Anthropic 20260525 How We Contain Claude Across Products Summary
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What happened
Anthropic’s official engineering blog published How we contain Claude across products, a May 25, 2026 post about the containment architectures behind claude.ai, Claude Code, and Claude Cowork.
The core argument is that agent safety is becoming a blast-radius engineering problem. As agents get more capable, the value of giving them real access rises, but so does the damage they could do if they misbehave, follow malicious instructions, or are steered by hostile content. Anthropic frames risk as two separate quantities: how likely a failure is, and how much harm a failure can cause. Better models, classifiers, prompts, and training can reduce the first quantity, but the second has to be capped by deterministic boundaries such as sandboxes, virtual machines, filesystem controls, and network egress policy.
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