diff --git a/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_actions/provider_request_builders.rs b/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_actions/provider_request_builders.rs
index 58363e5ed..c1d521d5e 100644
--- a/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_actions/provider_request_builders.rs
+++ b/apps/ai-game-creator-shell/src-tauri/src/agent/runtime_actions/provider_request_builders.rs
@@ -345,10 +345,12 @@ pub(in crate::agent) fn build_game_creator_background_agent_context(
     )?;
     let repository_context = build_repository_startup_context_at(root)?;
     let repository_prompt = render_repository_startup_context_for_prompt(&repository_context);
-    let identity_instruction = if matches!(mode, AgentBackgroundContextMode::FinalReply) {
-        ""
-    } else if template_agent_id == GAME_CREATOR_PROJECT_SUPERVISOR_AGENT_ID {
-        game_creator_project_supervisor_identity_contract_prompt()
+    let identity_instruction = if template_agent_id == GAME_CREATOR_PROJECT_SUPERVISOR_AGENT_ID {
+        if matches!(mode, AgentBackgroundContextMode::FinalReply) {
+            ""
+        } else {
+            game_creator_project_supervisor_identity_contract_prompt()
+        }
     } else {
         "请只以这个专业 Agent 的身份行动。"
     };
@@ -731,6 +733,7 @@ mod tests {
         let ordinary_prompt = &ordinary_request.messages[1].content;
         assert!(!ordinary_prompt.contains(supervisor_identity_contract));
         assert!(ordinary_prompt.contains(ORDINARY_NOTICE));
+        assert!(ordinary_prompt.contains("请只以这个专业 Agent 的身份行动"));
         assert!(!ordinary_prompt.contains(SUPERVISOR_NOTICE));
         assert!(!ordinary_prompt.contains(MEMORY_MARKER));
 
@@ -778,6 +781,21 @@ mod tests {
         );
         assert!(!final_user_prompt.contains(supervisor_identity_contract));
         assert!(!final_user_prompt.contains("你拥有最终回复权"));
+
+        let (_, _, ordinary_final_request) =
+            build_game_creator_agent_background_final_reply_request(
+                &root,
+                "code-prototype",
+                &ordinary_state.session_id,
+                &ordinary_state.run_id,
+                &ordinary_state.current_task,
+                &plan,
+                &[],
+            )
+            .expect("build ordinary final reply request");
+        assert!(ordinary_final_request.messages[1]
+            .content
+            .contains("请只以这个专业 Agent 的身份行动"));
     }
 
     #[test]