A Reproducible Checkpoint-Recovered Posterior Benchmark for GW150914: Artifacts, Stability Tests, and Exploratory Astrophysical Projections

This record archives a reproducible research package for a benchmark-oriented reanalysis of GW150914 based on a checkpoint-recovered posterior state. The package contains the manuscript PDF, LaTeX source, bibliography, derived tables and figures, and the scripts needed to rebuild the reported research artifacts from the included posterior products. The archived materials support manuscript-level and artifact-level reproducibility. A reader can regenerate the paper, figures, tables, and derived summary products directly from the packaged files. This record does not claim a full end-to-end rerun from raw detector strain to a newly converged collaboration-grade posterior. Rather, it provides a transparent and reproducible bridge from checkpoint-recovered posterior artifacts to stability analyses and exploratory astrophysical projections, while clearly identifying the additional inference chain required for full astrophysical posterior estimation. This deposition is intended as an open-science benchmark and methods-focused resource for reproducibility studies, posterior artifact analysis, and transparent workflow documentation built around GW150914 public-data products.