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How can I force structured outputs like JSON or CSV?

Give a strict schema, forbid extra text, and include one valid example. Ask the model to validate against the schema before returning. Parse on your side and auto-retry with a correction hint if parsing fails. Keep field names and types simple.

In practice

Schema comments (brief field notes) improve accuracy more than long narratives.

Where to start

  1. [01]Define your schema with required/optional fields.
  2. [02]Provide a minimal working example.
  3. [03]Add a parser + retry loop.
  4. [04]Track field-level error rates over time.
JSON output promptstructured output AILLM CSV

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Open source · Python