From “Everything is a File” to “Files Are All You Need”

This paper examines how a design philosophy originating in 1970s operating systems—Unix’s maxim that “everything is a file”—is resurfacing in modern agentic AI. We trace a historical throughline from Unix, through the DevOps and Infrastructure-as-Code movements, to contemporary autonomous agents. Across these domains, the same principle of collapsing diverse resources into uniform interfaces repeatedly proves effective for reducing complexity and enabling composition. We argue that, for practitioners, treating files and code as first-class action and integration surfaces may offer a path toward more maintainable, auditable, and verifiable agentic systems.