Show HN: Lupen – which Claude Code turn or sub-agent ran up your bill

Category: devtools

Tags: cost-tracking, ai-expenses, claude-code

Score: 7.8/10 (Innovation: 7, Technical: 8, Documentation: 9, Utility: 7)

Lupen is a macOS-native app that provides detailed, itemized cost breakdowns for Claude Code and Codex sessions by parsing local log files. It offers turn-by-turn, sub-agent, and token-level verification against public pricing, filling a gap for developers needing granular AI spend transparency without network calls.

Target audience: backend devs, data engineers, AI users

Repository: https://github.com/momoraul/Lupen · Swift · MIT · 28 stars

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