{
  "topic": "long_horizon",
  "round": 2,
  "method_name": "dimension evidence scan",
  "idea": "Use delayed-feedback text and per-turn feature tags to identify candidate culprit dimensions.",
  "diagnosed_issue": "Long-horizon round 2 dominant issue: hard_distractor_temporal_ambiguity.",
  "patch_for_next_round": "Add temporal utility-drop windows so early weak distractors do not steal credit from the real culprit.",
  "patch_source": "autodiagnosed",
  "auto_diagnosis": {
    "dominant_failure_mode": "hard_distractor_temporal_ambiguity",
    "evidence": {
      "step_miss": 5,
      "dimension_miss": 5,
      "low_rank_gold": 0
    },
    "diagnosis_text": "Long-horizon round 2 dominant issue: hard_distractor_temporal_ambiguity.",
    "selected_next_patch": "Add temporal utility-drop windows so early weak distractors do not steal credit from the real culprit."
  },
  "selected_next_patch": "Add temporal utility-drop windows so early weak distractors do not steal credit from the real culprit.",
  "comparison_to_previous": {
    "status": "improved",
    "primary_metric": "culprit_step_accuracy",
    "primary_delta": 0.65,
    "headline": "culprit_step_accuracy changed +0.6500 vs previous round."
  },
  "failure_examples": [
    {
      "episode_id": "trace_0008",
      "delayed_comment": "那个误会梗埋得太早，后面解释让我出戏。",
      "gold_step": 4,
      "predicted_step": 2,
      "gold_dimension": "trope_misunderstanding",
      "predicted_dimension": "female_agency",
      "top_candidates": [
        {
          "step": 2,
          "score": 2.35,
          "reason": "tag:female_agency+text+tag:trope_misunderstanding",
          "tags": [
            "female_agency",
            "trope_misunderstanding"
          ]
        },
        {
          "step": 4,
          "score": 1.8,
          "reason": "text+tag:trope_misunderstanding",
          "tags": [
            "trope_misunderstanding"
          ]
        },
        {
          "step": 5,
          "score": 0.55,
          "reason": "tag:pacing",
          "tags": [
            "pacing"
          ]
        }
      ],
      "problems": [
        "step_miss:gold=4:pred=2",
        "dimension_miss:gold=trope_misunderstanding:pred=female_agency"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0017",
      "delayed_comment": "前面设定解释太密，后面节奏被拖住了。",
      "gold_step": 6,
      "predicted_step": 4,
      "gold_dimension": "lore_density",
      "predicted_dimension": "female_agency",
      "top_candidates": [
        {
          "step": 4,
          "score": 2.35,
          "reason": "tag:female_agency+text+tag:lore_density",
          "tags": [
            "female_agency",
            "lore_density"
          ]
        },
        {
          "step": 6,
          "score": 1.8,
          "reason": "text+tag:lore_density",
          "tags": [
            "lore_density"
          ]
        },
        {
          "step": 1,
          "score": 0.0,
          "reason": "weak_evidence",
          "tags": []
        }
      ],
      "problems": [
        "step_miss:gold=6:pred=4",
        "dimension_miss:gold=lore_density:pred=female_agency"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0034",
      "delayed_comment": "前面设定解释太密，后面节奏被拖住了。",
      "gold_step": 4,
      "predicted_step": 2,
      "gold_dimension": "lore_density",
      "predicted_dimension": "female_agency",
      "top_candidates": [
        {
          "step": 2,
          "score": 2.35,
          "reason": "tag:female_agency+text+tag:lore_density",
          "tags": [
            "female_agency",
            "lore_density"
          ]
        },
        {
          "step": 4,
          "score": 1.8,
          "reason": "text+tag:lore_density",
          "tags": [
            "lore_density"
          ]
        },
        {
          "step": 3,
          "score": 0.55,
          "reason": "tag:pacing",
          "tags": [
            "pacing"
          ]
        }
      ],
      "problems": [
        "step_miss:gold=4:pred=2",
        "dimension_miss:gold=lore_density:pred=female_agency"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0043",
      "delayed_comment": "读到后面才发现前面铺垫太拖，剧情推进慢了。",
      "gold_step": 4,
      "predicted_step": 2,
      "gold_dimension": "pacing",
      "predicted_dimension": "trope_misunderstanding",
      "top_candidates": [
        {
          "step": 2,
          "score": 2.35,
          "reason": "text+tag:pacing+tag:trope_misunderstanding",
          "tags": [
            "trope_misunderstanding",
            "pacing"
          ]
        },
        {
          "step": 3,
          "score": 1.8,
          "reason": "text+tag:pacing",
          "tags": [
            "pacing"
          ]
        },
        {
          "step": 4,
          "score": 1.8,
          "reason": "text+tag:pacing",
          "tags": [
            "pacing"
          ]
        }
      ],
      "problems": [
        "step_miss:gold=4:pred=2",
        "dimension_miss:gold=pacing:pred=trope_misunderstanding"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0050",
      "delayed_comment": "那个误会梗埋得太早，后面解释让我出戏。",
      "gold_step": 2,
      "predicted_step": 1,
      "gold_dimension": "trope_misunderstanding",
      "predicted_dimension": "pacing",
      "top_candidates": [
        {
          "step": 1,
          "score": 2.35,
          "reason": "tag:pacing+text+tag:trope_misunderstanding",
          "tags": [
            "pacing",
            "trope_misunderstanding"
          ]
        },
        {
          "step": 2,
          "score": 1.8,
          "reason": "text+tag:trope_misunderstanding",
          "tags": [
            "trope_misunderstanding"
          ]
        },
        {
          "step": 3,
          "score": 0.0,
          "reason": "weak_evidence",
          "tags": []
        }
      ],
      "problems": [
        "step_miss:gold=2:pred=1",
        "dimension_miss:gold=trope_misunderstanding:pred=pacing"
      ],
      "severity": 2.7
    }
  ],
  "concrete_problems": [
    {
      "episode_id": "trace_0008",
      "delayed_comment": "那个误会梗埋得太早，后面解释让我出戏。",
      "gold_step": 4,
      "predicted_step": 2,
      "gold_dimension": "trope_misunderstanding",
      "predicted_dimension": "female_agency",
      "top_candidates": [
        {
          "step": 2,
          "score": 2.35,
          "reason": "tag:female_agency+text+tag:trope_misunderstanding",
          "tags": [
            "female_agency",
            "trope_misunderstanding"
          ]
        },
        {
          "step": 4,
          "score": 1.8,
          "reason": "text+tag:trope_misunderstanding",
          "tags": [
            "trope_misunderstanding"
          ]
        },
        {
          "step": 5,
          "score": 0.55,
          "reason": "tag:pacing",
          "tags": [
            "pacing"
          ]
        }
      ],
      "problems": [
        "step_miss:gold=4:pred=2",
        "dimension_miss:gold=trope_misunderstanding:pred=female_agency"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0017",
      "delayed_comment": "前面设定解释太密，后面节奏被拖住了。",
      "gold_step": 6,
      "predicted_step": 4,
      "gold_dimension": "lore_density",
      "predicted_dimension": "female_agency",
      "top_candidates": [
        {
          "step": 4,
          "score": 2.35,
          "reason": "tag:female_agency+text+tag:lore_density",
          "tags": [
            "female_agency",
            "lore_density"
          ]
        },
        {
          "step": 6,
          "score": 1.8,
          "reason": "text+tag:lore_density",
          "tags": [
            "lore_density"
          ]
        },
        {
          "step": 1,
          "score": 0.0,
          "reason": "weak_evidence",
          "tags": []
        }
      ],
      "problems": [
        "step_miss:gold=6:pred=4",
        "dimension_miss:gold=lore_density:pred=female_agency"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0034",
      "delayed_comment": "前面设定解释太密，后面节奏被拖住了。",
      "gold_step": 4,
      "predicted_step": 2,
      "gold_dimension": "lore_density",
      "predicted_dimension": "female_agency",
      "top_candidates": [
        {
          "step": 2,
          "score": 2.35,
          "reason": "tag:female_agency+text+tag:lore_density",
          "tags": [
            "female_agency",
            "lore_density"
          ]
        },
        {
          "step": 4,
          "score": 1.8,
          "reason": "text+tag:lore_density",
          "tags": [
            "lore_density"
          ]
        },
        {
          "step": 3,
          "score": 0.55,
          "reason": "tag:pacing",
          "tags": [
            "pacing"
          ]
        }
      ],
      "problems": [
        "step_miss:gold=4:pred=2",
        "dimension_miss:gold=lore_density:pred=female_agency"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0043",
      "delayed_comment": "读到后面才发现前面铺垫太拖，剧情推进慢了。",
      "gold_step": 4,
      "predicted_step": 2,
      "gold_dimension": "pacing",
      "predicted_dimension": "trope_misunderstanding",
      "top_candidates": [
        {
          "step": 2,
          "score": 2.35,
          "reason": "text+tag:pacing+tag:trope_misunderstanding",
          "tags": [
            "trope_misunderstanding",
            "pacing"
          ]
        },
        {
          "step": 3,
          "score": 1.8,
          "reason": "text+tag:pacing",
          "tags": [
            "pacing"
          ]
        },
        {
          "step": 4,
          "score": 1.8,
          "reason": "text+tag:pacing",
          "tags": [
            "pacing"
          ]
        }
      ],
      "problems": [
        "step_miss:gold=4:pred=2",
        "dimension_miss:gold=pacing:pred=trope_misunderstanding"
      ],
      "severity": 2.7
    },
    {
      "episode_id": "trace_0050",
      "delayed_comment": "那个误会梗埋得太早，后面解释让我出戏。",
      "gold_step": 2,
      "predicted_step": 1,
      "gold_dimension": "trope_misunderstanding",
      "predicted_dimension": "pacing",
      "top_candidates": [
        {
          "step": 1,
          "score": 2.35,
          "reason": "tag:pacing+text+tag:trope_misunderstanding",
          "tags": [
            "pacing",
            "trope_misunderstanding"
          ]
        },
        {
          "step": 2,
          "score": 1.8,
          "reason": "text+tag:trope_misunderstanding",
          "tags": [
            "trope_misunderstanding"
          ]
        },
        {
          "step": 3,
          "score": 0.0,
          "reason": "weak_evidence",
          "tags": []
        }
      ],
      "problems": [
        "step_miss:gold=2:pred=1",
        "dimension_miss:gold=trope_misunderstanding:pred=pacing"
      ],
      "severity": 2.7
    }
  ],
  "data_eval_spec": {
    "dataset_name": "TRACE-USER-Bench synthetic delayed-feedback traces",
    "data_schema": "One row per multi-turn episode: turn trace, utility/implicit feedback, delayed comment, gold culprit step/dimension, counterfactual repairs.",
    "evaluation_protocol": "Rank culprit steps from the full trace, compare top prediction and reciprocal rank to gold, then estimate counterfactual repair gain and confidence calibration.",
    "metric_definitions": {
      "culprit_step_accuracy": "Exact-match accuracy for the delayed-feedback culprit step.",
      "culprit_dimension_accuracy": "Accuracy for the causal preference/content dimension.",
      "credit_mrr": "Mean reciprocal rank of the gold culprit step.",
      "repair_gain": "Mean expected utility gain from the selected counterfactual repair.",
      "credit_calibration": "One minus confidence error; higher means confidence tracks correctness."
    },
    "sample_count": 120,
    "metrics": {
      "culprit_step_accuracy": "Exact-match accuracy for the delayed-feedback culprit step.",
      "culprit_dimension_accuracy": "Accuracy for the causal preference/content dimension.",
      "credit_mrr": "Mean reciprocal rank of the gold culprit step.",
      "repair_gain": "Mean expected utility gain from the selected counterfactual repair.",
      "credit_calibration": "One minus confidence error; higher means confidence tracks correctness."
    },
    "splits": {
      "culprit_dimensions": {
        "lore_density": 27,
        "pacing": 35,
        "trope_misunderstanding": 32,
        "female_agency": 26
      }
    }
  },
  "metrics": {
    "round": 2,
    "culprit_step_accuracy": 0.65,
    "culprit_dimension_accuracy": 0.8917,
    "credit_mrr": 0.8167,
    "repair_gain": 0.1461,
    "counterfactual_repair_gain": 0.1461,
    "credit_calibration": 0.6277
  },
  "previous_metrics": {
    "round": 1,
    "culprit_step_accuracy": 0.0,
    "culprit_dimension_accuracy": 0.7917,
    "credit_mrr": 0.2863,
    "repair_gain": 0.076,
    "counterfactual_repair_gain": 0.076,
    "credit_calibration": 0.38
  },
  "metric_deltas": {
    "culprit_step_accuracy": 0.65,
    "culprit_dimension_accuracy": 0.10000000000000009,
    "credit_mrr": 0.5304,
    "repair_gain": 0.07010000000000001,
    "counterfactual_repair_gain": 0.07010000000000001,
    "credit_calibration": 0.24770000000000003
  }
}
