[RnMomof7]

I thought the Jews didn’t have anything like an actual canon (except for the Sadduccees accepting only the Torah) untl Yavneh (the form I prefer to Jamnia).

There was a canon from the time of Nehemiah, this canon is discussed in maccabees 2

Jesus himself divided the canon before Jamnia

Luke 24:44 And he said unto them, These are the words which I spake unto you, while I was yet with you, that all things must be fulfilled, which were written in the law of Moses, and in the prophets, and in the psalms, concerning me.
Luke 24:45 Then opened he their understanding, that they might understand the scriptures,

[maryz]

Of course they had writings recognized as sacred, I don't see anything about a canon as such in your references -- the k'tuvim (Writings) aren't mentioned at all. I thought according to Protestants, Maccabees itself isn't canonical, so why would you consider it binding?