A Shared Language for Agent Defense: Introducing Project Quarry

Cisco has open-sourced Project Quarry, a neurosymbolic detection language designed to help security teams identify multi-step AI agent attacks by analyzing sequences of behavior across complete sessions. The tool combines machine learning classifiers with exact rule-based checks to catch complex security risks like reward hacking and excessive agency. Project Quarry integrates with existing security frameworks and is available via a GitHub repository. Open article →