Top-100 mined hard negatives per document for training contrastive sentence-embedding students against Qwen3-Embedding-8B (MRL→512). Built by exact-cosine kNN over the cached teacher embeddings at jsanzolac/qwen3_emb_512.

Doc-id alignment

Row i of hard_neg_indices.npy lists the doc_ids of the top-100 teacher-kNN of doc i, aligned with row i of jsanzolac/qwen3_emb_512_packed/targets.npy. Indices reference the same global doc ordering used by… See the full description on the dataset page: https://huggingface.co/datasets/jsanzolac/qwen3_emb_512_hard_negatives.