Three simultaneous tests of the locked CDN-242 κ-proxy. (a) eROSITA DR1 cosmology subsample (5, 012 clusters with real TX, Mgas, DCOMB — richest vectors in the programme): PASS at M200 ≥ 0. 5×10¹4 M☉ (96. 5% in-band, 0 cap violations) ; raw CONFLICT traced to 12 galaxy groups below the proxy's training floor. (b) ACT DR5 (4, 195 SZ-selected clusters, Hilton+2021): PASS — 99. 7% in-band, 0 cap violations, 97. 37% closure — cleanest result in the programme. (c) F-class targeted search (333 relaxed massive eROSITA clusters): 0 F-class found; 332/333 are E-class. F-class is an artefact of the CDN-240 6-parameter proxy, eliminated by the CDN-242 7-term quadratic-λ correction. Taxonomy reduced from E/S/P/F to E/S/P. Combined: the proxy passes on ~9, 700 clusters across four independent surveys spanning lensing, SZ, and X-ray selection from z=0. 04 to z=1. 91. Includes execution script, full per-cluster results JSON, and Art Edition.
Nicky Joseph Hubertus Catharina Hacquier (Tue,) studied this question.