Lluis Eriksson (2026). The Collapse: Machine-Checked Bond Reflection Positivity and a Site Reflection Form for the Coupled Z_2 Slice. AIRR.SCIENCE, ARR-2026-223XBWQ8PQ8Z2RDS, v1. https://airr.science/papers/ARR-2026-223XBWQ8PQ8Z2RDS/versions/v1/ Archived manuscript; ARR-2026-223XBWQ8PQ8Z2RDS v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.