{
  "schema": "qref.qaoa-case/v1",
  "case_id": "qaoa-positive-control",
  "title": "QAOA helpers \u2014 positive control (same port on both sides)",
  "description": "The research port runs as both reference and target in the pinned Qiskit 2.6.1 environment. Expected: no differences. Includes an 8-qubit graph with an isolated node.",
  "origin": "positive_control",
  "reference": {
    "module": "../evidence/qaoa/port_functions.py",
    "pins": "../evidence/qaoa/modern-requirements.txt",
    "receipt": {
      "kind": "local_code",
      "upstream_url": null,
      "upstream_revision": null,
      "upstream_path": null,
      "extraction_scope": "Research port used unchanged as the control reference.",
      "attribution": "Qiskit textbook contributors (derived work)",
      "license_spdx": "Apache-2.0",
      "license_file": "../evidence/qaoa/LICENSE.txt",
      "derived_from_sha256": null
    }
  },
  "target": {
    "module": "../evidence/qaoa/port_functions.py",
    "pins": "../evidence/qaoa/modern-requirements.txt",
    "receipt": {
      "kind": "local_code",
      "upstream_url": null,
      "upstream_revision": null,
      "upstream_path": null,
      "extraction_scope": "Earlier research port of the reference helpers. Its model notes are not bound to this case, so no model attribution is claimed.",
      "attribution": "Qiskit textbook contributors (derived work)",
      "license_spdx": "Apache-2.0",
      "license_file": "../evidence/qaoa/LICENSE.txt",
      "derived_from_sha256": null
    }
  },
  "graphs": [
    {
      "id": "textbook_cycle4",
      "nodes": [
        0,
        1,
        2,
        3
      ],
      "edges": [
        [
          0,
          1
        ],
        [
          1,
          2
        ],
        [
          2,
          3
        ],
        [
          3,
          0
        ]
      ]
    },
    {
      "id": "asymmetric4",
      "nodes": [
        0,
        1,
        2,
        3
      ],
      "edges": [
        [
          0,
          1
        ],
        [
          1,
          2
        ],
        [
          2,
          3
        ],
        [
          0,
          2
        ]
      ]
    },
    {
      "id": "cycle5",
      "nodes": [
        0,
        1,
        2,
        3,
        4
      ],
      "edges": [
        [
          0,
          1
        ],
        [
          1,
          2
        ],
        [
          2,
          3
        ],
        [
          3,
          4
        ],
        [
          4,
          0
        ]
      ]
    },
    {
      "id": "ring7_isolated8",
      "nodes": [
        0,
        1,
        2,
        3,
        4,
        5,
        6,
        7
      ],
      "edges": [
        [
          0,
          1
        ],
        [
          1,
          2
        ],
        [
          2,
          3
        ],
        [
          3,
          4
        ],
        [
          4,
          5
        ],
        [
          5,
          6
        ],
        [
          6,
          0
        ],
        [
          0,
          3
        ]
      ]
    }
  ],
  "angles": [
    {
      "id": "p1-a",
      "theta": [
        0.17,
        0.63
      ]
    },
    {
      "id": "p1-b",
      "theta": [
        0.81,
        0.29
      ]
    },
    {
      "id": "p2",
      "theta": [
        0.17,
        0.63,
        0.41,
        0.92
      ]
    }
  ],
  "shots": [
    512
  ],
  "interpretation": {
    "objective": "negative_maxcut",
    "node_mapping": "node_i_is_qubit_i",
    "count_order": "qiskit_count_msb_left",
    "measurement": "terminal_identity"
  },
  "proposal": null
}