Do you expose the posterior probabilities anywhere so you can see how confident it is in the result?

Yes! It will show you the posterior probability as a single commit starts to become more likely. In addition, running `git bayesect status` will show you all posterior probabilities

Not the OP, but Fyi you know that to some extent anyway, because the termination condition is that confidence is above a specified value. This is one of the advantages over just doing git bisect with some finger-in-air test repeat factor. But yeah it can print that too.