The purpose of this article is to construct an epistemological problematics of the digital writing in the perspective of a non-anthropocenric concept of posthuman writing. The digital media revolution is intimately related to the writing revolution. In particular in the contex of artificial intelligence, it's time to rethink the nature of writing regarding the question of agency of writers. In sum, the author want to pose a fundamental question, who writes in fact in the digital era? In this regard, a non-anthropocentric conception of writing is needed to explain the posthuman literacy which is based upon the assemblages of human and machine writing. This article insists on the fact that the machine behaves in the digital writing. In this context, the performativity of writing and computer code sources might be recognized.