diff --git a/agent/src/agent.ts b/agent/src/agent.ts
index 1a26d712..e462db48 100644
--- a/agent/src/agent.ts
+++ b/agent/src/agent.ts
@@ -144,9 +144,6 @@ export const createAgent = (
     if (identity.currentPlatform) {
       headers['X-Memoh-Current-Platform'] = identity.currentPlatform
     }
-    if (identity.replyTarget) {
-      headers['X-Memoh-Reply-Target'] = identity.replyTarget
-    }
     const attachments = await Promise.all(
       input.attachments.map(async (attachment) => {
         if (attachment.type !== 'image') {
@@ -286,8 +283,8 @@ export const createAgent = (
     ]
 
     const text = user(input.query, {
-      channelIdentityId: identity.channelIdentityId || identity.contactId || '',
-      displayName: identity.displayName || identity.contactName || 'User',
+      channelIdentityId: identity.channelIdentityId || '',
+      displayName: identity.displayName || 'User',
       channel: currentChannel,
       conversationType: identity.conversationType || 'direct',
       date: new Date(),
diff --git a/agent/src/models.ts b/agent/src/models.ts
index a8c03b5d..a7fa6fcd 100644
--- a/agent/src/models.ts
+++ b/agent/src/models.ts
@@ -28,13 +28,8 @@ export const IdentityContextModel = z.object({
   containerId: z.string().min(1, 'Container ID is required'),
   channelIdentityId: z.string().min(1, 'Channel identity ID is required'),
   displayName: z.string().min(1, 'Display name is required'),
-  contactId: z.string().optional(),
-  contactName: z.string().optional(),
-  contactAlias: z.string().optional(),
-  userId: z.string().optional(),
   currentPlatform: z.string().optional(),
   conversationType: z.string().optional(),
-  replyTarget: z.string().optional(),
   sessionToken: z.string().optional(),
 })
 
diff --git a/agent/src/types/agent.ts b/agent/src/types/agent.ts
index 51174d97..1c5df13f 100644
--- a/agent/src/types/agent.ts
+++ b/agent/src/types/agent.ts
@@ -6,18 +6,10 @@ import { MCPConnection } from './mcp'
 export interface IdentityContext {
   botId: string
   containerId: string
-
   channelIdentityId: string
   displayName: string
-
-  contactId?: string
-  contactName?: string
-  contactAlias?: string
-  userId?: string
-
   currentPlatform?: string
   conversationType?: string
-  replyTarget?: string
   sessionToken?: string
 }
 
diff --git a/agent/src/utils/headers.ts b/agent/src/utils/headers.ts
index 3ce71437..ea1c6ae4 100644
--- a/agent/src/utils/headers.ts
+++ b/agent/src/utils/headers.ts
@@ -13,8 +13,5 @@ export const buildIdentityHeaders = (identity: IdentityContext, auth: AgentAuthC
   if (identity.currentPlatform) {
     headers['X-Memoh-Current-Platform'] = identity.currentPlatform
   }
-  if (identity.replyTarget) {
-    headers['X-Memoh-Reply-Target'] = identity.replyTarget
-  }
   return headers
 }
\ No newline at end of file