fix: update shell wrapper usage to include argument for remote execution

action.yml

@@ -183,16 +183,25 @@ runs:
         
         cat << 'WRAPPER_EOF' > "$WRAPPER_PATH"
         #!/bin/bash
-        set -e
-        
-        # Check if input file is provided
-        if [ -z "$1" ]; then
+        set -euo pipefail
+
+        # Runner normally passes a temp script path as the first argument.
+        # If that isn't present, allow script to be piped to stdin.
+        TMPDIR="${TMPDIR:-/tmp}"
+        SCRIPT_FILE=""
+        if [ -n "${1-}" ]; then
+          SCRIPT_FILE="$1"
+        elif ! [ -t 0 ]; then
+          # Write stdin to a temp file
+          TMP_SCRIPT=$(mktemp "$TMPDIR/ssh-remote-stdin-XXXXXX.sh" 2>/dev/null || mktemp -t ssh-remote-stdin-XXXXXX)
+          cat - > "$TMP_SCRIPT"
+          chmod +x "$TMP_SCRIPT"
+          SCRIPT_FILE="$TMP_SCRIPT"
+        else
           echo "Error: No script file provided" >&2
           exit 1
         fi
         
-        SCRIPT_FILE="$1"
-        
         # Check if script file exists
         if [ ! -f "$SCRIPT_FILE" ]; then
           echo "Error: Script file '$SCRIPT_FILE' not found" >&2
@@ -217,7 +226,7 @@ runs:
         if [ "${{ inputs.use-shell-wrapper }}" = "true" ]; then
           echo ""
           echo "To use the remote shell in subsequent steps, add:"
-          echo "  shell: ssh-remote"
+          echo "  shell: ssh-remote {0}"
           echo ""
           echo "The 'ssh-remote' shell is now available for use."
         fi