Reproducibility package for "From nominal redundancy to governed access: Sparse reserve-port preparedness for maritime disruptions"

This record contains an anonymized reproducibility package supporting the study “From nominal redundancy to governed access: Sparse reserve-port preparedness for maritime disruptions.” The package provides the computational materials required to reproduce the reported analyses, including fixed-seed Python scripts, environment specifications, compact analytical inputs, expected analytical outputs, publication-table validation materials, figure-generation routines, provenance records, integrity checks, and SHA-256 source registers. The package reproduces 18 analytical stages and 54 analytical CSV outputs and includes the allocation-consistent reserve-port optimizer, exact minimum-cardinality K90 search, exact up-to-five-port deterministic enumeration, assignment-relaxed MILP upper bound, accessibility and activation-failure sensitivity analyses, uncertainty certificates, compatibility and draft sensitivities, direction-aware centrality, network-route sensitivity, event-type-balanced analyses, destination-level fairness, equal-service carbon comparisons, operational calibration, and access-governance stress analysis. Author-identifying metadata are intentionally withheld to preserve double-anonymous peer review. Where complete upstream provider archives are not redistributed, source provenance, source locations, and cryptographic checksums are provided. Third-party data and source materials remain subject to the licences, terms, and attribution requirements of their respective providers.