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Link the arXiv paper (2609.03350)
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Re-chunk test_tail parquet (20K-row groups, page index) for the dataset viewer
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Re-chunk test_iid parquet (20K-row groups, page index) for the dataset viewer
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Re-chunk val parquet (20K-row groups, page index) for the dataset viewer
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Re-chunk train parquet (20K-row groups, page index) for the dataset viewer
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Sync with paper v2: subset manifest, comparable corpus sizes
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Corpus size in Gemma tokens with SP-token note
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Round training-document count
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Card: source field name
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Card: field names match parquet schema
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Author order update
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Full author list + team section
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Update card links to COPA-AI
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ArmWeb manifest
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ArmWeb split test_tail
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ArmWeb split test_iid
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ArmWeb split val
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ArmWeb split train
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Add release card
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initial commit
