Claude Skills by cache-refund

Analyze this machine's Claude Code prompt-cache economy and report what the cache saved, what it leaked (attributed to causes), and — for API-billed users on the 5-minute default — whether enabling the 1-hour cache TTL would save money. Use when the user asks about their Claude Code cache cost, prompt-cache savings or waste, cache efficiency, the 1-hour vs 5-minute TTL, whether to set ENABLE_PROMPT_CACHING_1H, "am I leaking money on cache", "run cache-refund", or "is my cache TTL costing me"....