The Universal Update: Coherence as an Evaluative Instantiation

Shows that the Spektre corpus evaluation operator is a special case of a universal iterative update equation shared by gradient descent, Bayesian inference, evolutionary dynamics, reinforcement learning, and the Free Energy Principle. The coherence signal minimizes declaration-realization divergence rather than prediction error. Resolves OP-3 from Truth as Fixed Point: the irreducible unknown U_i is a structural necessity following from Lawvere’s Fixed Point Theorem. Closes the derivation chain from 1=1 to universal dynamics.