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crowd-funder-for-time-pwa
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crowd-funder-for-time-pwa/doc/GLOSSARY.md

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Glossary

T (slot time) — The local wall-clock time a notification is intended to fire (e.g., 08:00).

T–lead — The moment {prefetchLeadMinutes} minutes before T when the system attempts a background prefetch to refresh content.

  • Example: If T = 12:00 and prefetchLeadMinutes = 20, then T–lead = 11:40.
  • If background prefetch is skipped/denied, delivery still occurs using the most recent cached payload (rolling-window safety).
  • T–lead governs prefetch attempts, not arming. We still arm one-shot locals early (rolling window) so closed-app delivery is guaranteed.

Rolling window — Always keep today’s remaining one-shot locals armed (and optionally tomorrow, within iOS caps) so the OS can deliver while the app is closed.

TTL (time-to-live) — Maximum allowed staleness of a payload at fire time. If the projected age at T exceeds ttlSeconds, we skip arming.

Exact alarm (Android) — Minute-precise alarm via AlarmManager.setExactAndAllowWhileIdle, subject to policy and permission.

Windowed alarm (Android) — Batched/inexact alarm via setWindow(start,len); we target ±10 minutes when exact alarms are unavailable.

Start-on-Login — Electron feature that automatically launches the application when the user logs into their system, enabling background notification scheduling and delivery after system reboot.