Designing for AI Agents: UX Principles for Human-AI Interfaces (2026)

Abstract illustration of large language models, representing interfaces designed for AI agents

Designing interfaces that serve both human operators and autonomous AI agents is the hardest UX problem I’ve worked on. Four principles — legibility, guardrails, calibrated trust, and the interface as control plane — plus what the EU AI Act now requires, drawn from real work at Validera.