sure - but I don't have any free cycles

Nick