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Lillian Tsai

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#artificial intelligence Preprint Sep 2026

Sapien: A Stateful Policy Engine for Autonomous AI Agents

Contextual security defenses prevent AI agents from taking rogue actions by synthesizing a task-specific policy and enforcing it on the agent's tool calls. In multi-step tasks, however, which actions are valid often depends on what the agent has already done and learned. We present Sapien, a policy engine for enforcing...

CO Tiffany, Wen Zhang, E. Bagdasarian et al. · 0 citations

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