Google AI Updates: September 21, 2026

1. ADK for Kotlin Hit 1.0 With Python Parity and an On-Device Path for Android

Google released version 1.0 of the Agent Development Kit for Kotlin, bringing the JVM story to feature parity with the existing Python and Java kits. The framework exposes idiomatic Kotlin APIs for orchestration, tool integration, persistence, memory, and human-in-the-loop workflows, and it is built on Kotlin Multiplatform so the same agent code targets server-side JVM applications and mobile devices. Google describes the architecture as agnostic to specific model backends, session providers, and memory systems, which means the choice of provider is a configuration concern rather than a rewrite.

The 1.0 release adds hierarchical multi-agent systems, context compaction for long multi-turn conversations, and session management that can pause and restore agent state. The Android-specific piece is the more interesting one: the kit supports LiteRT-LM and ML Kit for local inference alongside Firebase AI Logic for cloud and hybrid setups, so an Android app can run an agent entirely on device when the task allows and fall back to a hosted model when it does not. Code is on GitHub under google/adk-kotlin. Source