JetBrains/koog 0.5.3

on GitHub

Published 12 November 2025

New Features

• Reasoning messages support (#943)
• Add get models list request to OpenAI-based LLMClients (#1074)

Improvements

• Support subgraph execution events in an agent pipeline and features, including OpenTelemetry (#1052)
• Make systemPrompt and temperature optional, set default temperature to null in AIAgent factory functions (#1078)
• Improve compatibility with kotlinx-coroutines 1.8 in runtime by removing featurePrepareDispatcher from AIAgentPipeline (#1083)

Bug Fixes

• Fix persistence feature by making ReceivedToolResult serializable (#1049)
• Make clients properly rethrow cancellations and remove exception wrapping (#1057)
• Fix StructureFixingParser to do the right number of retires (#1084)