On our frozen InvoiceHub runs, R@5 picks V_push_4_5 (1.00) — nDCG@5 picks V_vector (0.44)
Author 116 InvoiceHub FAQ chunks × 15 queries, three frozen MiniLM ranking variants on the same graded gold (seed 20260928, API $0). Score Recall@5/10 (binary = grade ≥ 1) beside nDCG@5/10 (graded 0/1
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