EvoSafeHarness: Automatically Evolved Safety Harnesses for LLM Agents

A framework that synthesizes deployment-specific agent safety harnesses — jointly searching a natural-language policy and executable enforcement logic — for a frozen model in a target domain. On AgentDojo it reaches 82.8% utility at 0% attack success rate, roughly double CaMeL's utility at that operating point, and transfers unchanged to unseen suites.