Exact Local Likelihood Closure within a Frozen Cosmological Window: A Reproducible ACT DR6 and ACT+SPT Assessment

This record provides a reproducible publication and assessment bundle for an exact local likelihood study in a frozen cosmological comparison window based on ACT DR6 and ACT+SPT archived evaluations. The deposited materials include the main paper, a specialist algorithm document, LaTeX sources, compiled PDF files, Python assessment code, rebuild scripts, figures, supporting tables, and assessor-facing reproducibility outputs. The scientific aim of the record is narrow and explicit: to test whether any exact neighboring spectral-index point within a fixed local comparison window exceeds the archived reference point under the deposited frozen operational comparison score. Using the exact outputs included with this record, no tested neighboring point surpasses the reference point; all evaluated competitors yield negative exact margins relative to it within the deposited window. This deposit is intended as a transparent and auditable reproducibility package. It documents the score construction, the local window-selection rule, the exact local-dominance criterion, the assessment logic, and the code used to regenerate the reporting outputs. The package also includes a specialist-facing assessment algorithm and rebuild pipeline designed to support independent inspection and bounded rerun preparation. The claim boundary of this record is conservative. It supports a reproducible bounded local operational result for the tested ACT DR6 and ACT+SPT window only. It does not claim a final theorem-grade external proof or a universal cosmological conclusion beyond the archived local assessment scope. Heavy external runtime data bundles are intentionally excluded from the lightweight archive and should be supplied separately when a full bounded rerun is required.