Inside Tau: How Hugging Face's Agent Separates Brain from Body

This article examines Hugging Face’s open-source project, Tau, which demonstrates that a coding agent's "harness" is more critical to the final product than the underlying model itself. By separating a minimal 5% reusable core from a 95% infrastructure layer, Tau illustrates how essential components—such as provider adapters, tool implementations, and security policies—transform a simple model loop into a functional coding environment.