{
  "schema": "qref.qaoa-case/v1",
  "case_id": "qaoa-textbook-seed",
  "title": "QAOA MaxCut helpers",
  "description": "Qiskit textbook QAOA helpers (Qiskit 0.46.3 / Aer 0.14.2) and an earlier recorded Claude Sonnet research port (Qiskit 2.6.1 / Aer 0.18.0).",
  "origin": "real_migration",
  "reference": {
    "module": "../evidence/qaoa/legacy_functions.py",
    "pins": "../evidence/qaoa/legacy-requirements.txt",
    "receipt": {
      "kind": "upstream_extract",
      "upstream_url": "https://github.com/qiskit-community/qiskit-textbook/blob/0ae905083ec3872d7ddc6bb4001d5468f476d93f/content/ch-applications/qaoa.ipynb",
      "upstream_revision": "0ae905083ec3872d7ddc6bb4001d5468f476d93f",
      "upstream_path": "content/ch-applications/qaoa.ipynb",
      "extraction_scope": "Helper cell (maxcut_obj, compute_expectation, create_qaoa_circ, get_expectation) with its required imports added; not the whole notebook.",
      "attribution": "Qiskit textbook contributors",
      "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]]}
  ],
  "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, 17],
  "interpretation": {
    "objective": "negative_maxcut",
    "node_mapping": "node_i_is_qubit_i",
    "count_order": "qiskit_count_msb_left",
    "measurement": "terminal_identity"
  },
  "proposal": null
}