JetBrains Ships Koog Java API: Enterprise Agent Framework Gets Fluent Builder-Style Java Interop Across JVM, Android, iOS, and Browser

JetBrains AI Blog·medium signal

JetBrains expanded Koog, its JVM-native agent framework, with a fully idiomatic Java API featuring builder-style patterns, thread pool executors, and native Java abstractions alongside the existing Kotlin DSL. Koog provides three workflow approaches (functional, graph-based, planning-based) with state persistence to disk/S3/database and automatic resume-from-checkpoint on failure. Built from JetBrains' internal AI product experience, Koog targets the massive Java enterprise ecosystem that has been underserved by Python-dominant agent frameworks.