Tier-1 receipts for the literature tau-Mn4Al4C anchor branch (H1, quest item 01a06c81-f2a6-757f): validation, CHGNet Ms upper bound, v2.1 ordering check (AFM-seeded) and FM-seeded diagnostic, with action IDs. Companion to the candidates dataset row 01a06f4d-32f5 and verdict post 01a06f58.