diff --git a/.gitignore b/.gitignore
index e7c48d8a..9f9928d8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,3 +55,8 @@ node_modules/
 *.sub
 *.sub.run
 script_*.py
+# Job execution temporary files
+err
+log
+# JSON files with hash names (job state files)
+[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]*.json
diff --git a/doc/context.md b/doc/context.md
index bb09a5ee..627158d3 100644
--- a/doc/context.md
+++ b/doc/context.md
@@ -46,12 +46,12 @@ Specify the ProxyCommand directly using {dargs:argument}`proxy_command <machine[
     "hostname": "internal-server.company.com",
     "username": "user",
     "key_filename": "/path/to/internal_key",
-    "proxy_command": "ssh -W %h:%p -i /path/to/jump_key jumpuser@bastion.company.com"
+    "proxy_command": "ssh -W internal-server.company.com:22 -i /path/to/jump_key jumpuser@bastion.company.com"
   }
 }
 ```
 
-The proxy command uses OpenSSH ProxyCommand syntax. `%h` and `%p` are replaced with the target hostname and port.
+**Note**: Unlike OpenSSH, Paramiko's ProxyCommand requires explicit hostname and port instead of `%h:%p` placeholders. The proxy command must specify the actual target hostname and port that matches the `hostname` and `port` in the remote profile.
 
 This configuration establishes the connection path: Local → Jump Host → Target Server.
 
diff --git a/examples/machine/ssh_proxy_command.json b/examples/machine/ssh_proxy_command.json
index abca964b..8310397a 100644
--- a/examples/machine/ssh_proxy_command.json
+++ b/examples/machine/ssh_proxy_command.json
@@ -8,6 +8,6 @@
     "username": "user",
     "port": 22,
     "key_filename": "~/.ssh/id_rsa",
-    "proxy_command": "ssh -W %h:%p -i ~/.ssh/jump_key jumpuser@bastion.company.com"
+    "proxy_command": "ssh -W internal-server.company.com:22 -i ~/.ssh/jump_key jumpuser@bastion.company.com"
   }
 }