feat: 멀티플레이어 네트워크 동기화 구현

- 로비 씬 추가 및 LobbyManager/LobbyUI/LobbySceneBuilder 구현 - NetworkPrefabsList로 플레이어 프리팹 등록 (PlayerPrefab 자동스폰 비활성화) - PlayerMovement 서버 권한 이동 아키텍처로 전환 - NetworkVariable<Vector2>로 클라이언트 입력 → 서버 전달 - 점프 JumpRequestRpc로 서버 검증 후 실행 - 보스 프리팹에 NetworkTransform/NetworkAnimator 추가 (서버 권한) - SkillController를 NetworkBehaviour로 전환 - PlaySkillClipClientRpc로 클립 override + 재생 원자적 동기화 - OnEffect/OnSkillEnd 클라이언트 실행 차단 - WeaponEquipment 클라이언트 무기 시각화 동기화 수정 - registeredWeapons 인덱스 기반 NetworkVariable 동기화 - SpawnWeaponVisualsLocal로 클라이언트 무기 생성 - 중복 Instantiate 버그 수정 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-17 20:46:45 +09:00
parent b470aa4f8a
commit e5ef94da85
24 changed files with 5150 additions and 116 deletions
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+  m_Sprite: {fileID: 0}
+  m_Type: 0
+  m_PreserveAspect: 0
+  m_FillCenter: 1
+  m_FillMethod: 4
+  m_FillAmount: 1
+  m_FillClockwise: 1
+  m_FillOrigin: 0
+  m_UseSpriteMesh: 0
+  m_PixelsPerUnitMultiplier: 1
--- a/Assets/_Game/Prefabs/UI/UI_PlayerSlot.prefab.meta
+++ b/Assets/_Game/Prefabs/UI/UI_PlayerSlot.prefab.meta
@@ -0,0 +1,7 @@
+fileFormatVersion: 2
+guid: b4e86ed3d040269429d9ace4454313f1
+PrefabImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
--- a/Assets/_Game/Scripts/Core/GameManager.cs
+++ b/Assets/_Game/Scripts/Core/GameManager.cs
@@ -27,6 +27,10 @@ namespace Colosseum
    /// </summary>
    public class GameManager : NetworkBehaviour
    {
+        [Header("Player")]
+        [Tooltip("플레이어 프리팹 (NetworkObject 포함)")]
+        [SerializeField] private GameObject playerPrefab;
+
        [Header("UI Prefabs")]
        [Tooltip("게임 오버 UI 프리팹")]
        [SerializeField] private GameObject gameOverUIPrefab;
@@ -107,33 +111,62 @@ namespace Colosseum
            if (loadSceneMode == LoadSceneMode.Single)
            {
                if (debugMode)
-                {
                    Debug.Log($"[GameManager] Scene loaded: {sceneName}");
-                }

-                // 씬 로드 완료 시 플레이어 리스폰
                if (IsServer)
+                    StartCoroutine(SpawnPlayersAndRespawn(clientsCompleted));
+            }
+        }
+
+        private IEnumerator SpawnPlayersAndRespawn(List<ulong> clientsCompleted)
+        {
+            if (playerPrefab == null)
+            {
+                Debug.LogWarning("[GameManager] playerPrefab이 설정되지 않았습니다. 인스펙터에서 할당하세요.");
+                RespawnAllPlayersClientRpc();
+                yield break;
+            }
+
+            Debug.Log($"[GameManager] SpawnPlayersAndRespawn: clientsCompleted=[{string.Join(",", clientsCompleted)}]");
+
+            // 씬 로드를 완료한 클라이언트마다 플레이어 스폰
+            foreach (ulong clientId in clientsCompleted)
+            {
+                var go = Instantiate(playerPrefab);
+                var no = go.GetComponent<NetworkObject>();
+                if (no != null)
                {
-                    RespawnAllPlayersClientRpc();
+                    no.SpawnAsPlayerObject(clientId, true);
+                    Debug.Log($"[GameManager] Spawned player for clientId={clientId}");
+                }
+                else
+                {
+                    Debug.LogError($"[GameManager] playerPrefab에 NetworkObject가 없습니다!");
+                    Destroy(go);
                }
            }
+
+            // 클라이언트가 스폰된 오브젝트를 받을 시간 여유
+            yield return new WaitForSeconds(0.5f);
+            RespawnAllPlayersClientRpc();
        }

        [Rpc(SendTo.ClientsAndHost)]
        private void RespawnAllPlayersClientRpc()
        {
-            // 모든 플레이어 리스폰
+            // 서버: 모든 플레이어 체력/상태 리셋
            var players = FindObjectsByType<PlayerNetworkController>(FindObjectsSortMode.None);
            foreach (var player in players)
            {
                player.Respawn();
            }

-            // 카메라 재설정
-            var playerMovement = FindObjectsByType<PlayerMovement>(FindObjectsSortMode.None);
-            foreach (var movement in playerMovement)
+            // 카메라 재설정 — 자신이 소유한 플레이어만
+            var playerMovements = FindObjectsByType<PlayerMovement>(FindObjectsSortMode.None);
+            foreach (var movement in playerMovements)
            {
-                movement.RefreshCamera();
+                if (movement.IsOwner)
+                    movement.RefreshCamera();
            }
        }

--- a/Assets/_Game/Scripts/Editor/LobbySceneBuilder.cs
+++ b/Assets/_Game/Scripts/Editor/LobbySceneBuilder.cs
@@ -0,0 +1,415 @@
+using UnityEditor;
+using UnityEditor.SceneManagement;
+using UnityEngine;
+using UnityEngine.UI;
+using TMPro;
+using Unity.Netcode;
+using Unity.Netcode.Transports.UTP;
+
+namespace Colosseum.Editor
+{
+    public static class LobbySceneBuilder
+    {
+        [MenuItem("Colosseum/Build Lobby Scene")]
+        public static void Build()
+        {
+            // ── 씬 생성 ──────────────────────────────────────────
+            var scene = EditorSceneManager.NewScene(NewSceneSetup.EmptyScene, NewSceneMode.Single);
+
+            // ── NetworkManager ───────────────────────────────────
+            var nmGO = new GameObject("NetworkManager");
+            var nm = nmGO.AddComponent<NetworkManager>();
+            var transport = nmGO.AddComponent<UnityTransport>();
+            nm.NetworkConfig = new NetworkConfig
+            {
+                NetworkTransport = transport
+            };
+
+            // ── Network Prefabs 등록 ──────────────────────────────
+            var playerPrefabAsset = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/_Game/Prefabs/Player/Prefab_Player_Default.prefab");
+            if (playerPrefabAsset != null)
+                AddNetworkPrefab(nm, playerPrefabAsset);
+            else
+                Debug.LogWarning("[LobbySceneBuilder] Player prefab not found at expected path.");
+
+            // ── LobbyManager ─────────────────────────────────────
+            var lmGO = new GameObject("LobbyManager");
+            lmGO.AddComponent<Unity.Netcode.NetworkObject>();
+            lmGO.AddComponent<Colosseum.Network.LobbyManager>();
+
+            // ── Canvas ───────────────────────────────────────────
+            var canvasGO = new GameObject("Canvas");
+            var canvas = canvasGO.AddComponent<Canvas>();
+            canvas.renderMode = RenderMode.ScreenSpaceOverlay;
+            canvasGO.AddComponent<CanvasScaler>().uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
+            canvasGO.AddComponent<GraphicRaycaster>();
+
+            // EventSystem — New Input System 사용 중이므로 InputSystemUIInputModule 사용
+            var esGO = new GameObject("EventSystem");
+            esGO.AddComponent<UnityEngine.EventSystems.EventSystem>();
+            esGO.AddComponent<UnityEngine.InputSystem.UI.InputSystemUIInputModule>();
+
+            // ── ConnectPanel ──────────────────────────────────────
+            var connectPanel = CreatePanel(canvasGO.transform, "ConnectPanel");
+            var connectRect = connectPanel.GetComponent<RectTransform>();
+            connectRect.anchorMin = Vector2.zero;
+            connectRect.anchorMax = Vector2.one;
+            connectRect.offsetMin = Vector2.zero;
+            connectRect.offsetMax = Vector2.zero;
+
+            var vLayout = connectPanel.AddComponent<VerticalLayoutGroup>();
+            vLayout.childAlignment = TextAnchor.MiddleCenter;
+            vLayout.spacing = 12;
+            vLayout.childForceExpandWidth = false;
+            vLayout.childForceExpandHeight = false;
+            connectPanel.AddComponent<ContentSizeFitter>();
+
+            CreateLabel(connectPanel.transform, "TitleLabel", "Colosseum Lobby", 36);
+            var ipInput    = CreateInputField(connectPanel.transform, "IpInput", "Host IP (127.0.0.1)", 300, 50);
+            var portInput  = CreateInputField(connectPanel.transform, "PortInput", "Port (7777)", 300, 50);
+            var hostBtn    = CreateButton(connectPanel.transform, "HostButton", "Host", 200, 50);
+            var joinBtn    = CreateButton(connectPanel.transform, "JoinButton", "Join", 200, 50);
+            var statusText = CreateLabel(connectPanel.transform, "StatusText", "", 18);
+            statusText.color = Color.yellow;
+
+            // ── LobbyPanel ────────────────────────────────────────
+            var lobbyPanel = CreatePanel(canvasGO.transform, "LobbyPanel");
+            var lobbyRect = lobbyPanel.GetComponent<RectTransform>();
+            lobbyRect.anchorMin = Vector2.zero;
+            lobbyRect.anchorMax = Vector2.one;
+            lobbyRect.offsetMin = Vector2.zero;
+            lobbyRect.offsetMax = Vector2.zero;
+            lobbyPanel.SetActive(false);
+
+            var vLayout2 = lobbyPanel.AddComponent<VerticalLayoutGroup>();
+            vLayout2.childAlignment = TextAnchor.MiddleCenter;
+            vLayout2.spacing = 12;
+            vLayout2.childForceExpandWidth = false;
+            vLayout2.childForceExpandHeight = false;
+
+            CreateLabel(lobbyPanel.transform, "LobbyTitle", "Waiting Room", 32);
+
+            // PlayerList: ScrollView 역할을 하는 VerticalLayout 컨테이너
+            var playerListGO = new GameObject("PlayerList");
+            playerListGO.transform.SetParent(lobbyPanel.transform, false);
+            var plRect = playerListGO.AddComponent<RectTransform>();
+            plRect.sizeDelta = new Vector2(400, 200);
+            var plLayout = playerListGO.AddComponent<VerticalLayoutGroup>();
+            plLayout.childAlignment = TextAnchor.UpperCenter;
+            plLayout.spacing = 8;
+            plLayout.childForceExpandWidth = true;
+            plLayout.childForceExpandHeight = false;
+            playerListGO.AddComponent<ContentSizeFitter>().verticalFit = ContentSizeFitter.FitMode.PreferredSize;
+
+            var readyBtn  = CreateButton(lobbyPanel.transform, "ReadyButton", "준비", 200, 50);
+            var startBtn  = CreateButton(lobbyPanel.transform, "StartButton", "게임 시작", 200, 50);
+            var discBtn   = CreateButton(lobbyPanel.transform, "DisconnectButton", "나가기", 200, 50);
+
+            // ── PlayerSlot 프리팹 ─────────────────────────────────
+            var slotGO = new GameObject("PlayerSlot");
+            var slotRect = slotGO.AddComponent<RectTransform>();
+            slotRect.sizeDelta = new Vector2(380, 40);
+            var bg = slotGO.AddComponent<Image>();
+            bg.color = new Color(0.2f, 0.2f, 0.2f, 0.8f);
+
+            var slotLabel = new GameObject("Label");
+            slotLabel.transform.SetParent(slotGO.transform, false);
+            var slotLabelRect = slotLabel.AddComponent<RectTransform>();
+            slotLabelRect.anchorMin = Vector2.zero;
+            slotLabelRect.anchorMax = Vector2.one;
+            slotLabelRect.offsetMin = new Vector2(8, 0);
+            slotLabelRect.offsetMax = new Vector2(-8, 0);
+            var slotTmp = slotLabel.AddComponent<TextMeshProUGUI>();
+            slotTmp.text = "Player";
+            slotTmp.fontSize = 20;
+            slotTmp.alignment = TextAlignmentOptions.MidlineLeft;
+
+            System.IO.Directory.CreateDirectory(Application.dataPath + "/_Game/Prefabs/UI");
+            var slotPrefab = PrefabUtility.SaveAsPrefabAsset(slotGO, "Assets/_Game/Prefabs/UI/PlayerSlot.prefab");
+            Object.DestroyImmediate(slotGO);
+
+            // ── LobbyUI 연결 ──────────────────────────────────────
+            var uiGO = new GameObject("UIController");
+            var lobbyUI = uiGO.AddComponent<Colosseum.UI.LobbyUI>();
+
+            SetPrivateField(lobbyUI, "connectPanel", connectPanel);
+            SetPrivateField(lobbyUI, "ipInput", ipInput.GetComponent<TMP_InputField>());
+            SetPrivateField(lobbyUI, "portInput", portInput.GetComponent<TMP_InputField>());
+            SetPrivateField(lobbyUI, "hostButton", hostBtn.GetComponent<Button>());
+            SetPrivateField(lobbyUI, "joinButton", joinBtn.GetComponent<Button>());
+            SetPrivateField(lobbyUI, "connectStatusText", statusText);
+            SetPrivateField(lobbyUI, "lobbyPanel", lobbyPanel);
+            SetPrivateField(lobbyUI, "playerListParent", playerListGO.transform);
+            SetPrivateField(lobbyUI, "playerSlotPrefab", slotPrefab);
+            SetPrivateField(lobbyUI, "readyButton", readyBtn.GetComponent<Button>());
+            SetPrivateField(lobbyUI, "startButton", startBtn.GetComponent<Button>());
+            SetPrivateField(lobbyUI, "disconnectButton", discBtn.GetComponent<Button>());
+
+            // ── 씬 저장 ───────────────────────────────────────────
+            EditorSceneManager.SaveScene(scene, "Assets/Scenes/Lobby.unity");
+
+            // ── Build Settings 등록 ───────────────────────────────
+            AddSceneToBuildSettings("Assets/Scenes/Lobby.unity", 0);
+            AddSceneToBuildSettings("Assets/Scenes/Test.unity", 1);
+
+            Debug.Log("[LobbySceneBuilder] Lobby scene built successfully.");
+        }
+
+        [MenuItem("Colosseum/Register Network Prefabs")]
+        public static void RegisterNetworkPrefabs()
+        {
+            var nm = Object.FindFirstObjectByType<NetworkManager>();
+            if (nm == null)
+            {
+                Debug.LogError("[LobbySceneBuilder] NetworkManager not found in current scene.");
+                return;
+            }
+
+            var playerPrefabAsset = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/_Game/Prefabs/Player/Prefab_Player_Default.prefab");
+            if (playerPrefabAsset == null)
+            {
+                Debug.LogError("[LobbySceneBuilder] Player prefab not found.");
+                return;
+            }
+
+            // NetworkPrefabsList ScriptableObject 생성 또는 로드
+            const string listPath = "Assets/_Game/NetworkPrefabsList.asset";
+            var prefabList = AssetDatabase.LoadAssetAtPath<NetworkPrefabsList>(listPath);
+            if (prefabList == null)
+            {
+                prefabList = ScriptableObject.CreateInstance<NetworkPrefabsList>();
+                AssetDatabase.CreateAsset(prefabList, listPath);
+                AssetDatabase.SaveAssets();
+                AssetDatabase.Refresh();
+                Debug.Log("[LobbySceneBuilder] Created NetworkPrefabsList asset.");
+            }
+
+            // 플레이어 프리팹을 리스트에 추가 (내부 필드명은 "List")
+            if (!prefabList.Contains(playerPrefabAsset))
+            {
+                prefabList.Add(new NetworkPrefab { Prefab = playerPrefabAsset });
+                EditorUtility.SetDirty(prefabList);
+                AssetDatabase.SaveAssets();
+                Debug.Log("[LobbySceneBuilder] Added player prefab to NetworkPrefabsList.");
+            }
+
+            // NetworkManager에 리스트 등록 & PlayerPrefab은 null로 (자동 스폰 방지)
+            var so = new SerializedObject(nm);
+            so.Update();
+
+            var playerPrefabProp = so.FindProperty("NetworkConfig.PlayerPrefab");
+            if (playerPrefabProp != null)
+                playerPrefabProp.objectReferenceValue = null;
+
+            var nmListsProp = so.FindProperty("NetworkConfig.Prefabs.NetworkPrefabsLists");
+            if (nmListsProp != null)
+            {
+                bool alreadyAdded = false;
+                for (int i = 0; i < nmListsProp.arraySize; i++)
+                {
+                    if (nmListsProp.GetArrayElementAtIndex(i).objectReferenceValue == prefabList)
+                    { alreadyAdded = true; break; }
+                }
+                if (!alreadyAdded)
+                {
+                    // null 항목 제거 후 추가
+                    for (int i = nmListsProp.arraySize - 1; i >= 0; i--)
+                        if (nmListsProp.GetArrayElementAtIndex(i).objectReferenceValue == null)
+                            nmListsProp.DeleteArrayElementAtIndex(i);
+
+                    int idx = nmListsProp.arraySize;
+                    nmListsProp.InsertArrayElementAtIndex(idx);
+                    nmListsProp.GetArrayElementAtIndex(idx).objectReferenceValue = prefabList;
+                }
+            }
+            else
+            {
+                Debug.LogError("[LobbySceneBuilder] Could not find NetworkConfig.Prefabs.NetworkPrefabsLists property.");
+            }
+
+            so.ApplyModifiedProperties();
+            EditorSceneManager.MarkSceneDirty(nm.gameObject.scene);
+            EditorSceneManager.SaveScene(nm.gameObject.scene);
+            Debug.Log("[LobbySceneBuilder] NetworkPrefabsList registered. PlayerPrefab cleared. Scene saved.");
+        }
+
+        [MenuItem("Colosseum/Open Lobby Scene")]
+        public static void OpenLobbyScene()
+        {
+            if (EditorApplication.isPlaying)
+                EditorApplication.isPlaying = false;
+            EditorSceneManager.OpenScene("Assets/Scenes/Lobby.unity");
+        }
+
+        [MenuItem("Colosseum/Play Lobby Scene")]
+        public static void PlayLobbyScene()
+        {
+            if (!EditorApplication.isPlaying)
+            {
+                EditorSceneManager.OpenScene("Assets/Scenes/Lobby.unity");
+                EditorApplication.isPlaying = true;
+            }
+        }
+
+        [MenuItem("Colosseum/Stop Play")]
+        public static void StopPlay()
+        {
+            EditorApplication.isPlaying = false;
+        }
+
+        // ── 헬퍼 메서드 ──────────────────────────────────────────
+
+        private static GameObject CreatePanel(Transform parent, string name)
+        {
+            var go = new GameObject(name);
+            go.transform.SetParent(parent, false);
+            go.AddComponent<RectTransform>();
+            var img = go.AddComponent<Image>();
+            img.color = new Color(0, 0, 0, 0.6f);
+            return go;
+        }
+
+        private static GameObject CreateInputField(Transform parent, string name, string placeholder, float w, float h)
+        {
+            var go = new GameObject(name);
+            go.transform.SetParent(parent, false);
+            var rect = go.AddComponent<RectTransform>();
+            rect.sizeDelta = new Vector2(w, h);
+            go.AddComponent<Image>().color = new Color(0.15f, 0.15f, 0.15f, 1f);
+            var input = go.AddComponent<TMP_InputField>();
+
+            var textArea = new GameObject("Text Area");
+            textArea.transform.SetParent(go.transform, false);
+            var taRect = textArea.AddComponent<RectTransform>();
+            taRect.anchorMin = Vector2.zero;
+            taRect.anchorMax = Vector2.one;
+            taRect.offsetMin = new Vector2(8, 2);
+            taRect.offsetMax = new Vector2(-8, -2);
+            textArea.AddComponent<RectMask2D>();
+
+            var phGO = new GameObject("Placeholder");
+            phGO.transform.SetParent(textArea.transform, false);
+            var phRect = phGO.AddComponent<RectTransform>();
+            phRect.anchorMin = Vector2.zero;
+            phRect.anchorMax = Vector2.one;
+            phRect.offsetMin = phRect.offsetMax = Vector2.zero;
+            var phTmp = phGO.AddComponent<TextMeshProUGUI>();
+            phTmp.text = placeholder;
+            phTmp.fontSize = 18;
+            phTmp.color = new Color(0.5f, 0.5f, 0.5f);
+
+            var txtGO = new GameObject("Text");
+            txtGO.transform.SetParent(textArea.transform, false);
+            var txtRect = txtGO.AddComponent<RectTransform>();
+            txtRect.anchorMin = Vector2.zero;
+            txtRect.anchorMax = Vector2.one;
+            txtRect.offsetMin = txtRect.offsetMax = Vector2.zero;
+            var txt = txtGO.AddComponent<TextMeshProUGUI>();
+            txt.fontSize = 18;
+            txt.color = Color.white;
+
+            input.textViewport = taRect;
+            input.placeholder = phTmp;
+            input.textComponent = txt;
+
+            return go;
+        }
+
+        private static GameObject CreateButton(Transform parent, string name, string label, float w, float h)
+        {
+            var go = new GameObject(name);
+            go.transform.SetParent(parent, false);
+            var rect = go.AddComponent<RectTransform>();
+            rect.sizeDelta = new Vector2(w, h);
+            go.AddComponent<Image>().color = new Color(0.2f, 0.5f, 0.8f, 1f);
+            go.AddComponent<Button>();
+
+            var txtGO = new GameObject("Text");
+            txtGO.transform.SetParent(go.transform, false);
+            var txtRect = txtGO.AddComponent<RectTransform>();
+            txtRect.anchorMin = Vector2.zero;
+            txtRect.anchorMax = Vector2.one;
+            txtRect.offsetMin = txtRect.offsetMax = Vector2.zero;
+            var tmp = txtGO.AddComponent<TextMeshProUGUI>();
+            tmp.text = label;
+            tmp.fontSize = 20;
+            tmp.alignment = TextAlignmentOptions.Center;
+            tmp.color = Color.white;
+
+            return go;
+        }
+
+        private static TextMeshProUGUI CreateLabel(Transform parent, string name, string text, int size)
+        {
+            var go = new GameObject(name);
+            go.transform.SetParent(parent, false);
+            var rect = go.AddComponent<RectTransform>();
+            rect.sizeDelta = new Vector2(400, size * 1.6f);
+            var tmp = go.AddComponent<TextMeshProUGUI>();
+            tmp.text = text;
+            tmp.fontSize = size;
+            tmp.alignment = TextAlignmentOptions.Center;
+            tmp.color = Color.white;
+            return tmp;
+        }
+
+        private static void SetPrivateField(object obj, string fieldName, object value)
+        {
+            var field = obj.GetType().GetField(fieldName,
+                System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
+            if (field != null)
+                field.SetValue(obj, value);
+            else
+                Debug.LogWarning($"[LobbySceneBuilder] Field not found: {fieldName}");
+        }
+
+        /// <summary>
+        /// NetworkPrefabHandler의 내부 List<NetworkPrefab>에 리플렉션으로 프리팹을 추가합니다.
+        /// (Prefabs 프로퍼티가 IReadOnlyList이므로 직접 Add 불가)
+        /// </summary>
+        private static void AddNetworkPrefab(NetworkManager nm, GameObject prefab)
+        {
+            var handler = nm.NetworkConfig.Prefabs;
+            var bindingFlags = System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance;
+
+            // 타입으로 직접 탐색 (필드명은 NGO 버전마다 다를 수 있음)
+            System.Collections.Generic.List<NetworkPrefab> list = null;
+            foreach (var field in handler.GetType().GetFields(bindingFlags))
+            {
+                if (field.FieldType == typeof(System.Collections.Generic.List<NetworkPrefab>))
+                {
+                    list = field.GetValue(handler) as System.Collections.Generic.List<NetworkPrefab>;
+                    if (list != null) break;
+                }
+            }
+
+            if (list == null)
+            {
+                Debug.LogError("[LobbySceneBuilder] Could not find List<NetworkPrefab> on NetworkPrefabHandler via reflection.");
+                return;
+            }
+
+            list.Add(new NetworkPrefab { Prefab = prefab });
+            EditorUtility.SetDirty(nm);
+        }
+
+        private static void AddSceneToBuildSettings(string scenePath, int index)
+        {
+            var scenes = EditorBuildSettings.scenes;
+            foreach (var s in scenes)
+                if (s.path == scenePath) return;   // 이미 등록됨
+
+            var newScenes = new EditorBuildSettingsScene[scenes.Length + 1];
+
+            // index 위치에 삽입
+            int insertAt = Mathf.Clamp(index, 0, scenes.Length);
+            for (int i = 0; i < insertAt; i++)
+                newScenes[i] = scenes[i];
+            newScenes[insertAt] = new EditorBuildSettingsScene(scenePath, true);
+            for (int i = insertAt; i < scenes.Length; i++)
+                newScenes[i + 1] = scenes[i];
+
+            EditorBuildSettings.scenes = newScenes;
+        }
+    }
+}
--- a/Assets/_Game/Scripts/Editor/LobbySceneBuilder.cs.meta
+++ b/Assets/_Game/Scripts/Editor/LobbySceneBuilder.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 84992c83a100d324c900f515f2f89734
--- a/Assets/_Game/Scripts/Network/LobbyManager.cs
+++ b/Assets/_Game/Scripts/Network/LobbyManager.cs
@@ -0,0 +1,147 @@
+using System;
+using Unity.Collections;
+using Unity.Netcode;
+using Unity.Netcode.Transports.UTP;
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Colosseum.Network
+{
+    /// <summary>
+    /// 로비 상태 관리. NetworkBehaviour로 플레이어 목록을 모든 클라이언트에 동기화.
+    /// NetworkManager가 있는 오브젝트와 별개로 배치하거나 NetworkObject 컴포넌트 필요.
+    /// </summary>
+    public class LobbyManager : NetworkBehaviour
+    {
+        public static LobbyManager Instance { get; private set; }
+
+        [Header("Game Scene")]
+        [SerializeField] private string gameSceneName = "Test";
+
+        // 모든 클라이언트에 동기화되는 플레이어 목록
+        private NetworkList<LobbyPlayerData> _players;
+
+        public event Action OnPlayersChanged;
+
+        // ─── 초기화 ───────────────────────────────────────────────
+        private void Awake()
+        {
+            if (Instance != null && Instance != this)
+            {
+                Destroy(gameObject);
+                return;
+            }
+            Instance = this;
+
+            _players = new NetworkList<LobbyPlayerData>();
+        }
+
+        public override void OnNetworkSpawn()
+        {
+            _players.OnListChanged += _ => OnPlayersChanged?.Invoke();
+
+            if (IsServer)
+            {
+                NetworkManager.Singleton.OnClientConnectedCallback += OnClientConnected;
+                NetworkManager.Singleton.OnClientDisconnectCallback += OnClientDisconnected;
+
+                // 호스트 자신 추가
+                AddPlayer(NetworkManager.Singleton.LocalClientId);
+            }
+        }
+
+        public override void OnNetworkDespawn()
+        {
+            if (IsServer)
+            {
+                NetworkManager.Singleton.OnClientConnectedCallback -= OnClientConnected;
+                NetworkManager.Singleton.OnClientDisconnectCallback -= OnClientDisconnected;
+            }
+        }
+
+        // ─── 연결 제어 (클라이언트에서 호출) ─────────────────────
+        /// <summary>호스트 시작</summary>
+        public void StartHost(string ip, ushort port)
+        {
+            SetTransport(ip, port);
+            NetworkManager.Singleton.StartHost();
+        }
+
+        /// <summary>클라이언트로 접속</summary>
+        public void StartClient(string ip, ushort port)
+        {
+            SetTransport(ip, port);
+            NetworkManager.Singleton.StartClient();
+        }
+
+        public void Disconnect()
+        {
+            NetworkManager.Singleton?.Shutdown();
+        }
+
+        // ─── 플레이어 목록 ────────────────────────────────────────
+        public int PlayerCount => _players.Count;
+
+        public LobbyPlayerData GetPlayer(int index) => _players[index];
+
+        private void OnClientConnected(ulong clientId)
+        {
+            AddPlayer(clientId);
+        }
+
+        private void OnClientDisconnected(ulong clientId)
+        {
+            for (int i = 0; i < _players.Count; i++)
+            {
+                if (_players[i].ClientId == clientId)
+                {
+                    _players.RemoveAt(i);
+                    return;
+                }
+            }
+        }
+
+        private void AddPlayer(ulong clientId)
+        {
+            _players.Add(new LobbyPlayerData
+            {
+                ClientId = clientId,
+                PlayerName = new FixedString32Bytes($"Player {clientId}"),
+                IsReady = false
+            });
+        }
+
+        // ─── 준비 상태 ────────────────────────────────────────────
+        [Rpc(SendTo.Server)]
+        public void SetReadyRpc(bool isReady, RpcParams rpcParams = default)
+        {
+            ulong clientId = rpcParams.Receive.SenderClientId;
+            for (int i = 0; i < _players.Count; i++)
+            {
+                if (_players[i].ClientId == clientId)
+                {
+                    var data = _players[i];
+                    data.IsReady = isReady;
+                    _players[i] = data;
+                    return;
+                }
+            }
+        }
+
+        // ─── 게임 시작 ────────────────────────────────────────────
+        /// <summary>호스트만 호출 가능. 모든 플레이어가 준비되어야 활성화 권장.</summary>
+        public void StartGame()
+        {
+            if (!IsHost) return;
+            NetworkManager.Singleton.SceneManager.LoadScene(gameSceneName, LoadSceneMode.Single);
+        }
+
+        // ─── 유틸 ─────────────────────────────────────────────────
+        private void SetTransport(string ip, ushort port)
+        {
+            var transport = NetworkManager.Singleton?.GetComponent<UnityTransport>();
+            if (transport != null)
+                transport.SetConnectionData(ip, port);
+        }
+    }
+}
--- a/Assets/_Game/Scripts/Network/LobbyManager.cs.meta
+++ b/Assets/_Game/Scripts/Network/LobbyManager.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 8db7d99e81050fd4d8768e2fa31483a0
--- a/Assets/_Game/Scripts/Network/LobbyPlayerData.cs
+++ b/Assets/_Game/Scripts/Network/LobbyPlayerData.cs
@@ -0,0 +1,24 @@
+using Unity.Collections;
+using Unity.Netcode;
+
+namespace Colosseum.Network
+{
+    public struct LobbyPlayerData : INetworkSerializable, System.IEquatable<LobbyPlayerData>
+    {
+        public ulong ClientId;
+        public FixedString32Bytes PlayerName;
+        public bool IsReady;
+
+        public void NetworkSerialize<T>(BufferSerializer<T> serializer) where T : IReaderWriter
+        {
+            serializer.SerializeValue(ref ClientId);
+            serializer.SerializeValue(ref PlayerName);
+            serializer.SerializeValue(ref IsReady);
+        }
+
+        public bool Equals(LobbyPlayerData other) =>
+            ClientId == other.ClientId &&
+            PlayerName == other.PlayerName &&
+            IsReady == other.IsReady;
+    }
+}
--- a/Assets/_Game/Scripts/Network/LobbyPlayerData.cs.meta
+++ b/Assets/_Game/Scripts/Network/LobbyPlayerData.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: b07f5fad09b348b4387a5824c72f802f
--- a/Assets/_Game/Scripts/Player/PlayerCamera.cs
+++ b/Assets/_Game/Scripts/Player/PlayerCamera.cs
@@ -53,6 +53,7 @@ namespace Colosseum.Player

            // 기존 메인 카메라 사용 또는 새로 생성
            cameraInstance = Camera.main;
+            Debug.Log($"[PlayerCamera] Initialize: target={playerTransform?.name}, Camera.main={cameraInstance?.name ?? "NULL"}");
            if (cameraInstance == null)
            {
                var cameraObject = new GameObject("PlayerCamera");
--- a/Assets/_Game/Scripts/Player/PlayerMovement.cs
+++ b/Assets/_Game/Scripts/Player/PlayerMovement.cs
@@ -7,7 +7,9 @@ using Colosseum.Skills;
 namespace Colosseum.Player
 {
    /// <summary>
-    /// 3인칭 플레이어 이동 (네트워크 동기화)
+    /// 서버 권한 이동.
+    /// - 오너(클라이언트/호스트): 입력 수집 → NetworkVariable에 월드 방향 기록
+    /// - 서버: NetworkVariable을 읽어 CharacterController 구동 → NetworkTransform으로 동기화
    /// </summary>
    [RequireComponent(typeof(CharacterController))]
    public class PlayerMovement : NetworkBehaviour
@@ -26,52 +28,68 @@ namespace Colosseum.Player

        private CharacterController characterController;
        private Vector3 velocity;
-        private Vector2 moveInput;
+        private Vector2 moveInput;             // 로컬 원시 입력 (IsOwner 전용)
        private InputSystem_Actions inputActions;
        private bool isJumping;
        private bool wasGrounded;

+        // 클라이언트가 기록, 서버가 소비하는 월드 스페이스 이동 방향
+        private NetworkVariable<Vector2> netMoveInput = new NetworkVariable<Vector2>(
+            Vector2.zero,
+            NetworkVariableReadPermission.Everyone,
+            NetworkVariableWritePermission.Owner);
+
        // 적 충돌 차단용
        private Vector3 blockedDirection;
        private readonly Collider[] overlapBuffer = new Collider[8];

-        public float CurrentMoveSpeed => moveInput.magnitude * moveSpeed;
+        public float CurrentMoveSpeed => netMoveInput.Value.magnitude * moveSpeed;
        public bool IsGrounded => characterController != null ? characterController.isGrounded : false;
        public bool IsJumping => isJumping;

        public override void OnNetworkSpawn()
        {
-            if (!IsOwner)
+            Debug.Log($"[PlayerMovement] LOCAL OnNetworkSpawn: OwnerClientId={OwnerClientId}, IsOwner={IsOwner}, IsServer={IsServer}, LocalClientId={NetworkManager.LocalClientId}");
+            ReportSpawnRpc(IsOwner, IsServer, IsLocalPlayer, NetworkManager.LocalClientId);
+
+            // 서버: 모든 플레이어의 이동 처리 담당
+            if (IsServer)
            {
-                enabled = false;
-                return;
+                characterController = GetComponent<CharacterController>();
+                characterController.enableOverlapRecovery = false;
+
+                if (skillController == null)
+                    skillController = GetComponent<SkillController>();
+                if (animator == null)
+                    animator = GetComponentInChildren<Animator>();
+
+                SetSpawnPosition();
            }

-            characterController = GetComponent<CharacterController>();
-            // 보스 콜라이더가 겹칠 때 Unity 내부 자동 밀어냄 비활성화.
-            // 적과의 분리는 EnemyBase.ResolvePlayerOverlap에서 보스 측이 담당.
-            characterController.enableOverlapRecovery = false;
-
-            if (skillController == null)
-                skillController = GetComponent<SkillController>();
-
-            if (animator == null)
-                animator = GetComponentInChildren<Animator>();
-
-            SetSpawnPosition();
-            InitializeInputActions();
-            SetupCamera();
+            // 오너: 입력 및 카메라 초기화
+            if (IsOwner)
+            {
+                InitializeInputActions();
+                SetupCamera();
+            }

+            // 서버도 오너도 아닌 클라이언트: 비활성화
+            if (!IsOwner && !IsServer)
+                enabled = false;
+        }

+        [Rpc(SendTo.Server)]
+        private void ReportSpawnRpc(bool isOwner, bool isServer, bool isLocalPlayer, ulong localClientId)
+        {
+            Debug.Log($"[PlayerMovement] SPAWN REPORT: OwnerClientId={OwnerClientId}, IsOwner={isOwner}, IsServer={isServer}, IsLocalPlayer={isLocalPlayer}, LocalClientId={localClientId}");
        }

        private void InitializeInputActions()
        {
            inputActions = new InputSystem_Actions();
            inputActions.Player.Enable();
-
            inputActions.Player.Move.performed += OnMovePerformed;
-            inputActions.Player.Move.canceled += OnMoveCanceled;
+            inputActions.Player.Move.canceled  += OnMoveCanceled;
            inputActions.Player.Jump.performed += OnJumpPerformed;
        }

@@ -80,7 +98,7 @@ namespace Colosseum.Player
            if (inputActions != null)
            {
                inputActions.Player.Move.performed -= OnMovePerformed;
-                inputActions.Player.Move.canceled -= OnMoveCanceled;
+                inputActions.Player.Move.canceled  -= OnMoveCanceled;
                inputActions.Player.Jump.performed -= OnJumpPerformed;
                inputActions.Player.Disable();
            }
@@ -98,7 +116,7 @@ namespace Colosseum.Player
            {
                inputActions.Player.Enable();
                inputActions.Player.Move.performed += OnMovePerformed;
-                inputActions.Player.Move.canceled += OnMoveCanceled;
+                inputActions.Player.Move.canceled  += OnMoveCanceled;
                inputActions.Player.Jump.performed += OnJumpPerformed;
            }
        }
@@ -121,11 +139,21 @@ namespace Colosseum.Player
        }

        private void OnMovePerformed(InputAction.CallbackContext context) => moveInput = context.ReadValue<Vector2>();
-        private void OnMoveCanceled(InputAction.CallbackContext context) => moveInput = Vector2.zero;
+        private void OnMoveCanceled(InputAction.CallbackContext context)  => moveInput = Vector2.zero;

        private void OnJumpPerformed(InputAction.CallbackContext context)
        {
-            if (!isJumping && characterController.isGrounded)
+            if (!IsOwner) return;
+            JumpRequestRpc();
+        }
+
+        /// <summary>
+        /// 클라이언트가 점프 요청 → 서버가 검증 후 실행
+        /// </summary>
+        [Rpc(SendTo.Server)]
+        private void JumpRequestRpc()
+        {
+            if (!isJumping && characterController != null && characterController.isGrounded)
                Jump();
        }

@@ -141,26 +169,44 @@ namespace Colosseum.Player

        private void Update()
        {
-            if (!IsOwner) return;
+            // 오너: 카메라 기준 이동 방향을 NetworkVariable에 기록
+            if (IsOwner)
+                UpdateNetworkInput();

-            ApplyGravity();
-            UpdateBlockedDirection();
-            Move();
+            // 서버: NetworkVariable을 읽어 실제 이동 처리
+            if (IsServer)
+            {
+                ApplyGravity();
+                UpdateBlockedDirection();
+                Move();
+            }
        }

        /// <summary>
-        /// 매 프레임 주변 적을 능동적으로 감지하여 blockedDirection을 설정합니다.
-        /// 콜백 기반이 아니므로 보스가 플레이어 쪽으로 밀고 올 때도 즉시 감지합니다.
+        /// 로컬 입력을 카메라 기준 월드 방향으로 변환해 NetworkVariable에 기록
+        /// </summary>
+        private void UpdateNetworkInput()
+        {
+            Vector3 dir = new Vector3(moveInput.x, 0f, moveInput.y);
+            if (dir.sqrMagnitude > 0.001f)
+                dir = TransformDirectionByCamera(dir).normalized;
+
+            Vector2 worldDir = new Vector2(dir.x, dir.z);
+            if (netMoveInput.Value != worldDir)
+                netMoveInput.Value = worldDir;
+        }
+
+        /// <summary>
+        /// 매 프레임 주변 적을 감지하여 blockedDirection 설정 (서버 전용)
        /// </summary>
        private void UpdateBlockedDirection()
        {
            blockedDirection = Vector3.zero;

-            Vector3 center = transform.position + characterController.center;
-            float radius = characterController.radius + 0.15f;
-            float halfHeight = Mathf.Max(0f, characterController.height * 0.5f - characterController.radius);
+            Vector3 center     = transform.position + characterController.center;
+            float   radius     = characterController.radius + 0.15f;
+            float   halfHeight = Mathf.Max(0f, characterController.height * 0.5f - characterController.radius);

-            // 레이어 무관하게 NavMeshAgent 유무로 적 식별
            int count = Physics.OverlapCapsuleNonAlloc(
                center + Vector3.up * halfHeight,
                center - Vector3.up * halfHeight,
@@ -193,7 +239,6 @@ namespace Colosseum.Player
        {
            if (characterController == null) return;

-            // 스킬 애니메이션 재생 중에는 이동 불가 (루트 모션은 OnAnimatorMove에서 처리)
            if (skillController != null && skillController.IsPlayingAnimation)
            {
                if (!skillController.UsesRootMotion)
@@ -201,11 +246,11 @@ namespace Colosseum.Player
                return;
            }

-            Vector3 moveDirection = new Vector3(moveInput.x, 0f, moveInput.y);
-            moveDirection = TransformDirectionByCamera(moveDirection);
-            moveDirection.Normalize();
+            // 클라이언트가 전송한 월드 스페이스 방향 사용
+            Vector3 moveDirection = new Vector3(netMoveInput.Value.x, 0f, netMoveInput.Value.y);
+            if (moveDirection.sqrMagnitude > 0.001f)
+                moveDirection.Normalize();

-            // 적 방향으로 이동 시도 중이면 수평 이동 전체 취소
            if (blockedDirection != Vector3.zero && Vector3.Dot(moveDirection, blockedDirection) > 0f)
                moveDirection = Vector3.zero;

@@ -239,27 +284,25 @@ namespace Colosseum.Player
        {
            if (Camera.main == null) return direction;

-            Transform cam = Camera.main.transform;
-            Vector3 forward = new Vector3(cam.forward.x, 0f, cam.forward.z).normalized;
-            Vector3 right = new Vector3(cam.right.x, 0f, cam.right.z).normalized;
+            Transform cam     = Camera.main.transform;
+            Vector3   forward = new Vector3(cam.forward.x, 0f, cam.forward.z).normalized;
+            Vector3   right   = new Vector3(cam.right.x,   0f, cam.right.z).normalized;

            return right * direction.x + forward * direction.z;
        }

        /// <summary>
-        /// 루트 모션 처리. 스킬 애니메이션 중 애니메이션의 이동/회전 데이터를 적용합니다.
-        /// 적 방향으로의 이동은 취소합니다.
+        /// 루트 모션 처리 (서버 전용 — NetworkTransform으로 동기화)
        /// </summary>
        private void OnAnimatorMove()
        {
-            if (!IsOwner) return;
+            if (!IsServer) return;
            if (animator == null || characterController == null) return;
            if (skillController == null || !skillController.IsPlayingAnimation) return;
            if (!skillController.UsesRootMotion) return;

            Vector3 deltaPosition = animator.deltaPosition;

-            // 적 방향으로 루트 모션이 향하면 수평 이동 취소
            if (blockedDirection != Vector3.zero)
            {
                Vector3 deltaXZ = new Vector3(deltaPosition.x, 0f, deltaPosition.z);
--- a/Assets/_Game/Scripts/Skills/SkillController.cs
+++ b/Assets/_Game/Scripts/Skills/SkillController.cs
@@ -1,5 +1,6 @@
 using UnityEngine;
 using System.Collections.Generic;
+using Unity.Netcode;

 namespace Colosseum.Skills
 {
@@ -7,7 +8,7 @@ namespace Colosseum.Skills
    /// 스킬 실행을 관리하는 컴포넌트.
    /// 애니메이션 이벤트 기반으로 효과가 발동됩니다.
    /// </summary>
-    public class SkillController : MonoBehaviour
+    public class SkillController : NetworkBehaviour
    {
        private const string SKILL_STATE_NAME = "Skill";
        private const string END_STATE_NAME = "SkillEnd";
@@ -19,6 +20,10 @@ namespace Colosseum.Skills
        [Tooltip("Skill 상태에 연결된 기본 클립 (Override용)")]
        [SerializeField] private AnimationClip baseSkillClip;

+        [Header("네트워크 동기화")]
+        [Tooltip("이 SkillController가 사용하는 모든 스킬/엔드 클립 (순서대로 인덱스 부여). 서버→클라이언트 클립 동기화에 사용됩니다.")]
+        [SerializeField] private List<AnimationClip> registeredClips = new();
+
        [Header("설정")]
        [SerializeField] private bool debugMode = false;
        [Tooltip("공격 범위 시각화 (Scene 뷰에서 확인)")]
@@ -34,6 +39,7 @@ namespace Colosseum.Skills
        // 쿨타임 추적
        private Dictionary<SkillData, float> cooldownTracker = new Dictionary<SkillData, float>();

+
        public bool IsExecutingSkill => currentSkill != null && !skillEndRequested;
        public bool IsPlayingAnimation => currentSkill != null;
        public bool UsesRootMotion => currentSkill != null && currentSkill.UseRootMotion;
@@ -55,6 +61,7 @@ namespace Colosseum.Skills
            }
        }

+
        private void Update()
        {
            if (currentSkill == null || animator == null) return;
@@ -166,6 +173,10 @@ namespace Colosseum.Skills
            animator.Rebind();
            animator.Update(0f);
            animator.Play(SKILL_STATE_NAME, 0, 0f);
+
+            // 클라이언트에 클립 동기화
+            if (IsServer && IsSpawned)
+                PlaySkillClipClientRpc(registeredClips.IndexOf(clip));
        }

        /// <summary>
@@ -187,6 +198,10 @@ namespace Colosseum.Skills
            animator.Rebind();
            animator.Update(0f);
            animator.Play(SKILL_STATE_NAME, 0, 0f);
+
+            // 클라이언트에 클립 동기화
+            if (IsServer && IsSpawned)
+                PlaySkillClipClientRpc(registeredClips.IndexOf(clip));
        }

        /// <summary>
@@ -198,6 +213,41 @@ namespace Colosseum.Skills
            {
                animator.runtimeAnimatorController = baseController;
            }
+
+            // 클라이언트에 복원 동기화
+            if (IsServer && IsSpawned)
+                RestoreBaseControllerClientRpc();
+        }
+
+        /// <summary>
+        /// 클라이언트: override 컨트롤러 적용 + 스킬 상태 재생 (원자적 실행으로 타이밍 문제 해결)
+        /// </summary>
+        [Rpc(SendTo.NotServer)]
+        private void PlaySkillClipClientRpc(int clipIndex)
+        {
+            if (baseSkillClip == null || animator == null || baseController == null) return;
+            if (clipIndex < 0 || clipIndex >= registeredClips.Count || registeredClips[clipIndex] == null)
+            {
+                if (debugMode) Debug.LogWarning($"[SkillController] Clip index {clipIndex} not found in registeredClips. Add it to sync to clients.");
+                return;
+            }
+
+            var overrideController = new AnimatorOverrideController(baseController);
+            overrideController[baseSkillClip] = registeredClips[clipIndex];
+            animator.runtimeAnimatorController = overrideController;
+            animator.Rebind();
+            animator.Update(0f);
+            animator.Play(SKILL_STATE_NAME, 0, 0f);
+        }
+
+        /// <summary>
+        /// 클라이언트: 기본 컨트롤러 복원
+        /// </summary>
+        [Rpc(SendTo.NotServer)]
+        private void RestoreBaseControllerClientRpc()
+        {
+            if (animator != null && baseController != null)
+                animator.runtimeAnimatorController = baseController;
        }

        /// <summary>
@@ -206,6 +256,8 @@ namespace Colosseum.Skills
        /// </summary>
        public void OnEffect(int index)
        {
+            if (NetworkManager.Singleton != null && !NetworkManager.Singleton.IsServer) return;
+
            if (currentSkill == null)
            {
                if (debugMode) Debug.LogWarning("[Effect] No skill executing");
@@ -246,6 +298,8 @@ namespace Colosseum.Skills
        /// </summary>
        public void OnSkillEnd()
        {
+            if (NetworkManager.Singleton != null && !NetworkManager.Singleton.IsServer) return;
+
            if (currentSkill == null)
            {
                if (debugMode) Debug.LogWarning("[SkillEnd] No skill executing");
--- a/Assets/_Game/Scripts/UI/LobbyUI.cs
+++ b/Assets/_Game/Scripts/UI/LobbyUI.cs
@@ -0,0 +1,231 @@
+using System.Collections.Generic;
+using Colosseum.Network;
+using TMPro;
+using Unity.Netcode;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace Colosseum.UI
+{
+    /// <summary>
+    /// 로비 씬 UI 제어.
+    /// 두 패널 구조:
+    ///   connectPanel  — IP/포트 입력 후 Host 또는 Join
+    ///   lobbyPanel    — 대기실 (플레이어 목록, 준비, 게임 시작)
+    /// </summary>
+    public class LobbyUI : MonoBehaviour
+    {
+        // ─── Connect Panel ────────────────────────────────────────
+        [Header("Connect Panel")]
+        [SerializeField] private GameObject connectPanel;
+        [SerializeField] private TMP_InputField ipInput;
+        [SerializeField] private TMP_InputField portInput;
+        [SerializeField] private Button hostButton;
+        [SerializeField] private Button joinButton;
+        [SerializeField] private TextMeshProUGUI connectStatusText;
+
+        // ─── Lobby Panel ──────────────────────────────────────────
+        [Header("Lobby Panel")]
+        [SerializeField] private GameObject lobbyPanel;
+        [SerializeField] private Transform playerListParent;
+        [SerializeField] private GameObject playerSlotPrefab;   // TextMeshProUGUI 하나 포함
+        [SerializeField] private Button readyButton;
+        [SerializeField] private Button startButton;            // 호스트만 표시
+        [SerializeField] private Button disconnectButton;
+
+        // ─── 내부 ─────────────────────────────────────────────────
+        private readonly List<GameObject> _slots = new();
+        private bool _isReady;
+
+        // ─── 초기화 ───────────────────────────────────────────────
+        private void Start()
+        {
+            ipInput.text = "127.0.0.1";
+            portInput.text = "7777";
+
+            hostButton.onClick.AddListener(OnHostClicked);
+            joinButton.onClick.AddListener(OnJoinClicked);
+            readyButton.onClick.AddListener(OnReadyClicked);
+            startButton.onClick.AddListener(OnStartClicked);
+            disconnectButton.onClick.AddListener(OnDisconnectClicked);
+
+            ShowConnectPanel();
+        }
+
+        private void OnEnable()
+        {
+            if (NetworkManager.Singleton == null) return;
+            NetworkManager.Singleton.OnClientConnectedCallback += OnConnectionEvent;
+            NetworkManager.Singleton.OnClientDisconnectCallback += OnConnectionEvent;
+        }
+
+        private void OnDisable()
+        {
+            if (NetworkManager.Singleton != null)
+            {
+                NetworkManager.Singleton.OnClientConnectedCallback -= OnConnectionEvent;
+                NetworkManager.Singleton.OnClientDisconnectCallback -= OnConnectionEvent;
+            }
+        }
+
+        // ─── Connect Panel 버튼 ───────────────────────────────────
+        private void OnHostClicked()
+        {
+            if (!TryGetAddress(out string ip, out ushort port)) return;
+            LobbyManager.Instance.StartHost(ip, port);
+            LobbyManager.Instance.OnPlayersChanged += RefreshPlayerList;
+            ShowLobbyPanel();
+        }
+
+        private void OnJoinClicked()
+        {
+            if (!TryGetAddress(out string ip, out ushort port)) return;
+            SetConnectStatus("Connecting...");
+            joinButton.interactable = false;
+            hostButton.interactable = false;
+
+            LobbyManager.Instance.StartClient(ip, port);
+
+            // 연결 성공/실패 대기
+            NetworkManager.Singleton.OnClientConnectedCallback += OnJoinSuccess;
+            NetworkManager.Singleton.OnTransportFailure += OnJoinFailed;
+        }
+
+        private void OnJoinSuccess(ulong clientId)
+        {
+            if (clientId != NetworkManager.Singleton.LocalClientId) return;
+
+            NetworkManager.Singleton.OnClientConnectedCallback -= OnJoinSuccess;
+            NetworkManager.Singleton.OnTransportFailure -= OnJoinFailed;
+
+            LobbyManager.Instance.OnPlayersChanged += RefreshPlayerList;
+            ShowLobbyPanel();
+        }
+
+        private void OnJoinFailed()
+        {
+            NetworkManager.Singleton.OnClientConnectedCallback -= OnJoinSuccess;
+            NetworkManager.Singleton.OnTransportFailure -= OnJoinFailed;
+
+            SetConnectStatus("Connection failed. Check IP/Port.");
+            joinButton.interactable = true;
+            hostButton.interactable = true;
+        }
+
+        // ─── Lobby Panel 버튼 ─────────────────────────────────────
+        private void OnReadyClicked()
+        {
+            _isReady = !_isReady;
+            LobbyManager.Instance.SetReadyRpc(_isReady);
+            readyButton.GetComponentInChildren<TextMeshProUGUI>().text =
+                _isReady ? "Ready!" : "Ready";
+        }
+
+        private void OnStartClicked()
+        {
+            LobbyManager.Instance.StartGame();
+        }
+
+        private void OnDisconnectClicked()
+        {
+            LobbyManager.Instance.OnPlayersChanged -= RefreshPlayerList;
+            LobbyManager.Instance.Disconnect();
+            _isReady = false;
+            ShowConnectPanel();
+        }
+
+        // ─── 패널 전환 ────────────────────────────────────────────
+        private void ShowConnectPanel()
+        {
+            connectPanel.SetActive(true);
+            lobbyPanel.SetActive(false);
+            SetConnectStatus("");
+            hostButton.interactable = true;
+            joinButton.interactable = true;
+        }
+
+        private void ShowLobbyPanel()
+        {
+            connectPanel.SetActive(false);
+            lobbyPanel.SetActive(true);
+
+            bool isHost = NetworkManager.Singleton.IsHost;
+            startButton.gameObject.SetActive(isHost);
+            readyButton.gameObject.SetActive(!isHost);
+
+            RefreshPlayerList();
+        }
+
+        // ─── 플레이어 목록 갱신 ───────────────────────────────────
+        private void OnConnectionEvent(ulong _) => RefreshPlayerList();
+
+        private void RefreshPlayerList()
+        {
+            if (LobbyManager.Instance == null) return;
+
+            // 슬롯 수 맞추기
+            int count = LobbyManager.Instance.PlayerCount;
+            while (_slots.Count < count)
+            {
+                var slot = Instantiate(playerSlotPrefab, playerListParent);
+                _slots.Add(slot);
+            }
+            while (_slots.Count > count)
+            {
+                Destroy(_slots[^1]);
+                _slots.RemoveAt(_slots.Count - 1);
+            }
+
+            for (int i = 0; i < count; i++)
+            {
+                var data = LobbyManager.Instance.GetPlayer(i);
+                var label = _slots[i].GetComponentInChildren<TextMeshProUGUI>();
+                if (label != null)
+                    label.text = $"{data.PlayerName}  {(data.IsReady ? "[Ready]" : "")}";
+            }
+
+            // 호스트: 모두 준비됐을 때만 시작 활성화
+            if (NetworkManager.Singleton.IsHost)
+            {
+                bool allReady = AllPlayersReady();
+                startButton.interactable = allReady && count >= 1;
+            }
+        }
+
+        private bool AllPlayersReady()
+        {
+            if (LobbyManager.Instance == null) return false;
+            int count = LobbyManager.Instance.PlayerCount;
+            for (int i = 0; i < count; i++)
+            {
+                // 호스트 본인은 준비 체크 면제
+                if (LobbyManager.Instance.GetPlayer(i).ClientId ==
+                    NetworkManager.Singleton.LocalClientId) continue;
+
+                if (!LobbyManager.Instance.GetPlayer(i).IsReady) return false;
+            }
+            return count > 0;
+        }
+
+        // ─── 유틸 ─────────────────────────────────────────────────
+        private bool TryGetAddress(out string ip, out ushort port)
+        {
+            ip = ipInput.text.Trim();
+            if (string.IsNullOrEmpty(ip)) ip = "127.0.0.1";
+
+            if (!ushort.TryParse(portInput.text.Trim(), out port))
+            {
+                port = 7777;
+                SetConnectStatus("Invalid port number.");
+                return false;
+            }
+            return true;
+        }
+
+        private void SetConnectStatus(string msg)
+        {
+            if (connectStatusText != null)
+                connectStatusText.text = msg;
+        }
+    }
+}
--- a/Assets/_Game/Scripts/UI/LobbyUI.cs.meta
+++ b/Assets/_Game/Scripts/UI/LobbyUI.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: fa0ac7df4e465a4458e7d7dcc073d648
--- a/Assets/_Game/Scripts/Weapons/WeaponEquipment.cs
+++ b/Assets/_Game/Scripts/Weapons/WeaponEquipment.cs
@@ -34,6 +34,10 @@ namespace Colosseum.Weapons
        [Tooltip("시작 무기 (선택)")]
        [SerializeField] private WeaponData startingWeapon;

+        [Header("네트워크 동기화")]
+        [Tooltip("이 장착 시스템이 사용하는 모든 WeaponData 목록. 서버→클라이언트 무기 동기화에 사용됩니다.")]
+        [SerializeField] private System.Collections.Generic.List<WeaponData> registeredWeapons = new();
+
        // 캐싱된 소켓 Transform들
        private Transform rightHandSocket;
        private Transform leftHandSocket;
@@ -51,7 +55,7 @@ namespace Colosseum.Weapons
        private readonly System.Collections.Generic.Dictionary<StatType, StatModifier> activeModifiers
            = new System.Collections.Generic.Dictionary<StatType, StatModifier>();

-        // 무기 장착 상태 동기화
+        // 무기 장착 상태 동기화 (registeredWeapons 인덱스, -1 = 없음)
        private NetworkVariable<int> equippedWeaponId = new NetworkVariable<int>(-1);

        public WeaponData CurrentWeapon => currentWeapon;
@@ -81,14 +85,17 @@ namespace Colosseum.Weapons

        public override void OnNetworkSpawn()
        {
-            // 네트워크 변수 변경 콜백
            equippedWeaponId.OnValueChanged += HandleEquippedWeaponChanged;

-            // 서버에서 시작 무기 장착
            if (IsServer && startingWeapon != null)
            {
                EquipWeapon(startingWeapon);
            }
+            else if (!IsServer && equippedWeaponId.Value >= 0)
+            {
+                // 늦게 접속한 클라이언트: 현재 장착된 무기 시각화
+                SpawnWeaponVisualsLocal(equippedWeaponId.Value);
+            }
        }

        public override void OnNetworkDespawn()
@@ -150,14 +157,12 @@ namespace Colosseum.Weapons

        private void HandleEquippedWeaponChanged(int oldValue, int newValue)
        {
-            // -1이면 무기 해제, 그 외에는 무기 장착됨
-            // (GetInstanceID()는 음수를 반환할 수 있으므로 >= 0 체크 사용 불가)
+            if (IsServer) return; // 서버는 EquipWeapon/UnequipWeapon에서 직접 처리
+
            if (newValue == -1)
-            {
                UnequipWeaponInternal();
-            }
-            // 클라이언트에서는 서버에서 이미 장착된 무기 정보를 받아야 함
-            // TODO: WeaponDatabase에서 ID로 WeaponData 조회
+            else
+                SpawnWeaponVisualsLocal(newValue);
        }


@@ -192,8 +197,10 @@ namespace Colosseum.Weapons
            // 무기 외형 생성 및 부착
            SpawnWeaponVisuals(weapon);

-            // 네트워크 동기화 (간단한 ID 사용, 실제로는 WeaponDatabase 필요)
-            equippedWeaponId.Value = weapon.GetInstanceID();
+            // registeredWeapons 인덱스로 동기화
+            equippedWeaponId.Value = registeredWeapons.IndexOf(weapon);
+            if (equippedWeaponId.Value < 0)
+                Debug.LogWarning($"[WeaponEquipment] '{weapon.WeaponName}' is not in registeredWeapons. Add it to sync to clients.");

            // 이벤트 발생
            OnWeaponEquipped?.Invoke(weapon);
@@ -236,12 +243,10 @@ namespace Colosseum.Weapons
        /// </summary>
        private void UnequipWeaponInternal()
        {
-            if (currentWeapon == null) return;
+            if (currentWeaponInstance == null && currentWeapon == null) return;

            WeaponData previousWeapon = currentWeapon;
-            RemoveStatBonuses();
-            DespawnWeaponVisuals();
-            currentWeapon = null;
+            DespawnWeaponVisualsLocal();

            OnWeaponUnequipped?.Invoke(previousWeapon);
        }
@@ -294,13 +299,12 @@ namespace Colosseum.Weapons
        }

        /// <summary>
-        /// 무기 외형 생성 및 부착
+        /// 무기 외형 생성 및 부착 (서버)
        /// </summary>
        private void SpawnWeaponVisuals(WeaponData weapon)
        {
            if (weapon == null || weapon.WeaponPrefab == null) return;

-            // 적절한 소켓 찾기
            Transform socket = GetSocketForSlot(weapon.WeaponSlot);
            if (socket == null)
            {
@@ -308,59 +312,63 @@ namespace Colosseum.Weapons
                return;
            }

-            // 무기 인스턴스 생성
-            currentWeaponInstance = Instantiate(weapon.WeaponPrefab, socket);
-            currentWeaponInstance.transform.localPosition = weapon.PositionOffset;
-            currentWeaponInstance.transform.localRotation = Quaternion.Euler(weapon.RotationOffset);
-
-            // 소켓 스케일 보정 (부모 스케일이 작은 경우 무기도 작아지는 문제 해결)
-            Vector3 scaleCompensation = new Vector3(
-                socket.lossyScale.x != 0 ? 1f / socket.lossyScale.x : 1f,
-                socket.lossyScale.y != 0 ? 1f / socket.lossyScale.y : 1f,
-                socket.lossyScale.z != 0 ? 1f / socket.lossyScale.z : 1f
-            );
-            currentWeaponInstance.transform.localScale = Vector3.Scale(weapon.Scale, scaleCompensation);
            currentWeaponInstance = Instantiate(weapon.WeaponPrefab, socket);
            currentWeaponInstance.transform.localPosition = weapon.PositionOffset;
            currentWeaponInstance.transform.localRotation = Quaternion.Euler(weapon.RotationOffset);
            currentWeaponInstance.transform.localScale = weapon.Scale;

-            // 디버그: 스케일 정보 출력
-            Debug.Log($"[WeaponEquipment] Weapon instantiated - LocalScale: {currentWeaponInstance.transform.localScale}, LossyScale: {currentWeaponInstance.transform.lossyScale}");
-            Debug.Log($"[WeaponEquipment] Socket: {socket.name}, Socket scale: {socket.lossyScale}");
-            Debug.Log($"[WeaponEquipment] Position offset: {weapon.PositionOffset}, Rotation offset: {weapon.RotationOffset}");
-
-            // 네트워크 동기화를 위해 Spawn (서버에서만)
-            if (IsServer && currentWeaponInstance.TryGetComponent<NetworkObject>(out var networkObject))
-            {
-                networkObject.Spawn(true);
-            }
-
            Debug.Log($"[WeaponEquipment] Spawned weapon visual: {weapon.WeaponName}");
        }

        /// <summary>
-        /// 무기 외형 제거
+        /// 클라이언트: registeredWeapons 인덱스로 무기 외형 생성
+        /// </summary>
+        private void SpawnWeaponVisualsLocal(int weaponIndex)
+        {
+            if (weaponIndex < 0 || weaponIndex >= registeredWeapons.Count || registeredWeapons[weaponIndex] == null)
+            {
+                Debug.LogWarning($"[WeaponEquipment] Weapon index {weaponIndex} not found in registeredWeapons.");
+                return;
+            }
+
+            var weapon = registeredWeapons[weaponIndex];
+            if (weapon.WeaponPrefab == null) return;
+
+            DespawnWeaponVisualsLocal();
+
+            Transform socket = GetSocketForSlot(weapon.WeaponSlot);
+            if (socket == null)
+            {
+                Debug.LogWarning($"[WeaponEquipment] No socket found for slot: {weapon.WeaponSlot}");
+                return;
+            }
+
+            currentWeaponInstance = Instantiate(weapon.WeaponPrefab, socket);
+            currentWeaponInstance.transform.localPosition = weapon.PositionOffset;
+            currentWeaponInstance.transform.localRotation = Quaternion.Euler(weapon.RotationOffset);
+            currentWeaponInstance.transform.localScale = weapon.Scale;
+            currentWeapon = weapon;
+        }
+
+        /// <summary>
+        /// 무기 외형 제거 (서버)
        /// </summary>
        private void DespawnWeaponVisuals()
        {
            if (currentWeaponInstance == null) return;
-
-            // 네트워크 Object면 Despawn
-            if (currentWeaponInstance.TryGetComponent<NetworkObject>(out var networkObject) && networkObject.IsSpawned)
-            {
-                if (IsServer)
-                {
-                    networkObject.Despawn(true);
-                }
-            }
-            else
-            {
-                Destroy(currentWeaponInstance);
-            }
-
+            Destroy(currentWeaponInstance);
            currentWeaponInstance = null;
-            Debug.Log("[WeaponEquipment] Despawned weapon visual");
+        }
+
+        /// <summary>
+        /// 무기 외형 제거 (클라이언트)
+        /// </summary>
+        private void DespawnWeaponVisualsLocal()
+        {
+            if (currentWeaponInstance == null) return;
+            Destroy(currentWeaponInstance);
+            currentWeaponInstance = null;
+            currentWeapon = null;
        }

        /// <summary>
--- a/ProjectSettings/EditorBuildSettings.asset
+++ b/ProjectSettings/EditorBuildSettings.asset
@@ -5,6 +5,9 @@ EditorBuildSettings:
  m_ObjectHideFlags: 0
  serializedVersion: 2
  m_Scenes:
+  - enabled: 1
+    path: Assets/Scenes/Lobby.unity
+    guid: 1999405fa34dae341b5f919ead00585b
  - enabled: 1
    path: Assets/Scenes/SampleScene.unity
    guid: 99c9720ab356a0642a771bea13969a05