diff --git a/scripts/init.py b/scripts/init.py
index 06a0290..32f9b17 100644
--- a/scripts/init.py
+++ b/scripts/init.py
@@ -134,8 +134,9 @@ def update_file(filepath: str, file_replacements: list[tuple[re.Pattern, str]]):
             return
         new_content = content
         for pattern, replacement in file_replacements:
-            # Use a lambda for replacement to avoid regex backreference injection
-            new_content = pattern.sub(lambda _, r=replacement: r, new_content)
+            # Performance Optimization: Escape backslashes in replacement string so re.sub handles
+            # it directly in C without invoking a Python lambda function per match or risking Ruff B023.
+            new_content = pattern.sub(replacement.replace("\\", "\\\\"), new_content)
 
         if new_content != content:
             path.write_text(new_content)