diff --git a/service/src/chatgpt.ts b/service/src/chatgpt.ts
index 1843e73..c3fca55 100644
--- a/service/src/chatgpt.ts
+++ b/service/src/chatgpt.ts
@@ -3,6 +3,11 @@ import 'isomorphic-fetch'
 import type { ChatGPTAPI, SendMessageOptions } from 'chatgpt'
 import { sendResponse } from './utils'
 
+export interface ChatContext {
+  conversationId?: string
+  parentMessageId?: string
+}
+
 dotenv.config()
 
 const apiKey = process.env.OPENAI_API_KEY