[kellysutton]

We've toyed with the idea of doing commit messages, but we're holding off on them for now. A commit message is a way of explaining the behavior of the changes in (usually) code. When working with images though, the changes in design are readily visible. In a way, the commit message is contained within the image itself.

That being said, we may explore the options of a 2-up view in the future or a Github-style image diffing mechanism.

[SebMortelmans]

Agreed. We all end up naming our designs Index_01.psd, Index_01a.psd, .. anyway. I don't think commit messages are that important in design.