Shift Happens: Detecting Behavioral Drift in Multi‑Agent Systems
Updates are boring until they are not. A retrieval index changes. A tool permission is adjusted. A base model is silently upgraded. A memory module starts carrying yesterday’s weird interaction into today’s customer support workflow. Nobody sees smoke. The dashboard still says “healthy.” The agent still answers. Then, three weeks later, someone notices that one group of agents has become strangely aggressive, risk-averse, evasive, or just less aligned with the behavior the product team thought it had shipped. ...