Why it matters

Output validation catches malformed and unsafe outputs. Standard for prod use.

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The architecture

Schema validation.

Grounding checks.

Retry with correction.

Output validationSchemaJSON validateGroundingcitation checkRetrywith correctionInstructor, Guardrails AI, Pydantic-AI all provide validation + retry
Output validation.
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How it works end to end

Instructor + Pydantic.

Guardrails AI.

Retry on fail.