A Reproducible Internal-Consistency Study of Likelihood Drift under Official Cosmological Stack Upgrading

This deposit contains the manuscript source, final PDF, figures, tables, validation files, and a dedicated runtime continuation bundle for ongoing computational work. The runtime materials include the scientific execution engine, YAML configuration files, helper scripts, and operational inputs intended to support continuation of the cosmology workflow in a properly prepared environment. The work is presented as a reproducible internal-consistency and likelihood-drift study, not as a claim of complete cosmological closure or a proof of a final unified theory. AI tools were used only for editorial and technical manuscript preparation; scientific responsibility remains entirely with the author.