0.8.0

Published 10 April 2026

Major Features

Spring AI Integration: Added comprehensive Spring AI support with ChatMemoryRepository and VectorStore integration for seamless persistence and retrieval (#1719, #1763)
Amazon Bedrock AgentCore Memory: Introduced ChatHistoryProvider backed by Amazon Bedrock AgentCore Memory for managed conversation state (#1758)
DataDog LLM Observability: Added DataDog LLM Observability exporter with response metadata forwarding to inference spans (#1591)

Native structured output for Claude 4.5+: Added JSON Schema support for Claude 4.5+ series models across Anthropic, Bedrock, and Vertex AI providers (#1593)
Mermaid diagram support for nested subgraphs: Enhanced Mermaid diagram generator to visualize subgraphs and nested subgraphs (#1745)
RAG-based abstractions:LongTermMemory feature now uses cleaner abstractions from rag-base for better modularity (#1785)
LLMClient constructor decoupling: Decoupled LLMClient constructors from Ktor for improved flexibility (#1742)
Customizable field names: Added support for customized field names in AdditionalPropertiesFlatteningSerializer (#1626)
GPT-5.4 models: Added support for GPT-5.4Mini and GPT-5.4Nano models (#1837)
Google models update: Updated Google models capabilities and deprecated older model versions (#1827)
Environment creation abstraction: Extracted environment creation into prepareEnvironment method in agent implementations for better extensibility (#1790)
Reasoning prompt refactoring: Moved reasoning prompt configuration to strategy parameters for better encapsulation (#1789)
JSON schema capabilities: Added JSON schema capabilities to OpenAI models (#1822)
Add missing JavaAPI for history compression inside write session: Added replaceHistoryWithTLDR as non-suspend method of AIAgentWriteSession (#1839)

Agent message handling: Corrected description of Koog agent message handling (#1010)
History compression with chat memory: Fixed missed prompt messages when chat memory feature is enabled (#1835)
Reasoning messages: Added IDs for reasoning messages and improved reasoning process to fix status 400 errors from OpenAI (#1779)
Ollama embedding: Check HTTP status before deserializing Ollama embedding response to prevent parsing errors (#1702)
Ktor parameter shadowing: Renamed registerTools parameter in koog-ktor to avoid Builder.build() shadowing (#1705, #1721)
Opus 4.6 token limit: Corrected maxOutputTokens from 1M to 128K for Claude Opus 4.6 (#1825)
Java AIAgentLLMWriteSession: Added Java support for AIAgentLLMWriteSession compress history functionality

LLMProvider singletons restored: Restored LLMProvider singletons and fixed reified type inference (potentially breaking for custom provider implementations) (#1800)

Spring AI Examples Add comprehensive examples of Koog + Spring AI integration

Java API documentation: Add Java code snippets for Agent Events documentation (#1833)
DataDog documentation: add DataDog exporter documentation (#1801)
Java API documentation: Add Java code snippets for tracing feature (#1821)
Java API documentation: Add missing Java snippets for Persistence (#1818)
Java API documentation: Add java snippets for model capabilities docs (#1815)
Java API documentation: Add java snippets for content moderation docs (#1814)
Java API documentation: Add missing Java snippets for read/write LLM sessions (#1808)
Java API documentation: Predefined strategies Java snippets (#1796)
Java API documentation: Update streaming docs with Java snippets (#1792)
Fixed broken formatting: fix code snippets to remove leaking includes (#1759)
Improve wording: Update wording in History compression and Predefined nodes and components (#1699)