Function isRateLimited

src/proxy.ts:497–507

* Check if a model is currently rate-limited (in cooldown period).

(modelId: string)

 * Check if a model is currently rate-limited (in cooldown period).
 */
function isRateLimited(modelId: string): boolean {
  const hitTime = rateLimitedModels.get(modelId);
  if (!hitTime) return false;

  const elapsed = Date.now() - hitTime;
  if (elapsed >= RATE_LIMIT_COOLDOWN_MS) {
    rateLimitedModels.delete(modelId);
    return false;
  }
  return true;
}

/**
 * Mark a model as rate-limited.