Kafka Expert

This is your go-to when you're building event-driven systems with Kafka and need to get producers, consumers, and stream processing right. It covers the essentials like partition strategies, consumer groups, and exactly-once semantics, with working Python and Java examples for both basic pub-sub and Kafka Streams transformations. The skill explicitly warns against common mistakes like single-partition topics and ignoring consumer lag, which honestly saves you from production headaches. If you're setting up distributed messaging or need to debug why your consumer group is rebalancing constantly, this gives you the patterns and anti-patterns without the fluff.