{
  "approach": "Modify `_eval_expr` or related function in `semantics.py` to interpret \"None\" literal within backticks as actual None object rather than string.",
  "files_to_edit": [
    "tatsu/semantics.py"
  ],
  "finish_reason": "stop",
  "hypothesis": "`runtest_constexpr` incorrectly returns raw text when evaluating constant expressions inside backticks.",
  "retries": {},
  "usage": {
    "completion": 80,
    "prompt": 3971,
    "reasoning": 0
  }
}