Derives testable predictions for the CERN antihydrogen programme. The stability filter mechanism sets the matter-antimatter ratio at the quark-class formation stage — not through later CP violation. CPT symmetry follows from identical condensation laws with mirror geometry. Independently predicts that antihydrogen falls under gravity identically to hydrogen; ALPHA 2023 confirmed this. Derives the Higgs mass m_H = √(m_t·m_Z) = 125.51 GeV, agreement 0.21%.