Eino: v0.5.*-ADK implementation

Version Overview

v0.5.0 is an important milestone release that introduces the ADK (Agent Development Kit) framework. ADK provides a complete set of intelligent agent development tools, supporting Agent orchestration, preset Agents, session management, interrupt and resume, and other core capabilities.

v0.5.0

Release Date: 2025-09-10

Major New Features

ADK Framework (#262)

ADK is a complete solution for intelligent agent development, mainly including:

• ChatModelAgent: Basic intelligent agent implementation based on large language models
  • Support MaxIterations configuration
  • Support tool calling
  • Streaming output support
• Agent as Tool: Support wrapping Agent as a tool for other Agents to call
• Preset Multi-Agent Patterns:
  • Supervisor: Supervisor pattern, where a main Agent coordinates multiple sub-Agents
  • Sequential: Sequential execution pattern, Agents execute in order and inherit context
  • Plan-Execute-Replan: Plan-Execute-Replan pattern
• Session Management:
  • Session event storage and management
  • Session Values support
  • History Rewriter capability
• Interrupt and Resume:
  • Support Agent execution interrupt
  • Support resume execution from checkpoint
  • Deterministic Transfer interrupt resume support
• Agent Run Options:
  • WithSessionValues supports passing session-level variables
  • Agent CallOption extension

v0.5.1 - v0.5.15 Main Updates

Feature Enhancements

• DeepAgent preset implementation (#540): Support deep Agent pattern
• Agent middleware support (#533): Allow extending Agent behavior through middleware
• Global callback support (#512): Built-in Agent supports global Callbacks
• MessageRewriter configuration (#496): React Agent supports message rewriting
• BreakLoopAction definition (#492): Support loop Agent interruption
• Cancel interrupt support (#425): Support canceling ongoing interrupt operations
• Multimodal support:
  • Message added multimodal output content (#459)
  • Default prompt template supports multimodal (#470)
  • Format function supports UserInputMultiContent (#516)

Bug Fixes

• Fixed ChatModelAgent max step calculation (#549)
• Fixed Session only storing events with output (#503)
• Fixed Sequential Agent exit on error issue (#484)
• Fixed Workflow only executing action on last event (#463)
• Fixed ChatModelAgent return directly tool panic (#464)
• Fixed Go 1.25 compilation error (#457)
• Fixed empty slice and empty field serialization issues (#473)