diff --git a/backend/prompt.py b/backend/prompt.py
index 6c35132..10ed6db 100644
--- a/backend/prompt.py
+++ b/backend/prompt.py
@@ -37,8 +37,13 @@ def _sanitize_language_id(language_id: str) -> str:
 def _prepare_context(prefix: str, suffix: str) -> Tuple[str, str]:
     """
     Prepare prefix/suffix for model completion context.
+    Filter out potential web-scraping or legacy artifacts like <br>, <br/>, <br\>.
     """
-    return prefix, suffix
+    import re
+    br_pattern = re.compile(r'<br\s*/?\s*\\?>', re.IGNORECASE)
+    clean_prefix = br_pattern.sub('', prefix or "")
+    clean_suffix = br_pattern.sub('', suffix or "")
+    return clean_prefix, clean_suffix
 
 
 def prepare_prompt_context(prefix: str, suffix: str) -> Tuple[str, str]: