JSON Mode Is Syntax Safety, Not a Contract
Differentiate what JSON mode guarantees from what only a schema and validator can guarantee.
Valid JSON is only the outer wrapper; the contract lives in the schema and the validator. The control stack Prompt wording teaches meaning. Structured output features protect parseability. Schemas protect shape. Validators protect live correctness and policy. The common mistake Teams often celebrate valid JSON and miss that their downstream system still has no reliable contract for required fields, enums, or extra-key handling. The practical test Ask what the next consumer needs, what breaks if a field drifts, and whether the workflow is only informative or actually action-driving. Why this holds up Separating the layers makes debugging faster because you…
Sign up free — one personalized lesson every day, matched to your role and goals.
Already have an account? Sign in