Where summaries come from
Written on your Mac by Apple Intelligence, from the quoted line only.
When Apple Intelligence is on, a change shows a short summary labelled Summary · written on this Mac from the quote above. It's made from the quoted line alone, on your Mac. It never decides a verdict, and a summary that adds a number or date not in the quote is thrown away.
With Apple Intelligence off, you see the quoted line and where your code meets it, which is what the verdict rests on anyway.