I have an idea for a feature-rich shell tailored for women’s health and productivity. The core idea is a menstrual cycle calendar integrated into the shell with these features: • Cycle tracking: Track period start/end, ovulation, and fertile days. • Notifications: Send email reminders when the period is expected to start. • Server-friendly: Run in the background on a server, integrating with cron or systemd. • Privacy-first: All data stored locally with optional encrypted backups. • CLI-friendly interface: Commands like cycle status, cycle next, cycle log.

It would be a complex, useful, and empowering tool for anyone who wants to combine shell productivity with personal health. I’d love to explore implementing this in Rust.