For thirty years, the central obsession of product design has been a single question: how do we make it easier for a human to click the right button? We built funnels. We A/B tested button colors. We agonized over empty states and loading spinners.

That era is ending — not gradually, but structurally.

… Agents don’t navigate UIs. They negotiate with systems. And when the agent is the primary “user” of software, the human behind it occupies an entirely different role — one for which we have almost no design vocabulary. Until now.

HX — Harness Experience — is the design discipline governing the interface between a human and their agentic fleet. — Read More