kafka-event-driven-design

Kafka event-driven architecture designer and reviewer. ALWAYS use when designing, reviewing, or troubleshooting Kafka-based event systems — topic design, partition strategy, consumer group configuration, event schema definition (Avro/Protobuf/JSON), idempotent consumers, dead letter queues, exactly-once semantics, Schema Registry compatibility, backpressure handling, and consumer lag monitoring. Use even for "just publish an event" — Kafka's partition-ordered-not-globally-ordered semantics, at-least-once default delivery, and consumer rebalance storms are the source of most production event-driven bugs.