diff --git a/scripts/normalize-code-blocks.py b/scripts/normalize-code-blocks.py
index b35f7bc5..b9870d6b 100644
--- a/scripts/normalize-code-blocks.py
+++ b/scripts/normalize-code-blocks.py
@@ -50,7 +50,11 @@ def normalize_code_block(match: re.Match) -> str:
 
     normalized = "\n".join(lines)
 
-    return f"{open_tag}{normalized}\n{close_tag}"
+    # Normalize open_tag: strip trailing whitespace/newlines, add single newline
+    # The regex \s*\n can capture extra newlines in open_tag
+    clean_open = open_tag.rstrip() + "\n"
+
+    return f"{clean_open}{normalized}\n{close_tag}"
 
 
 def process_line(line: str) -> tuple[str, int]: