The Wolfenstein parameter A is derived as A = 2α, where α = 0.40446 is the Fano lattice kinematic coupling constant derived in Papers XCVIXCVIII from the infall geodesic ODE. Numerically: A = 2 × 0.40446 = 0.80892, observed A = 0.8116 (PDG 2023), agreement 0.33%. The physical origin: α governs a single-generation crossing in the brane-to-bulk transition (the infall geodesic interaction term αK(r) sin 2θ). The Wolfenstein A parameter governs a two-generation crossing (Gen 2→Gen 3 relative to Gen 1→Gen 2), which involves two independent Fano valve contributions one from the brane side (spatial brane, +α) and one from the H+/+1 side (time direction, +α) giving A = α + α = 2α. The brane-side residence time (Bharathi 2026): the quark focal zone on the brane has a nite coherence time set by the sump T∗ 2 dephasing rate. The brane-side decoherence correction to λ satises δbrane = 2δH 1 −δΦH/4π , where δH = 1 −ξH = 0.00809 is the H+-side decoherence (Paper XCVIII) and δΦH = 0.01618 rad. This gives: λfull = λ0×ξH ×ξbrane = 0.22481×0.99191×1.01616 = 0.22659, matching the observed 0.22650 to 0.04%. The complete leading-order CKM prediction uses zero free parameters: λ = 0.22659, A = 0.80892, δ = arccos(1/ √ 7) = 67.79. ¯ρ and ¯η are the nal two quantities, to be derived from the G2 CP triangle (Paper CIII). Two new predictions are made (P70P71). Part of the One-Octonion Brane-Bulk Framework series. Anchor DOI: 10.5281/zenodo.19120873. Community: one-octonion-brane-bulk. Author: Bharathi Dasan Jagadeesan, M.D., University of Minnesota. ORCID: 0000-0002-1143-941X.
Bharathi Jagadeesan (Tue,) studied this question.