diff --git a/hwe/ts/defs/API/Message.ts b/hwe/ts/defs/API/Message.ts
index d8b5fd47..ad4d928b 100644
--- a/hwe/ts/defs/API/Message.ts
+++ b/hwe/ts/defs/API/Message.ts
@@ -31,6 +31,7 @@ export type MsgItem = {
     overwrite?: number[];
     hide?: boolean;
     silence?: boolean;
+    delete?: number;
   };
   time: string;
 };
diff --git a/hwe/ts/msg.ts b/hwe/ts/msg.ts
index f8ef59a4..2cad67a7 100644
--- a/hwe/ts/msg.ts
+++ b/hwe/ts/msg.ts
@@ -16,6 +16,7 @@ import { unwrap_any } from '@util/unwrap_any';
 import { setAxiosXMLHttpRequest } from '@util/setAxiosXMLHttpRequest';
 import { exportWindow } from '@util/exportWindow';
 import { SammoAPI } from './SammoAPI';
+import type { MsgItem, MsgResponse } from './defs/API/Message';
 
 const messageTemplate = `<div
     class="msg_plate msg_plate_<%msgType%> msg_plate_<%nationType%>"
@@ -94,16 +95,6 @@ type MsgTarget = {
     icon: string;
 }
 
-type MsgItem = {
-    id: number,
-    msgType: MsgType;
-    src: MsgTarget;
-    dest?: MsgTarget;
-    text: string,
-    option: Record<string, string | number>;
-    time: string;
-}
-
 type MsgPrintItem = MsgItem & {
     generalName: string;
     nationID: number;
@@ -119,16 +110,6 @@ type MsgPrintItem = MsgItem & {
     defaultIcon: string,
 }
 
-type MsgResponse = {
-    [v in MsgType]: MsgItem[];
-} & {
-    result: true;
-    keepRecent: boolean;
-    nationID: number;
-    generalName: string;
-    sequence: number;
-};
-
 type BasicGeneralTarget = {
     id: number,
     textName: string,