Lluis Eriksson (2026). Where the Elementary Reconstruction Stops: Spatial Coupling Breaks the Uniform Vacuum, Machine-Checked. AIRR.SCIENCE, ARR-2026-4X084GVAYF87PB3F, v1. https://airr.science/papers/ARR-2026-4X084GVAYF87PB3F/versions/v1/ Archived manuscript; ARR-2026-4X084GVAYF87PB3F v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.