{
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    "Historical runs used different client counts and seeds; no single universal schedule is certified. The reference runtime now records explicit client/seed/round/step settings and fixed-context preprocessing per task. Its current contract does not establish that every old leaderboard score used those settings."
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    "guide": "integrations/pytorch/REFERENCE_MATRIX.md",
    "entrypoint": "integrations/pytorch/run_reference_matrix.py",
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    "verification": "All 14 CSVs reconstructed from fresh pinned public sources and matched preserved reference hashes on 2026-10-19. Not proof of every historical result's input or a full training recipe."
  }
}
