Human-in-the-Loop Tools for the Agent SDK

Human-in-the-loop (HITL) tools are now supported by the Agent SDK, providing a mechanism for automated agents to handle routine tasks while pausing for human intervention in high-stakes situations. This new tool type is controlled by a single hook, allowing for flexibility in deciding when to auto-resolve tasks or escalate them for human review based on predefined criteria like dollar thresholds or risk scores. The SDK facilitates seamless integration by managing state tracking, hook dispatch, and schema validation without requiring additional loop code from developers. The HITL framework's pause and resume cycle involves the model calling a HITL tool, followed by a decision-making process that can either allow the agent to continue automatically or pause for human input. Once a human decision is made, it is processed and the agent resumes its operations, with optional post-processing to enhance or validate the human response. The distinction between HITL and requireApproval tools is that HITL uses data-driven logic for decision-making, whereas requireApproval mandates explicit human consent for each operation.

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