Function _require_string

src/task/specs/task_draft_pipeline.py:97–101

(payload: Mapping[str, object], key: str)

def _require_string(payload: Mapping[str, object], key: str) -> str:
    value = payload.get(key)
    if not isinstance(value, str):
        raise ValueError(f"{key} must be a string.")
    return value