Lupen

Itemized, verified cost receipts for Claude Code and Codex, tracked locally by turn.

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Lupen is a free, open-source itemized, verified cost receipts for Claude Code and Codex, tracked locally by turn. It's built for developers wanting a clear breakdown of AI coding costs, filling a gap most generic tools don't address directly.

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Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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