JetBrains/koog 0.7.2

on GitHub

Published 19 March 2026

Bug Fixes

• Java API for OpenTelemetry extensions: Fixed Java API inside OpenTelemetryConfig class annotated with @JavaOverride
  that relied on Kotlin Duration class, causing all further attributes to be skipped by the compiler in Langfuse and Weave extensions (KG-754, #1682)
• System prompt preservation in agent builder: Fixed systemPrompt method in agent builders to preserve previously configured messages, id, and params in the prompt (KG-747, #1671)
• LLMParams copy overloads: Added correct override fun copy() to all LLMParams subclasses (GoogleParams, AnthropicParams, OpenAIChatParams, etc.) so that Prompt.withUpdatedParams preserves provider-specific fields instead of silently dropping them. Also fixed BedrockConverseParams.copy() missing parameters and DashscopeParams incorrect super.copy() call (KG-742, #1668)

Breaking Changes

• Removed input parameter from AIAgentFunctionalContext.subtask: The input parameter was not actually used; taskDescription is the right way to specify the task. Related methods and builders updated accordingly (#1667)

Documentation

• Started porting rest of the documentation to Java (#1669)