Eino: v0.7.*-interrupt resume refactor

Version Overview

v0.7.0 is an important milestone release for the Eino framework. The core highlight is the architecture-level refactoring of Human in the Loop (HITL) / Interrupt-Resume capabilities, providing a more powerful and flexible interrupt-resume mechanism. It also introduces Skill middleware, ChatModel retry mechanism, multimodal tool support, and other core capabilities.

v0.7.0

Release Date: 2025-11-20

πŸ”₯ Core Changes: Interrupt-Resume Architecture Refactor (#563)

v0.7.0 performed an architecture-level refactor of the interrupt-resume mechanism, with massive code changes (+7527/-1692 lines), involving major modifications to 28 files.

New Core Modules

  • compose/resume.go: Provides type-safe resume state retrieval API
    • GetInterruptState[T]: Get the persisted state from last interrupt
    • GetResumeContext: Check if current component is the resume target
  • internal/core/interrupt.go: Interrupt signal core definitions
    • InterruptSignal: Nested interrupt signal structure support
    • InterruptState: State and layer-specific payload support
    • InterruptConfig: Interrupt configuration parameters
  • internal/core/address.go: Component address system
  • internal/core/resume.go: Core implementation of resume logic

Refactored Core Modules

  • adk/interrupt.go: ADK layer interrupt handling refactor (+238 lines)
  • compose/interrupt.go: Orchestration layer interrupt handling refactor (+256 lines)
  • adk/workflow.go: Workflow Agent supports interrupt-resume (+510 lines refactored)
  • compose/graph_run.go: Graph execution interrupt-resume support
  • compose/tool_node.go: Tool node interrupt support

New Resume Strategies

Two resume strategies are supported:

  1. Implicit “Resume All”: Single “continue” button resumes all interrupt points
  2. Explicit “Targeted Resume”: Independent resumption of specific interrupt points (recommended)

Agent Tool Interrupt Improvements

  • Use GetInterruptState instead of manual state management
  • Support CompositeInterrupt composite interrupts
  • Agent Tool correctly propagates internal interrupt signals

Other Improvements

  • ADK serialization enhancement (#557): Fixed missing type registration for gob serialization in checkpoint
  • DeepAgent optimization (#558): Automatically remove task tool when no sub-Agents
  • ChatModelAgent improvement (#552): Correctly apply compose option when no tools configured
  • Plan-Execute enhancement (#555): Correctly report error when no tool calls
  • MultiAgent fix (#548): Fixed default summary prompt not working issue

v0.7.1 - v0.7.36 Main Updates

Interrupt-Resume Continuous Enhancement

Building on v0.7.0’s architecture refactor, subsequent versions continue to improve interrupt-resume capabilities:

Tool Interrupt API (#691)

  • New tool interrupt API: Support triggering interrupts during tool execution
  • Extended isResumeTarget: Support descendant target identification

Nested Agent Interrupt Resume (#647, #672)

  • Nested preset/workflow Agents: Support interrupt-resume for arbitrary level Agent wrappers
  • Wrapped FlowAgents: Correctly handle deterministic transfer skip

Checkpoint Enhancement

  • Node input persistence (#634): Persist rerun node inputs in checkpoint
  • Graph resume improvement (#695): Correctly enable ProcessState in OnStart during resume
  • Serialization fixes (#608, #606): Fixed array/slice deserialization panic

Tool Error Handling (#583)

  • Tool error handler no longer wraps interrupt error

Major New Features

Skill Middleware (#661)

  • Encapsulate reusable capabilities as Skills
  • Extend Agent capabilities through middleware
  • Optimized Skill prompts (#724)

ChatModel Retry Mechanism (#635)

  • ChatModelAgent supports automatic retry on call failure
  • Configurable ModelRetryConfig (#648)
  • Added WillRetryError for error chain checking (#707)

Multimodal Tool Support (#760)

  • compose module enhanced tool interface
  • Support multimodal input and output

Nested Graph State Access (#584)

  • Nested Graph can access parent Graph state

Feature Enhancements

  • Execute Backend & Tool (#682)
  • OutputKey configuration (#711): Store final answer to SessionValues
  • Nested Runner shared session (#645)
  • Agent event emission (#620, #791)
  • ToJSONSchema deterministic output (#630)
  • Token usage details (#629)

Bug Fixes

  • AfterChatModel returns modified message (#717, #792)
  • Loop Agent BreakLoopAction interrupt (#814)
  • Sub-Agent error terminates loop Agent (#813)
  • Streaming execution command no output error (#790)
  • DeepAgent auto instruction rendering (#726)
  • Graph duplicate skip reporting (#694)
  • Graph unique successors (#693)

Documentation & Engineering

  • Rewrote README focusing on ADK (#748, #686, #719)
  • Enabled golangci-lint (#602)
  • Added code style guide (#673)

Last modified March 2, 2026: feat: sync eino docs (#1512) (96139d41)