Does anybody know if sqlite is compatible with saxon-b? More specifically, I'm
trying to use sqlitejdbc-v056.jar with saxon-b and am getting a connection
error. Is this a problem with my code, or will this simply not work at all?

You presumably mean that sqllite is acting as the JDBC provider for the
sql:connect extension in Saxon?

I don't know of any reason why it shouldn't work. We don't test with a vast
array of different JDBC providers, and getting the configuration of JDBC
providers right can be very fiddly in my experience, but there's usually some
way of getting it to work. Have you got it to work from your own Java code? If
that works, then getting it to work from Saxon is usually fairly
straightforward.