Kotlin concurrency and Flow Core principle Give asynchronous work an explicit owner and lifetime, then model durable state and transient events with primitives whose delivery and replay semantics match the product contract. Procedure 1. Identify each coroutine owner, cancellation boundary, producer, consumer, durable state, and transient event. 2. Before changing an API, compare its existing caller-visible contract with the required owner and lifetime. If a suspend API already gives its caller cancellation, result, and failure ownership, finish with no change; do not add a scope, , callback,…