diff --git a/backend/app/services/scene_reference_service.py b/backend/app/services/scene_reference_service.py
index d6f9e545..a7be130d 100644
--- a/backend/app/services/scene_reference_service.py
+++ b/backend/app/services/scene_reference_service.py
@@ -1008,8 +1008,13 @@ class SceneReferenceService:
         composite 키로 '<char desc>, wearing <outfit desc>' 문자열을 추가.
 
         CharacterOutlook 쿼리 실패 시 warning log만 찍고 기본 short_id
-        map만 반환한다 (non-fatal). 기존 내부 로직과 동일한 fallback 순서
-        유지: t2i_prompt → description → name.
+        map만 반환한다 (non-fatal). fallback 순서: description → name.
+
+        ★계약 (2026-07-02): entity `t2i_prompt` 는 reference 이미지 생성 전용
+        프롬프트(스타일 래퍼: "Photorealistic product photo, isolated object,
+        plain neutral background" 등 포함)라 in-scene 치환 텍스트로 절대 사용
+        금지 — 씬 프롬프트 문장 중간에 스플라이스되면 스타일 지시 충돌로
+        부양 오브젝트/패널 콜라주 등 렌더 오염을 일으킨다.
 
         Returns: {short_id: description, 'C##O##': composite, ...}
         """
@@ -1019,7 +1024,7 @@ class SceneReferenceService:
         for e in entities:
             sid = e.get("short_id", "")
             if sid:
-                text_map[sid] = e.get("t2i_prompt") or e.get("description") or e.get("name", "")
+                text_map[sid] = e.get("description") or e.get("name", "")
 
         # C##O## 합성 키 (인물+아웃룩 설명 합침)
         try:
@@ -1033,12 +1038,8 @@ class SceneReferenceService:
                 ).first()
                 if char and outfit_ent and char.get("short_id") and outfit_ent.short_id:
                     ck = f"{char['short_id']}{outfit_ent.short_id}"
-                    char_desc = (
-                        char.get("t2i_prompt") or char.get("description") or char.get("name", "")
-                    )
-                    outfit_desc = (
-                        outfit_ent.t2i_prompt or outfit_ent.description or outfit_ent.name
-                    )
+                    char_desc = char.get("description") or char.get("name", "")
+                    outfit_desc = outfit_ent.description or outfit_ent.name
                     text_map[ck] = f"{char_desc}, wearing {outfit_desc}"
         except Exception as exc:
             logger.warning("Failed to build C##O## text map: %s", exc)
diff --git a/backend/tests/services/test_scene_reference_service.py b/backend/tests/services/test_scene_reference_service.py
index 7da04273..73f1c888 100644
--- a/backend/tests/services/test_scene_reference_service.py
+++ b/backend/tests/services/test_scene_reference_service.py
@@ -26,12 +26,13 @@ def svc() -> SceneReferenceService:
 
 
 def test_build_entity_text_map_basic_short_ids(svc):
-    """short_id 기반 fallback: t2i_prompt → description → name (B.16)."""
+    """short_id 기반 fallback: description → name — t2i_prompt 미사용 (2026-07-02 계약)."""
     # CharacterOutlook 조회는 빈 리스트로 (composite 키 생성 없음)
     svc._db.query.return_value.filter.return_value.all.return_value = []
 
     entities = [
-        {"id": "e1", "short_id": "C01", "t2i_prompt": "korean woman, 30s"},
+        {"id": "e1", "short_id": "C01", "t2i_prompt": "REF_GEN_ONLY portrait prompt",
+         "description": "korean woman, 30s"},
         {"id": "e2", "short_id": "L05", "description": "traditional kitchen"},
         {"id": "e3", "short_id": "P03", "name": "wooden cane"},
         {"id": "e4", "short_id": "", "t2i_prompt": "skipped"},  # no short_id → skip
@@ -44,8 +45,31 @@ def test_build_entity_text_map_basic_short_ids(svc):
     assert "" not in result
 
 
+def test_build_entity_text_map_never_uses_t2i_prompt(svc):
+    """★계약: ref 생성용 t2i_prompt 는 in-scene 치환 텍스트로 절대 미사용.
+
+    (필드 선택 순서 검증 — 문자열 의미 판정 아님.) t2i_prompt 만 있고
+    description/name 이 비면 빈 문자열로 남는다(스타일 래퍼 스플라이스 금지).
+    """
+    svc._db.query.return_value.filter.return_value.all.return_value = []
+
+    entities = [
+        {"id": "e1", "short_id": "P01", "t2i_prompt": "REF_GEN_ONLY product shot",
+         "description": "generic modern smartphone", "name": "휴대전화"},
+        {"id": "e2", "short_id": "P02", "t2i_prompt": "REF_GEN_ONLY product shot",
+         "name": "메모지"},
+        {"id": "e3", "short_id": "P03", "t2i_prompt": "REF_GEN_ONLY product shot"},
+    ]
+    result = svc.build_entity_text_map(entities)
+
+    assert result["P01"] == "generic modern smartphone"  # description-first
+    assert result["P02"] == "메모지"                      # name fallback
+    assert result["P03"] == ""                            # t2i_prompt 로 안 떨어짐
+    assert all("REF_GEN_ONLY" not in v for v in result.values())
+
+
 def test_build_entity_text_map_composite_keys_from_outlook(svc):
-    """CharacterOutlook 링크 → C##O## 합성 키 생성 (B.16)."""
+    """CharacterOutlook 링크 → C##O## 합성 키 생성 (B.16, description-first)."""
     co = MagicMock()
     co.character_id = "c_uuid"
     co.outlook_id = "o_uuid"
@@ -53,8 +77,8 @@ def test_build_entity_text_map_composite_keys_from_outlook(svc):
     outfit = MagicMock()
     outfit.id = "o_uuid"
     outfit.short_id = "O02"
-    outfit.t2i_prompt = "green hanbok"
-    outfit.description = None
+    outfit.t2i_prompt = "REF_GEN_ONLY outfit sheet"
+    outfit.description = "green hanbok"
     outfit.name = None
 
     # 첫 query: CharacterOutlook.filter().all() → [co]
@@ -66,7 +90,8 @@ def test_build_entity_text_map_composite_keys_from_outlook(svc):
     svc._db.query.return_value = outer_query
 
     entities = [
-        {"id": "c_uuid", "short_id": "C01", "t2i_prompt": "korean woman"},
+        {"id": "c_uuid", "short_id": "C01", "t2i_prompt": "REF_GEN_ONLY portrait",
+         "description": "korean woman"},
     ]
     result = svc.build_entity_text_map(entities)