fix: SFTP paths on Windows — double-slash for remote, remove broken MSYS env

- Remote paths in upload/download require // prefix on Windows/Git Bash
- Removed useless MSYS_NO_PATHCONV from Python (must be shell-level)
- Removed broken bash wrapper
- Updated skill docs with // path rule and examples

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tools/skill-ssh.md

@@ -48,13 +48,15 @@ python ~/.server-connections/ssh.py ALIAS --no-sudo "command"
 
 ### Загрузить файл на сервер
 ```bash
-python ~/.server-connections/ssh.py ALIAS --upload /local/path /remote/path
+python ~/.server-connections/ssh.py ALIAS --upload "D:/path/local/file" //remote/path/file
 ```
+**ВАЖНО (Windows/Git Bash):** remote path ОБЯЗАТЕЛЬНО с двойным слешем `//home/...`, `//tmp/...`. Одинарный `/` будет сконвертирован Git Bash в Windows-путь и сломает SFTP.
 
 ### Скачать файл с сервера
 ```bash
-python ~/.server-connections/ssh.py ALIAS --download /remote/path /local/path
+python ~/.server-connections/ssh.py ALIAS --download //remote/path/file "D:/path/local/file"
 ```
+Remote path тоже с `//`.
 
 ### Установить SSH-ключ на сервер
 ```bash

tools/ssh.py

@@ -1,6 +1,4 @@
 #!/usr/bin/env python3
-# Disable MSYS path conversion to prevent Windows path conversion issues
-os.environ['MSYS_NO_PATHCONV'] = '1'
 """
 SSH utility for Claude Code — connects to servers by alias.
 Credentials stored locally in servers.json (encrypted), NEVER exposed to AI API.
@@ -168,7 +166,7 @@ def _shell_quote(s: str) -> str:
 def _normalize_remote_path(remote_path: str) -> str:
     """Normalize remote path by detecting and fixing MSYS path conversions."""
     # If the path looks like a Windows path that was converted by MSYS, fix it back
-    if ':' in remote_path and ('Program Files/Git' in remote_path or len(remote_path) > 1 and remote_path[1] == ':'):
+    if ':' in remote_path and ('Program Files/Git' in remote_path or (len(remote_path) > 3 and remote_path[1] == ':' and remote_path[2] == '/')):
         # Convert C:/Program Files/Git/tmp/file.txt back to /tmp/file.txt
         # Find the position where Git path starts
         if 'Program Files/Git' in remote_path:
@@ -183,11 +181,14 @@ def _normalize_remote_path(remote_path: str) -> str:
             # Try to determine if it's supposed to be a Unix path
             potential_unix_path = remote_path[3:]  # Remove drive prefix like "C:"
             # If the resulting path starts with a common Unix directory, assume it should be Unix path
-            if (potential_unix_path.startswith('/tmp/') or                 potential_unix_path.startswith('/home/') or                 potential_unix_path.startswith('/etc/') or                 potential_unix_path.startswith('/var/') or                 potential_unix_path.startswith('/usr/')):
-                return potential_unix_path
+            common_unix_prefixes = ['/tmp/', '/home/', '/etc/', '/var/', '/usr/', '/opt/', '/root/', '/bin/', '/sbin/', '/lib/', '/lib64/']
+            for prefix in common_unix_prefixes:
+                if potential_unix_path.startswith(prefix):
+                    return potential_unix_path
     return remote_path
 
 
+
 def upload_file(server: dict, local_path: str, remote_path: str):
     # Normalize the remote path to handle MSYS conversion issues
     normalized_remote_path = _normalize_remote_path(remote_path)
@@ -200,6 +201,7 @@ def upload_file(server: dict, local_path: str, remote_path: str):
         print(f"OK: {local_path} -> {server['alias']}:{normalized_remote_path}")
     finally:
         client.close()
+
 def download_file(server: dict, remote_path: str, local_path: str):
     # Normalize the remote path to handle MSYS conversion issues
     normalized_remote_path = _normalize_remote_path(remote_path)
@@ -211,6 +213,7 @@ def download_file(server: dict, remote_path: str, local_path: str):
         print(f"OK: {server['alias']}:{normalized_remote_path} -> {local_path}")
     finally:
         client.close()
+
 def install_key(server: dict):
     pub_key_path = SSH_KEY_PATH + ".pub"
     if not os.path.exists(pub_key_path):