Old (ten years!) Agile Manifesto was aiming for destruction of documentation in creative projects. Or rather it was misread as a call for burning all the documentation. In fact Agile Manifesto only says that "comprehensive documentation" is worse than working software. Nobody can't deny that. Today though design become very, very, very important (even Google noticed that recently!) and, I argue, good design needs good documentation. My folks - UX designers are well aware of that. We spend our live making prototypes, wireframes and mockups. This new breed proved usefulness in many battles. Time to restore noble position of documentation. 

Times are changing. Progressive in the past Agile Manifesto looks more and more as modern as its website (http://agilemanifesto.org/). There's no a single word about User Experience and design. That's way it won't survive long.