Chapter 67: The Complete Coupling Ledger

Every inter-sector coupling in the microcosm is a rational function of a single constant: ι_τ = 2/(π + e) ≈ 0.341304. There are exactly four self-couplings and six cross-couplings—ten entries in total. No fitted parameters appear. This chapter presents the complete ledger in one place, proves the structural theorems that constrain it, and establishes the No-Running Principle that distinguishes τ³ from orthodox quantum field theory.