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Source: [Hacker News](https://startupfortune.com/how-to-build-a-marketplace-startup-that-solves-the-chicken-and-egg-problem/)
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A new layer is consolidating in the agent stack, and it has a name now: pre-action authorization. The idea is clean. Before an agent executes a tool call, a deterministic policy engine intercepts it, checks it against declarative rules, and signs an audit record.
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