A practical lab · about 18 minutes
Interactive learning lab
Prompting techniques + Building with prompts · guide 4 of 8
The structured output contract lab
0/6 core signals
Saved only on this device
Schema lab · BriefingScene 1 / 7
Format is an interface
Human-readable output and machine-consumed output need different guarantees.
Format is an interface ready.
Predict
Inspect
Verify
Lists are forgiving, tables help people compare, and JSON helps systems exchange data. In production, native structured output plus application validation is stronger than asking a prompt to “please return JSON”.
Show the exact shape.
Define null and required fields.
Syntax validity does not guarantee semantic truth.