diff --git a/scripts/lib/__init__.py b/scripts/lib/__init__.py
index 3d7750b..ad821c4 100644
--- a/scripts/lib/__init__.py
+++ b/scripts/lib/__init__.py
@@ -9,26 +9,13 @@
 - 项目级配置管理
 - 流式输出和交互式会话
 - 批量并发操作
-
-快速开始:
-    from ssh_skill import SSHConfigLoader
-
-    # 加载配置
-    client = SSHConfigLoader.from_file(".ssh_config/prod.json")
-
-    # 执行命令
-    result = client.execute("whoami && hostname")
-    print(result.stdout)
-
-    # 批量操作
-    from ssh_skill import SSHCluster
-    cluster = SSHCluster.from_directory(".ssh_config/cluster/")
-    results = cluster.execute_all("uptime", parallel=True)
 """
 
-from .client import SSHClient, SSHResult
-from .config import SSHConfigLoader, ServerConfig
-from .cluster import SSHCluster, SSHBatchOperations
+from .config_v3 import SSHConfigLoaderV3
+from .native_ssh_client import NativeSSHClient, SSHResult
+from .paramiko_client import ParamikoClient
+from .cluster import SSHCluster
+from .sftp_transfer import SFTPTransfer
 from .utils import (
     check_ssh_available,
     get_ssh_version,
@@ -38,15 +25,12 @@
 __version__ = "0.1.0"
 
 __all__ = [
-    # 核心类
-    "SSHClient",
+    "SSHConfigLoaderV3",
+    "NativeSSHClient",
+    "ParamikoClient",
     "SSHResult",
-    "SSHConfigLoader",
-    "ServerConfig",
     "SSHCluster",
-    "SSHBatchOperations",
-
-    # 工具函数
+    "SFTPTransfer",
     "check_ssh_available",
     "get_ssh_version",
     "validate_key_file",
diff --git a/scripts/lib/paramiko_client.py b/scripts/lib/paramiko_client.py
index 00a198a..9406246 100644
--- a/scripts/lib/paramiko_client.py
+++ b/scripts/lib/paramiko_client.py
@@ -260,22 +260,25 @@ def _create_password_script(self) -> str:
         import stat
         import os
 
-        # 创建临时脚本文件
         fd, script_path = tempfile.mkstemp(suffix='.sh' if os.name != 'nt' else '.bat', text=True)
-
-        if os.name == 'nt':
-            # Windows 批处理脚本
-            script_content = f'@echo off\necho {self.password}\n'
-        else:
-            # Unix shell 脚本
-            script_content = f'#!/bin/sh\necho "{self.password}"\n'
-
-        with os.fdopen(fd, 'w') as f:
-            f.write(script_content)
-
-        # 设置可执行权限（Unix）
-        if os.name != 'nt':
-            os.chmod(script_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
+        try:
+            if os.name == 'nt':
+                script_content = f'@echo off\necho {self.password}\n'
+            else:
+                script_content = f'#!/bin/sh\necho "{self.password}"\n'
+
+            with os.fdopen(fd, 'w') as f:
+                f.write(script_content)
+            fd = -1  # fd 已被 os.fdopen 接管并关闭
+
+            if os.name != 'nt':
+                os.chmod(script_path, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR)
+        except Exception:
+            if fd >= 0:
+                os.close(fd)
+            if os.path.exists(script_path):
+                os.unlink(script_path)
+            raise
 
         return script_path
 
diff --git a/scripts/ssh_daemon.py b/scripts/ssh_daemon.py
index 2832a41..42d4b53 100644
--- a/scripts/ssh_daemon.py
+++ b/scripts/ssh_daemon.py
@@ -54,7 +54,8 @@ def get_daemon_id(alias: str) -> str:
 
 def get_daemon_info_path(alias: str) -> str:
     """获取守护进程信息文件路径"""
-    os.makedirs(DAEMON_DIR, exist_ok=True)
+    os.makedirs(DAEMON_DIR, mode=0o700, exist_ok=True)
+    os.chmod(DAEMON_DIR, 0o700)
     return os.path.join(DAEMON_DIR, f'{get_daemon_id(alias)}.json')
 
 
@@ -174,6 +175,7 @@ def start(self):
         info_path = get_daemon_info_path(self.alias)
         with open(info_path, 'w', encoding='utf-8') as f:
             json.dump(info, f, ensure_ascii=False, indent=2)
+        os.chmod(info_path, 0o600)
 
         # 输出启动信息到 stdout
         try:
diff --git a/scripts/ssh_tunnel.py b/scripts/ssh_tunnel.py
index 13f3ecf..1fa8b83 100644
--- a/scripts/ssh_tunnel.py
+++ b/scripts/ssh_tunnel.py
@@ -68,7 +68,8 @@ def get_tunnel_id(alias: str, local_port: int) -> str:
 
 def get_tunnel_info_path(tunnel_id: str) -> str:
     """获取 tunnel 信息文件路径"""
-    os.makedirs(TUNNEL_DIR, exist_ok=True)
+    os.makedirs(TUNNEL_DIR, mode=0o700, exist_ok=True)
+    os.chmod(TUNNEL_DIR, 0o700)
     # 使用 MD5 避免特殊字符问题
     safe_id = hashlib.md5(tunnel_id.encode('utf-8')).hexdigest()[:16]
     return os.path.join(TUNNEL_DIR, f'{safe_id}.json')
@@ -208,6 +209,7 @@ def start(self):
         info_path = get_tunnel_info_path(self.tunnel_id)
         with open(info_path, 'w', encoding='utf-8') as f:
             json.dump(info, f, ensure_ascii=False, indent=2)
+        os.chmod(info_path, 0o600)
 
         # 输出启动信息
         print(json.dumps({