import time
from threading import Lock

class WriteThrottle:
    def __init__(self, min_interval_seconds: float = 3.0):
        self.min_interval = min_interval_seconds
        self._lock = Lock()
        self._last_ts = 0.0

    def before_write(self) -> None:
        with self._lock:
            now = time.time()
            delta = now - self._last_ts
            if delta < self.min_interval:
                time.sleep(self.min_interval - delta)
            self._last_ts = time.time()