database

Scala functional programming with Cats Effect IO and typeclasses. Use for wrapping side effects, modeling purity, choosing Sync/Async/Temporal/Concurrent, handling blocking I/O, and composing resources, fibers, and concurrency safely.

Scala resource lifecycle management with Cats Effect `Resource` and `IO`. Use when defining safe acquisition/release, composing resources (including parallel acquisition), or designing resource-safe APIs and cancellation behavior for files, streams, pools, clients, and background fibers.

Kotlin design for Java libraries and Java consumers. Use when building Kotlin code intended for Java callers, aligning with Java interop, JVM annotations, records, and backward/binary compatibility rules.