Performative Detector

def is_holding_with_one_hand(self, hand_landmarks) -> bool:
    """
    Detect if a single hand is in a holding/gripping position
    by checking if fingers are curled (bent)
    """
    # Get fingertip and PIP (middle joint) landmarks
    finger_tips = [
        self.mp_hands.HandLandmark.INDEX_FINGER_TIP,
        self.mp_hands.HandLandmark.MIDDLE_FINGER_TIP,
        self.mp_hands.HandLandmark.RING_FINGER_TIP,
        self.mp_hands.HandLandmark.PINKY_TIP,
    ]
    
    finger_pips = [
        self.mp_hands.HandLandmark.INDEX_FINGER_PIP,
        self.mp_hands.HandLandmark.MIDDLE_FINGER_PIP,
        self.mp_hands.HandLandmark.RING_FINGER_PIP,
        self.mp_hands.HandLandmark.PINKY_PIP,
    ]
    
    curled_fingers = 0
    for tip, pip in zip(finger_tips, finger_pips):
        tip_y = hand_landmarks.landmark[tip].y
        pip_y = hand_landmarks.landmark[pip].y
        
        # If fingertip is below PIP, finger is curled
        if tip_y > pip_y:
            curled_fingers += 1
    
    # Holding detected if 3+ fingers are curled
    return curled_fingers >= 3