checks the number of cards in the Corporation's HQ when it resolve, not when it triggers. If another ability, like from , causes the Corporation to have cards in HQ equal to his/her maximum hand size between the time Vigil triggers and resolves, then Vigil draws the Runner a card.
Vigil+Woman in the RD. Runner chooses to resolve WitRD 1st, corp draws to equal max hand size. Does Vigil then let you draw?
<a href="https://twitter.com/skymon3k">@skymon3k</a> Yes Vigil would give you a card if the Corp drew to max hand size.— Lukas Litzsinger (@RukasuFox) <a href="https://twitter.com/RukasuFox/status/560894293561573376">January 29, 2015</a>