Can a prompt replace Calm?

Build a meditation session runner around audio you already have the right to play.

A session is a definition in a small YAML file: a warm-up silence, an optional guidance track, a body of silence with interval bells at chosen minutes, and a closing bell. The runner plays it and nothing else — no feed, no streak, no notifications.

The part worth building carefully is the bell. Use a recorded singing-bowl or bell sample with a natural decay rather than a synthesised tone, fade it in over 40 ms to avoid a click, and never truncate the tail when the next phase starts. A harsh bell at the end of twenty quiet minutes undoes the twenty minutes.

After each session, append a line to a plain-text log: date, session name, duration completed, and an optional one-line note. Completed means completed — a session ended early is logged as ended early, with the elapsed time. The log is the only record and it stays readable in a text editor forever.

Add one report: sessions per week over the last year as a simple chart, and the current and longest run of consecutive days. Print the honest version — "practised on 14 of the last 30 days" — rather than a streak that resets to zero and makes you feel worse.

For sleep, add a fade-out mode: play a chosen track and ramp the volume to silence over a configured number of minutes, then stop cleanly.

Do not generate guided meditation scripts with a language model and read them with synthetic speech. The voice is the product here, and a synthetic one narrating generated text is worse than silence.