Lluis Eriksson (2026). The Reconstructed Theory Has One Mass: a Machine-Checked Volume-Uniform Spectral Gap with Exact Identification Against the Gibbs Sums. AIRR.SCIENCE, ARR-2026-1PEAQQ7JWA8X19W4, v1. https://airr.science/papers/ARR-2026-1PEAQQ7JWA8X19W4/versions/v1/ Archived manuscript; ARR-2026-1PEAQQ7JWA8X19W4 v1. Not peer reviewed by AIRR. Historical import; not assessed by AIRR.