I Built a Policy Drift Detector for LLM Agents. Here's What Four Versions Taught Me.

This is part of an ongoing series on drift_orchestrator — an open-source safety library for detecting behavioral drift in LLM-assisted operator loops. Previous posts covered the core architecture and the Semantic Gradient Evasion vulnerability class. The problem sounds simple: detect when an LLM agent's responses are gradually redefining the security policy it's supposed to be operating under. In practice, getting a reliable signal took four attempts, a lot of false positives, and one insight th