3 docs tagged with "architecture"

Broker GroupCoordinator internals: durable offsets via SingleWal (P3.B), state machine, KafkaOp 0x06-0x0B, FindCoordinator gateway-local, rebalance oneshot, recovery scan, and spans.

The iroh mesh substrate that every Rafka service rides: two planes, one QUIC connection per peer pair, and the stream wire grammar.

Engineering reference for the topic registry, id/slug/RRL identity model, KAFKA_OP_DELETE_TOPIC mesh rail, the Defect-A Metadata flag fix, and all new span emit sites.