diff --git a/src/memos/api/handlers/chat_handler.py b/src/memos/api/handlers/chat_handler.py
index 8292e027b..e847a0397 100644
--- a/src/memos/api/handlers/chat_handler.py
+++ b/src/memos/api/handlers/chat_handler.py
@@ -1323,12 +1323,14 @@ def run_async_in_thread():
             )
             # Add exception handling for the background task
             task.add_done_callback(
-                lambda t: self.logger.error(
-                    f"Error in background post-chat processing for user {user_id}: {t.exception()}",
-                    exc_info=True,
+                lambda t: (
+                    self.logger.error(
+                        f"Error in background post-chat processing for user {user_id}: {t.exception()}",
+                        exc_info=True,
+                    )
+                    if t.exception()
+                    else None
                 )
-                if t.exception()
-                else None
             )
         except RuntimeError:
             # No event loop, run in a new thread with context propagation
@@ -1390,12 +1392,14 @@ def run_async_in_thread():
                 )
             )
             task.add_done_callback(
-                lambda t: self.logger.error(
-                    f"Error in background add to memory for user {user_id}: {t.exception()}",
-                    exc_info=True,
+                lambda t: (
+                    self.logger.error(
+                        f"Error in background add to memory for user {user_id}: {t.exception()}",
+                        exc_info=True,
+                    )
+                    if t.exception()
+                    else None
                 )
-                if t.exception()
-                else None
             )
         except RuntimeError:
             thread = ContextThread(
diff --git a/src/memos/api/handlers/search_handler.py b/src/memos/api/handlers/search_handler.py
index 6eda1e2aa..f8ab90470 100644
--- a/src/memos/api/handlers/search_handler.py
+++ b/src/memos/api/handlers/search_handler.py
@@ -11,6 +11,7 @@
 from typing import Any
 
 from memos.api.handlers.base_handler import BaseHandler, HandlerDependencies
+from memos.api.handlers.formatters_handler import rerank_knowledge_mem
 from memos.api.product_models import APISearchRequest, SearchResponse
 from memos.log import get_logger
 from memos.memories.textual.tree_text_memory.retrieve.retrieve_utils import (
@@ -93,6 +94,15 @@ def handle_search_memories(self, search_req: APISearchRequest) -> SearchResponse
             results = self._mmr_dedup_text_memories(results, original_top_k, pref_top_k)
             self._strip_embeddings(results)
 
+        text_mem = results["text_mem"]
+        results["text_mem"] = rerank_knowledge_mem(
+            self.reranker,
+            query=search_req.query,
+            text_mem=text_mem,
+            top_k=original_top_k,
+            file_mem_proportion=0.5,
+        )
+
         self.logger.info(
             f"[SearchHandler] Final search results: count={len(results)} results={results}"
         )
diff --git a/src/memos/mem_os/product.py b/src/memos/mem_os/product.py
index 77a5e70c9..b2c74c384 100644
--- a/src/memos/mem_os/product.py
+++ b/src/memos/mem_os/product.py
@@ -798,12 +798,14 @@ def run_async_in_thread():
             )
             # Add exception handling for the background task
             task.add_done_callback(
-                lambda t: logger.error(
-                    f"Error in background post-chat processing for user {user_id}: {t.exception()}",
-                    exc_info=True,
+                lambda t: (
+                    logger.error(
+                        f"Error in background post-chat processing for user {user_id}: {t.exception()}",
+                        exc_info=True,
+                    )
+                    if t.exception()
+                    else None
                 )
-                if t.exception()
-                else None
             )
         except RuntimeError:
             # No event loop, run in a new thread with context propagation
diff --git a/src/memos/mem_os/product_server.py b/src/memos/mem_os/product_server.py
index 758f2794d..80aefea85 100644
--- a/src/memos/mem_os/product_server.py
+++ b/src/memos/mem_os/product_server.py
@@ -437,12 +437,14 @@ def run_async_in_thread():
             )
             # Add exception handling for the background task
             task.add_done_callback(
-                lambda t: logger.error(
-                    f"Error in background post-chat processing for user {user_id}: {t.exception()}",
-                    exc_info=True,
+                lambda t: (
+                    logger.error(
+                        f"Error in background post-chat processing for user {user_id}: {t.exception()}",
+                        exc_info=True,
+                    )
+                    if t.exception()
+                    else None
                 )
-                if t.exception()
-                else None
             )
         except RuntimeError:
             # No event loop, run in a new thread with context propagation