diff --git a/python-api/app/ai/prompts/__init__.py b/python-api/app/ai/prompts/__init__.py
index 15f98eb..c3ca14d 100644
--- a/python-api/app/ai/prompts/__init__.py
+++ b/python-api/app/ai/prompts/__init__.py
@@ -11,8 +11,11 @@ Prompt 模板系统
     # 获取分类列表
     categories = list_categories()
 
-    # 加载 System Prompt（大类+小类，随机取一个）
-    system = load_system_prompt("bk", "ht")
+    # 扫描某分类下的所有提示词文件
+    files = list_prompt_files("bk")
+
+    # 加载指定文件的 System Prompt
+    system = load_prompt_file("bk", "水电改造避坑——水电改造的4个坑.txt")
 
     # 加载并渲染 User Prompt
     user = load_script_user_prompt(
@@ -24,7 +27,9 @@ from .loader import (
     PolishPromptBuilder,
     ScriptPromptBuilder,
     list_categories,
+    list_prompt_files,
     load_prompt,
+    load_prompt_file,
     load_script_user_prompt,
     load_system_prompt,
     render_template,
@@ -36,6 +41,8 @@ __all__ = [
     "load_system_prompt",
     "load_script_user_prompt",
     "list_categories",
+    "list_prompt_files",
+    "load_prompt_file",
     "ScriptPromptBuilder",
     "PolishPromptBuilder",
 ]
diff --git a/tauri-app/src/api/modules/script.ts b/tauri-app/src/api/modules/script.ts
index 9a85cb5..30ce3fb 100644
--- a/tauri-app/src/api/modules/script.ts
+++ b/tauri-app/src/api/modules/script.ts
@@ -40,7 +40,7 @@ interface GenerateTitleResponse {
 /**
  * 脚本相关 API
  */
-const CATEGORIES_CACHE_KEY = 'script-categories-v1';
+const CATEGORIES_CACHE_KEY = 'script-categories-v2';
 
 export const scriptApi = {
   /**
diff --git a/tauri-app/src/utils/projectMeta.ts b/tauri-app/src/utils/projectMeta.ts
index 014aa83..a12352e 100644
--- a/tauri-app/src/utils/projectMeta.ts
+++ b/tauri-app/src/utils/projectMeta.ts
@@ -122,6 +122,11 @@ export function migrateMeta(raw: unknown): Partial<ProjectMeta> {
     return { ...obj, version: 1 } as Partial<ProjectMeta>;
   }
 
+  // 清理已废弃字段
+  if ('subcategoryCode' in obj) {
+    delete (obj as Record<string, unknown>).subcategoryCode;
+  }
+
   // 当前版本，无需迁移
   return obj as Partial<ProjectMeta>;
 }