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AI safety is moving out of policy documents and into the infrastructure itself. NVIDIA has launched the Open Agent Safety Platform, combining an open-source runtime boundary called OpenShell with a separate hardware-based watchdog, Sentry.
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The TopCat AI Signal Report
The guardrail moves outside the model
Until now, most conversations about AI safety have focused on the model.
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Can it follow instructions?
Can it refuse harmful requests?
Can it recognize when it is uncertain?
Those questions still matter.
But long-running agents can use tools, run code, retrieve information, access files, call APIs, and interact with other systems. That creates risk outside the model’s text response.
NVIDIA’s platform reflects a different approach: build a boundary the agent cannot simply reason its way around.
OpenShell is intended to trace agent actions and enforce policy while an agent runs. Sentry is designed as an independent, out-of-band watchdog on NVIDIA BlueField-4 data processing units, monitoring agent behavior from a separate trust domain. NVIDIA says it can inspect requests and responses, verify agent identity, enforce zero-trust access policies, and stop an agent that tries to go beyond its defined boundary.