The cosmological constant problem—often called the “worst prediction in physics”—is the 10¹²⁰-fold discrepancy between the quantum field theory prediction for vacuum energy and the observed value. In Category τ, there is no vacuum catastrophe because vacuum energy is structural, not summed over modes. The defect functional on τ³ gives finite vacuum energy by construction. The “catastrophe” arose from treating QFT as fundamental rather than as a readout approximation of the τ³ geometry.