I cant quite tell if the tests that passed were sqlites own famously thorough test suite, or your own.

If its sqlites suite then its great the models managed to get there, but one issue (without trying to be too pessimistic) is that the models had the test suite there to validate against. Sqlites devs famously spend more of their time making the tests than building the functionalities. If we can get AI that reliably defines the functionality of such programs by building the test suite over years of trial and error, then we'll have what people are saying