import pandas as pd
import numpy as np

def run_hf_predictions(df: pd.DataFrame) -> pd.DataFrame:
    """
    Simulates Hugging Face-based fault predictions.
    """
    df["HealthScore"] = np.random.uniform(0.2, 1.0, size=len(df))
    df["AlertLevel"] = df["HealthScore"].apply(
        lambda x: "Red" if x < 0.4 else "Yellow" if x < 0.7 else "Green"
    )
    return df