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SYS/utils.py

@@ -124,7 +124,7 @@ def create_tags_sidecar(file_path: Path, tags: set) -> None:
     try:
         with open(tags_path, 'w', encoding='utf-8') as f:
             for tag in sorted(tags):
-                f.write(f"{tag}\n")
+                f.write(f"{str(tag).strip().lower()}\n")
     except Exception as e:
         raise RuntimeError(f"Failed to create tags sidecar {tags_path}: {e}") from e