diff --git a/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.md b/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.md
index 4f239cbb40..c53b94d56c 100644
--- a/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.md
+++ b/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.md
@@ -4,6 +4,118 @@ The actual snapshot is saved in `copilot.spec.ts.snap`.
 
 Generated by [AVA](https://avajs.dev).
 
+## should be able to manage chat session
+
+> should generate the final message
+
+    [
+      {
+        content: 'hello world',
+        params: {
+          word: 'world',
+        },
+        role: 'system',
+      },
+      {
+        content: 'hello',
+        role: 'user',
+      },
+    ]
+
+> should generate different message with another params
+
+    [
+      {
+        content: 'hello world',
+        params: {
+          word: 'world',
+        },
+        role: 'system',
+      },
+      {
+        content: 'hello',
+        role: 'user',
+      },
+    ]
+
+## should be able to fork chat session
+
+> should generate the final message
+
+    [
+      {
+        content: 'hello world',
+        params: {
+          word: 'world',
+        },
+        role: 'system',
+      },
+      {
+        content: 'hello',
+        params: {},
+        role: 'user',
+      },
+      {
+        content: 'world',
+        params: {},
+        role: 'assistant',
+      },
+    ]
+
+> should generate the final message
+
+    [
+      {
+        content: 'hello world',
+        params: {
+          word: 'world',
+        },
+        role: 'system',
+      },
+      {
+        content: 'hello',
+        params: {},
+        role: 'user',
+      },
+      {
+        content: 'world',
+        params: {},
+        role: 'assistant',
+      },
+    ]
+
+> should generate the final message
+
+    [
+      {
+        content: 'hello world',
+        params: {
+          word: 'world',
+        },
+        role: 'system',
+      },
+      {
+        content: 'hello',
+        params: {},
+        role: 'user',
+      },
+      {
+        content: 'world',
+        params: {},
+        role: 'assistant',
+      },
+      {
+        content: 'aaa',
+        params: {},
+        role: 'user',
+      },
+      {
+        content: 'bbb',
+        params: {},
+        role: 'assistant',
+      },
+    ]
+
 ## should revert message correctly
 
 > should have three messages before revert
diff --git a/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.snap b/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.snap
index 516503db91..887ca9407d 100644
Binary files a/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.snap and b/packages/backend/server/src/__tests__/__snapshots__/copilot.spec.ts.snap differ
diff --git a/packages/backend/server/src/__tests__/copilot.spec.ts b/packages/backend/server/src/__tests__/copilot.spec.ts
index 85e435b63e..a93a4b1da0 100644
--- a/packages/backend/server/src/__tests__/copilot.spec.ts
+++ b/packages/backend/server/src/__tests__/copilot.spec.ts
@@ -241,35 +241,31 @@ test('should be able to manage chat session', async t => {
   t.is(s.config.promptName, 'prompt', 'should have prompt name');
   t.is(s.model, 'model', 'should have model');
 
+  const cleanObject = (obj: any[]) =>
+    JSON.parse(
+      JSON.stringify(obj, (k, v) =>
+        ['id', 'attachments', 'createdAt'].includes(k) ||
+        v === null ||
+        (typeof v === 'object' && !Object.keys(v).length)
+          ? undefined
+          : v
+      )
+    );
+
   s.push({ role: 'user', content: 'hello', createdAt: new Date() });
-  // @ts-expect-error
-  const finalMessages = s.finish(params).map(({ createdAt: _, ...m }) => m);
-  t.deepEqual(
-    finalMessages,
-    [
-      { content: 'hello world', params, role: 'system' },
-      { content: 'hello', role: 'user' },
-    ],
-    'should generate the final message'
-  );
+
+  const finalMessages = cleanObject(s.finish(params));
+  t.snapshot(finalMessages, 'should generate the final message');
   await s.save();
 
   const s1 = (await session.get(sessionId))!;
   t.deepEqual(
-    s1
-      .finish(params)
-      // @ts-expect-error
-      .map(({ id: _, attachments: __, createdAt: ___, ...m }) => m),
+    cleanObject(s1.finish(params)),
     finalMessages,
     'should same as before message'
   );
-  t.deepEqual(
-    // @ts-expect-error
-    s1.finish({}).map(({ id: _, attachments: __, createdAt: ___, ...m }) => m),
-    [
-      { content: 'hello ', params: {}, role: 'system' },
-      { content: 'hello', role: 'user' },
-    ],
+  t.snapshot(
+    cleanObject(s1.finish(params)),
     'should generate different message with another params'
   );
 
@@ -366,22 +362,19 @@ test('should be able to fork chat session', async t => {
     'should fork new session with same params'
   );
 
+  const cleanObject = (obj: any[]) =>
+    JSON.parse(
+      JSON.stringify(obj, (k, v) =>
+        ['id', 'createdAt'].includes(k) || v === null ? undefined : v
+      )
+    );
+
   // check forked session messages
   {
     const s2 = (await session.get(forkedSessionId1))!;
 
-    const finalMessages = s2
-      .finish(params) // @ts-expect-error
-      .map(({ id: _, attachments: __, createdAt: ___, ...m }) => m);
-    t.deepEqual(
-      finalMessages,
-      [
-        { role: 'system', content: 'hello world', params },
-        { role: 'user', content: 'hello' },
-        { role: 'assistant', content: 'world' },
-      ],
-      'should generate the final message'
-    );
+    const finalMessages = s2.finish(params);
+    t.snapshot(cleanObject(finalMessages), 'should generate the final message');
   }
 
   // check second times forked session
@@ -391,38 +384,16 @@ test('should be able to fork chat session', async t => {
     // should overwrite user id
     t.is(s2.config.userId, newUser.id, 'should have same user id');
 
-    const finalMessages = s2
-      .finish(params) // @ts-expect-error
-      .map(({ id: _, attachments: __, createdAt: ___, ...m }) => m);
-    t.deepEqual(
-      finalMessages,
-      [
-        { role: 'system', content: 'hello world', params },
-        { role: 'user', content: 'hello' },
-        { role: 'assistant', content: 'world' },
-      ],
-      'should generate the final message'
-    );
+    const finalMessages = s2.finish(params);
+    t.snapshot(cleanObject(finalMessages), 'should generate the final message');
   }
 
   // check original session messages
   {
     const s3 = (await session.get(sessionId))!;
 
-    const finalMessages = s3
-      .finish(params) // @ts-expect-error
-      .map(({ id: _, attachments: __, createdAt: ___, ...m }) => m);
-    t.deepEqual(
-      finalMessages,
-      [
-        { role: 'system', content: 'hello world', params },
-        { role: 'user', content: 'hello' },
-        { role: 'assistant', content: 'world' },
-        { role: 'user', content: 'aaa' },
-        { role: 'assistant', content: 'bbb' },
-      ],
-      'should generate the final message'
-    );
+    const finalMessages = s3.finish(params);
+    t.snapshot(cleanObject(finalMessages), 'should generate the final message');
   }
 
   // should get main session after fork if re-create a chat session for same docId and workspaceId
@@ -612,7 +583,11 @@ test('should revert message correctly', async t => {
   const cleanObject = (obj: any[]) =>
     JSON.parse(
       JSON.stringify(obj, (k, v) =>
-        ['id', 'createdAt'].includes(k) || v === null ? undefined : v
+        ['id', 'createdAt'].includes(k) ||
+        v === null ||
+        (typeof v === 'object' && !Object.keys(v).length)
+          ? undefined
+          : v
       )
     );
 
diff --git a/packages/backend/server/src/plugins/copilot/controller.ts b/packages/backend/server/src/plugins/copilot/controller.ts
index 658a3d2b2c..2d2c1a480c 100644
--- a/packages/backend/server/src/plugins/copilot/controller.ts
+++ b/packages/backend/server/src/plugins/copilot/controller.ts
@@ -48,7 +48,7 @@ import { CurrentUser, Public } from '../../core/auth';
 import { CopilotProviderService } from './providers';
 import { ChatSession, ChatSessionService } from './session';
 import { CopilotStorage } from './storage';
-import { CopilotCapability, CopilotTextProvider } from './types';
+import { ChatMessage, CopilotCapability, CopilotTextProvider } from './types';
 import { CopilotWorkflowService, GraphExecutorState } from './workflow';
 
 export interface ChatEvent {
@@ -141,24 +141,28 @@ export class CopilotController implements BeforeApplicationShutdown {
     sessionId: string,
     messageId?: string,
     retry = false
-  ): Promise<ChatSession> {
+  ): Promise<[ChatMessage | undefined, ChatSession]> {
     const session = await this.chatSession.get(sessionId);
     if (!session) {
       throw new CopilotSessionNotFound();
     }
 
+    let latestMessage = undefined;
     if (!messageId || retry) {
       // revert the latest message generated by the assistant
       // if messageId is provided, we will also revert latest user message
       await this.chatSession.revertLatestMessage(sessionId, !!messageId);
       session.revertLatestMessage(!!messageId);
+      if (!messageId) {
+        latestMessage = session.latestUserMessage;
+      }
     }
 
     if (messageId) {
       await session.pushByMessageId(messageId);
     }
 
-    return session;
+    return [latestMessage, session];
   }
 
   private prepareParams(params: Record<string, string | string[]>) {
@@ -226,7 +230,7 @@ export class CopilotController implements BeforeApplicationShutdown {
         messageId
       );
 
-      const session = await this.appendSessionMessage(
+      const [latestMessage, session] = await this.appendSessionMessage(
         sessionId,
         messageId,
         retry
@@ -234,6 +238,14 @@ export class CopilotController implements BeforeApplicationShutdown {
 
       info.model = session.model;
       metrics.ai.counter('chat_calls').add(1, { model: session.model });
+
+      if (latestMessage) {
+        params = Object.assign({}, params, latestMessage.params, {
+          content: latestMessage.content,
+          attachments: latestMessage.attachments,
+        });
+      }
+
       const finalMessage = session.finish(params);
       info.finalMessage = finalMessage;
 
@@ -281,14 +293,22 @@ export class CopilotController implements BeforeApplicationShutdown {
         messageId
       );
 
-      const session = await this.appendSessionMessage(
+      const [latestMessage, session] = await this.appendSessionMessage(
         sessionId,
         messageId,
         retry
       );
-      info.model = session.model;
 
+      info.model = session.model;
       metrics.ai.counter('chat_stream_calls').add(1, { model: session.model });
+
+      if (latestMessage) {
+        params = Object.assign({}, params, latestMessage.params, {
+          content: latestMessage.content,
+          attachments: latestMessage.attachments,
+        });
+      }
+
       this.ongoingStreamCount$.next(this.ongoingStreamCount$.value + 1);
       const finalMessage = session.finish(params);
       info.finalMessage = finalMessage;
@@ -349,10 +369,11 @@ export class CopilotController implements BeforeApplicationShutdown {
     try {
       const { messageId } = this.prepareParams(params);
 
-      const session = await this.appendSessionMessage(sessionId, messageId);
+      const [, session] = await this.appendSessionMessage(sessionId, messageId);
       info.model = session.model;
 
       metrics.ai.counter('workflow_calls').add(1, { model: session.model });
+
       const latestMessage = session.stashMessages.findLast(
         m => m.role === 'user'
       );
@@ -463,12 +484,22 @@ export class CopilotController implements BeforeApplicationShutdown {
         throw new NoCopilotProviderAvailable();
       }
 
-      const session = await this.appendSessionMessage(sessionId, messageId);
+      const [latestMessage, session] = await this.appendSessionMessage(
+        sessionId,
+        messageId
+      );
       info.model = session.model;
-
       metrics.ai
         .counter('images_stream_calls')
         .add(1, { model: session.model });
+
+      if (latestMessage) {
+        params = Object.assign({}, params, latestMessage.params, {
+          content: latestMessage.content,
+          attachments: latestMessage.attachments,
+        });
+      }
+
       const handleRemoteLink = this.storage.handleRemoteLink.bind(
         this.storage,
         user.id,
diff --git a/packages/backend/server/src/plugins/copilot/session.ts b/packages/backend/server/src/plugins/copilot/session.ts
index 502c59ab2f..94ec7bea38 100644
--- a/packages/backend/server/src/plugins/copilot/session.ts
+++ b/packages/backend/server/src/plugins/copilot/session.ts
@@ -63,6 +63,10 @@ export class ChatSession implements AsyncDisposable {
     return this.state.messages.slice(-this.stashMessageCount);
   }
 
+  get latestUserMessage() {
+    return this.state.messages.findLast(m => m.role === 'user');
+  }
+
   push(message: ChatMessage) {
     if (
       this.state.prompt.action &&
@@ -313,6 +317,7 @@ export class ChatSessionService {
               role: true,
               content: true,
               attachments: true,
+              params: true,
               createdAt: true,
             },
             orderBy: { createdAt: 'asc' },