diff --git a/src/framework/chef.c b/src/framework/chef.c
index ab9e607..ee53f1c 100644
--- a/src/framework/chef.c
+++ b/src/framework/chef.c
@@ -5,7 +5,7 @@
  * File Authors  : @ccmywish
  * Contributors  : @BingChunMoLi
  * Created On    : <2025-08-09>
- * Last Modified : <2026-01-21>
+ * Last Modified : <2026-02-24>
  *
  * chef DSL: for chefs (recipe makers) to define a target
  * ------------------------------------------------------------*/
@@ -341,6 +341,21 @@ chef_set_default_scope (Target_t *target, Scope_t scope)
 }
 
 
+/**
+ * @brief 由于操作系统相关的 target 换源都是系统级，所以 scope 都是固定的，我们提供此快捷函数来设置
+ */
+void
+chef_set_os_scope (Target_t *target)
+{
+  xy_cant_be_null (target);
+
+  chef_set_scope_cap (target, ProjectScope, ScopeCap_Unable);
+  chef_set_scope_cap (target, UserScope,    ScopeCap_Unable);
+  chef_set_scope_cap (target, SystemScope,  ScopeCap_Able_And_Implemented);
+
+  chef_set_default_scope (target, SystemScope);
+}
+
 
 void
 chef_allow_local_mode (Target_t *target, Capability_t cap, const char *explain_zh, const char *explain_en)