My agent burned $31 in a week. I asked which tool ate it - so I built the receipt.
typescript
dev.to
I can tell you my AI bill to the cent. Ask me which tool call caused it and I used to shrug. Last week I stared at my provider dashboard: a clean per-key total, zero line items. Which MCP tool ate the budget? Which framework surface did the agent re-read forty times? Was that "heavy" framework actually heavy for my workload? The dashboard had no answers. Hacker News had opinions - 215 points on ChatGPT/Codex limit merges, 291 on the AI cost of JavaScript frameworks. One dev.to author cut their