I almost burned ₹4,000 on Claude API overnight — so I built llm-cost-guard

I almost burned ₹4,000 on Claude API overnight — so I built llm-cost-guard Last month I wrote what I thought was a harmless script. Batch-process 847 product descriptions through Claude. Summarize each one. Save to a CSV. Ship it and go to bed. The loop looked fine. Error handling was there. Retries were capped. I felt responsible. I woke up to a Slack ping from my own logging bot — not because anything crashed, but because something succeeded way too much. ₹4,000 gone. Overnight. On a side...