Cisco open-sources Project Quarry, a detection language for AI agent behavior

Cisco has open-sourced Project Quarry, a neurosymbolic rule language and evaluation engine for detecting harmful or disallowed AI agent behavior across multi-step traces, covering LLM conversations, tool use, MCP interactions and multimodal inputs. Rules combine machine learning classifiers and LLM judges with exact symbolic checks, and return evidence for each match; Quarry is already in production in Cisco AI Defense, with planned integration into DefenseClaw and Policy Studio.