INSTRUCTION_MARKER = "<UNTRUSTED_DATA>"


def wrap_untrusted(source: str, text: str) -> str:
    """Make the data boundary explicit for the model; source text is never authority."""
    return f"{INSTRUCTION_MARKER}\nsource: {source}\n{text}\n</UNTRUSTED_DATA>"


def requires_human_decision(classification) -> bool:
    return classification.asks_new_decision or classification.blocker