diff --git a/apps/api/app/schemas/generation_task.py b/apps/api/app/schemas/generation_task.py
index b8ce60828..3951f5eb7 100755
--- a/apps/api/app/schemas/generation_task.py
+++ b/apps/api/app/schemas/generation_task.py
@@ -43,6 +43,11 @@ class CreateGenerationTaskRequest(BaseModel):
         default_factory=list,
         description="POST /generation/variant-plans 返回的各变体 plan_id（长度须=count）；为空则走服务端选片",
     )
+    # ── 文案库关联（#1894 标题库整合到文案库）──
+    script_id: str = Field(
+        default="",
+        description="关联的文案（script）ID；非空时从 script 读取 title_text/title_config 作为标题配置",
+    )
     # ── 标题配置（结构化）──
     title_config: dict | None = Field(
         default=None,
@@ -237,6 +242,11 @@ class CreatePreviewGenerationTaskRequest(BaseModel):
         default_factory=dict,
         description="标题配置（可选），渲染时烧录到预览视频中。支持字段: text/font/font_size/font_color/position/bold/stroke/shadow。N个变体时样式全局共用",
     )
+    # ── #1894: 关联文案，从 script 读取标题配置 ──
+    script_id: str = Field(
+        default="",
+        description="关联的文案（script）ID；非空时从 script 读取 title_text/title_config 作为标题配置",
+    )
     # ── 多变体独立配置（preview_count > 1）──
     # 长度 1 = 所有变体共用；长度 = preview_count = 每个变体独立；空数组 = 回退单值字段
     titles: list[str] = Field(