{
  "task_id": "pitch_001",
  "instruction_en": "Transpose measure 1 of staff 1 up by a major second while preserving rhythm.",
  "instruction_zh": "将第1小节第一谱表升高大二度，并保持节奏不变。",
  "status": "generated",
  "provider": "local_rule",
  "target_scope": {
    "measures": [
      1
    ],
    "staffs": [
      1
    ]
  },
  "protected_scope": {
    "staffs": [
      2
    ]
  },
  "checks": {
    "task_success": true,
    "complete_preservation": true,
    "correct_refusal": false
  },
  "changes": [
    {
      "event_id": "m1_rh_1",
      "fields": [
        "pitch"
      ],
      "before": {
        "pitch": "C4"
      },
      "after": {
        "pitch": "D4"
      }
    },
    {
      "event_id": "m1_rh_2",
      "fields": [
        "pitch"
      ],
      "before": {
        "pitch": "D4"
      },
      "after": {
        "pitch": "E4"
      }
    },
    {
      "event_id": "m1_rh_3",
      "fields": [
        "pitch"
      ],
      "before": {
        "pitch": "E4"
      },
      "after": {
        "pitch": "F#4"
      }
    },
    {
      "event_id": "m1_rh_4",
      "fields": [
        "pitch"
      ],
      "before": {
        "pitch": "G4"
      },
      "after": {
        "pitch": "A4"
      }
    }
  ],
  "original": "original.musicxml",
  "revision": "pitch_001.musicxml",
  "evidence": "pitch_001.json"
}