Show HN: Breathe CLI – Paced resonance breathing in the macOS terminal | Hacker News

A developer released Breathe CLI, a macOS terminal app for paced resonance breathing at 6 breaths per minute.

The single-file Python tool is designed for a daily breathing habit and can be installed via pip or Homebrew.

It includes safety-focused limits such as no breath holds, no rapid cycles, capped exhale ratios, and instant quit behavior.

The README also shows how users can measure their own resonance frequency with HRV hardware.

The project aims to make clinically grounded breathing practice easier while supporting vagal tone and baroreflex sensitivity.