A Claude Skill that tells you which credit card to swipe before you pay — ranks by real cashback after monthly caps, counts only the cards & wallets you actually use, knows Taiwan's local exclusion rules, and keeps all data on your own machine. · 付款前問一句就知道刷哪張卡最划算的 Claude Skill：只看你手上的卡、算扣掉上限後的實拿回饋、懂台灣在地排除規則、個資全留本機。