"S³ Spatial Topology, Sol Geometry, and JWST Anomalies.'' Paper X in MEF Series

We derive cosmological predictions from the twelve-dimensional Riemannian framework M₁₂ = (S¹Sol × S³) × K₈, which in Papers I–VIII obtained the complete CKM and PMNS mixing matrices, the cosmological constant (Λeff ≈ 10⁻¹²² MPl⁴), the Higgs boson mass, the Weinberg angle, and the dark matter abundance ratio—all from manifold geometry with zero continuous free parameters. Three cosmological results emerge without observational input. First, the K₈ spectral bridge predicts the baryon acoustic oscillation scale LBAO = e-3π/2 √3/Λ ≈ 146 Mpc, in agreement with the observed 147 ± 0.3 Mpc to better than 1%. Second, the internal orbifold aspect ratio τ₂ = 1.86 matches the ratio of cosmological imprint scales rₛ/deq ≈ 1.86 to 0.5%. Third, the Sol temporal geometry, through its Anosov flow coupling to protogalactic angular momentum, produces a parameter-free disk formation timescale τalign = 2 tdyn derived from the twelve-dimensional Einstein equations—enabling disk galaxy formation in protocluster environments by redshift z ~ 8. The Sol mechanism provides a unified explanation for the excess massive galaxies (Labbé et al. 2023) and the unexpectedly early ordered rotating disks (Ferreira et al. 2023) observed by the James Webb Space Telescope: these are the same galaxies, formed through a single geometric mechanism. The Spinᶜ holonomy of K₈—independently responsible for the Weinberg angle at particle scales—produces CMB low-multipole power suppression of ~ 8% at = 2 and ~ 14% at = 3, consistent with the Planck observation of 10–15% deficit. All geometric structures were established before any comparison with JWST data. Six falsifiable predictions are presented, testable by JWST, Euclid, DESI, and the Roman Space Telescope within the present decade.