Off / 5 / 10 / 15 / 30 / 45 / 60 minutes / end-of-chapter. The moon
pill sits in the settings strip between Bookmark and Volume and shows
the live mm:ss countdown while armed (or 'End of chapter'); the
dropdown's armed row highlights like Skip/Speed.
audio-sleep.ts is the pure, DOM-free state machine (arm/due/fired/
fade-ramp/label + the SLEEP_CHOICES vocabulary the templ dropdown
iterates). The component owns the timers: a 1s countdown ticker in
minutes mode, and a ~5s element-volume fade on expiry that ends in
audio.pause() — the SAME pause listener a manual pause fires, so the
progress push and media-session state land. The user's configured
volume is restored right after the pause, and the fade operates on
the element's volume the user controls, not a parallel path.
End-of-chapter fires when the armed chapter is left — natural
crossing (tickChapter) or a manual jump (jumpToChapter) alike. Manual
play during a fade aborts the expiry (you're awake, you asked);
stopSleep restores any partial fade. Per-session ONLY: nothing
touches localStorage — the reload check proves it starts Off.
sleepOpen joins closeTopSurface's dropdown branch, so Esc closes it
with the other settings-strip surfaces. Muted (or zero-volume) expiry
skips the pantomime and pauses immediately.
Unit: audio-sleep.test.ts (deadline mechanics, chapter-fired
semantics both directions, fade ramp clamps, label formatting,
SLEEP_CHOICES integrity). Live: 24 Playwright checks on the KJV book
— dropdown, countdown ticking, armed-row highlight, end-of-chapter
fire + reset, internal 3s deadline fade→pause→restore, play-abort,
reload-starts-Off; probe user created and deleted.
John O'Keefe
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