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message-queue-knowledge

Message Queue knowledge base. Provides broker comparison, delivery guarantees, consumer groups, and advanced RabbitMQ/Kafka patterns for messaging audits and generation.

skills/message-queue-knowledge/SKILL.md

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# Message Queue Knowledge Base

Quick reference for message broker operations and advanced messaging patterns. Focuses on broker-level operations — for event-driven patterns, see `eda-knowledge`.

## Broker Comparison

| Feature | RabbitMQ | Apache Kafka | Amazon SQS | Redis Streams |
|---------|----------|-------------|------------|---------------|
| Model | Message queue | Event log | Message queue | Event log |
| Ordering | Per-queue FIFO | Per-partition | Best-effort (FIFO available) | Per-stream |
| Retention | Until consumed | Time/size-based | 4-14 days | Memory/size-based |
| Replay | No (once consumed) | Yes (offset seek) | No | Yes (ID-based) |
| Consumer Groups | Competing consumers | Native support | Not built-in | Native (XREADGROUP) |
| Throughput | ~50K msg/s | ~1M msg/s | ~3K msg/s per queue | ~100K msg/s |