Koog 1.0 Is Out: Stable Core, Better Interop, and Multiplatform Observability | The JetBrains AI Blog

Koog 1.0 is JetBrains' open-source framework designed to build AI agents using Kotlin and Java, offering tools, workflows, persistence, memory, observability, and integration capabilities with JVM and Kotlin Multiplatform projects. Announced at KotlinConf 2026, this release emphasizes stability, guaranteeing no breaking changes for stable modules for at least a year, and introduces significant enhancements such as local Android AI support, a redesigned Java interoperability layer, decoupled HTTP transport, and OpenTelemetry support across various environments. It also improves persistence and memory for long-running agents and includes Anthropic prompt caching to reduce latency and token costs. Koog 1.0 includes numerous fixes and API cleanups, positioning it as a robust foundation for enterprise-ready AI agent development, while encouraging users to incorporate the stable core modules into their projects and add Beta modules for evolving functionalities.