kerf-cli: The Local Tool That Tamed My $178 Weekly Claude Code Bill
Claude Code promised 'no need to monitor cost'—until it torched 91% of my weekly limit in hours. I built kerf-cli to fight back, turning raw logs into actionable insights that saved me $140 a month.
⚡ Key Takeaways
- Kerf-cli turns Claude Code's raw JSONL logs into a queryable SQLite DB for precise cost breakdowns. 𝕏
- Enforces budgets via PreToolUse hooks, blocking overspend—unlike warnings from other tools. 𝕏
- Reveals hidden costs like 60-80% from cache reads; switching from Opus saves massively with no quality loss. 𝕏
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Originally reported by dev.to
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