@klyftig/alarm-audio

Expo native module: alarm-stream audio playback that survives silent mode. Extracted from Sleepwise's modules/sleepwise-alarm-audio (2026-09-15); the Kotlin/Swift identifiers still carry the SleepwiseAlarmAudio name.

• Android — AlarmAudioService, a foreground service (mediaPlayback) playing on USAGE_ALARM / STREAM_ALARM, so the tone rings on silent and vibrate. Volume ramp, extra-loud escalation, repeating vibration, audio focus, stopWithTask=false + START_REDELIVER_INTENT (self-heals ~5 s after an OEM force-kill), isPlaying() re-entry guard.
• iOS — AVAudioSession .playback (silent-switch exempt) looping player. Written, unverified on a physical iPhone.

import { playAlarmAudio, stopAlarmAudio, setAlarmAudioMuted, isAlarmRinging, isAlarmAudioAvailable } from '@klyftig/alarm-audio';
playAlarmAudio(uri, { loop: true, volume: 0.8, ramp: true, extraLoudAfterSec: 30, vibrate: true });

Off-device (web / jest) requireNativeModule throws and the bridge degrades to no-ops; isAlarmAudioAvailable() reports it. Consumers usually go through @klyftig/alarm-core's startAlarmSound(alarm) which resolves the tone first.

Autolinks from node_modules (expo-module.config.json); needs a dev client and a prebuild after install.