On our RouteForge FAQ, MRL truncate_dim 64-d dropped R@5 to 0.62 — hard-slicing MiniLM is not Matryoshka

Author 100 RouteForge FAQ chunks × 15 gold queries on tomaarsen/mpnet-base-nli-matryoshka (max 768, L2 after truncate, seed 20260928, API $0). Only truncate_dim moves ∈ {768, 512, 256, 128, 64}. Neg c