Paste model output that is broken in one of the usual ways and watch it get repaired, checked, and either fixed or safely replaced.
A model asked for JSON returns JSON most of the time. The rest of the time it comes back wrapped in a code fence, with a chatty sentence in front of it, with the wrong kind of quotes, or cut off halfway because the reply ran out of room. Code that simply tries to read it falls over.
Paste any of that here. The page runs six repair steps in order and tells you which ones fired and what the text looked like afterwards. Then it checks the result against the exact shape a support ticket triage is supposed to have and lists every problem it finds, with the field each one is in.
Finally it runs the retry loop. On this page the stand-in model just repeats what you pasted, so if the text can be repaired you see the finished object, and if it cannot you see the attempt budget run out and the safe default that the rest of the application receives instead of a crash.