I am designing a responsive website and wanted to provide the developers with a style guide. But I was wondering if I should provide 2 separate guides, one for the big screen one for the small.
Regardless of how many guides you provide, they just need to be in the one place that is easily accessible to the developers. The more flexible strategy is to help developers understand how to adapt to different screen sizes, because the layout is only one aspect of responsive design. How the content needs to be adapted for different screen sizes, and how the interaction and behaviour needs to be adapted for different or multiple screens at the same time is just as important as the actual styling of the on screen elements.