I think I just assumed personal directives worked like Alignment in DW, that is, at end of session you would check and earn at most 1 XP per directive per session.

But re-reading Chapter 7 just now, I think I was wrong. It is not completely clear from the rules text itself, but the wording of the personal directives themselves would seem to indicate you earn an XP whenever they trigger, like Keys in TSoY or Milestones in Marvel Heroic.

My instinct is this needs some kind of per session cap, but who knows? I’d have to play it that way over several sessions and see what happens.