diff --git a/packages/core/src/plugins/helper.ts b/packages/core/src/plugins/helper.ts
index 420eccb..1c32122 100644
--- a/packages/core/src/plugins/helper.ts
+++ b/packages/core/src/plugins/helper.ts
@@ -1,7 +1,47 @@
-import { InterfacePlugin } from '@idraw/types';
+import {
+  InterfaceHelperPlugin, TypeHelperPluginEventDetail,
+  TypeHelperPluginEventResult,
+} from '@idraw/types';
+import util from '@idraw/util';
+
+
+export class HelperPlugin implements Required<InterfaceHelperPlugin> {
+
+  readonly name: string = 'helper-plugin';
+
+  readonly uuid: string;
 
-export class HelperPlugin implements InterfacePlugin {
   constructor() {
     // TODO
+    this.uuid = util.uuid.createUUID();
   }
+
+  onHover(detail: TypeHelperPluginEventDetail): void | TypeHelperPluginEventResult {
+    if (detail.controller === null) {
+      
+    }
+  }
+
+  onPoint(detail: TypeHelperPluginEventDetail): void | TypeHelperPluginEventResult {
+    
+  }
+
+  onClick(detail: TypeHelperPluginEventDetail): void | TypeHelperPluginEventResult {
+    
+  }
+
+
+  onMoveStart(detail: TypeHelperPluginEventDetail): void | TypeHelperPluginEventResult {
+    
+  }
+
+  onMove(detail: TypeHelperPluginEventDetail): void | TypeHelperPluginEventResult {
+    
+
+  }
+
+  onMoveEnd(detail: TypeHelperPluginEventDetail): void | TypeHelperPluginEventResult {
+    
+  }
+  
 }
\ No newline at end of file
diff --git a/packages/types/src/lib/plugin.ts b/packages/types/src/lib/plugin.ts
index 222152a..35fcd3c 100644
--- a/packages/types/src/lib/plugin.ts
+++ b/packages/types/src/lib/plugin.ts
@@ -3,36 +3,34 @@ import { TypeElemDesc, TypeElement } from './element';
 import { TypeContext } from './context';
 import { TypePoint, TypePointCursor } from './board';
 
+export type TypeHelperPluginEventDetail = {
+  controller: string | null,
+  point: TypePoint,
+  selectedElement: TypeElement<keyof TypeElemDesc> | null,
+  data: TypeData, 
+  helperCtx:TypeContext,
+}
 
-export interface InterfacePlugin {
-  onHover?: (detail: {
-    point: TypePoint,
-    selectedElement: TypeElement<keyof TypeElemDesc> | null,
-    data: TypeData, 
-    helperCtx:TypeContext,
-  }) => void | { cursor?: TypePointCursor };
-  onClick?: (detail: {
-    point: TypePoint,
-    selectedElement: TypeElement<keyof TypeElemDesc> | null,
-    data: TypeData, 
-    helperCtx:TypeContext
-  }) => void;
-  onMoveStart?: (detail: {
-    point: TypePoint,
-    selectedElement: TypeElement<keyof TypeElemDesc> | null,
-    data: TypeData, 
-    helperCtx:TypeContext
-  }) => void;
-  onMove?: (detail: {
-    point: TypePoint,
-    selectedElement: TypeElement<keyof TypeElemDesc> | null,
-    data: TypeData, 
-    helperCtx:TypeContext
-  }) => void;
-  onMoveEnd?: (detail: {
-    point: TypePoint,
-    selectedElement?: TypeElement<keyof TypeElemDesc> | null,
-    data: TypeData, 
-    helperCtx:TypeContext
-  }) => void;
+export type TypeHelperPluginEventResult = {
+  cursor?: TypePointCursor,
+  beController?: boolean;
+}
+
+export interface InterfaceHelperPlugin {
+
+  readonly name?: string;
+
+  readonly uuid?: string;
+ 
+  onHover?: (detail: TypeHelperPluginEventDetail) => void | TypeHelperPluginEventResult;
+
+  onPoint?: (detail: TypeHelperPluginEventDetail) => void | TypeHelperPluginEventResult;
+
+  onClick?: (detail: TypeHelperPluginEventDetail) => void | TypeHelperPluginEventResult;
+
+  onMoveStart?: (detail: TypeHelperPluginEventDetail) => void | TypeHelperPluginEventResult;
+
+  onMove?: (detail: TypeHelperPluginEventDetail) => void | TypeHelperPluginEventResult;
+
+  onMoveEnd?: (detail: TypeHelperPluginEventDetail) => void | TypeHelperPluginEventResult;
 }
\ No newline at end of file