Act as a distributed-systems engineer. Build The Webhook Event Ordering Detective, an interactive simulator that reveals how duplicated, delayed, and out-of-order webhook events can corrupt application state.
Allow developers to define event types, event IDs, entity IDs, timestamps, expected ordering, and state-transition rules.
The application must:
Generate configurable event streams containing duplicates, delays, missing events, and reordered messages.
Show how a consumer's state changes after each event.
Detect duplicate processing and invalid state transitions.
Compare naive processing with idempotency keys, event version checks, and reconciliation strategies.
Demonstrate why event arrival order may differ from event creation order.
Visualize the event timeline alongside the resulting entity state.
Generate regression cases for problematic event sequences.
Export reproducible scenarios and event logs as JSON.
Include examples for payment updates, order fulfillment, and inventory reservations. Run all scenarios in a local simulation without calling real customer endpoints. Clearly distinguish event-time ordering from processing-time ordering and make every experiment reproducible.
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