[simonw]

I trust the thinking trace to show me the Python it runs.

(Though interestingly I believe there are cases where it can run Python without showing you, which is frustrating especially as I don't fully understand what those are. But I showed other evidence that it can do this without EXIF.)

In your example there I wouldn't be at all surprised if it used the flag without mentioning it. The non-code parts of the thinking traces are generally suspicious.