Breathe CLI - Resonance Breathing Habit Trainer

A minimal CLI tool that guides users through paced breathing exercises (6 breaths per minute) for stress relief and vagal tone training. Health-conscious users want a friction-free daily breathing habit tracker that works in their terminal without app store barriers.

Wearables and HRV-tracking apps like Whoop and Garmin have pushed vagal tone and resonance breathing into mainstream wellness conversations, so the audience is primed and growing. No clear incumbent owns the CLI niche here — Othership and Breathwrk target mobile, leaving terminal-native users completely unserved. The $500–2k/mo band is realistic only as a one-time purchase or small lifetime deal product, since recurring subscription justification is thin for a single-function CLI tool. The biggest risk is ceiling, not failure — it's easy to build, easy to get early traction, and then nearly impossible to grow beyond a few hundred sales before the concept is fully saturated.