It looks like you're new here. If you want to get involved, click one of these buttons!
The creator of Vanilla, Mark O'Sullivan, posted previews on his website back in 2008 and 2009 with information on Garden, the framework that Vanilla runs on.
Today, the previews are still helpful to users and developers of Vanilla for learning more about how Vanilla works and came to be. Here are links to the previews: