diff --git a/src/modules/scripting/Application/Services/ScriptTypeRegistry.cs b/src/modules/scripting/Application/Services/ScriptTypeRegistry.cs
index 4f84795..69575e0 100644
--- a/src/modules/scripting/Application/Services/ScriptTypeRegistry.cs
+++ b/src/modules/scripting/Application/Services/ScriptTypeRegistry.cs
@@ -14,6 +14,16 @@ public class ScriptTypeRegistry
 {
     private readonly ConcurrentDictionary<string, ScriptTypeMeta> _types = new();
 
+    /// <summary>
+    /// 业务模块程序集前缀白名单。脚本编辑器应能调用的 CQRS 入口集中在各业务模块的 Application 层；
+    /// 命名约定为 <c>&lt;Module&gt;.Application/Domain/Infrastructure</c>，模块根名如下。
+    /// 注意：rag 模块与共享层使用 <c>BuildFlow.</c> 前缀，故 BuildFlow 也纳入。
+    /// </summary>
+    private static readonly string[] _modulePrefixes =
+    {
+        "Platform", "Workflow", "Scripting", "File", "IM", "Rag", "BuildFlow"
+    };
+
     /// <summary>执行（或刷新）扫描。幂等：重复调用会重建字典。</summary>
     public void Scan()
     {
@@ -21,11 +31,7 @@ public class ScriptTypeRegistry
         foreach (var asm in AppDomain.CurrentDomain.GetAssemblies())
         {
             var name = asm.GetName().Name ?? string.Empty;
-            if (!name.StartsWith("BuildFlow", StringComparison.Ordinal)) continue;
-            // 排除测试与基础设施程序集：脚本沙箱内无法引用这些类型，列出它们只会误导用户
-            if (name.EndsWith(".Tests", StringComparison.Ordinal)) continue;
-            if (name.EndsWith(".Test", StringComparison.Ordinal)) continue;
-            if (name.EndsWith(".Infrastructure", StringComparison.Ordinal)) continue;
+            if (!IsBusinessModuleAssembly(name)) continue;
 
             Type[] types;
             try { types = asm.GetTypes(); }
@@ -47,6 +53,27 @@ public class ScriptTypeRegistry
         foreach (var m in found) _types[m.FullName] = m;
     }
 
+    /// <summary>
+    /// 判定程序集是否属于业务模块（而非框架/测试/宿主/基础设施）。
+    /// 脚本沙箱内无法引用 Infrastructure 类型，故一并排除，避免方法面板列出不可达类型。
+    /// </summary>
+    private static bool IsBusinessModuleAssembly(string name)
+    {
+        if (string.IsNullOrEmpty(name)) return false;
+        // 排除测试与基础设施程序集
+        if (name.EndsWith(".Tests", StringComparison.Ordinal)) return false;
+        if (name.EndsWith(".Test", StringComparison.Ordinal)) return false;
+        if (name.EndsWith(".Infrastructure", StringComparison.Ordinal)) return false;
+        // 宿主程序集本身不含可调用的 request 类型，且脚本不应耦合端点层
+        if (name.EndsWith(".Host", StringComparison.Ordinal)) return false;
+        // 必须匹配某个业务模块前缀（"Prefix." 或恰好等于 "Prefix"）
+        foreach (var p in _modulePrefixes)
+        {
+            if (name == p || name.StartsWith(p + ".", StringComparison.Ordinal)) return true;
+        }
+        return false;
+    }
+
     private static ScriptTypeMeta BuildMeta(Type type)
     {
         var props = type.GetProperties(BindingFlags.Public | BindingFlags.Instance)