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Why webhooks miss events and how reconciliation sweeps catch what they drop

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Webhooks are best-effort notifications, so endpoint timeouts, deployment disruptions, and exhausted retry queues can cause events to go missing without anyone noticing. Those gaps are dangerous because a system relying only on events will show an incomplete, misleadingly healthy picture. The Swipe Again recovery platform therefore treats webhooks as the fast path and runs reconciliation sweeps that compare the platform's own records against its internal data. It also performs a 90-day backfill at connection time to establish ground truth before live events begin. The author argues this pattern of pairing fast events with periodic reconciliation applies broadly to any system whose failures are invisible by design.

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