Sourced from ai.koog:koog-agents's releases.

0.6.4

Major Features

• LLM Client Router: Added support for routing requests across multiple LLM clients with pluggable load balancing strategies. Includes a built-in round-robin router and fallback handling when a provider is unavailable (#1503)

Improvements

• Anthropic models list: Implemented models() for the Anthropic LLM client, consistent with other supported providers (KG-527, #1460)
• Dependency updates: Updated io.lettuce:lettuce-core from 6.5.5.RELEASE to 7.2.1.RELEASE (#1304)

Breaking Changes

• OllamaModels relocation: OllamaModels and OllamaEmbeddingModels moved from prompt-llm to prompt-executor-ollama-client module (KG-121, #1470)

0.6.3

Improvements

• Streaming reasoning support: Models with reasoning capabilities (like Claude Sonnet 4.5 or GPT-o1) now stream their reasoning process in real-time, allowing you to see how the model thinks through problems as it generates responses (KG-592, #1264)
• LLModel API enhancement: LLM clients now return List<LLModel> instead of List<String> for improved type safety and direct access to model metadata (#1452)
• Multiple event handlers per feature: Features can register multiple handlers for the same event type, enabling more flexible event processing (KG-678, #1446)
• Dependency updates: Updated Kotlin libraries (KG-544, #1475):
  • Kotlin from 2.2.21 to 2.3.10
  • kotlinx-serialization from 1.8.1 to 1.10.0
  • kotlinx-datetime from 0.6.2 to 0.7.1

Bug Fixes

• OpenRouter streaming: Fixed parsing errors when receiving reasoning content from models with reasoning capabilities by adding missing reasoning and reasoningDetails fields to the streaming response (#854)
• ReadFileTool: Fixed incorrect binary file detection for empty files (KG-533, #1340)
• DevstralMedium model: Added missing LLMCapability.Document capability (#1482)
• Ktor integration: Fixed custom timeout values being ignored when configuring LLM providers in application.yaml (KTOR-8881, #807)

Breaking Changes

• Streaming API redesign: Restructured StreamFrame types to distinguish between delta frames (incremental content like TextDelta, ReasoningDelta) and complete frames (full content like TextComplete, ReasoningComplete). Added End frame type to signal stream completion (#1264)
• Kotlin version update: Migrated from Kotlin 2.2.21 to 2.3.10; replaced kotlinx.datetime.Clock/Instant with kotlin.time.Clock/Instant (#1475)
• LLModel API changes: LLMClient.models() now returns List<LLModel> instead of List<String>; LLModel.capabilities and LLModel.contextLength are now nullable (#1452)

Documentation

• Updated documentation for the singleRunStrategy API and AIAgentService class.

Refactoring

• Module restructuring: Moved file-system abstractions (GlobPattern, FileSize, FileSystemEntry, FileSystemEntryBuilders) from agents-ext to rag-base module to reduce transitive dependencies (#1278)

Examples

• Added the ACP (Agent Communication Protocol) agent example project (#1438)

0.6.2

Published 10 February 2026

Improvements

• Structured output with examples: Include examples in the prompt with StructuredRequest.Native to help LLMs better understand desired data format (#1328, #1396)

Bug fixes

• Kotlin/Wasm support: Applied workaround for Kotlin/Wasm compiler bug which produced invalid Wasm files (KT-83728, #1365)

... (truncated)

Sourced from ai.koog:koog-agents's changelog.

0.6.4

Published 4 March 2026

Major Features

• LLM Client Router: Added support for routing requests across multiple LLM clients with pluggable load balancing strategies. Includes a built-in round-robin router and fallback handling when a provider is unavailable (#1503)

Improvements

• Anthropic models list: Implemented models() for the Anthropic LLM client, consistent with other supported providers (KG-527, #1460)
• Dependency updates: Updated io.lettuce:lettuce-core from 6.5.5.RELEASE to 7.2.1.RELEASE (#1304)

Breaking Changes

• OllamaModels relocation: OllamaModels and OllamaEmbeddingModels moved from prompt-llm to prompt-executor-ollama-client module (KG-121, #1470)

0.6.3

Published 24 February 2026

Improvements

• Streaming reasoning support: Models with reasoning capabilities (like Claude Sonnet 4.5 or GPT-o1) now stream their reasoning process in real-time, allowing you to see how the model thinks through problems as it generates responses (KG-592, #1264)
• LLModel API enhancement: LLM clients now return List<LLModel> instead of List<String> for improved type safety and direct access to model metadata (#1452)
• Multiple event handlers per feature: Features can register multiple handlers for the same event type, enabling more flexible event processing (KG-678, #1446)
• Dependency updates: Updated Kotlin libraries (KG-544, #1475):
  • Kotlin from 2.2.21 to 2.3.10
  • kotlinx-serialization from 1.8.1 to 1.10.0
  • kotlinx-datetime from 0.6.2 to 0.7.1

Bug Fixes

• OpenRouter streaming: Fixed parsing errors when receiving reasoning content from models with reasoning capabilities by adding missing reasoning and reasoningDetails fields to the streaming response (#854)
• ReadFileTool: Fixed incorrect binary file detection for empty files (KG-533, #1340)
• DevstralMedium model: Added missing LLMCapability.Document capability (#1482)
• Ktor integration: Fixed custom timeout values being ignored when configuring LLM providers in application.yaml (KTOR-8881, #807)

Breaking Changes

• Streaming API redesign: Restructured StreamFrame types to distinguish between delta frames (incremental content like TextDelta, ReasoningDelta) and complete frames (full content like TextComplete, ReasoningComplete). Added End frame type to signal stream completion (#1264)
• Kotlin version update: Migrated from Kotlin 2.2.21 to 2.3.10; replaced kotlinx.datetime.Clock/Instant with kotlin.time.Clock/Instant (#1475)
• LLModel API changes: LLMClient.models() now returns List<LLModel> instead of List<String>; LLModel.capabilities and LLModel.contextLength are now nullable (#1452)

Documentation

• Updated documentation for the singleRunStrategy API and AIAgentService class.

Refactoring

• Module restructuring: Moved file-system abstractions (GlobPattern, FileSize, FileSystemEntry, FileSystemEntryBuilders) from agents-ext to rag-base module to reduce transitive dependencies (#1278)

Examples

• Added the ACP (Agent Communication Protocol) agent example project (#1438)

0.6.2

Published 10 February 2026

Improvements

• Structured output with examples: Include examples in the prompt with StructuredRequest.Native to help LLMs better understand desired data format (#1328, #1396)

... (truncated)

• 3195d43 docs: changelog and version bump for 0.6.4
• 2dfb385 docs: aligned imports with 0.6.4 Ollama model paths
• bde1a1c fix knit
• c99021e docs: small doc improvements (#1554)
• dd2e719 docs: add custom feature creation documentation (#1295)
• 3c67dba fix knit
• cf16ef8 v0.6.3 in docs
• 7118466 docs: rework the ACP page (#1553)
• 40dca08 docs: enable links validation relative to docs root (#1558)
• 1a58899 docs: Rework Getting started and agent types tutorials (#1349)
• Additional commits viewable in compare view

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