{
  "schema_version": 1,
  "name": "cup_5mix_holdout100_20261021",
  "random_seed": 20261021,
  "sampling_method": "Python random.Random(seed).sample(sorted(previous_train_episode_ids), 70); no stratification or redraws.",
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  "counts": {
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    "added_heldout": 70,
    "heldout": 100,
    "train": 142,
    "other_excluded": 1
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  "cup_numbering": "right_to_left_overhead",
  "convention": "Cup 1 = right, cup 2 = middle, cup 3 = left in the overhead image.",
  "applicability": "For future training using this split. Existing checkpoints trained on the newly selected 70 demos.",
  "display_order": "Tests 1–30 preserve the previous test order; tests 31–100 show the random additions in descending original episode order."
}