{
  "runtime": "3.12.14",
  "default_pairs": [
    [
      {
        "id": "A"
      },
      {
        "id": "A"
      }
    ],
    [
      {
        "id": "B"
      },
      {
        "id": "B"
      }
    ]
  ],
  "strict_pairs_before_error": [
    [
      {
        "id": "A"
      },
      {
        "id": "A"
      }
    ],
    [
      {
        "id": "B"
      },
      {
        "id": "B"
      }
    ]
  ],
  "strict_error": "ValueError",
  "staged_rejections": [
    "short",
    "same_length_wrong_identity",
    "duplicate_id",
    "missing_id"
  ],
  "committed_after_rejections": [],
  "valid_pairs": [
    [
      {
        "id": "A"
      },
      {
        "id": "A"
      }
    ],
    [
      {
        "id": "B"
      },
      {
        "id": "B"
      }
    ],
    [
      {
        "id": "C"
      },
      {
        "id": "C"
      }
    ]
  ],
  "empty_pairing": [],
  "scope": "strict catches length only and may already yield; local staging plus explicit ID check, no transactional/external effect guarantee."
}