diff --git a/public/script.js b/public/script.js
index 941626660..877c932f5 100644
--- a/public/script.js
+++ b/public/script.js
@@ -174,7 +174,7 @@ import {
     saveBase64AsFile,
     uuidv4,
 } from './scripts/utils.js';
-import { debounce_timeout } from './scripts/constants.js';
+import { debounce_timeout, IGNORE_SYMBOL } from './scripts/constants.js';
 
 import { doDailyExtensionUpdatesCheck, extension_settings, initExtensions, loadExtensionSettings, runGenerationInterceptors, saveMetadataDebounced } from './scripts/extensions.js';
 import { COMMENT_NAME_DEFAULT, executeSlashCommandsOnChatInput, getSlashCommandsHelp, initDefaultSlashCommands, isExecutingCommandsFromChatInput, pauseScriptExecution, processChatSlashCommands, stopScriptExecution } from './scripts/slash-commands.js';
@@ -5295,6 +5295,7 @@ export function getBiasStrings(textareaText, type) {
  * @param {boolean} isInstruct Whether instruct mode is enabled.
  * @param {boolean|number} forceOutputSequence Whether to force the first/last output sequence for instruct mode.
  */
+
 function formatMessageHistoryItem(chatItem, isInstruct, forceOutputSequence) {
     const isNarratorType = chatItem?.extra?.type === system_message_types.NARRATOR;
     const characterName = chatItem?.name ? chatItem.name : name2;
@@ -5303,7 +5304,7 @@ function formatMessageHistoryItem(chatItem, isInstruct, forceOutputSequence) {
 
     // If this flag is set, completely ignore the message.
     // This can be used to hide messages without affecting the number of messages in the chat.
-    if (chatItem.extra?.ignore) {
+    if (chatItem.extra?.[IGNORE_SYMBOL]) {
         return '';
     }
 
diff --git a/public/scripts/constants.js b/public/scripts/constants.js
index f95a8e146..5daa7b1bc 100644
--- a/public/scripts/constants.js
+++ b/public/scripts/constants.js
@@ -14,3 +14,9 @@ export const debounce_timeout = {
     /** [5 sec] For delayed tasks, like auto-saving or completing batch operations that need a significant pause. */
     extended: 5000,
 };
+
+/*
+Used as an ephemeral key in message extra metadata.
+When set, the message will be excluded from context.
+ */
+export const IGNORE_SYMBOL = Symbol.for('ignore');
diff --git a/public/scripts/openai.js b/public/scripts/openai.js
index d2d4d978e..0f9ccc5ca 100644
--- a/public/scripts/openai.js
+++ b/public/scripts/openai.js
@@ -75,6 +75,7 @@ import { Popup, POPUP_RESULT } from './popup.js';
 import { t } from './i18n.js';
 import { ToolManager } from './tool-calling.js';
 import { accountStorage } from './util/AccountStorage.js';
+import {IGNORE_SYMBOL} from "./constants.js";
 
 export {
     openai_messages_count,
@@ -528,7 +529,7 @@ function setOpenAIMessages(chat) {
         let content = chat[j]['mes'];
 
         // If this flag is set, completely ignore the message
-        if (chat[j].extra?.ignore) {
+        if (chat[j].extra?.[IGNORE_SYMBOL]) {
             j++;
             continue;
         }