If I may be so free, I read your docs quite carefully last night and it wasn’t immediately clear to me that “up” and “down” are automagically run to keep both the old and the new data in sync, while a migration is pending. To my reading this is a spectacular feature because it solves the “the only way is forward” problem (where you can’t actually ever roll back a migration or risk losing / making inconsistent some recent data) for many kinds of migrations.

May I suggest spelling this out more explicitly in the docs? As far as I can tell it’s only mentioned by example halfway down the tutorial. To me it seems like one of pgroll’s true killer features, worth more coverage :-)