Lane–Seifert Pantheon+ Baseline Qualifier — Package 1 Terminal Result: STOP

This record reports the terminal result of Package 1 of the Lane–Seifert Pantheon+ Baseline Qualifier. Under the preregistered TA-01/TA-03 qualification procedure, the baseline qualifier reached a valid terminal scientific STOP at gate H_P1690_z004. The three-seed importance-nested-sampling mean is ln B = −2.5695 (sample SD 0.0375, n = 3), which lies 0.2505 from the published target −2.82 and therefore outside the preregistered tolerance of ±0.10. The five preceding gates passed. The run completed without a technical incident. Because the first valid scientific gate failure terminates Package 1, the remaining H/P+580 gates were not computed. In accordance with the preregistration, the controlled H-vs-T architecture switch (Package 2) remains inactive and was not executed. This result does not establish that the published Lane value is erroneous or irreproducible, does not identify the cause of the deviation, and does not attribute the Lane–Seifert difference to likelihood architecture. The deposit contains the final STOP record, machine-readable Markdown version, the sealed deposit kit with the relevant hash and provenance bindings, and the complete Package-1 return archive together with its SHA-256 sidecar. It is published as v0.8 in the existing Lane–Seifert Zenodo record series under Concept DOI 10.5281/zenodo.22727796. v0.8 adds the Package-1 return archive referenced in record §6, which was omitted from the v0.7 upload, and updates the accompanying STOP record only to document this completion and clarify the descriptive §7 wording; the terminal verdict, numerical results, scientific scope, and Package-2 status are unchanged.