Analysis and reconstruction of the concepts of artifact and performative agency, under an ontological perspective, in order to understand the phenomena of interactivity and mutual constitution between agents and artifacts. The focus of the investigation is the agency and effectiveness of technological and artistic artifacts as they make up the world in which they can have effects and shape the agents that produce and use them. The intentionality and the agency of the intentional agents will be understood as founded on (...) the condition established by the artifacts that, although they are their creation, simultaneously impose restrictions and enhance their action and conscience. Performative action based on artifacts and artifices, in the sense of actions by which the agent is constituted as an intentional agent, establishes new modes of cooperative interaction and provides other forms of existence. (shrink)