{
  "description": "GRPO groups with at least one rollout admitted to a retained optimizer update. Counts include partially scorable groups. Optimizer steps are not group counts.",
  "audited_at": "2026-10-01",
  "method": "Join group rollout_ids to efficiency records and optimizer_rollouts.jsonl. All scorable correctness values must be 1, and max(reward)-min(reward) must exceed 1e-9 for efficiency-only contrast.",
  "retained_segments": {
    "opencode": {
      "train-83820": [
        1,
        428
      ],
      "train-84025": [
        429,
        1000
      ]
    },
    "multi-harness": {
      "train-83822": [
        1,
        292
      ],
      "train-84027": [
        293,
        850
      ],
      "train-84319": [
        851,
        1000
      ]
    }
  },
  "excluded_updates": "Multi-harness train-84027 steps 851\u2013867 were discarded on resume from checkpoint 850.",
  "source_root": "experiments/lfm25-medium-hard1000-20260921",
  "runs": {
    "opencode": {
      "groups_with_committed_optimizer_admission": {
        "mixed": 308,
        "all_wrong": 134,
        "all_correct_efficiency_contrast": 97,
        "all_correct_no_contrast": 16
      },
      "total": 555,
      "eight_scorable_rollouts": {
        "mixed": 301,
        "all_wrong": 133,
        "all_correct_efficiency_contrast": 96,
        "all_correct_no_contrast": 16
      }
    },
    "multi-harness": {
      "groups_with_committed_optimizer_admission": {
        "all_wrong": 172,
        "mixed": 358,
        "all_correct_efficiency_contrast": 155,
        "all_correct_no_contrast": 1
      },
      "total": 686,
      "eight_scorable_rollouts": {
        "all_wrong": 158,
        "mixed": 348,
        "all_correct_efficiency_contrast": 153,
        "all_correct_no_contrast": 1
      }
    }
  }
}