diff --git a/rwx/arg/__init__.py b/rwx/arg/__init__.py
index aa6e4b8..71ce0a7 100644
--- a/rwx/arg/__init__.py
+++ b/rwx/arg/__init__.py
@@ -1,6 +1,9 @@
+"""Handle system arguments."""
+
 import sys
 
 
 def split() -> tuple[str, list[str]]:
+    """Split command & actual arguments."""
     command, *arguments = sys.argv
     return command, arguments