Update code

prompt_builder.py

@@ -171,9 +171,9 @@ def build_refactor_prompt(
         "Follow these rules:\n"
         "1. Preserve the original behavior unless the user explicitly asked for functional changes.\n"
         "2. Preserve all existing function names, class names, method names, parameters, argument order, return behavior, and public interfaces.\n"
-        "3. Do not rename anything unless it is absolutely necessary, and avoid renaming by default.\n"
-        "4. Improve readability, maintainability, and structure only.\n"
-        "5. Keep the result practical and clean.\n"
+        "3. You must keep the original callable names exactly the same.\n"
+        "4. Do not rename variables, parameters, functions, classes, or methods unless absolutely necessary.\n"
+        "5. Improve readability, maintainability, and structure only.\n"
         "6. If the code is already simple and acceptable, make only minimal improvements.\n"
         "7. Return the improved code and a concise explanation of what was improved.\n\n"
         f"{shared}\n\n"