There's the code style section on contributing back, http://guides.cocoapods.org/contributing/contribute-to-cocoapods.html#toc_4
The thing with this is that it really shouldn't end up like the [obj-c style guide](https://google-styleguide.googlecode.com/svn/trunk/objcguide.xml) but be light and give overall direction rather than step by step. Perhaps there could be a space for this in the API ref. Hard to say.