A four-point failure of (J_+, boxdot)-cubical excision — v0.2.0-candidate

Anonymous, unrefereed Evidence Press candidate. The package proves an exact four-point failure of interior-cover excision for normalized (J_+, boxdot)-cubical homology with integral coefficients. It includes a seven-page manuscript, stable Python/JavaScript certificate, 15 unit and audit tests, six semantic mutations, a non-mutating replay, manifests, gate receipts, and explicit assurance limits. Novelty and historical priority remain unresolved; producer-side replay and review are not independent validation or peer review. Reserved DOI: https://doi.org/10.5281/zenodo.22171896.