{
  "name": "cpt_recipe_v1",
  "goal": "Continue pretraining nanochat-d24 on a safe, high-value mixture for a 48-hour run.",
  "backbone_dataset": {
    "repo_id": "karpathy/climbmix-400b-shuffle",
    "role": "primary",
    "notes": "Use ClimbMix as the main pretraining backbone because it is already the best-performing dataset in this fork."
  },
  "optional_augmentations": [
    {
      "repo_id": "nvidia/Nemotron-Pretraining-Code-v2",
      "role": "code",
      "notes": "Selective code augmentation only."
    },
    {
      "repo_id": "nvidia/Nemotron-CC-Math-v1",
      "role": "math_science",
      "notes": "Selective math/science augmentation only."
    },
    {
      "repo_id": "nvidia/Nemotron-Pretraining-Specialized-v1.1",
      "role": "specialized_web",
      "notes": "Use sparingly for targeted specialization."
    }
  ],
  "do_not_do": [
    "Do not replace ClimbMix wholesale.",
    "Do not attempt architecture changes during this 48-hour continuation run.",
    "Do not rely on continued pretraining for current-events freshness."
  ]
}