The institutional weight of Seattle City Light's warning cannot be overstated: a public utility putting large AI tenants on notice that grid access may be conditional on self-supplied power is a new category of infrastructure constraint. Hyperscalers have treated grid access as a procurement problem — site selection, power purchase agreements, renewable certificates — not a political one. Seattle's moratorium push by three council leaders converts that political risk into a permitting risk, which is the one signal that moves capital allocation decisions. The developers who pulled back before the…