LangChain Structured Output & HITL
- Structured Output: Transform unstructured model responses into validated, typed data
- Human-in-the-Loop: Add human oversight to agent tool calls, pausing for approval
Key Concepts:
- response_format: Define expected output schema
- with_structured_output(): Model method for direct structured output
- human_in_the_loop_middleware: Pauses execution for human decisions
| Use Case | Use Structured Output? |
|---|---|
| Extract contact info, dates | Yes |
| Form filling | Yes |
| API integration | Yes |
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