{
  "_doc": "Task 6 of single-vs-batch reference contract fix — regression fixture (S8/S13/S15/S19/S21).",
  "_spec": "docs/superpowers/specs/2026-05-08-single-batch-reference-contract-design.md §5.2",
  "_non_goals": "샷별 prompt 수동 보정 X. 실제 이미지 재생성 X. DB 25 still 건드리지 X. fixture 는 contract 검증용.",
  "project_id": "80f62523-775f-4893-9388-d67b17a4339c",
  "episode_id": "9a5e0862-f0fd-4f21-9373-ffc60482ebe4",
  "stills": [
    {
      "still_id": "b6662ce1-a38c-4469-8fb6-681d208667d5",
      "label": "S8_Shot4",
      "scene_index": 8,
      "shot_index": 4,
      "visible_short_ids": ["C01", "P03", "L08", "L09", "L10"],
      "expected_actual_ref_labels": [
        "character C01O02 in outfit",
        "BACKGROUND chain reference"
      ],
      "is_close_framing": false,
      "user_reported_defect": "출입문이 아닌 사람을 가리킴",
      "root_cause": "단건 경로 bg chain ref 누락 (D1) + 'from the reference' phantom (D4)",
      "task_4_relevant": false
    },
    {
      "still_id": "e75673a1-8484-4062-96e0-5437270e9392",
      "label": "S13_Shot6",
      "scene_index": 13,
      "shot_index": 6,
      "visible_short_ids": ["C01", "C02", "L11"],
      "expected_actual_ref_labels": [
        "character C01O02 in outfit",
        "character C02O03 in outfit"
      ],
      "is_close_framing": true,
      "user_reported_defect": "캐릭터 누락 (No reference images)",
      "root_cause": "face close-up exemption 과다 (D3) → labeled_refs=[]",
      "task_4_relevant": true,
      "expected_failure_mode_pre_fix": "labeled_refs=[] silent (No reference images.)",
      "expected_failure_mode_post_fix": "RefContractError (ref_contract.violation) HTTP 422",
      "expect_fail_fast": true,
      "expected_error_code": "ref_contract.violation",
      "expected_error_message_contains": "required character_outlook ref missing",
      "actual_refs_stale_note": "stale actual=[] from old silent-skip llm_call_log entry — fail-fast does not write a new log row, so the latest entry is the pre-fix silent skip. canary verifies fail-fast by dry-run validate_attached_refs (RPC lookup + stale labeled_refs)."
    },
    {
      "still_id": "f6675640-c03a-43dc-9030-4e3445005f68",
      "label": "S15_Shot5",
      "scene_index": 15,
      "shot_index": 5,
      "visible_short_ids": ["C01", "C02", "L12"],
      "expected_actual_ref_labels": [
        "character C02O03 in outfit",
        "character C01O02 in outfit",
        "previous shot SAME ROOM"
      ],
      "is_close_framing": false,
      "user_reported_defect": "달리는 방향 90도 빗나감",
      "root_cause": "단건 경로 prev_shot_ref 누락 (D1) → 공간 anchor 약화",
      "task_4_relevant": false
    },
    {
      "still_id": "4213ed6b-b4e2-4587-b6a0-251a7f3e9544",
      "label": "S19_Shot1",
      "scene_index": 19,
      "shot_index": 1,
      "visible_short_ids": ["C01", "P03", "L09", "L10"],
      "expected_actual_ref_labels": [
        "character C01O02 in outfit",
        "BACKGROUND chain reference"
      ],
      "is_close_framing": false,
      "user_reported_defect": "바퀴/핸들 정면 이상",
      "root_cause": "단건 경로 bg chain ref 누락 (D1) + 'from the reference' phantom (D4)",
      "task_4_relevant": false
    },
    {
      "still_id": "a1a94038-e071-4735-b5ae-dfe78c2fead3",
      "label": "S21_Shot6",
      "scene_index": 21,
      "shot_index": 6,
      "visible_short_ids": ["C01", "P09", "P07", "L13"],
      "expected_actual_ref_labels_p0": [
        "character C01O02 in outfit",
        "BACKGROUND chain reference"
      ],
      "expected_actual_ref_labels_p0_5_followup": [
        "character C01O02 in outfit",
        "BACKGROUND chain reference",
        "object P09",
        "object P07"
      ],
      "is_close_framing": true,
      "user_reported_defect": "책상 위 사진 없음",
      "root_cause": "단건 경로 bg + prop ref 누락 (D1). narrative-critical prop carry 는 P0-5 후속.",
      "task_4_relevant": false,
      "note": "본 spec scope 는 character + bg 만 검증. P09/P07 prop ref 보강 = P0-5 후속 (별도 spec)."
    }
  ]
}