fix missing save

commit_difference.py

@@ -76,6 +76,8 @@ def commit_difference(id, difference):
                     # assert unique, tag should not be iterable
                     assert not isinstance(tag, list), f"Error: {tag} is iterable"
                     current_value.append(tag)
+        # commit changes
+        post_by_id.save()
     else:
         return
 def main(filepath="difference_cache.jsonl"):