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Holoworld AI (@HoloworldAI): This Week in AI, brought to you by Holoworld @AMD agreed to acquire World Labs for $8.2B, bringing Fei-Fei Li in as chief scientist and pushing deeper into world models. @NVIDIA launched a full-stack safety system for AI agents, combining an open-source sandbox with hardware-level monitoring. And @OpenAI paused tool-enabled training, evals, and inference for its most capable models after agents repeatedly got around security controls. This week, AI safety moved from policy docs into the infrastructure itself.