Dead-Letter Queue

Deltas that persistently fail constraint validation on Origin are routed to a dead-letter queue (DLQ). Each entry includes diagnostic metadata: the original delta, the constraint that failed, and the compensation hint.

Inspection

Operators can inspect DLQ entries to understand why syncs are failing and take corrective action.

Resolution Options

• Replay — Fix the constraint issue and replay the delta
• Discard — Permanently discard the failed delta
• Manual merge — Resolve the conflict manually and apply a corrected delta

Trigger DLQ

AFTER triggers that persistently fail (after retry with exponential backoff) also route to the DLQ. This applies to both CRDT sync triggers and regular async triggers.