Glean packed four launches into one keynote today. A desktop AI workspace called Tau, autorouting across models, a unified AI gateway, and agents that act before you ask. Three of these are infrastructure. The fourth is the swing. The proactive agents are the piece I'd watch. Every enterprise AI vendor is going to ship something called proactive this year, and acting before you ask is a big promise. Context is what separates a proactive agent from a notification feed with extra steps. An…