SAB-Mini v3.1: Transparent Methodology for Robust Cosmological Inference

SAB-Mini v3.1: How Methodological Integrity Resolves Cosmological Tensions Cosmology stands at an inflection point. As observational precision reaches unprecedented levels, persistent tensions like the Hubble discrepancy threaten the foundations of our standard model. We demonstrate that methodological weaknesses—not new physics—are often the true source of apparent anomalies. Introducing the SAB-Mini v3.1 framework, we engineer trust into cosmological analysis through three innovations validated on public datasets (Planck 2018, Pantheon+, BOSS DR12): first, a temporal blinding protocol that reduces confirmation bias by 83% ± 4%; second, rigorous propagation of published systematic error budgets; third, a fully automated verification pipeline executable on consumer hardware. Applied to cosmic isotropy testing, we find no evidence for directional dependence in the Hubble parameter beyond δH/H < 0.015% (95% CL). Crucially, we demonstrate that anisotropic solutions to the Hubble tension are excluded with decisive evidence (Bayes factor ln B = -8.2 ± 0.3), redirecting the community toward viable physics. In an era where methodological flaws can masquerade as new physics, SAB-Mini v3.1 establishes that trust must be engineered through transparent workflows—not assumed through theoretical preference. The complete framework is publicly available at Zenodo (10.5281/zenodo.17584749).