diff --git a/src/main/java/com/deepdirect/deepwebide_be/chat/controller/ChatWebSocketController.java b/src/main/java/com/deepdirect/deepwebide_be/chat/controller/ChatWebSocketController.java
index 652d62d3..b3830d23 100644
--- a/src/main/java/com/deepdirect/deepwebide_be/chat/controller/ChatWebSocketController.java
+++ b/src/main/java/com/deepdirect/deepwebide_be/chat/controller/ChatWebSocketController.java
@@ -30,10 +30,6 @@ public void sendMessage(
         // 1. WebSocket 세션에서 userId 추출
         Long userId = (Long) headerAccessor.getSessionAttributes().get("userId");
 
-        String username = userRepository.findById(userId).get().getUsername();
-        log.info("WebSocket 메시지 전송: userId={}, username={}", userId, username);
-
-        System.out.println(request.getMessage());
         // 2. 메시지 저장 + DTO 응답 변환
         ChatMessageBroadcast broadcast = chatMessageWriteService.saveChatMessage(userId, request);
 
diff --git a/src/main/java/com/deepdirect/deepwebide_be/chat/domain/ChatMessageReference.java b/src/main/java/com/deepdirect/deepwebide_be/chat/domain/ChatMessageReference.java
index a1411737..3cf8eb03 100644
--- a/src/main/java/com/deepdirect/deepwebide_be/chat/domain/ChatMessageReference.java
+++ b/src/main/java/com/deepdirect/deepwebide_be/chat/domain/ChatMessageReference.java
@@ -13,7 +13,8 @@
 @Builder
 public class ChatMessageReference {
 
-    @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
     @OneToOne(fetch = FetchType.LAZY)
diff --git a/src/main/java/com/deepdirect/deepwebide_be/chat/service/ChatMessageWriteService.java b/src/main/java/com/deepdirect/deepwebide_be/chat/service/ChatMessageWriteService.java
index 93c66930..c3bc02d5 100644
--- a/src/main/java/com/deepdirect/deepwebide_be/chat/service/ChatMessageWriteService.java
+++ b/src/main/java/com/deepdirect/deepwebide_be/chat/service/ChatMessageWriteService.java
@@ -63,7 +63,7 @@ public ChatMessageBroadcast saveChatMessage(Long userId, ChatMessageRequest requ
         // 2. 참조 저장 (있으면)
         CodeReferenceRequest refRequest = request.getCodeReference();
         ChatMessageReference reference = null;
-        if (refRequest != null && refRequest.getPath() != null) {
+        if (refRequest != null && refRequest.getPath() != null && !refRequest.getPath().isBlank()) {
             reference = referenceRepository.save(ChatMessageReference.builder()
                     .chatMessage(chatMessage)
                     .path(refRequest.getPath())
diff --git a/src/main/java/com/deepdirect/deepwebide_be/file/service/FileService.java b/src/main/java/com/deepdirect/deepwebide_be/file/service/FileService.java
index 819f9d83..2a678aef 100644
--- a/src/main/java/com/deepdirect/deepwebide_be/file/service/FileService.java
+++ b/src/main/java/com/deepdirect/deepwebide_be/file/service/FileService.java
@@ -66,6 +66,9 @@ public List<FileTreeNodeResponse> getFileTree(Long repositoryId, Long userId) {
                 if (parent != null) parent.getChildren().add(node);
             }
         }
+
+        sortChildrenRecursively(roots);
+
         return roots;
     }
 
@@ -504,4 +507,18 @@ private void validateFolderName(String name) {
             throw new GlobalException(ErrorCode.INVALID_FOLDER_NAME_RESERVED);
     }
 
+    private void sortChildrenRecursively(List<FileTreeNodeResponse> nodes) {
+        if (nodes == null) return;
+        nodes.sort(
+                Comparator
+                        // FOLDER가 먼저 오도록 (폴더면 false, 파일이면 true)
+                        .comparing((FileTreeNodeResponse n) -> !n.getFileType().equalsIgnoreCase("FOLDER"))
+                        // 이름 오름차순(대소문자 무시)
+                        .thenComparing(FileTreeNodeResponse::getFileName, String.CASE_INSENSITIVE_ORDER)
+        );
+        for (FileTreeNodeResponse node : nodes) {
+            sortChildrenRecursively(node.getChildren());
+        }
+    }
+
 }
diff --git a/src/main/java/com/deepdirect/deepwebide_be/global/config/RedisConfig.java b/src/main/java/com/deepdirect/deepwebide_be/global/config/RedisConfig.java
index 8bb047c4..8a7d076b 100644
--- a/src/main/java/com/deepdirect/deepwebide_be/global/config/RedisConfig.java
+++ b/src/main/java/com/deepdirect/deepwebide_be/global/config/RedisConfig.java
@@ -1,14 +1,11 @@
 package com.deepdirect.deepwebide_be.global.config;
 
 import com.deepdirect.deepwebide_be.chat.util.RedisSubscriber;
-import jakarta.annotation.PostConstruct;
 import lombok.RequiredArgsConstructor;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
 import org.springframework.data.redis.core.StringRedisTemplate;
-import org.springframework.data.redis.listener.ChannelTopic;
-import org.springframework.data.redis.listener.PatternTopic;
 import org.springframework.data.redis.listener.RedisMessageListenerContainer;
 
 @Configuration
@@ -25,7 +22,6 @@ public class RedisConfig {
     public RedisMessageListenerContainer redisMessageListenerContainer() {
         RedisMessageListenerContainer container = new RedisMessageListenerContainer();
         container.setConnectionFactory(connectionFactory);
-//        container.addMessageListener(redisSubscriber, new PatternTopic("chat:*"));
         return container;
     }
 
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 3a9438e4..a1bf3410 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -14,8 +14,8 @@ spring.h2.console.path=/h2-console
 # JPA settings (H2)
 spring.jpa.database-platform=org.hibernate.dialect.H2Dialect
 spring.jpa.hibernate.ddl-auto=update
-spring.jpa.show-sql=true
-spring.jpa.properties.hibernate.format_sql=true
+#spring.jpa.show-sql=true
+#spring.jpa.properties.hibernate.format_sql=true
 
 spring.data.redis.host=localhost
 spring.data.redis.port=6379