from typing import Dict, Any, Optional


def change_detection_in_datasets(
    dataset_id: str,
    baseline_version: str,
    current_version: str,
    keys: Optional[list] = None,
    threshold: float = 0.0
) -> Dict[str, Any]:
    """
    Change Detection in Datasets (placeholder intent)

    Parameters
    ----------
    dataset_id : str
    baseline_version : str
    current_version : str
    keys : list | None
        Key columns to match records.
    threshold : float
        Minimum absolute change to flag.
    """
    return {
        "type": "automation_change_detection",
        "dataset_id": dataset_id,
        "versions": {"baseline": baseline_version, "current": current_version},
        "options": {"keys": keys or [], "threshold": threshold},
        "preview": {"will_compare": True},
    }
