Hey Jevgeni, I'm copying the dev list because this is a public question. (Please try to do this on all communications unless it is something private :) That way we can all help and discuss. So, really FORGE-183 is open-ended, but in general it's meant to allow projects to know when they contain a Git repository. You will need this feature for the Git undo plugin. My recommendation is to implement GitFacet in such a way that it will be "installed" or "registered" if the project contains, or exists in, a git repository. Then once you have done that, I'd start working on the UndoPlugin and UndoFacet. You will quickly discover which other methods the GitFacet needs to contain, and we can discuss on the dev list in order to make sure the design is as good as we can get it. Sound good? ~Lincoln On Thu, May 17, 2012 at 11:24 AM, Jevgeni Zelenkov < jevgeni.zelenkov(a)googlemail.com&gt; wrote: -- Lincoln Baxter, III http://ocpsoft.org "Simpler is better."