Agent security

Persistent memory turns one hostile input into a cross-session risk. Secure the write, retrieval, action, and recovery paths as one system.

NullSquare open-sourced Agent Behavior Lab so teams can measure how personas, tool definitions, histories, and model families shift agent safety.

Anthropic restored Claude Fable 5 with tighter cyber classifiers and fallback routing. Here is what that means for coders, debuggers, and security teams.

AI security testing works best when prompt injection is tested across documents, tools, memory, permissions, and real workflow boundaries.