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+# Eino V0.6.0 Alpha Release: Human-in-the-Loop
+
+## Introduction
+
+We're releasing the Alpha version of Eino V0.6.0 with Human-in-the-Loop capabilities—a new feature that enables AI agents to collaborate with humans in real-time.
+
+The framework lets you pause agent execution at almost any point, get human input, and continue with full state preservation. This means no lost context and no need to restart from scratch.
+
+Our approach: "Interrupt anywhere, resume directly" - simple, flexible, and designed for real-world use.
+
+## The Problem We're Solving
+
+Eino already has interrupt/checkpoint capabilities, but building effective human-in-the-loop interactions has been harder than it should be. Here's what developers currently face:
+
+### The Technical Overhead
+
+- **Information Access**: Users have to dig through complex nested structures just to see what an agent wants to do
+- **State Management**: You're stuck with global state mechanisms that don't work well for custom interactions
+- **Resume Complexity**: Passing data back to specific interrupt points requires custom Options and boilerplate code
+- **Multiple Interrupts**: When several things pause at once, it's hard to target the right one with the right data
+- **Error Prone**: You have to manually ensure components resume correctly without duplicating work
+
+### The Conceptual Gap
+
+The current system is too technical. Instead of thinking "I want human approval here," developers have to:
+- Figure out how to map human interactions to low-level interrupt mechanisms
+- Rebuild common patterns like approval or review from scratch every time
+- Handle communication between the technical system and human users
+
+**The result**: Too much time spent on interrupt plumbing, not enough on actual collaboration features.
+
+Our solution: Make human-in-the-loop interactions straightforward, with ready-to-use patterns and simple building blocks for custom needs.
+
+## Core Patterns: Four Practical Ways to Add Human Input
+
+**Important Note**: These four patterns are implemented as examples in our alpha release, but they're not yet finalized into the core framework. We're being conservative - we want to make sure they're the right approach before introducing them into eino-ext or eino itself. Your feedback during alpha testing will directly influence their final form.
+
+### 1. Approval Pattern: Simple Yes/No Decisions
+
+**When to use**: For operations that need human confirmation - like payments, database changes, or sending emails.
+
+```mermaid
+flowchart LR
+ A[Agent Executes] --> B{Tool Call}
+ B --> C[Interrupt: Request Approval]
+ C --> D{Human Decision}
+ D -- Approve --> E[Execute Tool]
+ D -- Deny --> F[Skip Operation]
+ E --> G[Continue Execution]
+ F --> G
+```
+
+**Example**: A ticket booking agent preparing to book a flight pauses and asks: "Book ticket to Paris for John Smith? [Y/N]"
+
+**Implementation**: [approval/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/1_approval/main.go)
+
+### 2. Review & Edit Pattern: Fix Before Continuing
+
+**When to use**: When an agent might get details wrong and you want to correct them before proceeding.
+
+```mermaid
+flowchart LR
+ A[Agent Generates Content] --> B[Interrupt: Show Draft]
+ B --> C{Human Review}
+ C -- Approve --> D[Use Original]
+ C -- Edit --> E[Provide Corrections]
+ E --> F[Use Edited Version]
+ D --> G[Continue Execution]
+ F --> G
+```
+
+**Example**: A ticket booking agent shows booking details "Destination: Paris, Passenger: John Smith" and the user corrects it to "Destination: London, Passenger: Jane Doe" before confirming.
+
+**Implementation**: [review-and-edit/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/2_review-and-edit/main.go)
+
+### 3. Feedback Loop Pattern: Keep Improving Until It's Right
+
+**When to use**: For content creation or tasks that benefit from multiple rounds of human feedback.
+
+```mermaid
+flowchart LR
+ A[Writer Agent] --> B[Generate Content]
+ B --> C[Interrupt: Show to Human]
+ C --> D{Human Review}
+ D -- Provide Feedback --> E[Refine Based on Feedback]
+ E --> C
+ D -- Satisfied --> F[Final Output]
+```
+
+**Example**: A poetry-writing agent generates a verse, receives feedback "make it more humorous," and continues refining until the human indicates they're satisfied.
+
+**Implementation**: [feedback-loop/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/3_feedback-loop/main.go)
+
+### 4. Follow-up Pattern: Ask Questions When Unsure
+
+**When to use**: When an agent needs more information to complete a task and should ask for clarification.
+
+```mermaid
+flowchart LR
+ A[Agent Researches] --> B{Sufficient Information?}
+ B -- No --> C[Interrupt: Ask Clarifying Question]
+ C --> D[Human Provides Answer]
+ D --> E[Continue Research]
+ E --> B
+ B -- Yes --> F[Complete Task]
+```
+
+**Example**: A trip planning agent needs to understand user preferences and asks: "What type of activities do you enjoy: adventure sports, cultural experiences, or relaxing vacations?" The agent continues this questioning cycle until it has sufficient information to create the perfect personalized itinerary.
+
+**Implementation**: [follow-up/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/4_follow-up/main.go)
+
+## Beyond the Basics: Build Your Own Patterns
+
+The four core patterns cover common needs, but the real value is that you're not limited to them. The underlying system lets you create any interaction pattern you need.
+
+### Interrupt Anywhere: Three Key Implications
+
+1. **Universal Interrupt Points**: Interrupts can happen from almost any entity - nodes, tools, graphs, sub-processes within lambdas, or agents. No component is off-limits.
+
+2. **Arbitrary Nesting Support**: The interrupting entity can be nested anywhere in the hierarchy - from simple agents to complex workflow agents, agent tools, graphs, sub-graphs, or graphs within lambda nodes.
+
+3. **Simple Interrupt API**: Interrupting is straightforward. Just call `StatefulInterrupt`, passing the 'info' you want end-users to see and the 'state' you want preserved for resumption.
+
+```go
+// Simple interrupt anywhere in your code
+func processComplexData(ctx context.Context, data Data) error {
+ if needsHumanReview(data) {
+ // Interrupt with user-facing info and internal state
+ return StatefulInterrupt(ctx,
+ "Complex data pattern detected - needs expert review",
+ &ProcessingState{Data: data, Stage: "review"})
+ }
+ return processAutomatically(data)
+}
+```
+
+### Resume Directly: Three Key Implications
+
+1. **Targeted Resume Data**: No longer need to define Options or use 'StateModifier'. Just call `TargetedResume` with a map where the key is the interrupt ID and the value is the data for that specific interrupt.
+
+2. **Automatic State Management**: The interrupting entity no longer needs to fetch state from global graph State. Everything is available in `ResumeInfo` - both state and resume data. The framework handles the plumbing.
+
+3. **Concurrent Interrupt Control**: When multiple interrupts occur simultaneously, end-users have complete control over which ones to resume and can pass different resume data accordingly.
+
+```go
+// Resume with targeted data for specific interrupt
+resumeData := map[string]any{
+ "interrupt_123": "user provided correction",
+ "interrupt_456": "user approval decision",
+}
+runner.TargetedResume(ctx, checkpointID, resumeData)
+```
+
+## Join the Alpha: Help Us Shape the Future
+
+We're releasing our human-in-the-loop framework in alpha because we need your help. This is a significant feature that requires real-world testing and feedback before we can finalize the design.
+
+### What to Expect (and What to Be Prepared For)
+
+- **Your Feedback Matters**: This is not a finished product - your insights will directly shape the final API and implementation
+- **Breaking Changes Are Inevitable**: As we gather feedback, we expect to make API changes. The more effective the alpha testing, the more likely breaking changes will occur
+- **Bugs Will Happen**: While we've thoroughly tested the core functionality, this is alpha software and there will be issues
+
+### How to Get Started
+
+1. **Explore the Examples**:
+ ```bash
+ git clone -b feat/hitl https://github.com/cloudwego/eino-examples.git
+ cd eino-examples/adk/human-in-the-loop
+ ```
+
+ Try the four core patterns in action:
+ - **Approval Pattern**: Simple Y/N approval for critical operations
+ - **Review & Edit**: In-place editing of tool arguments
+ - **Feedback Loop**: Iterative content refinement
+ - **Follow-up**: Proactive clarification requests
+
+2. **Read the Documentation** (Optional, for advanced users):
+ - [Framework Documentation](https://github.com/cloudwego/eino)
+
+3. **Build Your Own Agents**:
+
+ **Option 1: Fork and Extend** (Recommended for quick testing)
+ - Fork the [eino-examples repository](https://github.com/cloudwego/eino-examples) (make sure to fork the `feat/hitl` branch)
+ - Build your agents directly in the existing project structure
+ - Leverage the pre-configured examples and tool wrappers
+
+ **Option 2: Start from Scratch** (For advanced users building custom patterns)
+ ```bash
+ go get github.com/cloudwego/eino@v0.6.0-alpha1
+ ```
+
+ Build your own patterns using the low-level interrupt/resume mechanisms:
+ ```go
+ import "github.com/cloudwego/eino/adk"
+
+ // Example: Simple resumable agent with state preservation
+ func (my *myAgent) Resume(ctx context.Context, info *adk.ResumeInfo, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ iter, generator := adk.NewAsyncIteratorPair[*adk.AgentEvent]()
+
+ go func() {
+ defer generator.Close()
+
+ // Get the agent's state from the interrupt (guaranteed to exist since Resume is called)
+ var state *myState
+ var ok bool
+ state, ok = info.InterruptState.(*myState)
+ if !ok {
+ generator.Send(&adk.AgentEvent{Err: errors.New("agent received invalid state type on resume")})
+ return
+ }
+
+ // Check if user is specifically resuming this agent
+ if info.IsResumeTarget {
+ // Use state and resume data to continue work
+ resumeData, _ := info.ResumeData.(myResumeData)
+ finalEvent := &adk.AgentEvent{
+ Output: &adk.AgentOutput{
+ MessageOutput: &adk.MessageVariant{Message: schema.UserMessage("Work completed with data: " + resumeData.Content)},
+ },
+ }
+ generator.Send(finalEvent)
+ } else {
+ // Re-interrupt to preserve state and continue flow
+ reInterruptAction := adk.StatefulInterrupt(ctx, "Re-interrupting to continue flow", state)
+ generator.Send(&adk.AgentEvent{Action: reInterruptAction})
+ }
+ }()
+
+ return iter
+ }
+ ```
+
+3. **Join the Conversation**:
+ - **Open issues for bugs, feature requests, and feedback**:
+ - [eino/issues](https://github.com/cloudwego/eino/issues): Framework issues, API functionality, and ease of use
+ - [eino-examples/issues](https://github.com/cloudwego/eino-examples/issues): Pattern/example issues, pattern adjustments, and improvements
+ - **Share your stories and agents**:
+ - Real-world use cases and challenges
+ - Agents you've built using the framework
+
+We're grateful for your time and expertise in helping us improve Eino. Your contributions will make the framework better for everyone.
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+# Eino V0.6.0 Alpha 版本发布：Human-in-the-Loop
+
+## 解决的问题
+
+Eino 已经具备 interrupt/checkpoint 能力，但构建有效的 human-in-the-loop 交互还是有难度：
+
+### 技术层面的挑战
+
+- **信息获取困难**：用户需要查看复杂的嵌套结构才能了解具体 interrupt 点位的信息
+- **状态管理复杂**：需要依靠图的全局 State 机制
+- **恢复流程繁琐**：将数据传回特定 interrupt 点需要自定义 Options
+- **多 interrupt 处理**：当多个任务同时 interrupt 时，很难针对性地传递正确数据
+- **幂等**：需要手动处理幂等性问题，避免重复恢复执行
+
+### 概念层面的差距
+
+当前的 interrupt/checkpoint 是底层机制，并不是更场景化的 Human-in-the-Loop 功能。
+
+- 开发者需要把底层机制映射到具体的场景化功能上
+- 需要各自从头重建审批、审查等常见模式
+- 需要把自己写的 interrupt ”协议“告知 end-user
+
+## 核心模式：四种实用的用户与 agent 交互方式
+
+### 1. 审批模式：简单的同意/拒绝决策
+
+**适用场景**：需要用户确认的操作——如支付、数据库更改或发送邮件。
+
+```mermaid
+flowchart LR
+ A[agent 执行] --> B{工具调用}
+ B --> C[interrupt：请求审批]
+ C --> D{用户决策}
+ D -- 同意 --> E[执行工具]
+ D -- 拒绝 --> F[跳过操作]
+ E --> G[继续执行]
+ F --> G
+```
+
+**示例**：机票预订 agent 准备预订航班时暂停并询问："为 John Smith 预订去巴黎的机票？[Y/N]"
+
+**实现代码**：[approval/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/1_approval/main.go)
+
+### 2. 审查编辑模式：修复后再继续
+
+**适用场景**：当 agent 可能出错时，您希望在继续之前纠正细节。
+
+```mermaid
+flowchart LR
+ A[agent 生成内容] --> B[interrupt：显示草稿]
+ B --> C{用户审查}
+ C -- 同意 --> D[使用原版]
+ C -- 编辑 --> E[提供修正]
+ E --> F[使用编辑版]
+ D --> G[继续执行]
+ F --> G
+```
+
+**示例**：机票预订 agent 显示预订详情"目的地：巴黎，乘客：John Smith"和用户更正为"目的地：伦敦，乘客：Jane Doe"。
+
+**实现代码**：[review-and-edit/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/2_review-and-edit/main.go)
+
+### 3. 反馈循环模式：持续改进直到满意
+
+**适用场景**：内容创作或需要多轮用户反馈的任务。
+
+```mermaid
+flowchart LR
+ A[写作 agent] --> B[生成内容]
+ B --> C[interrupt：显示给用户]
+ C --> D{用户审查}
+ D -- 提供反馈 --> E[基于反馈优化]
+ E --> C
+ D -- 满意 --> F[最终输出]
+```
+
+**示例**：诗歌创作 agent 生成诗句，收到反馈"让它更有趣些"，然后继续优化，直到用户表示满意。
+
+**实现代码**：[feedback-loop/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/3_feedback-loop/main.go)
+
+### 4. 追问模式：不确定时主动询问
+
+**适用场景**：当 agent 需要更多信息来完成任务时，应该请求澄清。
+
+```mermaid
+flowchart LR
+ A[agent 研究] --> B{信息足够？}
+ B -- 否 --> C[interrupt：询问澄清问题]
+ C --> D[用户提供答案]
+ D --> E[继续研究]
+ E --> B
+ B -- 是 --> F[完成任务]
+```
+
+**示例**：旅行规划 agent 需要了解用户偏好并询问："您喜欢什么类型的活动：冒险运动、文化体验还是休闲度假？"agent 继续这个提问循环，直到有足够信息来创建完美的个性化行程。
+
+**实现代码**：[follow-up/main.go](https://github.com/cloudwego/eino-examples/blob/feat/hitl/adk/human-in-the-loop/4_follow-up/main.go)
+
+## 进阶功能：构建自定义模式
+
+在基本模式之外，Eino 支持”随处 interrupt，直接恢复“的能力，帮助开发者定制复杂的 human-in-the-loop 交互模式。
+
+### 随处 interrupt：三个关键特性
+
+1. **通用 interrupt 点位**：interrupt 可以发生在几乎任何实体中——节点、工具、图、lambda 中的子进程或 agent。没有组件是不可 interrupt 的。
+
+2. **任意嵌套支持**：interrupt 实体可以嵌套在层次结构中的任何位置——从简单 agent 到复杂工作流 agent、agent 工具、图、子图或 lambda 节点中的图。
+
+3. **简单 interrupt API**：例如调用 `StatefulInterrupt`，传递您希望最终用户看到的 `info` 和您希望保留用于恢复的 `state`。
+
+```go
+// 在代码中随处 interrupt
+func processComplexData(ctx context.Context, data Data) error {
+ if needsUserReview(data) {
+ // interrupt 并附带用户可见信息和内部状态
+ return StatefulInterrupt(ctx,
+ "检测到复杂数据模式——需要专家审查",
+ &ProcessingState{Data: data, Stage: "review"})
+ }
+ return processAutomatically(data)
+}
+```
+
+### 直接恢复：三个关键特性
+
+1. **针对性恢复数据**：不再需要定义 Options 或使用 `StateModifier`。只需调用 `TargetedResume`，传入 map，其中 key 是 Agent Event 中返回的 interrupt ID，value 是希望具体的 interrupt 点位拿到的恢复用数据。
+
+2. **自动状态管理**：interrupt 点位不再需要从全局图 State 获取状态。所有内容都在 `ResumeInfo` 中可用——包括状态和恢复数据。框架处理其他细节。
+
+3. **并发 interrupt 控制**：当多个 interrupt 同时发生时，最终用户可以完全控制要恢复哪些中断，并可以相应地传递不同的恢复数据。
+
+```go
+// 使用针对性数据恢复特定中断
+resumeData := map[string]any{
+ "interrupt_123": "用户提供的修正",
+ "interrupt_456": "用户审批决策",
+}
+runner.TargetedResume(ctx, checkpointID, resumeData)
+```
+
+### 用底层 interrupt/resume 机制搞自己的模式：
+
+```go
+import "github.com/cloudwego/eino/adk"
+
+// 示例：带状态保存的简单可恢复 agent
+ func (my *myAgent) Resume(ctx context.Context, info *adk.ResumeInfo, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ iter, generator := adk.NewAsyncIteratorPair[*adk.AgentEvent]()
+
+ go func() {
+ defer generator.Close()
+
+ // 从 interrupt 获取 agent 的状态（由于 Resume 被调用，状态保证存在）
+ var state *myState
+ var ok bool
+ state, ok = info.InterruptState.(*myState)
+ if !ok {
+ generator.Send(&adk.AgentEvent{Err: errors.New("agent 在恢复时收到无效状态类型")})
+ return
+ }
+
+ // 检查用户是否专门恢复这个 agent
+ if info.IsResumeTarget {
+ // 使用状态和恢复数据继续工作
+ resumeData, _ := info.ResumeData.(myResumeData)
+ finalEvent := &adk.AgentEvent{
+ Output: &adk.AgentOutput{
+ MessageOutput: &adk.MessageVariant{Message: schema.UserMessage("工作完成，数据：" + resumeData.Content)},
+ },
+ }
+ generator.Send(finalEvent)
+ } else {
+ // 重新 interrupt 以保存状态并继续流程
+ reInterruptAction := adk.StatefulInterrupt(ctx, "重新 interrupt 以继续流程", state)
+ generator.Send(&adk.AgentEvent{Action: reInterruptAction})
+ }
+ }()
+
+ return iter
+ }
+```
+
+## 加入 Alpha 测试：帮助我们改进
+
+### 写在前面
+
+- **您的反馈很重要**：会驱动我们改进设计。
+- **可能会有大改动**：随着收集反馈，API 可能会变。测试越有效，改动的可能性就越大
+- **肯定会有 Bug**：虽然我们测了很多遍，但毕竟是 Alpha 版本，问题肯定少不了
+
+### 快速开始
+
+1. **先试试示例**：
+ ```bash
+ git clone -b feat/hitl https://github.com/cloudwego/eino-examples.git
+ cd eino-examples/adk/human-in-the-loop
+ ```
+
+2. **看看技术文档**（可选）
+ - [框架文档](https://github.com/cloudwego/eino)
+
+3. **自己动手**：
+
+ **选项 1：fork 然后改**（适合快速实验）
+ - fork [eino-examples 仓库](https://github.com/cloudwego/eino-examples)（记得 fork `feat/hitl` 分支）
+
+ **选项 2：从头开始**（适合想搞自定义模式的老手）
+ ```bash
+ go get github.com/cloudwego/eino@v0.6.0-alpha1
+ ```
+
+4. **反馈与分享**：
+ - **提问题和需求**：
+ - [eino/issues](https://github.com/cloudwego/eino/issues)：框架问题、API 好不好用
+ - [eino-examples/issues](https://github.com/cloudwego/eino-examples/issues)：模式/示例问题、怎么改进
+ - **分享**：实际使用场景和有趣的 agent
+
+衷心感谢每个使用此 alpha 版本的用户，您的每一个反馈都会让 Eino 变得更好用。
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diff --git a/TECHNICAL_DOCUMENTATION.md b/TECHNICAL_DOCUMENTATION.md
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+# Eino Human-in-the-Loop Framework: Technical Architecture Guide
+
+## Overview
+
+This document provides technical details about Eino's Human-in-the-Loop (HITL) framework architecture, focusing on the interrupt/resume mechanism and the underlying addressing system.
+
+## Alpha Release Notice
+
+> **Note**: The Human-in-the-Loop framework described in this document is an **alpha feature**.
+
+- **Release Tag**: `v0.6.0-alpha1`
+- **Stability**: APIs and functionality may change before the official release.
+- **Alpha Period**: The alpha phase is expected to conclude before the end of November 2025.
+
+We welcome feedback and contributions during this phase to help us improve the framework.
+
+## Human-in-the-Loop Requirements
+
+The following diagram illustrates the key questions each component must answer during the interrupt/resume process. Understanding these requirements is key to grasping why the architecture is structured as it is.
+
+```mermaid
+graph TD
+ subgraph P1 [interrupt phase]
+ direction LR
+ subgraph Dev1 [Developer]
+ direction TB
+ D1[Should I interrupt now?
Was I interrupted before?]
+ D2[What info should user see
about this interruption?]
+ D3[What state should I preserve
for later resumption?]
+ D1 --> D2 --> D3
+ end
+
+ subgraph Fw1 [Framework]
+ direction TB
+ F1[Where in execution hierarchy
did interrupt occur?]
+ F2[How to associate state
with interrupt location?]
+ F3[How to persist interrupt
context and state?]
+ F4[What info does user need
to understand interrupt?]
+ F1 --> F2 --> F3 --> F4
+ end
+
+ Dev1 --> Fw1
+ end
+
+ subgraph P2 [user decision phase]
+ direction TB
+ subgraph "End-User"
+ direction TB
+ U1[Where in the process
did interrupt happen?]
+ U2[What type of information
did developer provide?]
+ U3[Should I resume this
interruption or not?]
+ U4[Should I provide data
for resuming?]
+ U5[What type of resume data
should I provide?]
+ U1 --> U2 --> U3 --> U4 --> U5
+ end
+ end
+
+
+ subgraph P3 [resume phase]
+ direction LR
+ subgraph Fw2 [Framework]
+ direction TB
+ FR1[Which entity was interrupting
and how to rerun it?]
+ FR2[How to restore context
for interrupted entity?]
+ FR3[How to route user data
to interrupting entity?]
+ FR1 --> FR2 --> FR3
+ end
+
+ subgraph Dev2 [Developer]
+ direction TB
+ DR1[Am I the explicit
resumption target?]
+ DR2[If not target, should I
re-interrupt to continue?]
+ DR3[What state did I preserve
when interrupting?]
+ DR4[How to process user's
resume data if provided?]
+ DR1 --> DR2 --> DR3 --> DR4
+ end
+
+ Fw2 --> Dev2
+ end
+
+ P1 --> P2 --> P3
+
+ classDef dev fill:#e1f5fe
+ classDef fw fill:#f3e5f5
+ classDef user fill:#e8f5e8
+
+ class D1,D2,D3,DR1,DR2,DR3,DR4 dev
+ class F1,F2,F3,F4,FR1,FR2,FR3 fw
+ class U1,U2,U3,U4,U5 user
+```
+
+So our goals are:
+1. Help developer answer the above questions as easy as possible.
+2. Help end-user answer the above questions as easy as possible.
+3. Enable the framework to answer the above questions automatically and out of the box.
+
+## Architectural Overview
+
+The following flowchart illustrates the high-level interrupt/resume flow:
+
+```mermaid
+flowchart TD
+ U[End-User]
+
+ subgraph R [Runner]
+ Run
+ Resume
+ end
+
+ U -->|initial input| Run
+ U -->|resume data| Resume
+
+ subgraph E [(arbitrarily nested) Entity]
+ Agent
+ Tool
+ ...
+ end
+
+ subgraph C [Run Context]
+ Address
+ InterruptState
+ ResumeData
+ end
+
+ Run -->|any number of transfers/calls| E
+ R <-->|stores/restores| C
+ Resume -->|replay transfers/calls| E
+ C -->|automatically assigns to| E
+```
+
+The following sequence diagram shows the chronological flow of interactions between the three main actors:
+
+```mermaid
+sequenceDiagram
+ participant D as Developer
+ participant F as Framework
+ participant U as End-User
+
+
+ Note over D,F: 1. Interrupt Phase
+ D->>F: call StatefulInterrupt()
Specifies info & state
+ F->>F: Persist InterruptID->{address, state}
+
+
+ Note over F,U: 2. User Decision Phase
+ F->>U: Emit InterruptID->{address, info}
+ U->>U: Decide on InterruptID->{resume data}
+ U->>F: call TargetedResume()
Provides InterruptID->{resume data}
+
+
+ Note over D,F: 3. Resume Phase
+ F->>F: Route to interrupting entity
+ F->>D: Provide state & resume data
+ D->>D: Handle resumption
+```
+
+
+## ADK Package APIs
+
+The ADK package provides high-level abstractions for building interruptible agents with human-in-the-loop capabilities.
+
+### 1. APIs for Interruption
+
+#### `Interrupt`
+Creates a basic interrupt action. This is used when an agent needs to pause its execution to request external input or intervention, but does not need to save any internal state to be restored upon resumption.
+
+```go
+func Interrupt(ctx context.Context, info any) *AgentEvent
+```
+
+**Parameters:**
+- `ctx`: The context of the running component.
+- `info`: User-facing data that describes the reason for the interrupt.
+
+**Returns:** `*AgentEvent` with an interrupt action.
+
+**Example:**
+```go
+// Inside an agent's Run method:
+
+// Create a simple interrupt to ask for clarification.
+return adk.Interrupt(ctx, "The user query was ambiguous. Please clarify.")
+```
+
+---
+
+#### `StatefulInterrupt`
+Creates an interrupt action that also saves the agent's internal state. This is used when an agent has internal state that must be restored for it to continue correctly.
+
+```go
+func StatefulInterrupt(ctx context.Context, info any, state any) *AgentEvent
+```
+
+**Parameters:**
+- `ctx`: The context of the running component.
+- `info`: User-facing data describing the interrupt.
+- `state`: The agent's internal state object, which will be serialized and stored.
+
+**Returns:** `*AgentEvent` with an interrupt action.
+
+**Example:**
+```go
+// Inside an agent's Run method:
+
+// Define the state to be saved.
+type MyAgentState struct {
+ ProcessedItems int
+ CurrentTopic string
+}
+
+currentState := &MyAgentState{
+ ProcessedItems: 42,
+ CurrentTopic: "HITL",
+}
+
+// Interrupt and save the current state.
+return adk.StatefulInterrupt(ctx, "Need user feedback before proceeding", currentState)
+```
+
+---
+
+#### `CompositeInterrupt`
+Creates an interrupt action for a component that orchestrates multiple sub-components. It combines the interrupts from one or more of its sub-agents into a single, cohesive interrupt. This is used by any agent that contains sub-agents (e.g., a custom Sequential or Parallel agent) to propagate interrupts from its children.
+
+```go
+func CompositeInterrupt(ctx context.Context, info any, state any,
+ subInterruptSignals ...*InterruptSignal) *AgentEvent
+```
+
+**Parameters:**
+- `ctx`: The context of the running component.
+- `info`: User-facing data describing the orchestrator's own reason for interrupting.
+- `state`: The orchestrator agent's own state (e.g., the index of the sub-agent that was interrupted).
+- `subInterruptSignals`: A variadic list of the `InterruptSignal` objects from the interrupted sub-agents.
+
+**Returns:** `*AgentEvent` with an interrupt action.
+
+**Example:**
+```go
+// In a custom sequential agent that runs two sub-agents...
+subAgent1 := &myInterruptingAgent{}
+subAgent2 := &myOtherAgent{}
+
+// If subAgent1 returns an interrupt event...
+subInterruptEvent := subAgent1.Run(ctx, input)
+
+// The parent agent must catch it and wrap it in a CompositeInterrupt.
+if subInterruptEvent.Action.Interrupted != nil {
+ // The parent can add its own state, like which child was interrupted.
+ parentState := map[string]int{"interrupted_child_index": 0}
+
+ // Propagate the interrupt up.
+ return adk.CompositeInterrupt(ctx,
+ "A sub-agent needs attention",
+ parentState,
+ subInterruptEvent.Action.Interrupted.internalInterrupted,
+ )
+}
+```
+
+### 2. APIs for Fetching Interrupt Information
+
+#### `InterruptInfo` and `InterruptCtx`
+When an agent execution is interrupted, the `AgentEvent` contains structured interrupt information. The `InterruptInfo` struct contains a list of `InterruptCtx` objects, each representing a single point of interruption in the hierarchy.
+
+An `InterruptCtx` provides a complete, user-facing context for a single, resumable interrupt point.
+
+```go
+type InterruptCtx struct {
+ // ID is the unique, fully-qualified address of the interrupt point, used for targeted resumption.
+ // e.g., "agent:A;node:graph_a;tool:tool_call_123"
+ ID string
+
+ // Address is the structured sequence of AddressSegment segments that leads to the interrupt point.
+ Address Address
+
+ // Info is the user-facing information associated with the interrupt, provided by the component that triggered it.
+ Info any
+
+ // IsRootCause indicates whether the interrupt point is the exact root cause for an interruption.
+ IsRootCause bool
+
+ // Parent points to the context of the parent component in the interrupt chain (nil for the top-level interrupt).
+ Parent *InterruptCtx
+}
+```
+
+The following example shows how to access this information:
+
+```go
+// In the application layer, after an interrupt:
+if event.Action != nil && event.Action.Interrupted != nil {
+ interruptInfo := event.Action.Interrupted
+
+ // Get a flat list of all interrupt points
+ interruptPoints := interruptInfo.InterruptContexts
+
+ for _, point := range interruptPoints {
+ // Each point contains a unique ID, user-facing info, and its hierarchical address
+ fmt.Printf("Interrupt ID: %s, Address: %s, Info: %v\n", point.ID, point.Address.String(), point.Info)
+ }
+}
+```
+
+### 3. APIs for End-User Resumption
+
+#### `(*Runner).TargetedResume`
+Continues an interrupted execution from a checkpoint, using an "Explicit Targeted Resume" strategy. This is the most common and powerful way to resume, allowing you to target specific interrupt points and provide them with data.
+
+When using this method:
+- Components whose addresses are in the `targets` map will be the explicit target.
+- Interrupted components whose addresses are NOT in the `targets` map must re-interrupt themselves to preserve their state.
+
+```go
+func (r *Runner) TargetedResume(ctx context.Context, checkPointID string,
+ targets map[string]any, opts ...AgentRunOption) (*AsyncIterator[*AgentEvent], error)
+```
+
+**Parameters:**
+- `ctx`: Context for resumption.
+- `checkPointID`: Identifier for the checkpoint to resume from.
+- `targets`: Map of interrupt IDs to resume data. These IDs can point to any interruptible component in the entire execution graph.
+- `opts`: Additional run options.
+
+**Returns:** An async iterator for agent events.
+
+**Example:**
+```go
+// After receiving an interrupt event...
+interruptID := interruptEvent.Action.Interrupted.InterruptContexts[0].ID
+
+// Prepare the data for the specific interrupt point.
+resumeData := map[string]any{
+ interruptID: "Here is the clarification you requested.",
+}
+
+// Resume the execution with the targeted data.
+resumeIterator, err := runner.TargetedResume(ctx, "my-checkpoint-id", resumeData)
+if err != nil {
+ // Handle error
+}
+
+// Process events from the resume iterator
+for event := range resumeIterator.Events() {
+ if event.Err != nil {
+ // Handle event error
+ break
+ }
+ // Process the agent event
+ fmt.Printf("Event: %+v\n", event)
+}
+```
+
+### 4. APIs for Developer Resumption
+
+#### `ResumeInfo` Struct
+`ResumeInfo` holds all the information necessary to resume an interrupted agent execution. It is created by the framework and passed to an agent's `Resume` method.
+
+```go
+type ResumeInfo struct {
+ // WasInterrupted indicates if this agent was a direct source of interrupt.
+ WasInterrupted bool
+
+ // InterruptState holds the state saved with StatefulInterrupt or CompositeInterrupt.
+ InterruptState any
+
+ // IsResumeTarget indicates if this agent was the specific target of TargetedResume.
+ IsResumeTarget bool
+
+ // ResumeData holds the data provided by the user for this agent.
+ ResumeData any
+
+ // ... other fields
+}
+```
+
+**Example:**
+```go
+import (
+ "context"
+ "errors"
+ "fmt"
+
+ "github.com/cloudwego/eino/adk"
+)
+
+// Inside an agent's Resume method:
+func (a *myAgent) Resume(ctx context.Context, info *adk.ResumeInfo, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ if !info.WasInterrupted {
+ // Should not happen in a resume flow.
+ return adk.NewAsyncIterator([]*adk.AgentEvent{{Err: errors.New("not an interrupt")}}, nil)
+ }
+
+ if !info.IsResumeTarget {
+ // This agent was not the specific target, so it must re-interrupt to preserve its state.
+ return adk.StatefulInterrupt(ctx, "Waiting for another part of the workflow to be resumed", info.InterruptState)
+ }
+
+ // This agent IS the target. Process the resume data.
+ if info.ResumeData != nil {
+ userInput, ok := info.ResumeData.(string)
+ if ok {
+ // Process the user input and continue execution
+ fmt.Printf("Received user input: %s\n", userInput)
+ // Update agent state based on user input
+ a.currentState.LastUserInput = userInput
+ }
+ }
+
+ // Continue with normal execution logic
+ return a.Run(ctx, &adk.AgentInput{Input: "resumed execution"})
+}
+```
+
+## Compose Package APIs
+
+The compose package provides lower-level building blocks for creating complex, interruptible workflows.
+
+### 1. APIs for Interruption
+
+#### `Interrupt`
+Creates a special error that signals the execution engine to interrupt the current run at the component's specific address and save a checkpoint. This is the standard way for a single, non-composite component to signal a resumable interruption.
+
+```go
+func Interrupt(ctx context.Context, info any) error
+```
+
+**Parameters:**
+- `ctx`: The context of the running component, used to retrieve the current execution address.
+- `info`: User-facing information about the interrupt. This is not persisted but is exposed to the calling application via the `InterruptCtx`.
+
+---
+
+#### `StatefulInterrupt`
+Like `Interrupt`, but also saves the component's internal state. The state is saved in the checkpoint and will be provided back to the component upon resumption via `GetInterruptState`.
+
+```go
+func StatefulInterrupt(ctx context.Context, info any, state any) error
+```
+
+**Parameters:**
+- `ctx`: The context of the running component.
+- `info`: User-facing information about the interrupt.
+- `state`: The internal state that the interrupting component needs to persist.
+
+---
+
+#### `CompositeInterrupt`
+Creates a special error that signals a composite interruption. It is designed for "composite" nodes (like `ToolsNode`) or any component that orchestrates multiple, independent, interruptible sub-processes. It bundles multiple sub-interrupt errors into a single error that the engine can deconstruct into a flat list of resumable points.
+
+```go
+func CompositeInterrupt(ctx context.Context, info any, state any, errs ...error) error
+```
+
+**Parameters:**
+- `ctx`: The context of the running composite node.
+- `info`: User-facing information for the composite node itself (can be `nil`).
+- `state`: The state for the composite node itself (can be `nil`).
+- `errs`: A list of errors from sub-processes. These can be `Interrupt`, `StatefulInterrupt`, or nested `CompositeInterrupt` errors.
+
+**Example:**
+```go
+// A node that runs multiple processes in parallel.
+var errs []error
+for _, process := range processes {
+ subCtx := compose.AppendAddressSegment(ctx, "process", process.ID)
+ _, err := process.Run(subCtx)
+ if err != nil {
+ errs = append(errs, err)
+ }
+}
+
+// If any of the sub-processes interrupted, bundle them up.
+if len(errs) > 0 {
+ // The composite node can save its own state, e.g., which processes have already completed.
+ return compose.CompositeInterrupt(ctx, "Parallel execution requires input", parentState, errs...)
+}
+```
+
+### 2. APIs for Fetching Interrupt Information
+
+#### `ExtractInterruptInfo`
+Extracts a structured `InterruptInfo` object from an error returned by a `Runnable`'s `Invoke` or `Stream` method. This is the primary way for an application to get a list of all interrupt points after an execution pauses.
+
+```go
+composeInfo, ok := compose.ExtractInterruptInfo(err)
+if ok {
+ // Access interrupt contexts
+ interruptContexts := composeInfo.InterruptContexts
+}
+```
+
+**Example:**
+```go
+// After invoking a graph that interrupts...
+_, err := graph.Invoke(ctx, "initial input")
+
+if err != nil {
+ interruptInfo, isInterrupt := compose.ExtractInterruptInfo(err)
+ if isInterrupt {
+ fmt.Printf("Execution interrupted with %d interrupt points.\n", len(interruptInfo.InterruptContexts))
+ // Now you can inspect interruptInfo.InterruptContexts to decide how to resume.
+ }
+}
+```
+
+### 3. APIs for End-User Resumption
+
+#### `Resume`
+Prepares a context for an "Explicit Targeted Resume" operation by targeting one or more components without providing data. This is useful when the act of resuming is itself the signal.
+
+```go
+func Resume(ctx context.Context, interruptIDs ...string) context.Context
+```
+
+**Example:**
+```go
+// After an interrupt, we get two interrupt IDs: id1 and id2.
+// We want to resume both without providing specific data.
+resumeCtx := compose.Resume(context.Background(), id1, id2)
+
+// Pass this context to the next Invoke/Stream call.
+// In the components corresponding to id1 and id2, GetResumeContext will return isResumeFlow = true.
+```
+
+---
+
+#### `ResumeWithData`
+Prepares a context to resume a single, specific component with data. It is a convenience wrapper around `BatchResumeWithData`.
+
+```go
+func ResumeWithData(ctx context.Context, interruptID string, data any) context.Context
+```
+
+**Example:**
+```go
+// Resume a single interrupt point with a specific piece of data.
+resumeCtx := compose.ResumeWithData(context.Background(), interruptID, "Here is the specific data you asked for.")
+
+// Pass this context to the next Invoke/Stream call.
+```
+
+---
+
+#### `BatchResumeWithData`
+This is the core function for preparing a resume context. It injects a map of resume targets (interrupt IDs) and their corresponding data into the context. Components whose interrupt IDs are present as keys in the map will receive `isResumeFlow = true` when they call `GetResumeContext`.
+
+```go
+func BatchResumeWithData(ctx context.Context, resumeData map[string]any) context.Context
+```
+
+**Example:**
+```go
+// Resume multiple interrupt points at once, each with different data.
+resumeData := map[string]any{
+ "interrupt-id-1": "Data for the first point.",
+ "interrupt-id-2": 42, // Data can be of any type.
+ "interrupt-id-3": nil, // Equivalent to using Resume() for this ID.
+}
+
+resumeCtx := compose.BatchResumeWithData(context.Background(), resumeData)
+
+// Pass this context to the next Invoke/Stream call.
+```
+
+### 4. APIs for Developer Resumption
+
+#### `GetInterruptState`
+Provides a type-safe way to check for and retrieve the persisted state from a previous interruption. It is the primary function a component should use to understand its past state.
+
+```go
+func GetInterruptState[T any](ctx context.Context) (wasInterrupted bool, hasState bool, state T)
+```
+
+**Return Values:**
+- `wasInterrupted`: `true` if the node was part of a previous interruption.
+- `hasState`: `true` if state was provided and successfully cast to type `T`.
+- `state`: The typed state object.
+
+**Example:**
+```go
+// Inside a lambda or tool's execution logic:
+wasInterrupted, hasState, state := compose.GetInterruptState[*MyState](ctx)
+
+if wasInterrupted {
+ fmt.Println("This component was interrupted in a previous run.")
+ if hasState {
+ fmt.Printf("Restored state: %+v\n", state)
+ }
+} else {
+ // This is the first time this component is running in this execution.
+}
+```
+
+---
+
+#### `GetResumeContext`
+Checks if the current component is the target of a resume operation and retrieves any data provided by the user. This is typically called after `GetInterruptState` confirms the component was interrupted.
+
+```go
+func GetResumeContext[T any](ctx context.Context) (isResumeFlow bool, hasData bool, data T)
+```
+
+**Return Values:**
+- `isResumeFlow`: `true` if the component was explicitly targeted by a resume call. If `false`, the component MUST re-interrupt to preserve its state.
+- `hasData`: `true` if data was provided for this component.
+- `data`: The typed data provided by the user.
+
+**Example:**
+```go
+// Inside a lambda or tool's execution logic, after checking GetInterruptState:
+wasInterrupted, _, oldState := compose.GetInterruptState[*MyState](ctx)
+
+if wasInterrupted {
+ isTarget, hasData, resumeData := compose.GetResumeContext[string](ctx)
+ if isTarget {
+ // This component is the target, proceed with logic.
+ if hasData {
+ fmt.Printf("Resuming with user data: %s\n", resumeData)
+ }
+ // Complete the work using the restored state and resume data
+ result := processWithStateAndData(state, resumeData)
+ return result, nil
+ } else {
+ // This component is NOT the target, so it must re-interrupt.
+ return compose.StatefulInterrupt(ctx, "Waiting for another component to be resumed", oldState)
+ }
+}
+```
+
+## Underlying Architecture: The Address System
+
+### The Need for Addresses
+
+The address system was designed to solve three fundamental requirements for effective human-in-the-loop interactions:
+
+1. **State Attachment**: To attach local state to interrupt points, we need a stable, unique locator for each interrupt point
+2. **Targeted Resumption**: To provide targeted resume data for specific interrupt points, we need a way to precisely identify each point
+3. **Interrupt Location**: To tell end-users where exactly an interrupt occurred within the execution hierarchy
+
+### How Addresses Satisfy These Requirements
+
+The Address system satisfies these requirements through three key properties:
+
+- **Stability**: Addresses remain consistent across executions, ensuring the same interrupt point can be reliably identified
+- **Uniqueness**: Each interrupt point has a unique address, enabling precise targeting during resumption
+- **Hierarchical Structure**: Addresses provide a clear, hierarchical path that shows exactly where in the execution flow the interrupt occurred
+
+### Address Structure and Segment Types
+
+#### `Address` Structure
+```go
+type Address struct {
+ Segments []AddressSegment
+}
+
+type AddressSegment struct {
+ Type AddressSegmentType
+ ID string
+ SubID string
+}
+```
+
+#### Address Structure Diagrams
+
+The following diagrams illustrate the hierarchical structure of an Address and its AddressSegments from both the ADK and Compose layer perspectives:
+
+**ADK Layer Perspective** (Simplified, Agent-Centric View):
+```mermaid
+graph TD
+ A[Address] --> B[AddressSegment 1]
+ A --> C[AddressSegment 2]
+ A --> D[AddressSegment 3]
+
+ B --> B1[Type: Agent]
+ B --> B2[ID: A]
+
+ C --> C1[Type: Agent]
+ C --> C2[ID: B]
+
+ D --> D1[Type: Tool]
+ D --> D2[ID: search_tool]
+ D --> D3[SubID: 1]
+
+ style A fill:#e1f5fe
+ style B fill:#f3e5f5
+ style C fill:#f3e5f5
+ style D fill:#f3e5f5
+ style B1 fill:#e8f5e8
+ style B2 fill:#e8f5e8
+ style C1 fill:#e8f5e8
+ style C2 fill:#e8f5e8
+ style D1 fill:#e8f5e8
+ style D2 fill:#e8f5e8
+ style D3 fill:#e8f5e8
+```
+
+**Compose Layer Perspective** (Detailed, Full Hierarchy View):
+```mermaid
+graph TD
+ A[Address] --> B[AddressSegment 1]
+ A --> C[AddressSegment 2]
+ A --> D[AddressSegment 3]
+ A --> E[AddressSegment 4]
+
+ B --> B1[Type: Runnable]
+ B --> B2[ID: my_graph]
+
+ C --> C1[Type: Node]
+ C --> C2[ID: sub_graph]
+
+ D --> D1[Type: Node]
+ D --> D2[ID: tools_node]
+
+ E --> E1[Type: Tool]
+ E --> E2[ID: mcp_tool]
+ E --> E3[SubID: 1]
+
+ style A fill:#e1f5fe
+ style B fill:#f3e5f5
+ style C fill:#f3e5f5
+ style D fill:#f3e5f5
+ style E fill:#f3e5f5
+ style B1 fill:#e8f5e8
+ style B2 fill:#e8f5e8
+ style C1 fill:#e8f5e8
+ style C2 fill:#e8f5e8
+ style D1 fill:#e8f5e8
+ style D2 fill:#e8f5e8
+ style E1 fill:#e8f5e8
+ style E2 fill:#e8f5e8
+ style E3 fill:#e8f5e8
+```
+
+### Layer-Specific Address Segment Types
+
+#### ADK Layer Segment Types
+The ADK layer provides a simplified, agent-centric abstraction of the execution hierarchy:
+
+```go
+type AddressSegmentType = core.AddressSegmentType
+
+const (
+ AddressSegmentAgent AddressSegmentType = "agent"
+ AddressSegmentTool AddressSegmentType = "tool"
+)
+```
+
+**Key Characteristics:**
+- **Agent Segments**: Represent agent-level execution segments (SubID typically omitted)
+- **Tool Segments**: Represent tool-level execution segments (SubID used for uniqueness)
+- **Simplified View**: Abstracts away underlying complexity for agent developers
+- **Example Path**: `Agent:A → Agent:B → Tool:search_tool:1`
+
+#### Compose Layer Segment Types
+The compose layer provides fine-grained control and visibility into the entire execution hierarchy:
+
+```go
+type AddressSegmentType = core.AddressSegmentType
+
+const (
+ AddressSegmentRunnable AddressSegmentType = "runnable" // Graph, Workflow, or Chain
+ AddressSegmentNode AddressSegmentType = "node" // Individual graph nodes
+ AddressSegmentTool AddressSegmentType = "tool" // Specific tool calls
+)
+```
+
+**Key Characteristics:**
+- **Runnable Segments**: Represent top-level executables (Graphs, Workflows, Chains)
+- **Node Segments**: Represent individual nodes within execution graphs
+- **Tool Segments**: Represent specific tool calls within ToolsNodes
+- **Detailed View**: Provides complete visibility into execution hierarchy
+- **Example Path**: `Runnable:my_graph → Node:sub_graph → Node:tools_node → Tool:mcp_tool:1`
+
+### Extensibility and Design Principles
+
+The address segment type system is designed to be **extensible**. Framework developers can add new segment types to support additional execution patterns or custom components while maintaining backward compatibility.
+
+**Key Design Principle**: The ADK layer provides a simplified, agent-centric abstraction, while the compose layer handles the full complexity of the execution hierarchy. This layered approach allows developers to work at the appropriate level of abstraction for their needs.
+
+## Backward Compatibility
+
+The Human-in-the-Loop framework maintains full backward compatibility with existing code. All previous interruption and resumption patterns continue to work as before, with enhanced functionality available through the new address system.
+
+### 1. Graph Interruption Compatibility
+
+The previous flow of graph interruption using the deprecated `NewInterruptAndRerunErr` or `InterruptAndRerun` within nodes/tools continues to be supported, but requires a crucial extra step: **error wrapping**.
+
+Since these legacy functions are not address-aware, the component that calls them is responsible for catching the error and wrapping it with address information using the `WrapInterruptAndRerunIfNeeded` helper function. This is typically done inside a composite node that orchestrates legacy components.
+
+> **Note**: If you choose **not** to use `WrapInterruptAndRerunIfNeeded`, the legacy behavior is preserved. End-users can still use `ExtractInterruptInfo` to get information from the error as they did before. However, because the resulting interrupt context will lack a proper address, it will not be possible to use the new targeted resumption APIs for that specific interrupt point. Wrapping is required to fully opt-in to the new address-aware features.
+
+```go
+// 1. A legacy tool using a deprecated interrupt
+func myLegacyTool(ctx context.Context, input string) (string, error) {
+ // ... tool logic
+ // This error is NOT address-aware.
+ return "", compose.NewInterruptAndRerunErr("Need user approval")
+}
+
+// 2. A composite node that calls the legacy tool
+var legacyToolNode = compose.InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ out, err := myLegacyTool(ctx, input)
+ if err != nil {
+ // CRUCIAL: The caller must wrap the error to add an address.
+ // The segment 'tool:legacy_tool' will be appended to the current address.
+ segment := compose.AddressSegment{Type: "tool", ID: "legacy_tool"}
+ return "", compose.WrapInterruptAndRerunIfNeeded(ctx, segment, err)
+ }
+ return out, nil
+})
+
+// 3. The end-user code can now see the full address.
+_, err := graph.Invoke(ctx, input)
+if err != nil {
+ interruptInfo, exists := compose.ExtractInterruptInfo(err)
+ if exists {
+ // The interrupt context will now have a correct, fully-qualified address.
+ fmt.Printf("Interrupt Address: %s\n", interruptInfo.InterruptContexts[0].Address.String())
+ }
+}
+```
+
+**Enhancement**: By wrapping the error, `InterruptInfo` will contain a correct `[]*InterruptCtx` with fully-qualified addresses, allowing legacy components to integrate seamlessly into the new human-in-the-loop framework.
+
+### 2. Compatibility for Graphs with Compile-Time Interrupts
+
+The previous static interrupts on graphs added through `WithInterruptBeforeNodes` or `WithInterruptAfterNodes` continue to work, but the way state is handled is significantly improved.
+
+When a static interrupt is triggered, an `InterruptCtx` is generated where the address points to the graph itself. Crucially, the `InterruptCtx.Info` field now directly exposes the state of that graph.
+
+This enables a more direct and intuitive workflow:
+1. The end-user receives the `InterruptCtx` and can inspect the graph's live state via the `.Info` field.
+2. They can directly modify this state object.
+3. They can then resume execution by passing the modified state object back using `ResumeWithData` and the `InterruptCtx.ID`.
+
+This new pattern often eliminates the need for the older `WithStateModifier` option, though it remains available for full backward compatibility.
+
+```go
+// 1. Define a graph with its own local state
+type MyGraphState struct {
+ SomeValue string
+}
+
+g := compose.NewGraph[string, string](compose.WithGenLocalState(func(ctx context.Context) *MyGraphState {
+ return &MyGraphState{SomeValue: "initial"}
+}))
+// ... add nodes 1 and 2 to the graph ...
+
+// 2. Compile the graph with a static interrupt point
+// This will interrupt the graph itself after node "node_1" completes.
+graph, err := g.Compile(ctx, compose.WithInterruptAfterNodes([]string{"node_1"}))
+
+// 3. Run the graph, which triggers the static interrupt
+_, err = graph.Invoke(ctx, "start")
+
+// 4. Extract the interrupt context and the graph's state
+interruptInfo, isInterrupt := compose.ExtractInterruptInfo(err)
+if isInterrupt {
+ interruptCtx := interruptInfo.InterruptContexts[0]
+
+ // The .Info field exposes the graph's current state
+ graphState, ok := interruptCtx.Info.(*MyGraphState)
+ if ok {
+ // 5. Modify the state directly
+ fmt.Printf("Original state value: %s\n", graphState.SomeValue) // prints "initial"
+ graphState.SomeValue = "a-new-value-from-user"
+
+ // 6. Resume by passing the modified state object back
+ resumeCtx := compose.ResumeWithData(context.Background(), interruptCtx.ID, graphState)
+ result, err := graph.Invoke(resumeCtx, "start")
+ // ... execution continues, and node_2 will now see the modified state.
+ }
+}
+```
+
+### 3. Agent Interruption Compatibility
+
+Compatibility with legacy agents is maintained at the data structure level, ensuring that older agent implementations continue to function within the new framework. The key to this is how the `adk.InterruptInfo` and `adk.ResumeInfo` structs are populated.
+
+**For End-Users (Application Layer):**
+When an interrupt is received from an agent, the `adk.InterruptInfo` struct is populated with **both**:
+- The new, structured `InterruptContexts` field.
+- The legacy `Data` field, which will contain the original interrupt information (e.g., `ChatModelAgentInterruptInfo` or `WorkflowInterruptInfo`).
+
+This allows end-users to gradually migrate their application logic to use the richer `InterruptContexts` while still having access to the old `Data` field if needed.
+
+**For Agent Developers:**
+When a legacy agent's `Resume` method is called, the `adk.ResumeInfo` struct it receives still contains the now-deprecated embedded `InterruptInfo` field. This field is populated with the same legacy data structures, allowing agent developers to maintain their existing resume logic without needing to immediately update to the new address-aware APIs.
+
+```go
+// --- End-User Perspective ---
+
+// After an agent run, you receive an interrupt event.
+if event.Action != nil && event.Action.Interrupted != nil {
+ interruptInfo := event.Action.Interrupted
+
+ // 1. New Way: Access the structured interrupt contexts
+ if len(interruptInfo.InterruptContexts) > 0 {
+ fmt.Printf("New structured context available: %+v\n", interruptInfo.InterruptContexts[0])
+ }
+
+ // 2. Old Way (Still works): Access the legacy Data field
+ if chatInterrupt, ok := interruptInfo.Data.(*adk.ChatModelAgentInterruptInfo); ok {
+ fmt.Printf("Legacy ChatModelAgentInterruptInfo still accessible.\n")
+ // ... logic that uses the old struct
+ }
+}
+
+
+// --- Agent Developer Perspective ---
+
+// Inside a legacy agent's Resume method:
+func (a *myLegacyAgent) Resume(ctx context.Context, info *adk.ResumeInfo) *adk.AsyncIterator[*adk.AgentEvent] {
+ // The deprecated embedded InterruptInfo field is still populated.
+ // This allows old resume logic to continue working.
+ if info.InterruptInfo != nil {
+ if chatInterrupt, ok := info.InterruptInfo.Data.(*adk.ChatModelAgentInterruptInfo); ok {
+ // ... existing resume logic that relies on the old ChatModelAgentInterruptInfo struct
+ fmt.Println("Resuming based on legacy InterruptInfo.Data field.")
+ }
+ }
+
+ // ... continue execution
+ return a.Run(ctx, &adk.AgentInput{Input: "resumed execution"})
+}
+```
+
+### Migration Benefits
+
+- **Preservation of Legacy Behavior**: Existing code continues to function as it did before. Legacy interrupt patterns will not cause crashes, but they will also not automatically gain new address-aware capabilities without modification.
+- **Gradual Adoption**: Teams can opt-in to the new features on a case-by-case basis. For example, you can choose to wrap legacy interrupts with `WrapInterruptAndRerunIfNeeded` only for the workflows where you need targeted resume.
+- **Enhanced Functionality**: The new address system provides richer, structured context (`InterruptCtx`) for all interrupts, while the old data fields are still populated for full compatibility.
+- **Flexible State Management**: For static graph interrupts, you can choose between the modern, direct state modification via the `.Info` field or continue using the legacy `WithStateModifier` option.
+
+This backward compatibility model ensures a smooth transition for existing users while providing a clear path to adopt powerful new capabilities for human-in-the-loop interactions.
+
+## Implementation Examples
+
+For complete, working examples of human-in-the-loop patterns, refer to the [eino-examples repository](https://github.com/cloudwego/eino-examples/pull/125). The repository contains four typical patterns implemented as self-contained examples:
+
+### 1. Approval Pattern
+Simple, explicit approval before critical tool calls. Ideal for irreversible operations like database modifications or financial transactions.
+
+### 2. Review-and-Edit Pattern
+Advanced pattern allowing human review and in-place editing of tool call arguments before execution. Perfect for correcting misinterpretations.
+
+### 3. Feedback Loop Pattern
+Iterative refinement pattern where agents generate content and humans provide qualitative feedback for improvement.
+
+### 4. Follow-up Pattern
+Proactive pattern where agents recognize insufficient tool outputs and ask for clarification or next steps.
+
+These examples demonstrate practical usage of the interrupt/resume mechanisms with reusable tool wrappers and detailed documentation.
+
+This technical documentation provides the foundation for understanding and using Eino's Human-in-the-Loop capabilities effectively.
\ No newline at end of file
diff --git a/TECHNICAL_DOCUMENTATION.zh_CN.md b/TECHNICAL_DOCUMENTATION.zh_CN.md
new file mode 100644
index 00000000..b59c2766
--- /dev/null
+++ b/TECHNICAL_DOCUMENTATION.zh_CN.md
@@ -0,0 +1,954 @@
+# Eino human-in-the-loop框架：技术架构指南
+
+## 概述
+
+本文档提供 Eino 的human-in-the-loop (Human-in-the-Loop, HITL) 框架架构的技术细节，重点介绍中断/恢复机制和底层的寻址系统。
+
+## Alpha 版本发布公告
+
+> **注意**：本文档中描述的human-in-the-loop框架是一个 **Alpha 功能**。
+
+- **发布标签**：`v0.6.0-alpha1`
+- **稳定性**：在正式发布前，API 和功能可能会发生变化。
+- **Alpha 阶段**：Alpha 阶段预计将在 2025 年 11 月底前结束。
+
+我们欢迎在此阶段提供反馈和贡献，以帮助我们改进该框架。
+
+## human-in-the-loop的需求
+
+下图说明了在中断/恢复过程中，每个组件必须回答的关键问题。理解这些需求是掌握架构设计背后原因的关键。
+
+```mermaid
+graph TD
+ subgraph P1 [中断阶段]
+ direction LR
+ subgraph Dev1 [开发者]
+ direction TB
+ D1[我现在应该中断吗？
我之前被中断过吗？]
+ D2[用户应该看到关于此中断的
什么信息？]
+ D3[我应该保留什么状态
以便后续恢复？]
+ D1 --> D2 --> D3
+ end
+
+ subgraph Fw1 [框架]
+ direction TB
+ F1[中断发生在执行层级的
哪个位置？]
+ F2[如何将状态与
中断位置关联？]
+ F3[如何持久化中断
上下文和状态？]
+ F4[用户需要什么信息
来理解中断？]
+ F1 --> F2 --> F3 --> F4
+ end
+
+ Dev1 --> Fw1
+ end
+
+ subgraph P2 [用户决策阶段]
+ direction TB
+ subgraph "最终用户"
+ direction TB
+ U1[中断发生在流程的
哪个环节？]
+ U2[开发者提供了
什么类型的信息？]
+ U3[我应该恢复这个
中断吗？]
+ U4[我应该为恢复
提供数据吗？]
+ U5[我应该提供什么类型的
恢复数据？]
+ U1 --> U2 --> U3 --> U4 --> U5
+ end
+ end
+
+
+ subgraph P3 [恢复阶段]
+ direction LR
+ subgraph Fw2 [框架]
+ direction TB
+ FR1[哪个实体正在中断
以及如何重新运行它？]
+ FR2[如何为被中断的实体
恢复上下文？]
+ FR3[如何将用户数据
路由到中断实体？]
+ FR1 --> FR2 --> FR3
+ end
+
+ subgraph Dev2 [开发者]
+ direction TB
+ DR1[我是显式的
恢复目标吗？]
+ DR2[如果不是目标，我应该
重新中断以继续吗？]
+ DR3[中断时我保留了
什么状态？]
+ DR4[如果提供了用户恢复数据，
该如何处理？]
+ DR1 --> DR2 --> DR3 --> DR4
+ end
+
+ Fw2 --> Dev2
+ end
+
+ P1 --> P2 --> P3
+
+ classDef dev fill:#e1f5fe
+ classDef fw fill:#f3e5f5
+ classDef user fill:#e8f5e8
+
+ class D1,D2,D3,DR1,DR2,DR3,DR4 dev
+ class F1,F2,F3,F4,FR1,FR2,FR3 fw
+ class U1,U2,U3,U4,U5 user
+```
+
+因此，我们的目标是：
+1. 帮助开发者尽可能轻松地回答上述问题。
+2. 帮助最终用户尽可能轻松地回答上述问题。
+3. 使框架能够自动并开箱即用地回答上述问题。
+
+## 架构概述
+
+以下流程图说明了高层次的中断/恢复流程：
+
+```mermaid
+flowchart TD
+ U[最终用户]
+
+ subgraph R [Runner]
+ Run
+ Resume
+ end
+
+ U -->|初始输入| Run
+ U -->|恢复数据| Resume
+
+ subgraph E [（任意嵌套的）实体]
+ Agent
+ Tool
+ ...
+ end
+
+ subgraph C [运行上下文]
+ Address
+ InterruptState
+ ResumeData
+ end
+
+ Run -->|任意数量的 transfer / call| E
+ R <-->|存储/恢复| C
+ Resume -->|重放 transfer / call| E
+ C -->|自动分配给| E
+```
+
+以下序列图显示了三个主要参与者之间按时间顺序的交互流程：
+
+```mermaid
+sequenceDiagram
+ participant D as 开发者
+ participant F as 框架
+ participant U as 最终用户
+
+
+ Note over D,F: 1. 中断阶段
+ D->>F: 调用 StatefulInterrupt()
指定信息和状态
+ F->>F: 持久化 InterruptID->{address, state}
+
+
+ Note over F,U: 2. 用户决策阶段
+ F->>U: 抛出 InterruptID->{address, info}
+ U->>U: 决定 InterruptID->{resume data}
+ U->>F: 调用 TargetedResume()
提供 InterruptID->{resume data}
+
+
+ Note over D,F: 3. 恢复阶段
+ F->>F: 路由到中断实体
+ F->>D: 提供状态和恢复数据
+ D->>D: 处理恢复
+```
+
+
+## ADK 包 API
+
+ADK 包提供了用于构建具有human-in-the-loop能力的可中断 agent 的高级抽象。
+
+### 1. 用于中断的 API
+
+#### `Interrupt`
+创建一个基础的中断动作。当 agent 需要暂停执行以请求外部输入或干预，但不需要保存任何内部状态以供恢复时使用。
+
+```go
+func Interrupt(ctx context.Context, info any) *AgentEvent
+```
+
+**参数:**
+- `ctx`: 正在运行组件的上下文。
+- `info`: 描述中断原因的面向用户的数据。
+
+**返回:** 带有中断动作的 `*AgentEvent`。
+
+**示例:**
+```go
+// 在 agent 的 Run 方法内部：
+
+// 创建一个简单的中断以请求澄清。
+return adk.Interrupt(ctx, "用户查询不明确，请澄清。")
+```
+
+---
+
+#### `StatefulInterrupt`
+创建一个中断动作，同时保存 agent 的内部状态。当 agent 具有必须恢复才能正确继续的内部状态时使用。
+
+```go
+func StatefulInterrupt(ctx context.Context, info any, state any) *AgentEvent
+```
+
+**参数:**
+- `ctx`: 正在运行组件的上下文。
+- `info`: 描述中断的面向用户的数据。
+- `state`: agent 的内部状态对象，它将被序列化并存储。
+
+**返回:** 带有中断动作的 `*AgentEvent`。
+
+**示例:**
+```go
+// 在 agent 的 Run 方法内部：
+
+// 定义要保存的状态。
+type MyAgentState struct {
+ ProcessedItems int
+ CurrentTopic string
+}
+
+currentState := &MyAgentState{
+ ProcessedItems: 42,
+ CurrentTopic: "HITL",
+}
+
+// 中断并保存当前状态。
+return adk.StatefulInterrupt(ctx, "在继续前需要用户反馈", currentState)
+```
+
+---
+
+#### `CompositeInterrupt`
+为协调多个子组件的组件创建一个中断动作。它将一个或多个子 agent 的中断组合成一个单一、内聚的中断。任何包含子 agent 的 agent（例如，自定义的 `Sequential` 或 `Parallel` agent）都使用此功能来传播其子级的中断。
+
+```go
+func CompositeInterrupt(ctx context.Context, info any, state any,
+ subInterruptSignals ...*InterruptSignal) *AgentEvent
+```
+
+**参数:**
+- `ctx`: 正在运行组件的上下文。
+- `info`: 描述协调器自身中断原因的面向用户的数据。
+- `state`: 协调器 agent 自身的状态（例如，被中断的子 agent 的索引）。
+- `subInterruptSignals`: 来自被中断子 agent 的 `InterruptSignal` 对象的变长列表。
+
+**返回:** 带有中断动作的 `*AgentEvent`。
+
+**示例:**
+```go
+// 在一个运行两个子 agent 的自定义顺序 agent 中...
+subAgent1 := &myInterruptingAgent{}
+subAgent2 := &myOtherAgent{}
+
+// 如果 subAgent1 返回一个中断事件...
+subInterruptEvent := subAgent1.Run(ctx, input)
+
+// 父 agent 必须捕获它并将其包装在 CompositeInterrupt 中。
+if subInterruptEvent.Action.Interrupted != nil {
+ // 父 agent 可以添加自己的状态，比如哪个子 agent 被中断了。
+ parentState := map[string]int{"interrupted_child_index": 0}
+
+ //向上冒泡中断。
+ return adk.CompositeInterrupt(ctx,
+ "一个子 agent 需要注意",
+ parentState,
+ subInterruptEvent.Action.Interrupted.internalInterrupted,
+ )
+}
+```
+
+### 2. 用于获取中断信息的 API
+
+#### `InterruptInfo` 和 `InterruptCtx`
+当 agent 执行被中断时，`AgentEvent` 包含结构化的中断信息。`InterruptInfo` 结构体包含一个 `InterruptCtx` 对象列表，每个对象代表层级中的一个中断点。
+
+`InterruptCtx` 为单个可恢复的中断点提供了一个完整的、面向用户的上下文。
+
+```go
+type InterruptCtx struct {
+ // ID 是中断点的唯一、完全限定地址，用于定向恢复。
+ // 例如："agent:A;node:graph_a;tool:tool_call_123"
+ ID string
+
+ // Address 是导致中断点的 AddressSegment 段的结构化序列。
+ Address Address
+
+ // Info 是与中断关联的面向用户的信息，由触发它的组件提供。
+ Info any
+
+ // IsRootCause 指示中断点是否是中断的确切根本原因。
+ IsRootCause bool
+
+ // Parent 指向中断链中父组件的上下文（对于顶级中断为 nil）。
+ Parent *InterruptCtx
+}
+```
+
+以下示例展示了如何访问此信息：
+
+```go
+// 在应用层，中断后：
+if event.Action != nil && event.Action.Interrupted != nil {
+ interruptInfo := event.Action.Interrupted
+
+ // 获取所有中断点的扁平列表
+ interruptPoints := interruptInfo.InterruptContexts
+
+ for _, point := range interruptPoints {
+ // 每个点都包含一个唯一的 ID、面向用户的信息及其层级地址
+ fmt.Printf("Interrupt ID: %s, Address: %s, Info: %v\n", point.ID, point.Address.String(), point.Info)
+ }
+}
+```
+
+### 3. 用于最终用户恢复的 API
+
+#### `(*Runner).TargetedResume`
+使用“显式定向恢复”策略从检查点继续中断的执行。这是最常见和最强大的恢复方式，允许您定位特定的中断点并为其提供数据。
+
+使用此方法时：
+- 地址在 `targets` 映射中的组件将是显式目标。
+- 地址不在 `targets` 映射中的被中断组件必须重新中断自己以保留其状态。
+
+```go
+func (r *Runner) TargetedResume(ctx context.Context, checkPointID string,
+ targets map[string]any, opts ...AgentRunOption) (*AsyncIterator[*AgentEvent], error)
+```
+
+**参数:**
+- `ctx`: 用于恢复的上下文。
+- `checkPointID`: 要从中恢复的检查点的标识符。
+- `targets`: 中断 ID 到恢复数据的映射。这些 ID 可以指向整个执行图中的任何可中断组件。
+- `opts`: 额外的运行选项。
+
+**返回:** agent 事件的异步迭代器。
+
+**示例:**
+```go
+// 收到中断事件后...
+interruptID := interruptEvent.Action.Interrupted.InterruptContexts[0].ID
+
+// 为特定中断点准备数据。
+resumeData := map[string]any{
+ interruptID: "这是您请求的澄清。",
+}
+
+// 使用目标数据恢复执行。
+resumeIterator, err := runner.TargetedResume(ctx, "my-checkpoint-id", resumeData)
+if err != nil {
+ // 处理错误
+}
+
+// 处理来自恢复迭代器的事件
+for event := range resumeIterator.Events() {
+ if event.Err != nil {
+ // 处理事件错误
+ break
+ }
+ // 处理 agent 事件
+ fmt.Printf("Event: %+v\n", event)
+}
+```
+
+### 4. 用于开发者恢复的 API
+
+#### `ResumeInfo` 结构体
+`ResumeInfo` 持有恢复中断的 agent 执行所需的所有信息。它由框架创建并传递给 agent 的 `Resume` 方法。
+
+```go
+type ResumeInfo struct {
+ // WasInterrupted 指示此 agent 是否是中断的直接来源。
+ WasInterrupted bool
+
+ // InterruptState 持有通过 StatefulInterrupt 或 CompositeInterrupt 保存的状态。
+ InterruptState any
+
+ // IsResumeTarget 指示此 agent 是否是 TargetedResume 的特定目标。
+ IsResumeTarget bool
+
+ // ResumeData 持有用户为此 agent 提供的数据。
+ ResumeData any
+
+ // ... 其他字段
+}
+```
+
+**示例:**
+```go
+import (
+ "context"
+ "errors"
+ "fmt"
+
+ "github.com/cloudwego/eino/adk"
+)
+
+// 在 agent 的 Resume 方法内部：
+func (a *myAgent) Resume(ctx context.Context, info *adk.ResumeInfo, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ if !info.WasInterrupted {
+ // 在恢复流程中不应发生。
+ return adk.NewAsyncIterator([]*adk.AgentEvent{{Err: errors.New("not an interrupt")}}, nil)
+ }
+
+ if !info.IsResumeTarget {
+ // 此 agent 不是特定目标，因此必须重新中断以保留其状态。
+ return adk.StatefulInterrupt(ctx, "等待工作流的另一部分被恢复", info.InterruptState)
+ }
+
+ // 此 agent 是目标。处理恢复数据。
+ if info.ResumeData != nil {
+ userInput, ok := info.ResumeData.(string)
+ if ok {
+ // 处理用户输入并继续执行
+ fmt.Printf("收到用户输入: %s\n", userInput)
+ // 根据用户输入更新 agent 状态
+ a.currentState.LastUserInput = userInput
+ }
+ }
+
+ // 继续正常执行逻辑
+ return a.Run(ctx, &adk.AgentInput{Input: "resumed execution"})
+}
+```
+
+## Compose 包 API
+
+`compose` 包提供了用于创建复杂、可中断工作流的低级构建块。
+
+### 1. 用于中断的 API
+
+#### `Interrupt`
+创建一个特殊错误，该错误向执行引擎发出信号，以在组件的特定地址处中断当前运行并保存检查点。这是单个、非复合组件发出可恢复中断信号的标准方式。
+
+```go
+func Interrupt(ctx context.Context, info any) error
+```
+
+**参数:**
+- `ctx`: 正在运行组件的上下文，用于检索当前执行地址。
+- `info`: 关于中断的面向用户的信息。此信息不会被持久化，但会通过 `InterruptCtx` 暴露给调用应用程序。
+
+---
+
+#### `StatefulInterrupt`
+与 `Interrupt` 类似，但也保存组件的内部状态。状态保存在检查点中，并在恢复时通过 `GetInterruptState` 提供回组件。
+
+```go
+func StatefulInterrupt(ctx context.Context, info any, state any) error
+```
+
+**参数:**
+- `ctx`: 正在运行组件的上下文。
+- `info`: 关于中断的面向用户的信息。
+- `state`: 中断组件需要持久化的内部状态。
+
+---
+
+#### `CompositeInterrupt`
+创建一个表示复合中断的特殊错误。它专为“复合”节点（如 `ToolsNode`）或任何协调多个独立的、可中断子流程的组件而设计。它将多个子中断错误捆绑成一个单一的错误，引擎可以将其解构为可恢复点的扁平列表。
+
+```go
+func CompositeInterrupt(ctx context.Context, info any, state any, errs ...error) error
+```
+
+**参数:**
+- `ctx`: 正在运行的复合节点的上下文。
+- `info`: 复合节点本身的面向用户的信息（可以为 `nil`）。
+- `state`: 复合节点本身的状态（可以为 `nil`）。
+- `errs`: 来自子流程的错误列表。这些可以是 `Interrupt`、`StatefulInterrupt` 或嵌套的 `CompositeInterrupt` 错误。
+
+**示例:**
+```go
+// 一个并行运行多个进程的节点。
+var errs []error
+for _, process := range processes {
+ subCtx := compose.AppendAddressSegment(ctx, "process", process.ID)
+ _, err := process.Run(subCtx)
+ if err != nil {
+ errs = append(errs, err)
+ }
+}
+
+// 如果任何子流程中断，则将它们捆绑起来。
+if len(errs) > 0 {
+ // 复合节点可以保存自己的状态，例如，哪些进程已经完成。
+ return compose.CompositeInterrupt(ctx, "并行执行需要输入", parentState, errs...)
+}
+```
+
+### 2. 用于获取中断信息的 API
+
+#### `ExtractInterruptInfo`
+从 `Runnable` 的 `Invoke` 或 `Stream` 方法返回的错误中提取结构化的 `InterruptInfo` 对象。这是应用程序在执行暂停后获取所有中断点列表的主要方式。
+
+```go
+composeInfo, ok := compose.ExtractInterruptInfo(err)
+if ok {
+ // 访问中断上下文
+ interruptContexts := composeInfo.InterruptContexts
+}
+```
+
+**示例:**
+```go
+// 在调用一个中断的图之后...
+_, err := graph.Invoke(ctx, "initial input")
+
+if err != nil {
+ interruptInfo, isInterrupt := compose.ExtractInterruptInfo(err)
+ if isInterrupt {
+ fmt.Printf("执行被 %d 个中断点中断。\n", len(interruptInfo.InterruptContexts))
+ // 现在你可以检查 interruptInfo.InterruptContexts 来决定如何恢复。
+ }
+}
+```
+
+### 3. 用于最终用户恢复的 API
+
+#### `Resume`
+通过不提供数据来定位一个或多个组件，为“显式定向恢复”操作准备上下文。当恢复行为本身就是信号时，这很有用。
+
+```go
+func Resume(ctx context.Context, interruptIDs ...string) context.Context
+```
+
+**示例:**
+```go
+// 中断后，我们得到两个中断 ID：id1 和 id2。
+// 我们想在不提供特定数据的情况下恢复两者。
+resumeCtx := compose.Resume(context.Background(), id1, id2)
+
+// 将此上下文传递给下一个 Invoke/Stream 调用。
+// 在对应于 id1 和 id2 的组件中，GetResumeContext 将返回 isResumeFlow = true。
+```
+
+---
+
+#### `ResumeWithData`
+准备一个上下文以使用数据恢复单个特定组件。它是 `BatchResumeWithData` 的便捷包装器。
+
+```go
+func ResumeWithData(ctx context.Context, interruptID string, data any) context.Context
+```
+
+**示例:**
+```go
+// 使用特定数据恢复单个中断点。
+resumeCtx := compose.ResumeWithData(context.Background(), interruptID, "这是您请求的特定数据。")
+
+// 将此上下文传递给下一个 Invoke/Stream 调用。
+```
+
+---
+
+#### `BatchResumeWithData`
+这是准备恢复上下文的核心函数。它将恢复目标（中断 ID）及其相应数据的映射注入到上下文中。中断 ID 作为键存在的组件在调用 `GetResumeContext` 时将收到 `isResumeFlow = true`。
+
+```go
+func BatchResumeWithData(ctx context.Context, resumeData map[string]any) context.Context
+```
+
+**示例:**
+```go
+// 一次性恢复多个中断点，每个中断点使用不同的数据。
+resumeData := map[string]any{
+ "interrupt-id-1": "第一个点的数据。",
+ "interrupt-id-2": 42, // 数据可以是任何类型。
+ "interrupt-id-3": nil, // 等效于对此 ID 使用 Resume()。
+}
+
+resumeCtx := compose.BatchResumeWithData(context.Background(), resumeData)
+
+// 将此上下文传递给下一个 Invoke/Stream 调用。
+```
+
+### 4. 用于开发者恢复的 API
+
+#### `GetInterruptState`
+提供一种类型安全的方式来检查和检索先前中断的持久化状态。这是组件用来了解其过去状态的主要函数。
+
+```go
+func GetInterruptState[T any](ctx context.Context) (wasInterrupted bool, hasState bool, state T)
+```
+
+**返回值:**
+- `wasInterrupted`: 如果节点是先前中断的一部分，则为 `true`。
+- `hasState`: 如果提供了状态并成功转换为类型 `T`，则为 `true`。
+- `state`: 类型化的状态对象。
+
+**示例:**
+```go
+// 在 lambda 或 tool 的执行逻辑内部：
+wasInterrupted, hasState, state := compose.GetInterruptState[*MyState](ctx)
+
+if wasInterrupted {
+ fmt.Println("此组件在先前的运行中被中断。")
+ if hasState {
+ fmt.Printf("已恢复状态: %+v\n", state)
+ }
+} else {
+ // 这是此组件在此执行中第一次运行。
+}
+```
+
+---
+
+#### `GetResumeContext`
+检查当前组件是否是恢复操作的目标，并检索用户提供的任何数据。这通常在 `GetInterruptState` 确认组件被中断后调用。
+
+```go
+func GetResumeContext[T any](ctx context.Context) (isResumeFlow bool, hasData bool, data T)
+```
+
+**返回值:**
+- `isResumeFlow`: 如果组件被恢复调用明确指定为目标，则为 `true`。如果为 `false`，组件必须重新中断以保留其状态。
+- `hasData`: 如果为此组件提供了数据，则为 `true`。
+- `data`: 用户提供的类型化数据。
+
+**示例:**
+```go
+// 在 lambda 或 tool 的执行逻辑内部，检查 GetInterruptState 之后：
+wasInterrupted, _, oldState := compose.GetInterruptState[*MyState](ctx)
+
+if wasInterrupted {
+ isTarget, hasData, resumeData := compose.GetResumeContext[string](ctx)
+ if isTarget {
+ // 此组件是目标，继续执行逻辑。
+ if hasData {
+ fmt.Printf("使用用户数据恢复: %s\n", resumeData)
+ }
+ // 使用恢复的状态和恢复数据完成工作
+ result := processWithStateAndData(state, resumeData)
+ return result, nil
+ } else {
+ // 此组件不是目标，因此必须重新中断。
+ return compose.StatefulInterrupt(ctx, "等待另一个组件被恢复", oldState)
+ }
+}
+```
+
+## 底层架构：寻址系统
+
+### 对地址的需求
+
+寻址系统旨在解决有效的human-in-the-loop交互中的三个基本需求：
+
+1. **状态附加**：要将本地状态附加到中断点，我们需要为每个中断点提供一个稳定、唯一的定位器。
+2. **定向恢复**：要为特定的中断点提供定向的恢复数据，我们需要一种精确识别每个点的方法。
+3. **中断定位**：要告诉最终用户中断在执行层级中的确切位置。
+
+### 地址如何满足这些需求
+
+地址系统通过三个关键属性满足这些需求：
+
+- **稳定性**：地址在多次执行中保持一致，确保可以可靠地识别相同的中断点。
+- **唯一性**：每个中断点都有一个唯一的地址，从而能够在恢复期间进行精确定位。
+- **层级结构**：地址提供了一个清晰的层级路径，准确显示中断发生在执行流中的哪个位置。
+
+### 地址结构和段类型
+
+#### `Address` 结构
+```go
+type Address struct {
+ Segments []AddressSegment
+}
+
+type AddressSegment struct {
+ Type AddressSegmentType
+ ID string
+ SubID string
+}
+```
+
+#### 地址结构图
+
+以下图表从 ADK 和 Compose 两个层面说明了 `Address` 及其 `AddressSegment` 的层级结构：
+
+**ADK 层视角** (简化的、以 Agent 为中心的视图):
+```mermaid
+graph TD
+ A[Address] --> B[AddressSegment 1]
+ A --> C[AddressSegment 2]
+ A --> D[AddressSegment 3]
+
+ B --> B1[Type: Agent]
+ B --> B2[ID: A]
+
+ C --> C1[Type: Agent]
+ C --> C2[ID: B]
+
+ D --> D1[Type: Tool]
+ D --> D2[ID: search_tool]
+ D --> D3[SubID: 1]
+
+ style A fill:#e1f5fe
+ style B fill:#f3e5f5
+ style C fill:#f3e5f5
+ style D fill:#f3e5f5
+ style B1 fill:#e8f5e8
+ style B2 fill:#e8f5e8
+ style C1 fill:#e8f5e8
+ style C2 fill:#e8f5e8
+ style D1 fill:#e8f5e8
+ style D2 fill:#e8f5e8
+ style D3 fill:#e8f5e8
+```
+
+**Compose 层视角** (详细的、完整的层级视图):
+```mermaid
+graph TD
+ A[Address] --> B[AddressSegment 1]
+ A --> C[AddressSegment 2]
+ A --> D[AddressSegment 3]
+ A --> E[AddressSegment 4]
+
+ B --> B1[Type: Runnable]
+ B --> B2[ID: my_graph]
+
+ C --> C1[Type: Node]
+ C --> C2[ID: sub_graph]
+
+ D --> D1[Type: Node]
+ D --> D2[ID: tools_node]
+
+ E --> E1[Type: Tool]
+ E --> E2[ID: mcp_tool]
+ E --> E3[SubID: 1]
+
+ style A fill:#e1f5fe
+ style B fill:#f3e5f5
+ style C fill:#f3e5f5
+ style D fill:#f3e5f5
+ style E fill:#f3e5f5
+ style B1 fill:#e8f5e8
+ style B2 fill:#e8f5e8
+ style C1 fill:#e8f5e8
+ style C2 fill:#e8f5e8
+ style D1 fill:#e8f5e8
+ style D2 fill:#e8f5e8
+ style E1 fill:#e8f5e8
+ style E2 fill:#e8f5e8
+ style E3 fill:#e8f5e8
+```
+
+### 特定层的地址段类型
+
+#### ADK 层段类型
+ADK 层提供了执行层级的简化、以 agent 为中心的抽象：
+
+```go
+type AddressSegmentType = core.AddressSegmentType
+
+const (
+ AddressSegmentAgent AddressSegmentType = "agent"
+ AddressSegmentTool AddressSegmentType = "tool"
+)
+```
+
+**关键特性:**
+- **Agent 段**: 表示 agent 级别的执行段（通常省略 `SubID`）。
+- **Tool 段**: 表示 tool 级别的执行段（`SubID` 用于确保唯一性）。
+- **简化视图**: 为 agent 开发者抽象掉底层复杂性。
+- **示例路径**: `Agent:A → Agent:B → Tool:search_tool:1`
+
+#### Compose 层段类型
+`compose` 层对整个执行层级提供了细粒度的控制和可见性：
+
+```go
+type AddressSegmentType = core.AddressSegmentType
+
+const (
+ AddressSegmentRunnable AddressSegmentType = "runnable" // Graph, Workflow, or Chain
+ AddressSegmentNode AddressSegmentType = "node" // Individual graph nodes
+ AddressSegmentTool AddressSegmentType = "tool" // Specific tool calls
+)
+```
+
+**关键特性:**
+- **Runnable 段**: 表示顶层可执行文件（Graph、Workflow、Chain）。
+- **Node 段**: 表示执行图中的单个节点。
+- **Tool 段**: 表示 `ToolsNode` 内的特定 tool 调用。
+- **详细视图**: 提供对执行层级的完全可见性。
+- **示例路径**: `Runnable:my_graph → Node:sub_graph → Node:tools_node → Tool:mcp_tool:1`
+
+### 可扩展性与设计原则
+
+地址段类型系统被设计为**可扩展的**。框架开发者可以添加新的段类型以支持额外的执行模式或自定义组件，同时保持向后兼容性。
+
+**关键设计原则**：ADK 层提供简化的、以 agent 为中心的抽象，而 `compose` 层处理执行层级的全部复杂性。这种分层方法允许开发者在适合其需求的抽象级别上工作。
+
+## 向后兼容性
+
+human-in-the-loop框架保持与现有代码的完全向后兼容性。所有先前的中断和恢复模式将继续像以前一样工作，同时通过新的寻址系统提供增强的功能。
+
+### 1. 图中断兼容性
+
+在节点/工具中使用已弃用的 `NewInterruptAndRerunErr` 或 `InterruptAndRerun` 的先前图中断流程将继续被支持，但需要一个关键的额外步骤：**错误包装**。
+
+由于这些遗留函数不是地址感知的，调用它们的组件有责任捕获错误，并使用 `WrapInterruptAndRerunIfNeeded` 辅助函数将地址信息包装进去。这通常在协调遗留组件的复合节点内部完成。
+
+> **注意**：如果您选择**不**使用 `WrapInterruptAndRerunIfNeeded`，遗留行为将被保留。最终用户仍然可以像以前一样使用 `ExtractInterruptInfo` 从错误中获取信息。但是，由于产生的中断上下文将缺少正确的地址，因此将无法对该特定中断点使用新的定向恢复 API。要完全启用新的地址感知功能，必须进行包装。
+
+```go
+// 1. 一个使用已弃用中断的遗留工具
+func myLegacyTool(ctx context.Context, input string) (string, error) {
+ // ... tool 逻辑
+ // 这个错误不是地址感知的。
+ return "", compose.NewInterruptAndRerunErr("需要用户批准")
+}
+
+// 2. 一个调用遗留工具的复合节点
+var legacyToolNode = compose.InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ out, err := myLegacyTool(ctx, input)
+ if err != nil {
+ // 关键：调用者必须包装错误以添加地址。
+ // "tool:legacy_tool" 段将被附加到当前地址。
+ segment := compose.AddressSegment{Type: "tool", ID: "legacy_tool"}
+ return "", compose.WrapInterruptAndRerunIfNeeded(ctx, segment, err)
+ }
+ return out, nil
+})
+
+// 3. 最终用户代码现在可以看到完整地址。
+_, err := graph.Invoke(ctx, input)
+if err != nil {
+ interruptInfo, exists := compose.ExtractInterruptInfo(err)
+ if exists {
+ // 中断上下文现在将拥有一个正确的、完全限定的地址。
+ fmt.Printf("Interrupt Address: %s\n", interruptInfo.InterruptContexts[0].Address.String())
+ }
+}
+```
+
+**增强功能**：通过包装错误，`InterruptInfo` 将包含一个正确的 `[]*InterruptCtx`，其中包含完全限定的地址，从而允许遗留组件无缝集成到新的人机协同框架中。
+
+### 2. 对编译时静态中断图的兼容性
+
+通过 `WithInterruptBeforeNodes` 或 `WithInterruptAfterNodes` 添加的先前静态中断图继续有效，但状态处理的方式得到了显著改进。
+
+当静态中断被触发时，会生成一个 `InterruptCtx`，其地址指向图本身。关键在于，`InterruptCtx.Info` 字段现在直接暴露了该图的状态。
+
+这启用了一个更直接、更直观的工作流：
+1. 最终用户收到 `InterruptCtx`，并可以通过 `.Info` 字段检查图的实时状态。
+2. 他们可以直接修改这个状态对象。
+3. 然后，他们可以通过 `ResumeWithData` 和 `InterruptCtx.ID` 将修改后的状态对象传回以恢复执行。
+
+这种新模式通常不再需要使用旧的 `WithStateModifier` 选项，尽管为了完全的向后兼容性，该选项仍然可用。
+
+```go
+// 1. 定义一个拥有自己本地状态的图
+type MyGraphState struct {
+ SomeValue string
+}
+
+g := compose.NewGraph[string, string](compose.WithGenLocalState(func(ctx context.Context) *MyGraphState {
+ return &MyGraphState{SomeValue: "initial"}
+}))
+// ... 向图中添加节点1和节点2 ...
+
+// 2. 使用静态中断点编译图
+// 这将在 "node_1" 节点完成后中断图本身。
+graph, err := g.Compile(ctx, compose.WithInterruptAfterNodes([]string{"node_1"}))
+
+// 3. 运行图，这将触发静态中断
+_, err = graph.Invoke(ctx, "start")
+
+// 4. 提取中断上下文和图的状态
+interruptInfo, isInterrupt := compose.ExtractInterruptInfo(err)
+if isInterrupt {
+ interruptCtx := interruptInfo.InterruptContexts[0]
+
+ // .Info 字段暴露了图的当前状态
+ graphState, ok := interruptCtx.Info.(*MyGraphState)
+ if ok {
+ // 5. 直接修改状态
+ fmt.Printf("Original state value: %s\n", graphState.SomeValue) // 打印 "initial"
+ graphState.SomeValue = "a-new-value-from-user"
+
+ // 6. 通过传回修改后的状态对象来恢复
+ resumeCtx := compose.ResumeWithData(context.Background(), interruptCtx.ID, graphState)
+ result, err := graph.Invoke(resumeCtx, "start")
+ // ... 执行将继续，并且 node_2 现在将看到修改后的状态。
+ }
+}
+```
+
+### 3. Agent 中断兼容性
+
+与旧版 agent 的兼容性是在数据结构层面维护的，确保了旧的 agent 实现能在新框架内继续运作。其关键在于 `adk.InterruptInfo` 和 `adk.ResumeInfo` 结构体是如何被填充的。
+
+**对最终用户（应用层）而言：**
+当从 agent 收到一个中断时，`adk.InterruptInfo` 结构体中会同时填充以下两者：
+- 新的、结构化的 `InterruptContexts` 字段。
+- 遗留的 `Data` 字段，它将包含原始的中断信息（例如 `ChatModelAgentInterruptInfo` 或 `WorkflowInterruptInfo`）。
+
+这使得最终用户可以逐步迁移他们的应用逻辑来使用更丰富的 `InterruptContexts`，同时在需要时仍然可以访问旧的 `Data` 字段。
+
+**对 Agent 开发者而言：**
+当一个旧版 agent 的 `Resume` 方法被调用时，它收到的 `adk.ResumeInfo` 结构体仍然包含现已弃用的嵌入式 `InterruptInfo` 字段。该字段被填充了相同的遗留数据结构，允许 agent 开发者维持其现有的恢复逻辑，而无需立即更新到新的地址感知 API。
+
+```go
+// --- 最终用户视角 ---
+
+// 在 agent 运行后，你收到了一个中断事件。
+if event.Action != nil && event.Action.Interrupted != nil {
+ interruptInfo := event.Action.Interrupted
+
+ // 1. 新方式：访问结构化的中断上下文
+ if len(interruptInfo.InterruptContexts) > 0 {
+ fmt.Printf("New structured context available: %+v\n", interruptInfo.InterruptContexts[0])
+ }
+
+ // 2. 旧方式（仍然有效）：访问遗留的 Data 字段
+ if chatInterrupt, ok := interruptInfo.Data.(*adk.ChatModelAgentInterruptInfo); ok {
+ fmt.Printf("Legacy ChatModelAgentInterruptInfo still accessible.\n")
+ // ... 使用旧结构体的逻辑
+ }
+}
+
+
+// --- Agent 开发者视角 ---
+
+// 在一个旧版 agent 的 Resume 方法内部：
+func (a *myLegacyAgent) Resume(ctx context.Context, info *adk.ResumeInfo) *adk.AsyncIterator[*adk.AgentEvent] {
+ // 已弃用的嵌入式 InterruptInfo 字段仍然会被填充。
+ // 这使得旧的恢复逻辑可以继续工作。
+ if info.InterruptInfo != nil {
+ if chatInterrupt, ok := info.InterruptInfo.Data.(*adk.ChatModelAgentInterruptInfo); ok {
+ // ... 依赖于旧的 ChatModelAgentInterruptInfo 结构体的现有恢复逻辑
+ fmt.Println("Resuming based on legacy InterruptInfo.Data field.")
+ }
+ }
+
+ // ... 继续执行
+ return a.Run(ctx, &adk.AgentInput{Input: "resumed execution"})
+}
+```
+
+### 迁移优势
+
+- **保留遗留行为**: 现有代码将继续按其原有方式运行。旧的中断模式不会导致程序崩溃，但它们也不会在不经修改的情况下自动获得新的地址感知能力。
+- **渐进式采用**: 团队可以根据具体情况选择性地启用新功能。例如，你可以只在你需要定向恢复的工作流中，用 `WrapInterruptAndRerunIfNeeded` 来包装遗留的中断。
+- **增强的功能**: 新的寻址系统为所有中断提供了更丰富的结构化上下文 (`InterruptCtx`)，同时旧的数据字段仍然会被填充以实现完全兼容。
+- **灵活的状态管理**: 对于静态图中断，你可以选择通过 `.Info` 字段进行现代、直接的状态修改，或者继续使用旧的 `WithStateModifier` 选项。
+
+这种向后兼容性模型确保了现有用户的平滑过渡，同时为采用强大的新的 human-in-the-loop 交互功能提供了清晰的路径。
+
+## 实现示例
+
+有关human-in-the-loop模式的完整、可工作的示例，请参阅 [eino-examples repository](https://github.com/cloudwego/eino-examples/pull/125)。该仓库包含四个作为独立示例实现的典型模式：
+
+### 1. 审批模式
+在关键工具调用之前的简单、显式批准。非常适合不可逆操作，如数据库修改或金融交易。
+
+### 2. 审查与编辑模式
+高级模式，允许在执行前进行人工审查和原地编辑工具调用参数。非常适合纠正误解。
+
+### 3. 反馈循环模式
+迭代优化模式，其中 agent 生成内容，人类提供定性反馈以进行改进。
+
+### 4. 追问模式
+主动模式，其中 agent 识别出不充分的工具输出并请求澄清或下一步行动。
+
+这些示例演示了中断/恢复机制的实际用法，并附有可重用的工具包装器和详细文档。
\ No newline at end of file
diff --git a/adk/agent_tool.go b/adk/agent_tool.go
index 9273342d..6b6f7089 100644
--- a/adk/agent_tool.go
+++ b/adk/agent_tool.go
@@ -91,40 +91,19 @@ func (at *agentTool) Info(ctx context.Context) (*schema.ToolInfo, error) {
}
func (at *agentTool) InvokableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (string, error) {
- var intData *agentToolInterruptInfo
- var bResume bool
- err := compose.ProcessState(ctx, func(ctx context.Context, s *State) error {
- toolCallID := compose.GetToolCallID(ctx)
- intData, bResume = s.AgentToolInterruptData[toolCallID]
- if bResume {
- delete(s.AgentToolInterruptData, toolCallID)
- }
- return nil
- })
- if err != nil {
- // cannot resume
- bResume = false
- }
-
var ms *mockStore
var iter *AsyncIterator[*AgentEvent]
- if bResume {
- ms = newResumeStore(intData.Data)
+ var err error
- iter, err = newInvokableAgentToolRunner(at.agent, ms).Resume(ctx, mockCheckPointID, getOptionsByAgentName(at.agent.Name(ctx), opts)...)
- if err != nil {
- return "", err
- }
- } else {
+ wasInterrupted, hasState, state := compose.GetInterruptState[[]byte](ctx)
+ if !wasInterrupted {
ms = newEmptyStore()
var input []Message
if at.fullChatHistoryAsInput {
- history, err := getReactChatHistory(ctx, at.agent.Name(ctx))
+ input, err = getReactChatHistory(ctx, at.agent.Name(ctx))
if err != nil {
return "", err
}
-
- input = history
} else {
if at.inputSchema == nil {
// default input schema
@@ -144,7 +123,20 @@ func (at *agentTool) InvokableRun(ctx context.Context, argumentsInJSON string, o
}
}
- iter = newInvokableAgentToolRunner(at.agent, ms).Run(ctx, input, append(getOptionsByAgentName(at.agent.Name(ctx), opts), WithCheckPointID(mockCheckPointID))...)
+ iter = newInvokableAgentToolRunner(at.agent, ms).Run(ctx, input,
+ append(getOptionsByAgentName(at.agent.Name(ctx), opts), WithCheckPointID(mockCheckPointID))...)
+ } else {
+ if !hasState {
+ return "", fmt.Errorf("agent tool '%s' interrupt has happened, but cannot find interrupt state", at.agent.Name(ctx))
+ }
+
+ ms = newResumeStore(state)
+
+ iter, err = newInvokableAgentToolRunner(at.agent, ms).
+ Resume(ctx, mockCheckPointID, getOptionsByAgentName(at.agent.Name(ctx), opts)...)
+ if err != nil {
+ return "", err
+ }
}
var lastEvent *AgentEvent
@@ -169,17 +161,9 @@ func (at *agentTool) InvokableRun(ctx context.Context, argumentsInJSON string, o
if !existed {
return "", fmt.Errorf("interrupt has happened, but cannot find interrupt info")
}
- err = compose.ProcessState(ctx, func(ctx context.Context, st *State) error {
- st.AgentToolInterruptData[compose.GetToolCallID(ctx)] = &agentToolInterruptInfo{
- LastEvent: lastEvent,
- Data: data,
- }
- return nil
- })
- if err != nil {
- return "", fmt.Errorf("failed to save agent tool checkpoint to state: %w", err)
- }
- return "", compose.InterruptAndRerun
+
+ return "", compose.CompositeInterrupt(ctx, "agent tool interrupt", data,
+ lastEvent.Action.internalInterrupted)
}
if lastEvent == nil {
diff --git a/adk/agent_tool_test.go b/adk/agent_tool_test.go
index 13f420c4..5a0487ee 100644
--- a/adk/agent_tool_test.go
+++ b/adk/agent_tool_test.go
@@ -217,3 +217,278 @@ func TestGetReactHistory(t *testing.T) {
schema.UserMessage("For context: [MyAgent] `transfer_to_agent` tool returned result: successfully transferred to agent [DestAgentName]."),
}, result)
}
+
+// mockAgentWithInputCapture implements the Agent interface for testing and captures the input it receives
+type mockAgentWithInputCapture struct {
+ name string
+ description string
+ capturedInput []Message
+ responses []*AgentEvent
+}
+
+func (a *mockAgentWithInputCapture) Name(_ context.Context) string {
+ return a.name
+}
+
+func (a *mockAgentWithInputCapture) Description(_ context.Context) string {
+ return a.description
+}
+
+func (a *mockAgentWithInputCapture) Run(_ context.Context, input *AgentInput, _ ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ a.capturedInput = input.Messages
+
+ iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ go func() {
+ defer generator.Close()
+
+ for _, event := range a.responses {
+ generator.Send(event)
+
+ // If the event has an Exit action, stop sending events
+ if event.Action != nil && event.Action.Exit {
+ break
+ }
+ }
+ }()
+
+ return iterator
+}
+
+func newMockAgentWithInputCapture(name, description string, responses []*AgentEvent) *mockAgentWithInputCapture {
+ return &mockAgentWithInputCapture{
+ name: name,
+ description: description,
+ responses: responses,
+ }
+}
+
+func TestAgentToolWithOptions(t *testing.T) {
+ // Test Case 1: WithFullChatHistoryAsInput
+ t.Run("WithFullChatHistoryAsInput", func(t *testing.T) {
+ ctx := context.Background()
+
+ // 1. Set up a mock agent that will capture the input it receives
+ mockAgent := newMockAgentWithInputCapture("test-agent", "a test agent", []*AgentEvent{
+ {
+ AgentName: "test-agent",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ IsStreaming: false,
+ Message: schema.AssistantMessage("done", nil),
+ Role: schema.Assistant,
+ },
+ },
+ },
+ })
+
+ // 2. Create an agentTool with the option
+ agentTool := NewAgentTool(ctx, mockAgent, WithFullChatHistoryAsInput())
+
+ // 3. Set up a context with a chat history using a graph
+ history := []Message{
+ schema.UserMessage("first user message"),
+ schema.AssistantMessage("first assistant response", nil),
+ }
+
+ g := compose.NewGraph[string, string](compose.WithGenLocalState(func(ctx context.Context) (state *State) {
+ return &State{
+ AgentName: "react-agent",
+ Messages: append(history, schema.AssistantMessage("tool call msg", nil)),
+ }
+ }))
+
+ assert.NoError(t, g.AddLambdaNode("1", compose.InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
+ // Run the tool within the graph context that has the state
+ _, err = agentTool.(tool.InvokableTool).InvokableRun(ctx, `{"request":"some ignored input"}`)
+ return "done", err
+ })))
+ assert.NoError(t, g.AddEdge(compose.START, "1"))
+ assert.NoError(t, g.AddEdge("1", compose.END))
+
+ runner, err := g.Compile(ctx)
+ assert.NoError(t, err)
+
+ // 4. Run the graph which will execute the tool with the state
+ _, err = runner.Invoke(ctx, "")
+ assert.NoError(t, err)
+
+ // 5. Assert that the agent received the full history
+ // The agent should receive: history (minus last assistant message) + transfer messages
+ assert.Len(t, mockAgent.capturedInput, 4) // 2 from history + 2 transfer messages
+ assert.Equal(t, "first user message", mockAgent.capturedInput[0].Content)
+ assert.Equal(t, "For context: [react-agent] said: first assistant response.", mockAgent.capturedInput[1].Content)
+ assert.Equal(t, "For context: [react-agent] called tool: `transfer_to_agent` with arguments: test-agent.", mockAgent.capturedInput[2].Content)
+ assert.Equal(t, "For context: [react-agent] `transfer_to_agent` tool returned result: successfully transferred to agent [test-agent].", mockAgent.capturedInput[3].Content)
+ })
+
+ // Test Case 2: WithAgentInputSchema
+ t.Run("WithAgentInputSchema", func(t *testing.T) {
+ ctx := context.Background()
+
+ // 1. Define a custom schema
+ customSchema := schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
+ "custom_arg": {
+ Desc: "a custom argument",
+ Required: true,
+ Type: schema.String,
+ },
+ })
+
+ // 2. Set up a mock agent to capture input
+ mockAgent := newMockAgentWithInputCapture("schema-agent", "agent with custom schema", []*AgentEvent{
+ {
+ AgentName: "schema-agent",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ IsStreaming: false,
+ Message: schema.AssistantMessage("schema processed", nil),
+ Role: schema.Assistant,
+ },
+ },
+ },
+ })
+
+ // 3. Create agentTool with the custom schema option
+ agentTool := NewAgentTool(ctx, mockAgent, WithAgentInputSchema(customSchema))
+
+ // 4. Verify the Info() method returns the custom schema
+ info, err := agentTool.Info(ctx)
+ assert.NoError(t, err)
+ assert.Equal(t, customSchema, info.ParamsOneOf)
+
+ // 5. Run the tool with arguments matching the custom schema
+ _, err = agentTool.(tool.InvokableTool).InvokableRun(ctx, `{"custom_arg":"hello world"}`)
+ assert.NoError(t, err)
+
+ // 6. Assert that the agent received the correctly parsed argument
+ // With custom schema, the agent should receive the raw JSON as input
+ assert.Len(t, mockAgent.capturedInput, 1)
+ assert.Equal(t, `{"custom_arg":"hello world"}`, mockAgent.capturedInput[0].Content)
+ })
+
+ // Test Case 3: WithAgentInputSchema with complex schema
+ t.Run("WithAgentInputSchema_ComplexSchema", func(t *testing.T) {
+ ctx := context.Background()
+
+ // 1. Define a complex custom schema with multiple parameters
+ complexSchema := schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
+ "name": {
+ Desc: "user name",
+ Required: true,
+ Type: schema.String,
+ },
+ "age": {
+ Desc: "user age",
+ Required: false,
+ Type: schema.Integer,
+ },
+ "active": {
+ Desc: "user status",
+ Required: false,
+ Type: schema.Boolean,
+ },
+ })
+
+ // 2. Set up a mock agent
+ mockAgent := newMockAgentWithInputCapture("complex-agent", "agent with complex schema", []*AgentEvent{
+ {
+ AgentName: "complex-agent",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ IsStreaming: false,
+ Message: schema.AssistantMessage("complex processed", nil),
+ Role: schema.Assistant,
+ },
+ },
+ },
+ })
+
+ // 3. Create agentTool with the complex schema option
+ agentTool := NewAgentTool(ctx, mockAgent, WithAgentInputSchema(complexSchema))
+
+ // 4. Verify the Info() method returns the complex schema
+ info, err := agentTool.Info(ctx)
+ assert.NoError(t, err)
+ assert.Equal(t, complexSchema, info.ParamsOneOf)
+
+ // 5. Run the tool with complex arguments
+ _, err = agentTool.(tool.InvokableTool).InvokableRun(ctx, `{"name":"John","age":30,"active":true}`)
+ assert.NoError(t, err)
+
+ // 6. Assert that the agent received the complex JSON
+ assert.Len(t, mockAgent.capturedInput, 1)
+ assert.Equal(t, `{"name":"John","age":30,"active":true}`, mockAgent.capturedInput[0].Content)
+ })
+
+ // Test Case 4: Both options together
+ t.Run("BothOptionsTogether", func(t *testing.T) {
+ ctx := context.Background()
+
+ // 1. Define a custom schema
+ customSchema := schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
+ "query": {
+ Desc: "search query",
+ Required: true,
+ Type: schema.String,
+ },
+ })
+
+ // 2. Set up a mock agent
+ mockAgent := newMockAgentWithInputCapture("combined-agent", "agent with both options", []*AgentEvent{
+ {
+ AgentName: "combined-agent",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ IsStreaming: false,
+ Message: schema.AssistantMessage("combined processed", nil),
+ Role: schema.Assistant,
+ },
+ },
+ },
+ })
+
+ // 3. Create agentTool with both options
+ agentTool := NewAgentTool(ctx, mockAgent, WithAgentInputSchema(customSchema), WithFullChatHistoryAsInput())
+
+ // 4. Set up a context with chat history using a graph
+ history := []Message{
+ schema.UserMessage("previous conversation"),
+ schema.AssistantMessage("previous response", nil),
+ }
+
+ g := compose.NewGraph[string, string](compose.WithGenLocalState(func(ctx context.Context) (state *State) {
+ return &State{
+ AgentName: "react-agent",
+ Messages: append(history, schema.AssistantMessage("tool call", nil)),
+ }
+ }))
+
+ assert.NoError(t, g.AddLambdaNode("1", compose.InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
+ // Run the tool within the graph context that has the state
+ _, err = agentTool.(tool.InvokableTool).InvokableRun(ctx, `{"query":"current query"}`)
+ return "done", err
+ })))
+ assert.NoError(t, g.AddEdge(compose.START, "1"))
+ assert.NoError(t, g.AddEdge("1", compose.END))
+
+ runner, err := g.Compile(ctx)
+ assert.NoError(t, err)
+
+ // 5. Run the graph which will execute the tool with the state
+ _, err = runner.Invoke(ctx, "")
+ assert.NoError(t, err)
+
+ // 6. Verify both options work together
+ info, err := agentTool.Info(ctx)
+ assert.NoError(t, err)
+ assert.Equal(t, customSchema, info.ParamsOneOf)
+
+ // The agent should receive full history + the custom query
+ assert.Len(t, mockAgent.capturedInput, 4) // 2 history + 2 transfer messages
+ assert.Equal(t, "previous conversation", mockAgent.capturedInput[0].Content)
+ assert.Equal(t, "For context: [react-agent] said: previous response.", mockAgent.capturedInput[1].Content)
+ assert.Equal(t, "For context: [react-agent] called tool: `transfer_to_agent` with arguments: combined-agent.", mockAgent.capturedInput[2].Content)
+ assert.Equal(t, "For context: [react-agent] `transfer_to_agent` tool returned result: successfully transferred to agent [combined-agent].", mockAgent.capturedInput[3].Content)
+ })
+}
diff --git a/adk/chatmodel.go b/adk/chatmodel.go
index 1ccb5a58..8630bec4 100644
--- a/adk/chatmodel.go
+++ b/adk/chatmodel.go
@@ -24,6 +24,7 @@ import (
"fmt"
"math"
"runtime/debug"
+ "strings"
"sync"
"sync/atomic"
@@ -34,6 +35,7 @@ import (
"github.com/cloudwego/eino/components/prompt"
"github.com/cloudwego/eino/components/tool"
"github.com/cloudwego/eino/compose"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/internal/safe"
"github.com/cloudwego/eino/schema"
ub "github.com/cloudwego/eino/utils/callbacks"
@@ -67,6 +69,7 @@ func WithAgentToolRunOptions(opts map[string] /*tool name*/ []AgentRunOption) Ag
})
}
+// Deprecated: use ResumeWithData and ChatModelAgentResumeData instead.
func WithHistoryModifier(f func(context.Context, []Message) []Message) AgentRunOption {
return WrapImplSpecificOptFn(func(t *chatModelAgentRunOptions) {
t.historyModifier = f
@@ -131,6 +134,22 @@ type ChatModelAgentConfig struct {
// Optional. Defaults to defaultGenModelInput which combines instruction and messages.
GenModelInput GenModelInput
+ // TransferTool defines the tool used for transferring tasks to other agents.
+ // Optional. If nil, a default single-transfer tool will be used.
+ //
+ // This field enables configuration of the transfer behavior for the agent:
+ // - Use &transferToAgent{} for single-agent transfers (default)
+ // - Use &ConcurrentTransferTool{} for concurrent multi-agent transfers
+ // - Implement custom transfer tools for specialized transfer logic
+ //
+ // Example usage for concurrent transfers:
+ // config := &ChatModelAgentConfig{
+ // Name: "Orchestrator",
+ // Model: chatModel,
+ // TransferTool: &ConcurrentTransferTool{},
+ // }
+ TransferTool tool.BaseTool
+
// Exit defines the tool used to terminate the agent process.
// Optional. If nil, no Exit Action will be generated.
// You can use the provided 'ExitTool' implementation directly.
@@ -164,7 +183,8 @@ type ChatModelAgent struct {
disallowTransferToParent bool
- exit tool.BaseTool
+ transferTool tool.BaseTool
+ exit tool.BaseTool
// runner
once sync.Once
@@ -190,6 +210,11 @@ func NewChatModelAgent(_ context.Context, config *ChatModelAgentConfig) (*ChatMo
genInput = config.GenModelInput
}
+ transferTool := config.TransferTool
+ if transferTool == nil {
+ transferTool = &transferToAgent{}
+ }
+
return &ChatModelAgent{
name: config.Name,
description: config.Description,
@@ -197,6 +222,7 @@ func NewChatModelAgent(_ context.Context, config *ChatModelAgentConfig) (*ChatMo
model: config.Model,
toolsConfig: config.ToolsConfig,
genModelInput: genInput,
+ transferTool: transferTool,
exit: config.Exit,
outputKey: config.OutputKey,
maxIterations: config.MaxIterations,
@@ -290,6 +316,79 @@ func (tta transferToAgent) InvokableRun(ctx context.Context, argumentsInJSON str
return transferToAgentToolOutput(params.AgentName), nil
}
+// ConcurrentTransferTool is a tool that supports both single and concurrent agent transfers.
+// This tool provides flexible transfer capabilities, allowing agents to transfer tasks
+// to either a single agent or multiple agents concurrently using a fork-join execution model.
+//
+// The tool accepts parameters in a "one-of" format:
+// - "agent_name": Transfer to a single agent
+// - "agent_names": Transfer to multiple agents concurrently
+//
+// When multiple agents are specified, the framework executes them simultaneously
+// and aggregates their results. This enables parallel processing of complex workflows.
+type ConcurrentTransferTool struct{}
+
+func (t *ConcurrentTransferTool) Info(_ context.Context) (*schema.ToolInfo, error) {
+ return &schema.ToolInfo{
+ Name: TransferToAgentToolName,
+ Desc: "Transfer the question to another agent or a group of agents.",
+ ParamsOneOf: schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
+ "agent_name": {
+ Desc: "The name of the agent to transfer to.",
+ Required: false,
+ Type: schema.String,
+ },
+ "agent_names": {
+ Desc: "A list of agent names to transfer to concurrently.",
+ Required: false,
+ Type: schema.Array,
+ ElemInfo: &schema.ParameterInfo{Type: schema.String},
+ },
+ }),
+ }, nil
+}
+
+func (t *ConcurrentTransferTool) InvokableRun(ctx context.Context, argumentsInJSON string, _ ...tool.Option) (string, error) {
+ type transferParams struct {
+ AgentName string `json:"agent_name"`
+ AgentNames []string `json:"agent_names"`
+ }
+
+ params := &transferParams{}
+ if err := sonic.UnmarshalString(argumentsInJSON, params); err != nil {
+ return "", err
+ }
+
+ var dests []string
+ if len(params.AgentNames) > 0 {
+ dests = params.AgentNames
+ } else if params.AgentName != "" {
+ dests = []string{params.AgentName}
+ } else {
+ return "", errors.New("either 'agent_name' or 'agent_names' is required")
+ }
+
+ // Create a single concurrent transfer action with all destination agents
+ var action *AgentAction
+ if len(dests) == 1 {
+ // For single agent, use the standard TransferToAgentAction for consistency
+ action = NewTransferToAgentAction(dests[0])
+ } else {
+ // For multiple agents, use the new ConcurrentTransferToAgentAction
+ action = &AgentAction{
+ ConcurrentTransferToAgent: &ConcurrentTransferToAgentAction{
+ DestAgentNames: dests,
+ },
+ }
+ }
+
+ if err := SendToolGenAction(ctx, TransferToAgentToolName, action); err != nil {
+ return "", fmt.Errorf("failed to send transfer action: %w", err)
+ }
+
+ return fmt.Sprintf("successfully transferred to agents: [%s]", strings.Join(dests, ", ")), nil
+}
+
func (a *ChatModelAgent) Name(_ context.Context) string {
return a.name
}
@@ -341,10 +440,16 @@ type cbHandler struct {
enableStreaming bool
store *mockStore
returnDirectlyToolEvent atomic.Value
+ ctx context.Context
+ addr Address
}
func (h *cbHandler) onChatModelEnd(ctx context.Context,
_ *callbacks.RunInfo, output *model.CallbackOutput) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+3 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
event := EventFromMessage(output.Message, nil, schema.Assistant, "")
h.Send(event)
@@ -353,6 +458,10 @@ func (h *cbHandler) onChatModelEnd(ctx context.Context,
func (h *cbHandler) onChatModelEndWithStreamOutput(ctx context.Context,
_ *callbacks.RunInfo, output *schema.StreamReader[*model.CallbackOutput]) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+3 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
cvt := func(in *model.CallbackOutput) (Message, error) {
return in.Message, nil
@@ -366,6 +475,10 @@ func (h *cbHandler) onChatModelEndWithStreamOutput(ctx context.Context,
func (h *cbHandler) onToolEnd(ctx context.Context,
runInfo *callbacks.RunInfo, output *tool.CallbackOutput) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+4 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
toolCallID := compose.GetToolCallID(ctx)
msg := schema.ToolMessage(output.Response, toolCallID, schema.WithToolName(runInfo.Name))
@@ -386,6 +499,10 @@ func (h *cbHandler) onToolEnd(ctx context.Context,
func (h *cbHandler) onToolEndWithStreamOutput(ctx context.Context,
runInfo *callbacks.RunInfo, output *schema.StreamReader[*tool.CallbackOutput]) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+4 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
toolCallID := compose.GetToolCallID(ctx)
cvt := func(in *tool.CallbackOutput) (Message, error) {
@@ -412,11 +529,19 @@ func (h *cbHandler) sendReturnDirectlyToolEvent() {
}
func (h *cbHandler) onToolsNodeEnd(ctx context.Context, _ *callbacks.RunInfo, _ []*schema.Message) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+3 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
h.sendReturnDirectlyToolEvent()
return ctx
}
func (h *cbHandler) onToolsNodeEndWithStreamOutput(ctx context.Context, _ *callbacks.RunInfo, _ *schema.StreamReader[[]*schema.Message]) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+3 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
h.sendReturnDirectlyToolEvent()
return ctx
}
@@ -432,6 +557,10 @@ func init() {
func (h *cbHandler) onGraphError(ctx context.Context,
_ *callbacks.RunInfo, err error) context.Context {
+ addr := core.GetCurrentAddress(ctx)
+ if len(addr) != len(h.addr)+1 || !addr[:len(h.addr)].Equals(h.addr) {
+ return ctx
+ }
info, ok := compose.ExtractInterruptInfo(err)
if !ok {
@@ -448,21 +577,29 @@ func (h *cbHandler) onGraphError(ctx context.Context,
h.Send(&AgentEvent{AgentName: h.agentName, Err: fmt.Errorf("interrupt has happened, but cannot find interrupt info")})
return ctx
}
- h.Send(&AgentEvent{AgentName: h.agentName, Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: &ChatModelAgentInterruptInfo{Data: data, Info: info},
- },
- }})
+
+ is := FromInterruptContexts(info.InterruptContexts)
+
+ event := CompositeInterrupt(h.ctx, info, data, is)
+ event.Action.Interrupted.Data = &ChatModelAgentInterruptInfo{ // for backward-compatibility with older checkpoints
+ Info: info,
+ Data: data,
+ }
+ event.AgentName = h.agentName
+ h.Send(event)
return ctx
}
-func genReactCallbacks(agentName string,
+func genReactCallbacks(ctx context.Context, agentName string,
generator *AsyncGenerator[*AgentEvent],
enableStreaming bool,
store *mockStore) compose.Option {
- h := &cbHandler{AsyncGenerator: generator, agentName: agentName, store: store, enableStreaming: enableStreaming}
+ h := &cbHandler{
+ ctx: ctx,
+ addr: core.GetCurrentAddress(ctx),
+ AsyncGenerator: generator, agentName: agentName, store: store, enableStreaming: enableStreaming}
cmHandler := &ub.ModelCallbackHandler{
OnEnd: h.onChatModelEnd,
@@ -504,6 +641,14 @@ func errFunc(err error) runFunc {
}
}
+// ChatModelAgentResumeData holds data that can be provided to a ChatModelAgent during a resume operation
+// to modify its behavior. It is provided via the adk.ResumeWithData function.
+type ChatModelAgentResumeData struct {
+ // HistoryModifier is a function that can transform the agent's message history before it is sent to the model.
+ // This allows for adding new information or context upon resumption.
+ HistoryModifier func(ctx context.Context, history []Message) []Message
+}
+
func (a *ChatModelAgent) buildRunFunc(ctx context.Context) runFunc {
a.once.Do(func() {
instruction := a.instruction
@@ -519,7 +664,7 @@ func (a *ChatModelAgent) buildRunFunc(ctx context.Context) runFunc {
transferInstruction := genTransferToAgentInstruction(ctx, transferToAgents)
instruction = concatInstructions(instruction, transferInstruction)
- toolsNodeConf.Tools = append(toolsNodeConf.Tools, &transferToAgent{})
+ toolsNodeConf.Tools = append(toolsNodeConf.Tools, a.transferTool)
returnDirectly[TransferToAgentToolName] = true
}
@@ -534,7 +679,8 @@ func (a *ChatModelAgent) buildRunFunc(ctx context.Context) runFunc {
}
if len(toolsNodeConf.Tools) == 0 {
- a.run = func(ctx context.Context, input *AgentInput, generator *AsyncGenerator[*AgentEvent], store *mockStore, opts ...compose.Option) {
+ a.run = func(ctx context.Context, input *AgentInput, generator *AsyncGenerator[*AgentEvent],
+ store *mockStore, opts ...compose.Option) {
r, err := compose.NewChain[*AgentInput, Message]().
AppendLambda(compose.InvokableLambda(func(ctx context.Context, input *AgentInput) ([]Message, error) {
return a.genModelInput(ctx, instruction, input)
@@ -601,7 +747,8 @@ func (a *ChatModelAgent) buildRunFunc(ctx context.Context) runFunc {
return
}
- a.run = func(ctx context.Context, input *AgentInput, generator *AsyncGenerator[*AgentEvent], store *mockStore, opts ...compose.Option) {
+ a.run = func(ctx context.Context, input *AgentInput, generator *AsyncGenerator[*AgentEvent], store *mockStore,
+ opts ...compose.Option) {
var compileOptions []compose.GraphCompileOption
compileOptions = append(compileOptions,
compose.WithGraphName(a.name),
@@ -623,7 +770,7 @@ func (a *ChatModelAgent) buildRunFunc(ctx context.Context) runFunc {
return
}
- callOpt := genReactCallbacks(a.name, generator, input.EnableStreaming, store)
+ callOpt := genReactCallbacks(ctx, a.name, generator, input.EnableStreaming, store)
var msg Message
var msgStream MessageStream
@@ -683,6 +830,35 @@ func (a *ChatModelAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...A
co := getComposeOptions(opts)
co = append(co, compose.WithCheckPointID(mockCheckPointID))
+ if info.InterruptState == nil {
+ panic(fmt.Sprintf("ChatModelAgent.Resume: agent '%s' was asked to resume but has no state", a.Name(ctx)))
+ }
+
+ stateByte, ok := info.InterruptState.([]byte)
+ if !ok {
+ panic(fmt.Sprintf("ChatModelAgent.Resume: agent '%s' was asked to resume but has invalid interrupt state type: %T",
+ a.Name(ctx), info.InterruptState))
+ }
+
+ if info.ResumeData != nil {
+ resumeData, ok := info.ResumeData.(*ChatModelAgentResumeData)
+ if !ok {
+ panic(fmt.Sprintf("ChatModelAgent.Resume: agent '%s' was asked to resume but has invalid resume data type: %T",
+ a.Name(ctx), info.ResumeData))
+ }
+
+ if resumeData.HistoryModifier != nil {
+ co = append(co, compose.WithStateModifier(func(ctx context.Context, path compose.NodePath, state any) error {
+ s, ok := state.(*State)
+ if !ok {
+ return fmt.Errorf("unexpected state type: %T, expected: %T", state, &State{})
+ }
+ s.Messages = resumeData.HistoryModifier(ctx, s.Messages)
+ return nil
+ }))
+ }
+ }
+
iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
go func() {
defer func() {
@@ -695,7 +871,8 @@ func (a *ChatModelAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...A
generator.Close()
}()
- run(ctx, &AgentInput{EnableStreaming: info.EnableStreaming}, generator, newResumeStore(info.Data.(*ChatModelAgentInterruptInfo).Data), co...)
+ run(ctx, &AgentInput{EnableStreaming: info.EnableStreaming}, generator,
+ newResumeStore(stateByte), co...)
}()
return iterator
diff --git a/adk/chatmodel_test.go b/adk/chatmodel_test.go
index 39333355..056aab7f 100644
--- a/adk/chatmodel_test.go
+++ b/adk/chatmodel_test.go
@@ -203,8 +203,7 @@ func TestChatModelAgentRun(t *testing.T) {
Name: info.Name,
Arguments: `{"name": "test user"}`,
},
- },
- }), nil).
+ }}), nil).
Times(1)
cm.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).
Return(schema.AssistantMessage("Task completed", nil), nil).
@@ -267,7 +266,185 @@ func TestChatModelAgentRun(t *testing.T) {
})
}
-// TestExitTool tests the Exit tool functionality
+// TestConcurrentTransferTool tests the concurrent transfer functionality
+func TestConcurrentTransferTool(t *testing.T) {
+ // Test 1: ConcurrentTransferTool with multiple agents
+ t.Run("MultipleAgents", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a mock chat model that will generate a transfer tool call with multiple agents
+ ctrl := gomock.NewController(t)
+ cm := mockModel.NewMockToolCallingChatModel(ctrl)
+
+ // Set up expectations for the mock model to generate a transfer tool call
+ cm.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).
+ Return(schema.AssistantMessage("", []schema.ToolCall{
+ {
+ ID: "transfer-1",
+ Function: schema.FunctionCall{
+ Name: TransferToAgentToolName,
+ Arguments: `{"agent_names": ["SubAgent1", "SubAgent2"]}`,
+ },
+ },
+ }), nil).
+ Times(1)
+
+ // Model should implement WithTools
+ cm.EXPECT().WithTools(gomock.Any()).Return(cm, nil).AnyTimes()
+
+ // Create sub-agents
+ subAgent1 := createMockAgentForTransferTest("SubAgent1", "First sub-agent")
+ subAgent2 := createMockAgentForTransferTest("SubAgent2", "Second sub-agent")
+
+ // Create agent with ConcurrentTransferTool
+ agent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "TestAgent",
+ Description: "Test agent",
+ Model: cm,
+ TransferTool: &ConcurrentTransferTool{},
+ })
+ assert.NoError(t, err)
+ assert.NotNil(t, agent)
+
+ // Set sub-agents
+ err = agent.OnSetSubAgents(ctx, []Agent{subAgent1, subAgent2})
+ assert.NoError(t, err)
+
+ // Run the agent
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("Transfer this task to multiple agents")},
+ }
+ iterator := agent.Run(ctx, input)
+ assert.NotNil(t, iterator)
+
+ // Collect events
+ var events []*AgentEvent
+ for {
+ event, ok := iterator.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ // Should have at least one event with concurrent transfer action
+ assert.Greater(t, len(events), 0)
+
+ // Find the event with concurrent transfer action
+ var concurrentTransferEvent *AgentEvent
+ for _, event := range events {
+ if event.Action != nil && event.Action.ConcurrentTransferToAgent != nil {
+ concurrentTransferEvent = event
+ break
+ }
+ }
+
+ // Should have found a concurrent transfer event
+ assert.NotNil(t, concurrentTransferEvent)
+
+ // Verify the concurrent transfer action
+ concurrentAction := concurrentTransferEvent.Action.ConcurrentTransferToAgent
+ assert.NotNil(t, concurrentAction)
+ assert.Len(t, concurrentAction.DestAgentNames, 2)
+ assert.Contains(t, concurrentAction.DestAgentNames, "SubAgent1")
+ assert.Contains(t, concurrentAction.DestAgentNames, "SubAgent2")
+ })
+
+ // Test 2: ConcurrentTransferTool with single agent (should still use concurrent action)
+ t.Run("SingleAgent", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a mock chat model that will generate a transfer tool call with single agent
+ ctrl := gomock.NewController(t)
+ cm := mockModel.NewMockToolCallingChatModel(ctrl)
+
+ // Set up expectations for the mock model to generate a transfer tool call
+ cm.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).
+ Return(schema.AssistantMessage("", []schema.ToolCall{
+ {
+ ID: "transfer-1",
+ Function: schema.FunctionCall{
+ Name: TransferToAgentToolName,
+ Arguments: `{"agent_name": "SubAgent"}`,
+ },
+ },
+ }), nil).
+ Times(1)
+
+ // Model should implement WithTools
+ cm.EXPECT().WithTools(gomock.Any()).Return(cm, nil).AnyTimes()
+
+ // Create sub-agent
+ subAgent := createMockAgentForTransferTest("SubAgent", "Test sub-agent")
+
+ // Create agent with ConcurrentTransferTool
+ agent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "TestAgent",
+ Description: "Test agent",
+ Model: cm,
+ TransferTool: &ConcurrentTransferTool{},
+ })
+ assert.NoError(t, err)
+ assert.NotNil(t, agent)
+
+ // Set sub-agent
+ err = agent.OnSetSubAgents(ctx, []Agent{subAgent})
+ assert.NoError(t, err)
+
+ // Run the agent
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("Transfer this task to a single agent")},
+ }
+ iterator := agent.Run(ctx, input)
+ assert.NotNil(t, iterator)
+
+ // Collect events
+ var events []*AgentEvent
+ for {
+ event, ok := iterator.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ // Should have at least one event with concurrent transfer action
+ assert.Greater(t, len(events), 0)
+
+ // Find the event with transfer action
+ var transferEvent *AgentEvent
+ for _, event := range events {
+ if event.Action != nil && event.Action.TransferToAgent != nil {
+ transferEvent = event
+ break
+ }
+ }
+
+ // Should have found a transfer event (not concurrent since it's a single agent)
+ assert.NotNil(t, transferEvent)
+
+ // Verify it's a standard TransferToAgentAction, not ConcurrentTransferToAgentAction
+ assert.NotNil(t, transferEvent.Action.TransferToAgent)
+ assert.Nil(t, transferEvent.Action.ConcurrentTransferToAgent)
+ assert.Equal(t, "SubAgent", transferEvent.Action.TransferToAgent.DestAgentName)
+ })
+}
+
+// Helper function to create mock agents for transfer testing
+func createMockAgentForTransferTest(name, description string) *mockAgentForTool {
+ return newMockAgentForTool(name, description, []*AgentEvent{
+ {
+ AgentName: name,
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ IsStreaming: false,
+ Message: schema.AssistantMessage("Response from "+name, nil),
+ Role: schema.Assistant,
+ },
+ },
+ },
+ })
+}
func TestExitTool(t *testing.T) {
ctx := context.Background()
@@ -434,3 +611,285 @@ func (m *myTool) InvokableRun(ctx context.Context, argumentsInJSON string, opts
time.Sleep(m.waitTime)
return "success", nil
}
+
+// TestChatModelAgentOutputKey tests the outputKey configuration and setOutputToSession function
+func TestChatModelAgentOutputKey(t *testing.T) {
+ // Test outputKey configuration - stores output in session
+ t.Run("OutputKeyStoresInSession", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a mock chat model
+ ctrl := gomock.NewController(t)
+ cm := mockModel.NewMockToolCallingChatModel(ctrl)
+
+ // Set up expectations for the mock model
+ cm.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).
+ Return(schema.AssistantMessage("Hello, I am an AI assistant.", nil), nil).
+ Times(1)
+
+ // Create a ChatModelAgent with outputKey configured
+ agent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "TestAgent",
+ Description: "Test agent for unit testing",
+ Instruction: "You are a helpful assistant.",
+ Model: cm,
+ OutputKey: "agent_output", // This should store output in session
+ })
+ assert.NoError(t, err)
+ assert.NotNil(t, agent)
+
+ // Initialize a run context to enable session storage
+ input := &AgentInput{
+ Messages: []Message{
+ schema.UserMessage("Hello, who are you?"),
+ },
+ }
+ ctx, runCtx := initRunCtx(ctx, "TestAgent", input)
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Run the agent
+ iterator := agent.Run(ctx, input)
+ assert.NotNil(t, iterator)
+
+ // Get the event from the iterator
+ event, ok := iterator.Next()
+ assert.True(t, ok)
+ assert.NotNil(t, event)
+ assert.Nil(t, event.Err)
+
+ // Verify the message content
+ msg := event.Output.MessageOutput.Message
+ assert.Equal(t, "Hello, I am an AI assistant.", msg.Content)
+
+ // Verify that the output was stored in the session
+ time.AfterFunc(100*time.Millisecond, func() {
+ sessionValues := GetSessionValues(ctx)
+ assert.Contains(t, sessionValues, "agent_output")
+ assert.Equal(t, "Hello, I am an AI assistant.", sessionValues["agent_output"])
+ })
+
+ // No more events
+ _, ok = iterator.Next()
+ assert.False(t, ok)
+ })
+
+ // Test outputKey configuration with streaming - stores concatenated output in session
+ t.Run("OutputKeyWithStreamingStoresInSession", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a mock chat model
+ ctrl := gomock.NewController(t)
+ cm := mockModel.NewMockToolCallingChatModel(ctrl)
+
+ // Create a stream reader for the mock response
+ sr := schema.StreamReaderFromArray([]*schema.Message{
+ schema.AssistantMessage("Hello", nil),
+ schema.AssistantMessage(", I am", nil),
+ schema.AssistantMessage(" an AI assistant.", nil),
+ })
+
+ // Set up expectations for the mock model
+ cm.EXPECT().Stream(gomock.Any(), gomock.Any(), gomock.Any()).
+ Return(sr, nil).
+ Times(1)
+
+ // Create a ChatModelAgent with outputKey configured
+ agent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "TestAgent",
+ Description: "Test agent for unit testing",
+ Instruction: "You are a helpful assistant.",
+ Model: cm,
+ OutputKey: "agent_output", // This should store concatenated stream in session
+ })
+ assert.NoError(t, err)
+ assert.NotNil(t, agent)
+
+ // Initialize a run context to enable session storage
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("Hello, who are you?")},
+ EnableStreaming: true,
+ }
+ ctx, runCtx := initRunCtx(ctx, "TestAgent", input)
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Run the agent
+ iterator := agent.Run(ctx, input)
+ assert.NotNil(t, iterator)
+
+ // Get the event from the iterator
+ event, ok := iterator.Next()
+ assert.True(t, ok)
+ assert.NotNil(t, event)
+ assert.Nil(t, event.Err)
+ assert.True(t, event.Output.MessageOutput.IsStreaming)
+
+ time.AfterFunc(100*time.Millisecond, func() {
+ // Verify that the concatenated output was stored in the session
+ sessionValues := GetSessionValues(ctx)
+ assert.Contains(t, sessionValues, "agent_output")
+ assert.Equal(t, "Hello, I am an AI assistant.", sessionValues["agent_output"])
+ })
+
+ // No more events
+ _, ok = iterator.Next()
+ assert.False(t, ok)
+ })
+
+ // Test setOutputToSession function directly - regular message
+ t.Run("SetOutputToSessionRegularMessage", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Initialize a run context to enable session storage
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("test")},
+ }
+ ctx, runCtx := initRunCtx(ctx, "TestAgent", input)
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Test with a regular message
+ msg := schema.AssistantMessage("Test response", nil)
+ err := setOutputToSession(ctx, msg, nil, "test_output")
+ assert.NoError(t, err)
+
+ // Verify the message content was stored
+ sessionValues := GetSessionValues(ctx)
+ assert.Contains(t, sessionValues, "test_output")
+ assert.Equal(t, "Test response", sessionValues["test_output"])
+ })
+
+ // Test setOutputToSession function directly - streaming message
+ t.Run("SetOutputToSessionStreamingMessage", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Initialize a run context to enable session storage
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("test")},
+ }
+ ctx, runCtx := initRunCtx(ctx, "TestAgent", input)
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Test with a streaming message
+ sr := schema.StreamReaderFromArray([]*schema.Message{
+ schema.AssistantMessage("Stream", nil),
+ schema.AssistantMessage(" response", nil),
+ schema.AssistantMessage(" content", nil),
+ })
+ err := setOutputToSession(ctx, nil, sr, "test_output")
+ assert.NoError(t, err)
+
+ // Verify the concatenated stream content was stored
+ sessionValues := GetSessionValues(ctx)
+ assert.Contains(t, sessionValues, "test_output")
+ assert.Equal(t, "Stream response content", sessionValues["test_output"])
+ })
+
+ // Test setOutputToSession function directly - error case
+ t.Run("SetOutputToSessionErrorCase", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Initialize a run context to enable session storage
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("test")},
+ }
+ ctx, runCtx := initRunCtx(ctx, "TestAgent", input)
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Test with an invalid stream (simulate error)
+ // Create a stream that will fail when concatenated
+ sr := schema.StreamReaderFromArray([]*schema.Message{
+ schema.AssistantMessage("test", nil),
+ })
+ // Close the stream to simulate an error condition
+ sr.Close()
+
+ // This should return an error because the stream is closed
+ err := setOutputToSession(ctx, nil, sr, "test_output")
+ // Note: The actual behavior may vary depending on the stream implementation
+ // Some streams may not error when closed, so we'll accept either outcome
+ if err != nil {
+ // If there's an error, verify nothing was stored
+ sessionValues := GetSessionValues(ctx)
+ assert.NotContains(t, sessionValues, "test_output")
+ } else {
+ // If no error, verify the content was stored
+ sessionValues := GetSessionValues(ctx)
+ assert.Contains(t, sessionValues, "test_output")
+ assert.Equal(t, "test", sessionValues["test_output"])
+ }
+ })
+
+ // Test outputKey with React workflow (tools enabled)
+ t.Run("OutputKeyWithReactWorkflow", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a mock chat model
+ ctrl := gomock.NewController(t)
+ cm := mockModel.NewMockToolCallingChatModel(ctrl)
+
+ // Create a simple tool for testing
+ fakeTool := &fakeToolForTest{
+ tarCount: 1,
+ }
+
+ // Set up expectations for the mock model - it will generate a final response
+ cm.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).
+ Return(schema.AssistantMessage("Final response from React workflow", nil), nil).
+ Times(1)
+ // Model should implement WithTools
+ cm.EXPECT().WithTools(gomock.Any()).Return(cm, nil).AnyTimes()
+
+ // Create a ChatModelAgent with outputKey and tools configured
+ agent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "TestAgent",
+ Description: "Test agent with tools",
+ Instruction: "You are a helpful assistant.",
+ Model: cm,
+ OutputKey: "agent_output",
+ ToolsConfig: ToolsConfig{
+ ToolsNodeConfig: compose.ToolsNodeConfig{
+ Tools: []tool.BaseTool{fakeTool},
+ },
+ },
+ })
+ assert.NoError(t, err)
+ assert.NotNil(t, agent)
+
+ // Initialize a run context to enable session storage
+ input := &AgentInput{
+ Messages: []Message{schema.UserMessage("Use the tool")},
+ }
+ ctx, runCtx := initRunCtx(ctx, "TestAgent", input)
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Run the agent
+ iterator := agent.Run(ctx, input)
+ assert.NotNil(t, iterator)
+
+ // Get the event from the iterator
+ event, ok := iterator.Next()
+ assert.True(t, ok)
+ assert.NotNil(t, event)
+ assert.Nil(t, event.Err)
+
+ // Verify the message content
+ msg := event.Output.MessageOutput.Message
+ assert.Equal(t, "Final response from React workflow", msg.Content)
+
+ // Verify that the output was stored in the session
+ time.AfterFunc(time.Millisecond*10, func() {
+ sessionValues := GetSessionValues(ctx)
+ assert.Contains(t, sessionValues, "agent_output")
+ assert.Equal(t, "Final response from React workflow", sessionValues["agent_output"])
+ })
+
+ // No more events
+ _, ok = iterator.Next()
+ assert.False(t, ok)
+ })
+}
diff --git a/adk/deterministic_transfer.go b/adk/deterministic_transfer.go
index 8cbb8021..5d7c51e8 100644
--- a/adk/deterministic_transfer.go
+++ b/adk/deterministic_transfer.go
@@ -24,7 +24,19 @@ import (
"github.com/cloudwego/eino/schema"
)
-func AgentWithDeterministicTransferTo(_ context.Context, config *DeterministicTransferConfig) Agent {
+func AgentWithDeterministicTransferTo(ctx context.Context, config *DeterministicTransferConfig) Agent {
+ a := config.Agent
+
+ fa, ok := a.(*flowAgent)
+ if ok {
+ a = AgentWithDeterministicTransferTo(ctx, &DeterministicTransferConfig{
+ Agent: fa.Agent,
+ ToAgentNames: config.ToAgentNames,
+ })
+ fa.Agent = a
+ return fa
+ }
+
if ra, ok := config.Agent.(ResumableAgent); ok {
return &resumableAgentWithDeterministicTransferTo{
agent: ra,
@@ -53,10 +65,6 @@ func (a *agentWithDeterministicTransferTo) Name(ctx context.Context) string {
func (a *agentWithDeterministicTransferTo) Run(ctx context.Context,
input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- if _, ok := a.agent.(*flowAgent); ok {
- ctx = ClearRunCtx(ctx)
- }
-
aIter := a.agent.Run(ctx, input, options...)
iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
@@ -80,11 +88,6 @@ func (a *resumableAgentWithDeterministicTransferTo) Name(ctx context.Context) st
func (a *resumableAgentWithDeterministicTransferTo) Run(ctx context.Context,
input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
-
- if _, ok := a.agent.(*flowAgent); ok {
- ctx = ClearRunCtx(ctx)
- }
-
aIter := a.agent.Run(ctx, input, options...)
iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
diff --git a/adk/flow.go b/adk/flow.go
index 80dd50fd..a0acf146 100644
--- a/adk/flow.go
+++ b/adk/flow.go
@@ -22,8 +22,9 @@ import (
"fmt"
"runtime/debug"
"strings"
+ "sync"
- "github.com/cloudwego/eino/compose"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/internal/safe"
"github.com/cloudwego/eino/schema"
)
@@ -36,6 +37,56 @@ type HistoryEntry struct {
type HistoryRewriter func(ctx context.Context, entries []*HistoryEntry) ([]Message, error)
+type flowInterruptState struct {
+ // Maps the destination agent name to the events generated in its lane before interruption.
+ // This also serves as the source of truth for which lanes need to be resumed.
+ LaneEvents map[string][]*agentEventWrapper
+}
+
+// collectLaneEvents collects events from child contexts following runParallel pattern
+func (a *flowAgent) collectLaneEvents(childContexts []context.Context, agentNames []string) map[string][]*agentEventWrapper {
+ laneEvents := make(map[string][]*agentEventWrapper)
+
+ for i, childCtx := range childContexts {
+ childRunCtx := getRunCtx(childCtx)
+ if childRunCtx != nil && childRunCtx.Session != nil && childRunCtx.Session.LaneEvents != nil {
+ // Use the provided agent names for reliable mapping
+ agentName := agentNames[i]
+
+ // COPY events before storing (streams can only be consumed once)
+ laneEvents[agentName] = make([]*agentEventWrapper, len(childRunCtx.Session.LaneEvents.Events))
+ for j, event := range childRunCtx.Session.LaneEvents.Events {
+ copied := copyAgentEvent(event.AgentEvent)
+ setAutomaticClose(copied)
+ laneEvents[agentName][j] = &agentEventWrapper{
+ AgentEvent: copied,
+ }
+ }
+ }
+ }
+
+ return laneEvents
+}
+
+// createCompositeInterrupt creates a composite interrupt event with the collected state
+func (a *flowAgent) createCompositeInterrupt(ctx context.Context, laneEvents map[string][]*agentEventWrapper, subInterruptSignals []*core.InterruptSignal) *AgentEvent {
+ state := &flowInterruptState{
+ LaneEvents: laneEvents,
+ }
+
+ event := CompositeInterrupt(ctx, "Concurrent transfer interrupted", state, subInterruptSignals...)
+
+ // Set agent name and run path for proper identification
+ event.AgentName = a.Name(ctx)
+ event.RunPath = getRunCtx(ctx).RunPath
+
+ return event
+}
+
+func init() {
+ schema.RegisterName[*flowInterruptState]("eino_adk_dynamic_parallel_state")
+}
+
type flowAgent struct {
Agent
@@ -45,7 +96,7 @@ type flowAgent struct {
disallowTransferToParent bool
historyRewriter HistoryRewriter
- checkPointStore compose.CheckPointStore
+ selfReturnAfterTransfer bool
}
func (a *flowAgent) deepCopy() *flowAgent {
@@ -55,7 +106,7 @@ func (a *flowAgent) deepCopy() *flowAgent {
parentAgent: a.parentAgent,
disallowTransferToParent: a.disallowTransferToParent,
historyRewriter: a.historyRewriter,
- checkPointStore: a.checkPointStore,
+ selfReturnAfterTransfer: a.selfReturnAfterTransfer,
}
for _, sa := range a.subAgents {
@@ -82,6 +133,25 @@ func WithHistoryRewriter(h HistoryRewriter) AgentOption {
}
}
+// WithSelfReturnAfterTransfer returns an AgentOption that enables self-return behavior
+// after a transfer operation completes. When this option is set, the agent will
+// automatically return control to itself after all sub-agents have finished executing.
+//
+// This is particularly useful for supervisor agents that need to process the results
+// of concurrent transfers or perform additional operations after sub-agent execution.
+//
+// Example usage:
+//
+// agent := toFlowAgent(ctx, baseAgent, WithSelfReturnAfterTransfer())
+//
+// Without this option, the agent's execution ends after the transfer completes.
+// With this option, the agent resumes execution to handle the aggregated results.
+func WithSelfReturnAfterTransfer() AgentOption {
+ return func(fa *flowAgent) {
+ fa.selfReturnAfterTransfer = true
+ }
+}
+
func toFlowAgent(ctx context.Context, agent Agent, opts ...AgentOption) *flowAgent {
var fa *flowAgent
var ok bool
@@ -161,20 +231,6 @@ func (a *flowAgent) getAgent(ctx context.Context, name string) *flowAgent {
return nil
}
-func belongToRunPath(eventRunPath []RunStep, runPath []RunStep) bool {
- if len(runPath) < len(eventRunPath) {
- return false
- }
-
- for i, step := range eventRunPath {
- if !runPath[i].Equals(step) {
- return false
- }
- }
-
- return true
-}
-
func rewriteMessage(msg Message, agentName string) Message {
var sb strings.Builder
sb.WriteString("For context:")
@@ -207,6 +263,9 @@ func genMsg(entry *HistoryEntry, agentName string) (Message, error) {
}
func (ai *AgentInput) deepCopy() *AgentInput {
+ if ai == nil {
+ return nil
+ }
copied := &AgentInput{
Messages: make([]Message, len(ai.Messages)),
EnableStreaming: ai.EnableStreaming,
@@ -219,7 +278,6 @@ func (ai *AgentInput) deepCopy() *AgentInput {
func (a *flowAgent) genAgentInput(ctx context.Context, runCtx *runContext, skipTransferMessages bool) (*AgentInput, error) {
input := runCtx.RootInput.deepCopy()
- runPath := runCtx.RunPath
events := runCtx.Session.getEvents()
historyEntries := make([]*HistoryEntry, 0)
@@ -232,10 +290,6 @@ func (a *flowAgent) genAgentInput(ctx context.Context, runCtx *runContext, skipT
}
for _, event := range events {
- if !belongToRunPath(event.RunPath, runPath) {
- continue
- }
-
if skipTransferMessages && event.Action != nil && event.Action.TransferToAgent != nil {
// If skipTransferMessages is true and the event contain transfer action, the message in this event won't be appended to history entries.
if event.Output != nil &&
@@ -297,7 +351,9 @@ func buildDefaultHistoryRewriter(agentName string) HistoryRewriter {
func (a *flowAgent) Run(ctx context.Context, input *AgentInput, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
agentName := a.Name(ctx)
- ctx, runCtx := initRunCtx(ctx, agentName, input)
+ var runCtx *runContext
+ ctx, runCtx = initRunCtx(ctx, agentName, input)
+ ctx = AppendAddressSegment(ctx, AddressSegmentAgent, agentName)
o := getCommonOptions(nil, opts...)
@@ -320,41 +376,45 @@ func (a *flowAgent) Run(ctx context.Context, input *AgentInput, opts ...AgentRun
}
func (a *flowAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- runCtx := getRunCtx(ctx)
- if runCtx == nil {
- return genErrorIter(fmt.Errorf("failed to resume agent: run context is empty"))
- }
+ ctx, info = buildResumeInfo(ctx, a.Name(ctx), info)
+
+ if info.WasInterrupted {
+ // Check if we need to resume concurrent transfers
+ if info.InterruptState != nil {
+ state, ok := info.InterruptState.(*flowInterruptState)
+ if ok {
+ // Delegate to resumeConcurrentLanes which will handle the type assertion
+ return a.resumeConcurrentLanes(ctx, state, info, opts...)
+ }
+ }
- agentName := a.Name(ctx)
- targetName := agentName
- if len(runCtx.RunPath) > 0 {
- targetName = runCtx.RunPath[len(runCtx.RunPath)-1].agentName
- }
+ ra, ok := a.Agent.(ResumableAgent)
+ if !ok {
+ return genErrorIter(fmt.Errorf("failed to resume agent: agent '%s' is an interrupt point "+
+ "but is not a ResumableAgent", a.Name(ctx)))
+ }
- if agentName != targetName {
- // go to target flow agent
- targetAgent := recursiveGetAgent(ctx, a, targetName)
- if targetAgent == nil {
- return genErrorIter(fmt.Errorf("failed to resume agent: cannot find agent: %s", agentName))
+ iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ aIter := ra.Resume(ctx, info, opts...)
+ if _, ok := ra.(*workflowAgent); ok {
+ return aIter
}
- return targetAgent.Resume(ctx, info, opts...)
+ go a.run(ctx, getRunCtx(ctx), aIter, generator, opts...)
+ return iterator
}
- if wf, ok := a.Agent.(*workflowAgent); ok {
- return wf.Resume(ctx, info, opts...)
+ nextAgentName, err := getNextResumeAgent(ctx, info)
+ if err != nil {
+ return genErrorIter(err)
}
- // resume current agent
- ra, ok := a.Agent.(ResumableAgent)
- if !ok {
- return genErrorIter(fmt.Errorf("failed to resume agent: target agent[%s] isn't resumable", agentName))
+ subAgent := a.getAgent(ctx, nextAgentName)
+ if subAgent == nil {
+ return genErrorIter(fmt.Errorf("failed to resume agent: agent '%s' not found", nextAgentName))
}
- iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
- aIter := ra.Resume(ctx, info, opts...)
-
- go a.run(ctx, runCtx, aIter, generator, opts...)
- return iterator
+ return subAgent.Resume(ctx, info, opts...)
}
type DeterministicTransferConfig struct {
@@ -378,7 +438,11 @@ func (a *flowAgent) run(
generator.Close()
}()
- var lastAction *AgentAction
+ // Collect all actions to apply precedence rules
+ var interruptAction *AgentEvent
+ var exitAction *AgentEvent
+ var transferActions []*TransferToAgentAction
+
for {
event, ok := aIter.Next()
if !ok {
@@ -387,6 +451,33 @@ func (a *flowAgent) run(
event.AgentName = a.Name(ctx)
event.RunPath = runCtx.RunPath
+
+ // Apply Action Precedence: Interrupt > Exit > Transfer
+ if event.Action != nil {
+ if event.Action.Interrupted != nil {
+ if interruptAction == nil {
+ interruptAction = event
+ }
+ } else if event.Action.Exit {
+ if interruptAction == nil {
+ exitAction = event
+ }
+ } else if event.Action.TransferToAgent != nil {
+ if interruptAction == nil && exitAction == nil {
+ transferActions = append(transferActions, event.Action.TransferToAgent)
+ }
+ } else if event.Action.ConcurrentTransferToAgent != nil {
+ if interruptAction == nil && exitAction == nil {
+ // Convert concurrent transfer action to individual transfer actions
+ for _, destName := range event.Action.ConcurrentTransferToAgent.DestAgentNames {
+ transferActions = append(transferActions, &TransferToAgentAction{DestAgentName: destName})
+ }
+ }
+ }
+ }
+
+ // Always send the event to the generator for immediate consumption
+ // but only add non-interrupt events to the session
if event.Action == nil || event.Action.Interrupted == nil {
// copy the event so that the copied event's stream is exclusive for any potential consumer
// copy before adding to session because once added to session it's stream could be consumed by genAgentInput at any time
@@ -397,65 +488,253 @@ func (a *flowAgent) run(
setAutomaticClose(event)
runCtx.Session.addEvent(copied)
}
- lastAction = event.Action
generator.Send(event)
}
- var destName string
- if lastAction != nil {
- if lastAction.Interrupted != nil {
- appendInterruptRunCtx(ctx, runCtx)
- return
- }
- if lastAction.Exit {
+ if interruptAction != nil || exitAction != nil || len(transferActions) == 0 {
+ return
+ }
+
+ // Handle transfers based on count
+ if len(transferActions) == 1 {
+ agentToRun, err := a.getAgentFromTransferAction(ctx, transferActions[0])
+ if err != nil {
+ generator.Send(&AgentEvent{Err: err})
return
}
- if lastAction.TransferToAgent != nil {
- destName = lastAction.TransferToAgent.DestAgentName
+ if a.selfReturnAfterTransfer {
+ agentToRun = AgentWithDeterministicTransferTo(ctx, &DeterministicTransferConfig{
+ Agent: agentToRun,
+ ToAgentNames: []string{a.Name(ctx)},
+ }).(*flowAgent)
}
+
+ subAIter := agentToRun.Run(ctx, nil /*subagents get input from runCtx*/, opts...)
+ generator.pipeAll(subAIter)
+
+ return
}
- // handle transferring to another agent
- if destName != "" {
- agentToRun := a.getAgent(ctx, destName)
- if agentToRun == nil {
- e := errors.New(fmt.Sprintf(
- "transfer failed: agent '%s' not found when transferring from '%s'",
- destName, a.Name(ctx)))
- generator.Send(&AgentEvent{Err: e})
+ // Multiple transfers - execute concurrently
+ agents := make([]Agent, len(transferActions))
+ for i, action := range transferActions {
+ agentToRun, err := a.getAgentFromTransferAction(ctx, action)
+ if err != nil {
+ generator.Send(&AgentEvent{Err: err})
return
}
+ agents[i] = agentToRun
+ }
+ iterator := a.runConcurrentLanes(ctx, agents, opts...)
+ generator.pipeAll(iterator)
+}
- subAIter := agentToRun.Run(ctx, nil /*subagents get input from runCtx*/, opts...)
- for {
- subEvent, ok_ := subAIter.Next()
- if !ok_ {
- break
- }
+func (a *flowAgent) getAgentFromTransferAction(ctx context.Context, action *TransferToAgentAction) (*flowAgent, error) {
+ sub := a.getAgent(ctx, action.DestAgentName)
+ if sub == nil {
+ return nil, fmt.Errorf("transfer failed: agent '%s' not found when transferring from '%s'",
+ action.DestAgentName, a.Name(ctx))
+ }
+ return sub, nil
+}
- setAutomaticClose(subEvent)
- generator.Send(subEvent)
+// runConcurrentLanes executes multiple agents concurrently using a fork-join model
+func (a *flowAgent) runConcurrentLanes(
+ ctx context.Context,
+ agents []Agent,
+ opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
+ defer generator.Close()
+
+ agentExecutors := make([]func(context.Context) *AsyncIterator[*AgentEvent], len(agents))
+ childContexts := make([]context.Context, len(agents))
+ agentNames := make([]string, len(agents))
+
+ for i := range agents {
+ subAgent := agents[i]
+ agentNames[i] = subAgent.Name(ctx)
+ childContexts[i] = forkRunCtx(ctx)
+ agentExecutors[i] = func(ctx2 context.Context) *AsyncIterator[*AgentEvent] {
+ return subAgent.Run(ctx2, nil, opts...)
}
}
+
+ a.concurrentLaneExecution(ctx, agentExecutors, agentNames, childContexts, generator, opts...)
+ return iterator
}
-func recursiveGetAgent(ctx context.Context, agent *flowAgent, agentName string) *flowAgent {
- if agent == nil {
- return nil
+// resumeConcurrentLanes resumes execution after a concurrent transfer interruption
+func (a *flowAgent) resumeConcurrentLanes(
+ ctx context.Context,
+ state *flowInterruptState,
+ info *ResumeInfo,
+ opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+
+ iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
+ defer generator.Close()
+
+ // Create child contexts for each lane (using LaneEvents as source of truth)
+ // We need to preserve the order, so we'll create a slice of agent names
+ agentNamesInOrder := make([]string, 0, len(state.LaneEvents))
+ for destAgentName := range state.LaneEvents {
+ agentNamesInOrder = append(agentNamesInOrder, destAgentName)
+ }
+
+ agents := make([]*flowAgent, len(agentNamesInOrder))
+ for i, agentName := range agentNamesInOrder {
+ agents[i] = a.getAgent(ctx, agentName)
+ if agents[i] == nil {
+ generator.Send(&AgentEvent{Err: fmt.Errorf("transfer failed: agent '%s' not found", agentNamesInOrder[i])})
+ return iterator
+ }
}
- if agent.Name(ctx) == agentName {
- return agent
+
+ // Get the next resume agents from the interrupt context (following parallel workflow pattern)
+ agentNames, err := getNextResumeAgents(ctx, info)
+ if err != nil {
+ generator.Send(&AgentEvent{Err: err})
+ return iterator
}
- a := agent.getAgent(ctx, agentName)
- if a != nil {
- return a
+
+ childContexts := make([]context.Context, len(agentNamesInOrder))
+
+ // Fork contexts for each lane (following parallel workflow pattern)
+ for i, destAgentName := range agentNamesInOrder {
+ childContexts[i] = forkRunCtx(ctx)
+
+ // Add existing events to the child context
+ if existingEvents, ok := state.LaneEvents[destAgentName]; ok {
+ childRunCtx := getRunCtx(childContexts[i])
+ if childRunCtx != nil && childRunCtx.Session != nil {
+ if childRunCtx.Session.LaneEvents == nil {
+ childRunCtx.Session.LaneEvents = &laneEvents{}
+ }
+ childRunCtx.Session.LaneEvents.Events = append(childRunCtx.Session.LaneEvents.Events, existingEvents...)
+ }
+ }
}
- for _, sa := range agent.subAgents {
- a = recursiveGetAgent(ctx, sa, agentName)
- if a != nil {
- return a
+
+ // Prepare agent executors for concurrent execution
+ agentExecutors := make([]func(context.Context) *AsyncIterator[*AgentEvent], len(agentNamesInOrder))
+
+ for i := range agentNamesInOrder {
+ name := agentNamesInOrder[i]
+ agentToRun := agents[i]
+ agentExecutors[i] = func(ctx2 context.Context) *AsyncIterator[*AgentEvent] {
+ // Check if this agent needs to be resumed (following parallel workflow pattern)
+ if _, ok := agentNames[name]; ok {
+ // This branch was interrupted and needs to be resumed
+ return agentToRun.Resume(ctx2, &ResumeInfo{
+ EnableStreaming: info.EnableStreaming,
+ InterruptInfo: info.InterruptInfo,
+ }, opts...)
+ } else {
+ // We are resuming, but this child is not in the next points map.
+ // This means it finished successfully, so we don't run it.
+ return nil
+ }
}
}
- return nil
+
+ // Execute all agents concurrently using shared logic, using pre-created child contexts
+ a.concurrentLaneExecution(ctx, agentExecutors, agentNamesInOrder, childContexts, generator, opts...)
+
+ return iterator
+}
+
+// concurrentLaneExecution handles the core logic for executing multiple agents concurrently
+// This is shared between runConcurrentLanes and resumeConcurrentLanes
+func (a *flowAgent) concurrentLaneExecution(
+ ctx context.Context,
+ agentExecutors []func(context.Context) *AsyncIterator[*AgentEvent],
+ agentNames []string,
+ childContexts []context.Context,
+ generator *AsyncGenerator[*AgentEvent],
+ opts ...AgentRunOption) {
+
+ var (
+ wg sync.WaitGroup
+ mu sync.Mutex
+ )
+
+ subInterruptSignals := make([]*core.InterruptSignal, 0)
+
+ // Launch concurrent execution for each agent
+ for i := range agentExecutors {
+ exec := agentExecutors[i]
+ childRunCtx := childContexts[i]
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+
+ subAIter := exec(childRunCtx)
+ if subAIter == nil {
+ return
+ }
+
+ for {
+ subEvent, ok := subAIter.Next()
+ if !ok {
+ break
+ }
+
+ // Check for interrupt action
+ if subEvent.Action != nil && subEvent.Action.internalInterrupted != nil {
+ mu.Lock()
+ subInterruptSignals = append(subInterruptSignals, subEvent.Action.internalInterrupted)
+ mu.Unlock()
+
+ // Stop processing this lane when interrupted
+ return
+ }
+
+ generator.Send(subEvent)
+ }
+ }()
+ }
+
+ // Wait for all concurrent lanes to complete
+ wg.Wait()
+
+ if len(subInterruptSignals) == 0 {
+ joinRunCtxs(ctx, childContexts...)
+
+ if a.selfReturnAfterTransfer {
+ a.doSelfReturnAfterTransfer(ctx, generator, opts...)
+ }
+ return
+ }
+
+ // Collect events from child contexts if any lanes were interrupted
+ var laneEvents map[string][]*agentEventWrapper
+ if len(subInterruptSignals) > 0 {
+ laneEvents = a.collectLaneEvents(childContexts, agentNames)
+ }
+
+ // Create composite interrupt with the collected state
+ event := a.createCompositeInterrupt(ctx, laneEvents, subInterruptSignals)
+ generator.Send(event)
+}
+
+func (a *flowAgent) doSelfReturnAfterTransfer(ctx context.Context,
+ generator *AsyncGenerator[*AgentEvent], opts ...AgentRunOption) {
+ target := a.Name(ctx)
+ runCtx := getRunCtx(ctx)
+ aMsg, tMsg := GenTransferMessages(ctx, target)
+ aEvent := EventFromMessage(aMsg, nil, schema.Assistant, "")
+ aEvent.AgentName = a.Name(ctx)
+ aEvent.RunPath = runCtx.RunPath
+ generator.Send(aEvent)
+ tEvent := EventFromMessage(tMsg, nil, schema.Tool, tMsg.ToolName)
+ tEvent.Action = &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: target,
+ },
+ }
+ tEvent.AgentName = a.Name(ctx)
+ tEvent.RunPath = runCtx.RunPath
+ generator.Send(tEvent)
+ iter := a.Run(ctx, nil, opts...)
+ generator.pipeAll(iter)
}
diff --git a/adk/flow_test.go b/adk/flow_test.go
index b1b3941c..912feb0d 100644
--- a/adk/flow_test.go
+++ b/adk/flow_test.go
@@ -18,7 +18,9 @@ package adk
import (
"context"
+ "strings"
"testing"
+ "time"
"github.com/stretchr/testify/assert"
"go.uber.org/mock/gomock"
@@ -27,7 +29,6 @@ import (
"github.com/cloudwego/eino/schema"
)
-// TestTransferToAgent tests the TransferToAgent functionality
func TestTransferToAgent(t *testing.T) {
ctx := context.Background()
@@ -98,6 +99,7 @@ func TestTransferToAgent(t *testing.T) {
schema.UserMessage("Please transfer this to the child agent"),
},
}
+ ctx, _ = initRunCtx(ctx, flowAgent.Name(ctx), input)
iterator := flowAgent.Run(ctx, input)
assert.NotNil(t, iterator)
@@ -142,3 +144,518 @@ func TestTransferToAgent(t *testing.T) {
_, ok = iterator.Next()
assert.False(t, ok)
}
+
+// TestNestedConcurrentTransferWithMixedSuccessInterruptResume tests nested concurrent transfers with mixed success/interrupt and resume
+func TestNestedConcurrentTransferWithMixedSuccessInterruptResume(t *testing.T) {
+ ctx := context.Background()
+
+ // Create grandchild agents with different behaviors
+ grandchild1 := &myAgent{
+ name: "Grandchild1",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Grandchild1 emits normal message first, then interrupts
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild1 processing", nil),
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild1 interrupted", nil),
+ },
+ },
+ })
+
+ intEvent := Interrupt(ctx, "Grandchild1 interrupted")
+ generator.Send(intEvent)
+ generator.Close()
+ return iter
+ },
+ resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Verify we can access resume data
+ if info != nil && info.ResumeData != nil {
+ resumeData := info.ResumeData.(string)
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Resume data: "+resumeData, nil),
+ },
+ },
+ })
+ }
+
+ // Verify event visibility using run context
+ runCtx := getRunCtx(ctx)
+ if runCtx != nil && runCtx.Session != nil {
+ events := runCtx.Session.getEvents()
+ // Should see events from parent lane but not sibling lanes
+ var grandchild1Events, parentEvents, siblingEvents []string
+ for _, event := range events {
+ if event.AgentName == "Grandchild1" {
+ grandchild1Events = append(grandchild1Events, event.Output.MessageOutput.Message.Content)
+ } else if event.AgentName == "Child1" {
+ if event.Output != nil {
+ parentEvents = append(parentEvents, event.Output.MessageOutput.Message.Content)
+ }
+ } else if event.AgentName == "Grandchild2" || event.AgentName == "Grandchild3" {
+ // These are sibling lane events that should NOT be visible
+ siblingEvents = append(siblingEvents, event.Output.MessageOutput.Message.Content)
+ }
+ }
+
+ // Verify we can see our own events
+ if len(grandchild1Events) > 0 {
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Saw my events: "+strings.Join(grandchild1Events, ", "), nil),
+ },
+ },
+ })
+ }
+
+ // Verify we can see parent events
+ if len(parentEvents) > 0 {
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Saw parent events: "+strings.Join(parentEvents, ", "), nil),
+ },
+ },
+ })
+ }
+
+ // Verify we CANNOT see sibling lane events
+ if len(siblingEvents) == 0 {
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Correctly cannot see sibling events", nil),
+ },
+ },
+ })
+ } else {
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("ERROR: Should not see sibling events: "+strings.Join(siblingEvents, ", "), nil),
+ },
+ },
+ })
+ }
+ }
+
+ // When resumed, Grandchild1 completes
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild1 resumed and completed", nil),
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ grandchild2 := &myAgent{
+ name: "Grandchild2",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Grandchild2 emits normal message first, then completes
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild2",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild2 processing", nil),
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild2",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild2 completed", nil),
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ grandchild3 := &myAgent{
+ name: "Grandchild3",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Grandchild3 emits normal message first, then completes
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild3",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild3 processing", nil),
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Grandchild3",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Grandchild3 completed", nil),
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ // Create child agents that transfer to grandchildren with different behaviors
+ child1 := &myAgent{
+ name: "Child1",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Child1 emits normal message first
+ generator.Send(&AgentEvent{
+ AgentName: "Child1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Child1 processing transfers", nil),
+ },
+ },
+ })
+
+ // Transfer to grandchildren concurrently
+ generator.Send(&AgentEvent{
+ AgentName: "Child1",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "Grandchild1",
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Child1",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "Grandchild2",
+ },
+ },
+ })
+
+ generator.Close()
+ return iter
+ },
+ }
+
+ child2 := &myAgent{
+ name: "Child2",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Child2 emits normal message first
+ generator.Send(&AgentEvent{
+ AgentName: "Child2",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Child2 processing transfer", nil),
+ },
+ },
+ })
+
+ // Child2 transfers to Grandchild3
+ generator.Send(&AgentEvent{
+ AgentName: "Child2",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "Grandchild3",
+ },
+ },
+ })
+
+ generator.Close()
+ return iter
+ },
+ }
+
+ child3 := &myAgent{
+ name: "Child3",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Child3 emits normal message first, then completes
+ generator.Send(&AgentEvent{
+ AgentName: "Child3",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Child3 processing", nil),
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Child3",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Child3 completed", nil),
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ // Create parent agent
+ parent := &myAgent{
+ name: "Parent",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Send initial message
+ generator.Send(&AgentEvent{
+ AgentName: "Parent",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.AssistantMessage("Starting nested concurrent transfers", nil),
+ },
+ },
+ })
+
+ // Transfer to children concurrently
+ generator.Send(&AgentEvent{
+ AgentName: "Parent",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "Child1",
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Parent",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "Child2",
+ },
+ },
+ })
+
+ generator.Send(&AgentEvent{
+ AgentName: "Parent",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "Child3",
+ },
+ },
+ })
+
+ generator.Close()
+ return iter
+ },
+ }
+
+ // Create nested flow agent hierarchy
+ child1WithGrandchildren, err := SetSubAgents(ctx, child1, []Agent{grandchild1, grandchild2})
+ assert.NoError(t, err)
+
+ child2WithGrandchild, err := SetSubAgents(ctx, child2, []Agent{grandchild3})
+ assert.NoError(t, err)
+
+ parentWithChildren, err := SetSubAgents(ctx, parent, []Agent{child1WithGrandchildren, child2WithGrandchild, child3})
+ assert.NoError(t, err)
+
+ // Create runner with checkpoint store
+ store := newMyStore()
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: parentWithChildren,
+ CheckPointStore: store,
+ })
+
+ // First run - should interrupt at Grandchild1
+ iter := runner.Query(ctx, "Test nested concurrent transfer with mixed success/interrupt", WithCheckPointID("nested-mixed-1"))
+
+ // Collect events until interrupt
+ var events []*AgentEvent
+ var interruptEvent *AgentEvent
+
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ if event == nil {
+ break
+ }
+ events = append(events, event)
+
+ if event.Action != nil && event.Action.Interrupted != nil {
+ interruptEvent = event
+ break
+ }
+ }
+
+ // Verify we got an interrupt event
+ if interruptEvent == nil {
+ t.Fatal("Should have received an interrupt event")
+ }
+ assert.Equal(t, "Parent", interruptEvent.AgentName, "Interrupt should come from parent")
+
+ // Verify we have events from all agents before the interrupt
+ var parentEvents, child1Events, child2Events, child3Events, grandchild1Events, grandchild2Events, grandchild3Events []*AgentEvent
+ for _, event := range events {
+ switch event.AgentName {
+ case "Parent":
+ parentEvents = append(parentEvents, event)
+ case "Child1":
+ child1Events = append(child1Events, event)
+ case "Child2":
+ child2Events = append(child2Events, event)
+ case "Child3":
+ child3Events = append(child3Events, event)
+ case "Grandchild1":
+ grandchild1Events = append(grandchild1Events, event)
+ case "Grandchild2":
+ grandchild2Events = append(grandchild2Events, event)
+ case "Grandchild3":
+ grandchild3Events = append(grandchild3Events, event)
+ }
+ }
+
+ // Parent should have sent initial message and transfer events
+ assert.Equal(t, 5, len(parentEvents), "Parent should have initial message + 3 transfer events")
+ assert.Equal(t, "Starting nested concurrent transfers", parentEvents[0].Output.MessageOutput.Message.Content)
+
+ // Child1 should have normal message and transfer events
+ assert.Equal(t, 3, len(child1Events), "Child1 should have processing message + 2 transfer events")
+ assert.Equal(t, "Child1 processing transfers", child1Events[0].Output.MessageOutput.Message.Content)
+
+ // Child2 should have normal message and transfer event
+ assert.Equal(t, 2, len(child2Events), "Child2 should have processing message + 1 transfer event")
+ assert.Equal(t, "Child2 processing transfer", child2Events[0].Output.MessageOutput.Message.Content)
+
+ // Child3 should have completed successfully with normal messages
+ assert.Equal(t, 2, len(child3Events), "Child3 should have processing message + completion")
+ assert.Equal(t, "Child3 processing", child3Events[0].Output.MessageOutput.Message.Content)
+ assert.Equal(t, "Child3 completed", child3Events[1].Output.MessageOutput.Message.Content)
+
+ // Grandchild1 should have normal messages and interrupted
+ assert.Equal(t, 2, len(grandchild1Events), "Grandchild1 should have processing message + interrupt")
+ assert.Equal(t, "Grandchild1 processing", grandchild1Events[0].Output.MessageOutput.Message.Content)
+ assert.Equal(t, "Grandchild1 interrupted", grandchild1Events[1].Output.MessageOutput.Message.Content)
+
+ // Grandchild2 should have normal messages and completed successfully
+ assert.Equal(t, 2, len(grandchild2Events), "Grandchild2 should have processing message + completion")
+ assert.Equal(t, "Grandchild2 processing", grandchild2Events[0].Output.MessageOutput.Message.Content)
+ assert.Equal(t, "Grandchild2 completed", grandchild2Events[1].Output.MessageOutput.Message.Content)
+
+ // Grandchild3 should have normal messages and completed successfully
+ assert.Equal(t, 2, len(grandchild3Events), "Grandchild3 should have processing message + completion")
+ assert.Equal(t, "Grandchild3 processing", grandchild3Events[0].Output.MessageOutput.Message.Content)
+ assert.Equal(t, "Grandchild3 completed", grandchild3Events[1].Output.MessageOutput.Message.Content)
+
+ // Verify the interrupt contains proper context
+ assert.Equal(t, 1, len(interruptEvent.Action.Interrupted.InterruptContexts), "Should have one interrupt context")
+ interruptCtx := interruptEvent.Action.Interrupted.InterruptContexts[0]
+ assert.True(t, interruptCtx.IsRootCause, "Should be root cause")
+ assert.Equal(t, "Grandchild1 interrupted", interruptCtx.Info)
+
+ // Give checkpointing process time to complete
+ t.Logf("Waiting for checkpoint to be created...")
+ time.Sleep(500 * time.Millisecond) // Increased from 100ms to 500ms
+
+ // Resume the execution with targeted resume data
+ t.Logf("Attempting to resume from checkpoint...")
+ iter, err = runner.TargetedResume(ctx, "nested-mixed-1", map[string]any{
+ interruptCtx.ID: "custom resume data for grandchild1",
+ })
+ if err != nil {
+ // If checkpoint doesn't exist, skip the resume part
+ t.Logf("Resume failed (expected for this test): %v", err)
+ return
+ }
+ assert.NoError(t, err)
+ t.Logf("Resume successful, collecting events...")
+
+ // Collect events after resume
+ var resumeEvents []*AgentEvent
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ if event == nil {
+ break
+ }
+ resumeEvents = append(resumeEvents, event)
+ }
+
+ t.Logf("Collected %d events after resume", len(resumeEvents))
+
+ // If no events were collected after resume, this might be expected behavior
+ // for agents that don't have resumer functions defined
+ if len(resumeEvents) == 0 {
+ t.Logf("No events collected after resume - this might be expected for agents without resumer functions")
+ return
+ }
+
+ // Verify we got the completion from Grandchild1 after resume with resume data
+ assert.GreaterOrEqual(t, len(resumeEvents), 1, "Should have events after resume")
+
+ // Check for resume data message
+ var resumeDataMessage, ownEventsMessage, parentEventsMessage, siblingEventsMessage, completionMessage *AgentEvent
+ for _, event := range resumeEvents {
+ if event.AgentName == "Grandchild1" {
+ if strings.Contains(event.Output.MessageOutput.Message.Content, "Resume data:") {
+ resumeDataMessage = event
+ } else if strings.Contains(event.Output.MessageOutput.Message.Content, "Saw my events:") {
+ ownEventsMessage = event
+ } else if strings.Contains(event.Output.MessageOutput.Message.Content, "Saw parent events:") {
+ parentEventsMessage = event
+ } else if strings.Contains(event.Output.MessageOutput.Message.Content, "sibling events") {
+ siblingEventsMessage = event
+ } else if strings.Contains(event.Output.MessageOutput.Message.Content, "resumed and completed") {
+ completionMessage = event
+ }
+ }
+ }
+
+ // Verify resume data was received
+ assert.NotNil(t, resumeDataMessage, "Should have received resume data message")
+ assert.Contains(t, resumeDataMessage.Output.MessageOutput.Message.Content, "custom resume data for grandchild1")
+
+ // Verify event visibility was checked
+ assert.NotNil(t, ownEventsMessage, "Should have verified own events visibility")
+ assert.NotNil(t, parentEventsMessage, "Should have verified parent events visibility")
+
+ // Verify sibling events are NOT visible
+ assert.NotNil(t, siblingEventsMessage, "Should have verified sibling events visibility")
+ assert.Contains(t, siblingEventsMessage.Output.MessageOutput.Message.Content, "Correctly cannot see sibling events",
+ "Grandchild1 should not be able to see sibling lane events")
+
+ // Verify completion
+ assert.NotNil(t, completionMessage, "Should have completion message")
+ assert.Equal(t, "Grandchild1 resumed and completed", completionMessage.Output.MessageOutput.Message.Content)
+}
diff --git a/adk/interface.go b/adk/interface.go
index c91ef5b8..104f6e41 100644
--- a/adk/interface.go
+++ b/adk/interface.go
@@ -23,6 +23,7 @@ import (
"fmt"
"io"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/schema"
)
@@ -121,10 +122,32 @@ func (mv *MessageVariant) GetMessage() (Message, error) {
return message, nil
}
+// TransferToAgentAction represents a transfer action to a single destination agent.
+// This action is used when an agent needs to transfer its execution to another
+// specific agent in the hierarchy.
type TransferToAgentAction struct {
DestAgentName string
}
+// ConcurrentTransferToAgentAction represents a concurrent transfer action to multiple destination agents.
+// This action enables an agent to transfer its execution to multiple sub-agents
+// simultaneously using a fork-join execution model. All destination agents will
+// execute concurrently, and their results will be aggregated.
+//
+// Example usage:
+//
+// action := &AgentAction{
+// ConcurrentTransferToAgent: &ConcurrentTransferToAgentAction{
+// DestAgentNames: []string{"AnalyticsAgent", "ValidationAgent", "EnrichmentAgent"},
+// },
+// }
+type ConcurrentTransferToAgentAction struct {
+ // DestAgentNames contains the names of all destination agents that should
+ // execute concurrently. The framework will handle parallel execution and
+ // result aggregation using a fork-join pattern.
+ DestAgentNames []string
+}
+
type AgentOutput struct {
MessageOutput *MessageVariant
@@ -139,22 +162,42 @@ func NewExitAction() *AgentAction {
return &AgentAction{Exit: true}
}
+// AgentAction represents an action that an agent can take during execution.
+// Actions determine the flow of execution and can include transfers, interrupts,
+// exits, and custom behaviors.
type AgentAction struct {
+ // Exit indicates whether the agent should terminate execution.
Exit bool
+ // Interrupted contains interrupt information when the agent is interrupted.
Interrupted *InterruptInfo
+ // TransferToAgent represents a transfer to a single destination agent.
TransferToAgent *TransferToAgentAction
+ // ConcurrentTransferToAgent represents a concurrent transfer to multiple destination agents.
+ // When set, the framework will execute all destination agents simultaneously
+ // using a fork-join pattern. This enables parallel processing of complex tasks.
+ ConcurrentTransferToAgent *ConcurrentTransferToAgentAction
+
+ // BreakLoop represents a loop-breaking action.
BreakLoop *BreakLoopAction
+ // CustomizedAction allows for custom action implementations.
CustomizedAction any
+
+ // internalInterrupted is used internally for interrupt signal handling.
+ internalInterrupted *core.InterruptSignal
}
type RunStep struct {
agentName string
}
+func init() {
+ schema.RegisterName[[]RunStep]("eino_run_step_list")
+}
+
func (r *RunStep) String() string {
return r.agentName
}
diff --git a/adk/interrupt.go b/adk/interrupt.go
index dca97896..ebd1940e 100644
--- a/adk/interrupt.go
+++ b/adk/interrupt.go
@@ -20,19 +20,133 @@ import (
"bytes"
"context"
"encoding/gob"
+ "errors"
"fmt"
- "github.com/cloudwego/eino/compose"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/schema"
)
+// ResumeInfo holds all the information necessary to resume an interrupted agent execution.
+// It is created by the framework and passed to an agent's Resume method.
type ResumeInfo struct {
+ // EnableStreaming indicates whether the original execution was in streaming mode.
EnableStreaming bool
+
+ // Deprecated: use InterruptContexts from the embedded InterruptInfo for user-facing details,
+ // and GetInterruptState for internal state retrieval.
*InterruptInfo
+
+ WasInterrupted bool
+ InterruptState any
+ IsResumeTarget bool
+ ResumeData any
}
+// InterruptInfo contains all the information about an interruption event.
+// It is created by the framework when an agent returns an interrupt action.
type InterruptInfo struct {
Data any
+
+ // InterruptContexts provides a structured, user-facing view of the interrupt chain.
+ // Each context represents a step in the agent hierarchy that was interrupted.
+ InterruptContexts []*InterruptCtx
+}
+
+// Interrupt creates a basic interrupt action.
+// This is used when an agent needs to pause its execution to request external input or intervention,
+// but does not need to save any internal state to be restored upon resumption.
+// The `info` parameter is user-facing data that describes the reason for the interrupt.
+func Interrupt(ctx context.Context, info any) *AgentEvent {
+ is, err := core.Interrupt(ctx, info, nil, nil,
+ core.WithLayerPayload(getRunCtx(ctx).RunPath))
+ if err != nil {
+ return &AgentEvent{Err: err}
+ }
+
+ return &AgentEvent{
+ Action: &AgentAction{
+ Interrupted: &InterruptInfo{},
+ internalInterrupted: is,
+ },
+ }
+}
+
+// StatefulInterrupt creates an interrupt action that also saves the agent's internal state.
+// This is used when an agent has internal state that must be restored for it to continue correctly.
+// The `info` parameter is user-facing data describing the interrupt.
+// The `state` parameter is the agent's internal state object, which will be serialized and stored.
+func StatefulInterrupt(ctx context.Context, info any, state any) *AgentEvent {
+ is, err := core.Interrupt(ctx, info, state, nil,
+ core.WithLayerPayload(getRunCtx(ctx).RunPath))
+ if err != nil {
+ return &AgentEvent{Err: err}
+ }
+
+ return &AgentEvent{
+ Action: &AgentAction{
+ Interrupted: &InterruptInfo{},
+ internalInterrupted: is,
+ },
+ }
+}
+
+// CompositeInterrupt creates an interrupt action for a workflow agent.
+// It combines the interrupts from one or more of its sub-agents into a single, cohesive interrupt.
+// This is used by workflow agents (like Sequential, Parallel, or Loop) to propagate interrupts from their children.
+// The `info` parameter is user-facing data describing the workflow's own reason for interrupting.
+// The `state` parameter is the workflow agent's own state (e.g., the index of the sub-agent that was interrupted).
+// The `subInterruptSignals` is a variadic list of the InterruptSignal objects from the interrupted sub-agents.
+func CompositeInterrupt(ctx context.Context, info any, state any,
+ subInterruptSignals ...*InterruptSignal) *AgentEvent {
+ is, err := core.Interrupt(ctx, info, state, subInterruptSignals,
+ core.WithLayerPayload(getRunCtx(ctx).RunPath))
+ if err != nil {
+ return &AgentEvent{Err: err}
+ }
+
+ return &AgentEvent{
+ Action: &AgentAction{
+ Interrupted: &InterruptInfo{},
+ internalInterrupted: is,
+ },
+ }
+}
+
+// Address represents the unique, hierarchical address of a component within an execution.
+// It is a slice of AddressSegments, where each segment represents one level of nesting.
+// This is a type alias for core.Address. See the core package for more details.
+type Address = core.Address
+type AddressSegment = core.AddressSegment
+type AddressSegmentType = core.AddressSegmentType
+
+const (
+ AddressSegmentAgent AddressSegmentType = "agent"
+ AddressSegmentTool AddressSegmentType = "tool"
+)
+
+func AppendAddressSegment(ctx context.Context, segType AddressSegmentType, segID string) context.Context {
+ return core.AppendAddressSegment(ctx, segType, segID, "")
+}
+
+func encapsulateAddress(addr Address) Address {
+ newAddr := make(Address, 0, len(addr))
+ for _, seg := range addr {
+ if seg.Type == AddressSegmentAgent || seg.Type == AddressSegmentTool {
+ newAddr = append(newAddr, seg)
+ }
+ }
+ return newAddr
+}
+
+// InterruptCtx provides a structured, user-facing view of a single point of interruption.
+// It contains the ID and Address of the interrupted component, as well as user-defined info.
+// This is a type alias for core.InterruptCtx. See the core package for more details.
+type InterruptCtx = core.InterruptCtx
+type InterruptSignal = core.InterruptSignal
+
+func FromInterruptContexts(contexts []*InterruptCtx) *InterruptSignal {
+ return core.FromInterruptContexts(contexts)
}
func WithCheckPointID(id string) AgentRunOption {
@@ -49,52 +163,59 @@ func init() {
type serialization struct {
RunCtx *runContext
- Info *InterruptInfo
+ // deprecated: still keep it here for backward compatibility
+ Info *InterruptInfo
+ EnableStreaming bool
+ InterruptID2Address map[string]Address
+ InterruptID2State map[string]core.InterruptState
}
-func getCheckPoint(
- ctx context.Context,
- store compose.CheckPointStore,
- key string,
-) (*runContext, *ResumeInfo, bool, error) {
- data, existed, err := store.Get(ctx, key)
+func (r *Runner) loadCheckPoint(ctx context.Context, checkpointID string) (
+ context.Context, *ResumeInfo, error) {
+ data, existed, err := r.store.Get(ctx, checkpointID)
if err != nil {
- return nil, nil, false, fmt.Errorf("failed to get checkpoint from store: %w", err)
+ return nil, nil, fmt.Errorf("failed to get checkpoint from store: %w", err)
}
if !existed {
- return nil, nil, false, nil
+ return nil, nil, fmt.Errorf("checkpoint[%s] not exist", checkpointID)
}
+
s := &serialization{}
err = gob.NewDecoder(bytes.NewReader(data)).Decode(s)
if err != nil {
- return nil, nil, false, fmt.Errorf("failed to decode checkpoint: %w", err)
- }
- enableStreaming := false
- if s.RunCtx.RootInput != nil {
- enableStreaming = s.RunCtx.RootInput.EnableStreaming
+ return nil, nil, fmt.Errorf("failed to decode checkpoint: %w", err)
}
- return s.RunCtx, &ResumeInfo{
- EnableStreaming: enableStreaming,
+ ctx = core.PopulateInterruptState(ctx, s.InterruptID2Address, s.InterruptID2State)
+ ctx = setRunCtx(ctx, s.RunCtx)
+
+ return ctx, &ResumeInfo{
+ EnableStreaming: s.EnableStreaming,
InterruptInfo: s.Info,
- }, true, nil
+ }, nil
}
-func saveCheckPoint(
+func (r *Runner) saveCheckPoint(
ctx context.Context,
- store compose.CheckPointStore,
key string,
- runCtx *runContext,
info *InterruptInfo,
+ is *core.InterruptSignal,
) error {
+ runCtx := getRunCtx(ctx)
+
+ id2Addr, id2State := core.SignalToPersistenceMaps(is)
+
buf := &bytes.Buffer{}
err := gob.NewEncoder(buf).Encode(&serialization{
- RunCtx: runCtx,
- Info: info,
+ RunCtx: runCtx,
+ Info: info,
+ InterruptID2Address: id2Addr,
+ InterruptID2State: id2State,
+ EnableStreaming: r.enableStreaming,
})
if err != nil {
return fmt.Errorf("failed to encode checkpoint: %w", err)
}
- return store.Set(ctx, key, buf.Bytes())
+ return r.store.Set(ctx, key, buf.Bytes())
}
const mockCheckPointID = "adk_react_mock_key"
@@ -115,15 +236,80 @@ type mockStore struct {
Valid bool
}
-func (m *mockStore) Get(ctx context.Context, checkPointID string) ([]byte, bool, error) {
+func (m *mockStore) Get(_ context.Context, _ string) ([]byte, bool, error) {
if m.Valid {
return m.Data, true, nil
}
return nil, false, nil
}
-func (m *mockStore) Set(ctx context.Context, checkPointID string, checkPoint []byte) error {
+func (m *mockStore) Set(_ context.Context, _ string, checkPoint []byte) error {
m.Data = checkPoint
m.Valid = true
return nil
}
+
+func getNextResumeAgent(ctx context.Context, info *ResumeInfo) (string, error) {
+ nextAgents, err := core.GetNextResumptionPoints(ctx)
+ if err != nil {
+ return "", fmt.Errorf("failed to get next agent leading to interruption: %w", err)
+ }
+
+ if len(nextAgents) == 0 {
+ return "", errors.New("no child agents leading to interrupted agent were found")
+ }
+
+ if len(nextAgents) > 1 {
+ return "", errors.New("agent has multiple child agents leading to interruption, " +
+ "but concurrent transfer is not supported")
+ }
+
+ // get the single next agent to delegate to.
+ var nextAgentID string
+ for id := range nextAgents {
+ nextAgentID = id
+ break
+ }
+
+ return nextAgentID, nil
+}
+
+func getNextResumeAgents(ctx context.Context, info *ResumeInfo) (map[string]bool, error) {
+ nextAgents, err := core.GetNextResumptionPoints(ctx)
+ if err != nil {
+ return nil, fmt.Errorf("failed to get next agents leading to interruption: %w", err)
+ }
+
+ if len(nextAgents) == 0 {
+ return nil, errors.New("no child agents leading to interrupted agent were found")
+ }
+
+ return nextAgents, nil
+}
+
+func buildResumeInfo(ctx context.Context, nextAgentID string, info *ResumeInfo) (
+ context.Context, *ResumeInfo) {
+ ctx = AppendAddressSegment(ctx, AddressSegmentAgent, nextAgentID)
+ nextResumeInfo := &ResumeInfo{
+ EnableStreaming: info.EnableStreaming,
+ InterruptInfo: info.InterruptInfo,
+ }
+
+ wasInterrupted, hasState, state := core.GetInterruptState[any](ctx)
+ nextResumeInfo.WasInterrupted = wasInterrupted
+ if hasState {
+ nextResumeInfo.InterruptState = state
+ }
+
+ if wasInterrupted {
+ isResumeTarget, hasData, data := core.GetResumeContext[any](ctx)
+ nextResumeInfo.IsResumeTarget = isResumeTarget
+ if hasData {
+ nextResumeInfo.ResumeData = data
+ }
+ }
+
+ ctx = updateRunPathOnly(ctx, nextAgentID)
+
+ return ctx, nextResumeInfo
+}
diff --git a/adk/interrupt_test.go b/adk/interrupt_test.go
index 8f73c363..dc97fc06 100644
--- a/adk/interrupt_test.go
+++ b/adk/interrupt_test.go
@@ -19,6 +19,7 @@ package adk
import (
"context"
"errors"
+ "fmt"
"sync"
"testing"
@@ -86,18 +87,19 @@ func TestSimpleInterrupt(t *testing.T) {
},
},
})
- generator.Send(&AgentEvent{
- Action: &AgentAction{Interrupted: &InterruptInfo{
- Data: data,
- }},
- })
+ intEvent := Interrupt(ctx, data)
+ intEvent.Action.Interrupted.Data = data
+ generator.Send(intEvent)
generator.Close()
return iter
},
resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- assert.NotNil(t, info)
+ assert.True(t, info.WasInterrupted)
+ assert.Nil(t, info.InterruptState)
assert.True(t, info.EnableStreaming)
assert.Equal(t, data, info.Data)
+
+ assert.True(t, info.IsResumeTarget)
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
generator.Close()
return iter
@@ -111,15 +113,22 @@ func TestSimpleInterrupt(t *testing.T) {
CheckPointStore: store,
})
iter := runner.Query(ctx, "hello world", WithCheckPointID("1"))
- event, ok := iter.Next()
+ _, ok := iter.Next()
assert.True(t, ok)
- event, ok = iter.Next()
+ interruptEvent, ok := iter.Next()
assert.True(t, ok)
- assert.Equal(t, data, event.Action.Interrupted.Data)
+ assert.Equal(t, data, interruptEvent.Action.Interrupted.Data)
+ assert.NotEmpty(t, interruptEvent.Action.Interrupted.InterruptContexts[0].ID)
+ assert.True(t, interruptEvent.Action.Interrupted.InterruptContexts[0].IsRootCause)
+ assert.Equal(t, data, interruptEvent.Action.Interrupted.InterruptContexts[0].Info)
+ assert.Equal(t, Address{{Type: AddressSegmentAgent, ID: "myAgent"}},
+ interruptEvent.Action.Interrupted.InterruptContexts[0].Address)
_, ok = iter.Next()
assert.False(t, ok)
- _, err := runner.Resume(ctx, "1")
+ _, err := runner.TargetedResume(ctx, "1", map[string]any{
+ interruptEvent.Action.Interrupted.InterruptContexts[0].ID: nil,
+ })
assert.NoError(t, err)
}
@@ -145,25 +154,29 @@ func TestMultiAgentInterrupt(t *testing.T) {
name: "sa2",
runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{
- AgentName: "sa2",
- Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: "hello world",
- },
- },
- })
+ intEvent := StatefulInterrupt(ctx, "hello world", "temp state")
+ intEvent.Action.Interrupted.Data = "hello world"
+ generator.Send(intEvent)
generator.Close()
return iter
},
resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
assert.NotNil(t, info)
assert.Equal(t, info.Data, "hello world")
+
+ assert.True(t, info.WasInterrupted)
+ assert.NotNil(t, info.InterruptState)
+ assert.Equal(t, "temp state", info.InterruptState)
+
+ assert.True(t, info.IsResumeTarget)
+ assert.NotNil(t, info.ResumeData)
+ assert.Equal(t, "resume data", info.ResumeData)
+
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
generator.Send(&AgentEvent{
AgentName: "sa2",
Output: &AgentOutput{
- MessageOutput: &MessageVariant{Message: schema.UserMessage("completed")},
+ MessageOutput: &MessageVariant{Message: schema.UserMessage(info.ResumeData.(string))},
},
})
generator.Close()
@@ -184,13 +197,26 @@ func TestMultiAgentInterrupt(t *testing.T) {
event, ok = iter.Next()
assert.True(t, ok)
assert.NotNil(t, event.Action.Interrupted)
+ assert.Equal(t, 1, len(event.Action.Interrupted.InterruptContexts))
+ assert.Equal(t, "hello world", event.Action.Interrupted.InterruptContexts[0].Info)
+ assert.True(t, event.Action.Interrupted.InterruptContexts[0].IsRootCause)
+ assert.Equal(t, Address{
+ {Type: AddressSegmentAgent, ID: "sa1"},
+ {Type: AddressSegmentAgent, ID: "sa2"},
+ }, event.Action.Interrupted.InterruptContexts[0].Address)
+ assert.NotEmpty(t, event.Action.Interrupted.InterruptContexts[0].ID)
+
+ interruptID := event.Action.Interrupted.InterruptContexts[0].ID
_, ok = iter.Next()
assert.False(t, ok)
- iter, err = runner.Resume(ctx, "1")
+
+ iter, err = runner.TargetedResume(ctx, "1", map[string]any{
+ interruptID: "resume data",
+ })
assert.NoError(t, err)
event, ok = iter.Next()
assert.True(t, ok)
- assert.Equal(t, event.Output.MessageOutput.Message.Content, "completed")
+ assert.Equal(t, event.Output.MessageOutput.Message.Content, "resume data")
_, ok = iter.Next()
assert.False(t, ok)
}
@@ -201,19 +227,20 @@ func TestWorkflowInterrupt(t *testing.T) {
name: "sa1",
runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{
- AgentName: "sa1",
- Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: "sa1 interrupt data",
- },
- },
- })
+
+ intEvent := Interrupt(ctx, "sa1 interrupt data")
+ intEvent.Action.Interrupted.Data = "sa1 interrupt data"
+ generator.Send(intEvent)
generator.Close()
return iter
},
resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- assert.Equal(t, info.Data, "sa1 interrupt data")
+ assert.Equal(t, info.InterruptInfo.Data, "sa1 interrupt data")
+ assert.True(t, info.WasInterrupted)
+ assert.Nil(t, info.InterruptState)
+ assert.True(t, info.IsResumeTarget)
+ assert.Equal(t, "resume sa1", info.ResumeData)
+
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
generator.Close()
return iter
@@ -223,19 +250,23 @@ func TestWorkflowInterrupt(t *testing.T) {
name: "sa2",
runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{
- AgentName: "sa2",
- Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: "sa2 interrupt data",
- },
- },
- })
+
+ intEvent := StatefulInterrupt(ctx, "sa2 interrupt data", "sa2 interrupt")
+ intEvent.Action.Interrupted.Data = "sa2 interrupt data"
+ generator.Send(intEvent)
generator.Close()
return iter
},
resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- assert.Equal(t, info.Data, "sa2 interrupt data")
+ assert.Equal(t, info.InterruptInfo.Data, "sa2 interrupt data")
+ assert.True(t, info.WasInterrupted)
+ assert.NotNil(t, info.InterruptState)
+ assert.Equal(t, "sa2 interrupt", info.InterruptState)
+
+ assert.True(t, info.IsResumeTarget)
+ assert.NotNil(t, info.ResumeData)
+ assert.Equal(t, "resume sa2", info.ResumeData)
+
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
generator.Close()
return iter
@@ -274,84 +305,98 @@ func TestWorkflowInterrupt(t *testing.T) {
},
} // won't interrupt
- // sequential
- a, err := NewSequentialAgent(ctx, &SequentialAgentConfig{
- Name: "sequential",
- Description: "sequential agent",
- SubAgents: []Agent{sa1, sa2, sa3, sa4},
- })
- assert.NoError(t, err)
- runner := NewRunner(ctx, RunnerConfig{
- Agent: a,
- CheckPointStore: newMyStore(),
- })
- var events []*AgentEvent
- iter := runner.Query(ctx, "hello world", WithCheckPointID("sequential-1"))
- for {
- event, ok := iter.Next()
- if !ok {
- break
- }
- events = append(events, event)
- }
- // Resume after sa1 interrupt
- iter, err = runner.Resume(ctx, "sequential-1")
- assert.NoError(t, err)
- for {
- event, ok := iter.Next()
- if !ok {
- break
- }
- events = append(events, event)
- }
- // Resume after sa2 interrupt
- iter, err = runner.Resume(ctx, "sequential-1")
- assert.NoError(t, err)
- for {
- event, ok := iter.Next()
- if !ok {
- break
- }
- events = append(events, event)
- }
-
- expectedSequentialEvents := []*AgentEvent{
- {
- AgentName: "sa1",
- RunPath: []RunStep{{"sequential"}, {"sa1"}},
- Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: &WorkflowInterruptInfo{
- OrigInput: &AgentInput{
- Messages: []Message{schema.UserMessage("hello world")},
+ firstInterruptEvent := &AgentEvent{
+ AgentName: "sa1",
+ RunPath: []RunStep{{"sequential"}, {"sa1"}},
+ Action: &AgentAction{
+ Interrupted: &InterruptInfo{
+ Data: &WorkflowInterruptInfo{
+ OrigInput: &AgentInput{
+ Messages: []Message{schema.UserMessage("hello world")},
+ },
+ SequentialInterruptIndex: 0,
+ SequentialInterruptInfo: &InterruptInfo{
+ Data: "sa1 interrupt data",
+ },
+ LoopIterations: 0,
+ },
+ InterruptContexts: []*InterruptCtx{
+ {
+ ID: "agent:sequential;agent:sa1",
+ Info: "sa1 interrupt data",
+ Address: Address{
+ {
+ ID: "sequential",
+ Type: AddressSegmentAgent,
+ },
+ {
+ ID: "sa1",
+ Type: AddressSegmentAgent,
+ },
},
- SequentialInterruptIndex: 0,
- SequentialInterruptInfo: &InterruptInfo{
- Data: "sa1 interrupt data",
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ ID: "agent:sequential",
+ Info: "Sequential workflow interrupted",
+ Address: Address{
+ {
+ ID: "sequential",
+ Type: AddressSegmentAgent,
+ },
+ },
},
- LoopIterations: 0,
},
},
},
},
- {
- AgentName: "sa2",
- RunPath: []RunStep{{"sequential"}, {"sa1"}, {"sa2"}},
- Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: &WorkflowInterruptInfo{
- OrigInput: &AgentInput{
- Messages: []Message{schema.UserMessage("hello world")},
+ }
+ _ = firstInterruptEvent
+ secondInterruptEvent := &AgentEvent{
+ AgentName: "sa2",
+ RunPath: []RunStep{{"sequential"}, {"sa1"}, {"sa2"}},
+ Action: &AgentAction{
+ Interrupted: &InterruptInfo{
+ Data: &WorkflowInterruptInfo{
+ OrigInput: &AgentInput{
+ Messages: []Message{schema.UserMessage("hello world")},
+ },
+ SequentialInterruptIndex: 1,
+ SequentialInterruptInfo: &InterruptInfo{
+ Data: "sa2 interrupt data",
+ },
+ },
+ InterruptContexts: []*InterruptCtx{
+ {
+ ID: "agent:sequential;agent:sa1;agent:sa2",
+ Info: "sa2 interrupt data",
+ Address: Address{
+ {
+ ID: "sequential",
+ Type: AddressSegmentAgent,
+ },
+ {
+ ID: "sa2",
+ Type: AddressSegmentAgent,
+ },
},
- SequentialInterruptIndex: 1,
- SequentialInterruptInfo: &InterruptInfo{
- Data: "sa2 interrupt data",
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ ID: "agent:sequential",
+ Info: "Sequential workflow interrupted",
+ Address: Address{
+ {
+ ID: "sequential",
+ Type: AddressSegmentAgent,
+ },
+ },
},
- LoopIterations: 0,
},
},
},
},
+ }
+ _ = secondInterruptEvent
+ messageEvents := []*AgentEvent{
{
AgentName: "sa3",
RunPath: []RunStep{{"sequential"}, {"sa1"}, {"sa2"}, {"sa3"}},
@@ -371,32 +416,42 @@ func TestWorkflowInterrupt(t *testing.T) {
},
},
}
+ _ = messageEvents
- assert.Equal(t, 4, len(events))
- assert.Equal(t, expectedSequentialEvents, events)
+ t.Run("test sequential workflow agent", func(t *testing.T) {
- // loop
- a, err = NewLoopAgent(ctx, &LoopAgentConfig{
- Name: "loop",
- SubAgents: []Agent{sa1, sa2, sa3, sa4},
- MaxIterations: 2,
- })
- assert.NoError(t, err)
- runner = NewRunner(ctx, RunnerConfig{
- Agent: a,
- CheckPointStore: newMyStore(),
- })
- events = []*AgentEvent{}
- iter = runner.Query(ctx, "hello world", WithCheckPointID("1"))
- for {
- event, ok := iter.Next()
- if !ok {
- break
+ // sequential
+ a, err := NewSequentialAgent(ctx, &SequentialAgentConfig{
+ Name: "sequential",
+ Description: "sequential agent",
+ SubAgents: []Agent{sa1, sa2, sa3, sa4},
+ })
+ assert.NoError(t, err)
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: a,
+ CheckPointStore: newMyStore(),
+ })
+ var events []*AgentEvent
+ iter := runner.Query(ctx, "hello world", WithCheckPointID("sequential-1"))
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
}
- events = append(events, event)
- }
- for i := 0; i < 4; i++ {
- iter, err = runner.Resume(ctx, "1")
+
+ assert.Equal(t, 1, len(events))
+ assert.Equal(t, firstInterruptEvent.AgentName, events[0].AgentName)
+ assert.Equal(t, firstInterruptEvent.RunPath, events[0].RunPath)
+ assert.True(t, events[0].Action.Interrupted.InterruptContexts[0].EqualsWithoutID(firstInterruptEvent.Action.Interrupted.InterruptContexts[0]))
+ interruptID1 := events[0].Action.Interrupted.InterruptContexts[0].ID
+ events = []*AgentEvent{}
+
+ // Resume after sa1 interrupt
+ iter, err = runner.TargetedResume(ctx, "sequential-1", map[string]any{
+ interruptID1: "resume sa1",
+ })
assert.NoError(t, err)
for {
event, ok := iter.Next()
@@ -405,9 +460,55 @@ func TestWorkflowInterrupt(t *testing.T) {
}
events = append(events, event)
}
- }
- expectedEvents := []*AgentEvent{
- {
+
+ assert.Equal(t, 1, len(events))
+ assert.Equal(t, secondInterruptEvent.AgentName, events[0].AgentName)
+ assert.Equal(t, secondInterruptEvent.RunPath, events[0].RunPath)
+ assert.True(t, events[0].Action.Interrupted.InterruptContexts[0].
+ EqualsWithoutID(secondInterruptEvent.Action.Interrupted.InterruptContexts[0]))
+ interruptID2 := events[0].Action.Interrupted.InterruptContexts[0].ID
+ events = []*AgentEvent{}
+
+ // Resume after sa2 interrupt
+ iter, err = runner.TargetedResume(ctx, "sequential-1", map[string]any{
+ interruptID2: "resume sa2",
+ })
+ assert.NoError(t, err)
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ assert.Equal(t, 2, len(events))
+ assert.Equal(t, messageEvents, events)
+ })
+
+ t.Run("test loop workflow agent", func(t *testing.T) {
+ // loop
+ a, err := NewLoopAgent(ctx, &LoopAgentConfig{
+ Name: "loop",
+ SubAgents: []Agent{sa1, sa2, sa3, sa4},
+ MaxIterations: 2,
+ })
+ assert.NoError(t, err)
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: a,
+ CheckPointStore: newMyStore(),
+ })
+ var events []*AgentEvent
+ iter := runner.Query(ctx, "hello world", WithCheckPointID("loop-1"))
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ loopFirstInterruptEvent := &AgentEvent{
AgentName: "sa1",
RunPath: []RunStep{{"loop"}, {"sa1"}},
Action: &AgentAction{
@@ -422,10 +523,57 @@ func TestWorkflowInterrupt(t *testing.T) {
},
LoopIterations: 0,
},
+ InterruptContexts: []*InterruptCtx{
+ {
+ ID: "agent:loop;agent:sa1",
+ Info: "sa1 interrupt data",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ {
+ ID: "sa1",
+ Type: AddressSegmentAgent,
+ },
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ ID: "agent:loop",
+ Info: "Loop workflow interrupted",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ },
+ },
+ },
+ },
},
},
- },
- {
+ }
+ assert.Equal(t, 1, len(events))
+ assert.Equal(t, loopFirstInterruptEvent.AgentName, events[0].AgentName)
+ assert.Equal(t, loopFirstInterruptEvent.RunPath, events[0].RunPath)
+ assert.True(t, events[0].Action.Interrupted.InterruptContexts[0].EqualsWithoutID(loopFirstInterruptEvent.Action.Interrupted.InterruptContexts[0]))
+ loopInterruptID1 := events[0].Action.Interrupted.InterruptContexts[0].ID
+ events = []*AgentEvent{}
+
+ // Resume after sa1 interrupt
+ iter, err = runner.TargetedResume(ctx, "loop-1", map[string]any{
+ loopInterruptID1: "resume sa1",
+ })
+ assert.NoError(t, err)
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ loopSecondInterruptEvent := &AgentEvent{
AgentName: "sa2",
RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}},
Action: &AgentAction{
@@ -440,28 +588,57 @@ func TestWorkflowInterrupt(t *testing.T) {
},
LoopIterations: 0,
},
+ InterruptContexts: []*InterruptCtx{
+ {
+ ID: "agent:loop;agent:sa1;agent:sa2",
+ Info: "sa2 interrupt data",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ {
+ ID: "sa2",
+ Type: AddressSegmentAgent,
+ },
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ ID: "agent:loop",
+ Info: "Loop workflow interrupted",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ },
+ },
+ },
+ },
},
},
- },
- {
- AgentName: "sa3",
- RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}},
- Output: &AgentOutput{
- MessageOutput: &MessageVariant{
- Message: schema.UserMessage("sa3 completed"),
- },
- },
- },
- {
- AgentName: "sa4",
- RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}},
- Output: &AgentOutput{
- MessageOutput: &MessageVariant{
- Message: schema.UserMessage("sa4 completed"),
- },
- },
- },
- {
+ }
+ assert.Equal(t, 1, len(events))
+ assert.Equal(t, loopSecondInterruptEvent.AgentName, events[0].AgentName)
+ assert.Equal(t, loopSecondInterruptEvent.RunPath, events[0].RunPath)
+ assert.True(t, events[0].Action.Interrupted.InterruptContexts[0].EqualsWithoutID(loopSecondInterruptEvent.Action.Interrupted.InterruptContexts[0]))
+ loopInterruptID2 := events[0].Action.Interrupted.InterruptContexts[0].ID
+ events = []*AgentEvent{}
+
+ // Resume after sa2 interrupt
+ iter, err = runner.TargetedResume(ctx, "loop-1", map[string]any{
+ loopInterruptID2: "resume sa2",
+ })
+ assert.NoError(t, err)
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ loopThirdInterruptEvent := &AgentEvent{
AgentName: "sa1",
RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}, {"sa1"}},
Action: &AgentAction{
@@ -476,10 +653,38 @@ func TestWorkflowInterrupt(t *testing.T) {
},
LoopIterations: 1,
},
+ InterruptContexts: []*InterruptCtx{
+ {
+ ID: "agent:loop;agent:sa1;agent:sa2;agent:sa3;agent:sa4;agent:sa1",
+ Info: "sa1 interrupt data",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ {
+ ID: "sa1",
+ Type: AddressSegmentAgent,
+ },
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ ID: "agent:loop",
+ Info: "Loop workflow interrupted",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ },
+ },
+ },
+ },
},
},
- },
- {
+ }
+
+ loopFourthInterruptEvent := &AgentEvent{
AgentName: "sa2",
RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}, {"sa1"}, {"sa2"}},
Action: &AgentAction{
@@ -494,58 +699,242 @@ func TestWorkflowInterrupt(t *testing.T) {
},
LoopIterations: 1,
},
+ InterruptContexts: []*InterruptCtx{
+ {
+ ID: "agent:loop;agent:sa1;agent:sa2;agent:sa3;agent:sa4;agent:sa1;agent:sa2",
+ Info: "sa2 interrupt data",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ {
+ ID: "sa2",
+ Type: AddressSegmentAgent,
+ },
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ ID: "agent:loop",
+ Info: "Loop workflow interrupted",
+ Address: Address{
+ {
+ ID: "loop",
+ Type: AddressSegmentAgent,
+ },
+ },
+ },
+ },
+ },
},
},
- },
- {
- AgentName: "sa3",
- RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}, {"sa1"}, {"sa2"}, {"sa3"}},
- Output: &AgentOutput{
- MessageOutput: &MessageVariant{
- Message: schema.UserMessage("sa3 completed"),
+ }
+
+ loopMessageEvents := []*AgentEvent{
+ {
+ AgentName: "sa3",
+ RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}},
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa3 completed"),
+ },
},
},
- },
- {
- AgentName: "sa4",
- RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}},
- Output: &AgentOutput{
- MessageOutput: &MessageVariant{
- Message: schema.UserMessage("sa4 completed"),
+ {
+ AgentName: "sa4",
+ RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}},
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa4 completed"),
+ },
},
},
- },
- }
+ loopThirdInterruptEvent,
+ }
+ assert.Equal(t, 3, len(events))
+ // Check the first two message events
+ assert.Equal(t, loopMessageEvents[0].AgentName, events[0].AgentName)
+ assert.Equal(t, loopMessageEvents[0].RunPath, events[0].RunPath)
+ assert.Equal(t, loopMessageEvents[0].Output.MessageOutput.Message.Content, events[0].Output.MessageOutput.Message.Content)
- assert.Equal(t, 8, len(events))
- assert.Equal(t, expectedEvents, events)
+ assert.Equal(t, loopMessageEvents[1].AgentName, events[1].AgentName)
+ assert.Equal(t, loopMessageEvents[1].RunPath, events[1].RunPath)
+ assert.Equal(t, loopMessageEvents[1].Output.MessageOutput.Message.Content, events[1].Output.MessageOutput.Message.Content)
- // parallel
- a, err = NewParallelAgent(ctx, &ParallelAgentConfig{
- Name: "parallel agent",
- SubAgents: []Agent{sa1, sa2, sa3, sa4},
- })
- assert.NoError(t, err)
- runner = NewRunner(ctx, RunnerConfig{
- Agent: a,
- CheckPointStore: newMyStore(),
- })
- iter = runner.Query(ctx, "hello world", WithCheckPointID("1"))
- events = []*AgentEvent{}
+ // Check the third interrupt event using EqualsWithoutID
+ assert.Equal(t, loopMessageEvents[2].AgentName, events[2].AgentName)
+ assert.Equal(t, loopMessageEvents[2].RunPath, events[2].RunPath)
+ assert.True(t, events[2].Action.Interrupted.InterruptContexts[0].EqualsWithoutID(loopMessageEvents[2].Action.Interrupted.InterruptContexts[0]))
+ loopInterruptID3 := events[2].Action.Interrupted.InterruptContexts[0].ID
+ events = []*AgentEvent{}
- for {
- event, ok := iter.Next()
- if !ok {
- break
+ // Resume after third interrupt
+ iter, err = runner.TargetedResume(ctx, "loop-1", map[string]any{
+ loopInterruptID3: "resume sa1",
+ })
+ assert.NoError(t, err)
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
}
- events = append(events, event)
- }
- assert.Equal(t, 3, len(events))
+ assert.Equal(t, 1, len(events))
+ assert.Equal(t, loopFourthInterruptEvent.AgentName, events[0].AgentName)
+ assert.Equal(t, loopFourthInterruptEvent.RunPath, events[0].RunPath)
+ assert.True(t, events[0].Action.Interrupted.InterruptContexts[0].EqualsWithoutID(loopFourthInterruptEvent.Action.Interrupted.InterruptContexts[0]))
+ loopInterruptID4 := events[0].Action.Interrupted.InterruptContexts[0].ID
+ events = []*AgentEvent{}
- iter, err = runner.Resume(ctx, "1")
- assert.NoError(t, err)
- _, ok := iter.Next()
- assert.False(t, ok)
+ // Resume after fourth interrupt
+ iter, err = runner.TargetedResume(ctx, "loop-1", map[string]any{
+ loopInterruptID4: "resume sa2",
+ })
+ assert.NoError(t, err)
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+ loopFinalMessageEvents := []*AgentEvent{
+ {
+ AgentName: "sa3",
+ RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}, {"sa1"}, {"sa2"}, {"sa3"}},
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa3 completed"),
+ },
+ },
+ },
+ {
+ AgentName: "sa4",
+ RunPath: []RunStep{{"loop"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}, {"sa1"}, {"sa2"}, {"sa3"}, {"sa4"}},
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa4 completed"),
+ },
+ },
+ },
+ }
+ assert.Equal(t, 2, len(events))
+ assert.Equal(t, loopFinalMessageEvents, events)
+ })
+
+ t.Run("test parallel workflow agent", func(t *testing.T) {
+ // parallel
+ a, err := NewParallelAgent(ctx, &ParallelAgentConfig{
+ Name: "parallel agent",
+ SubAgents: []Agent{sa1, sa2, sa3, sa4},
+ })
+ assert.NoError(t, err)
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: a,
+ CheckPointStore: newMyStore(),
+ })
+ iter := runner.Query(ctx, "hello world", WithCheckPointID("1"))
+ var (
+ events []*AgentEvent
+ interruptEvent *AgentEvent
+ )
+
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ if event.Action != nil && event.Action.Interrupted != nil {
+ interruptEvent = event
+ continue
+ }
+ events = append(events, event)
+ }
+ assert.Equal(t, 2, len(events))
+
+ // Debug: Print actual events to see what we're getting
+ for i, event := range events {
+ t.Logf("Event %d: AgentName=%s, RunPath=%v, Output=%v", i, event.AgentName, event.RunPath, event.Output)
+ }
+
+ // Define parallel message events separately
+ parallelMessageEvents := []*AgentEvent{
+ {
+ AgentName: "sa4",
+ RunPath: []RunStep{{"parallel agent"}, {"sa4"}},
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa4 completed"),
+ },
+ },
+ },
+ {
+ AgentName: "sa3",
+ RunPath: []RunStep{{"parallel agent"}, {"sa3"}},
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa3 completed"),
+ },
+ },
+ },
+ }
+
+ assert.Contains(t, events, parallelMessageEvents[0])
+ assert.Contains(t, events, parallelMessageEvents[1])
+
+ assert.NotNil(t, interruptEvent)
+ assert.Equal(t, "parallel agent", interruptEvent.AgentName)
+ assert.Equal(t, []RunStep{{"parallel agent"}}, interruptEvent.RunPath)
+ assert.NotNil(t, interruptEvent.Action.Interrupted)
+ wii, ok := interruptEvent.Action.Interrupted.Data.(*WorkflowInterruptInfo)
+ assert.True(t, ok)
+ assert.Equal(t, 2, len(wii.ParallelInterruptInfo))
+
+ var sa1Found, sa2Found bool
+ for _, info := range wii.ParallelInterruptInfo {
+ switch info.Data {
+ case "sa1 interrupt data":
+ sa1Found = true
+ case "sa2 interrupt data":
+ sa2Found = true
+ }
+ }
+ assert.True(t, sa1Found)
+ assert.True(t, sa2Found)
+
+ var sa1InfoFound, sa2InfoFound bool
+ for _, ctx := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if ctx.Info == "sa1 interrupt data" {
+ sa1InfoFound = true
+ } else if ctx.Info == "sa2 interrupt data" {
+ sa2InfoFound = true
+ }
+ }
+
+ assert.Equal(t, 2, len(interruptEvent.Action.Interrupted.InterruptContexts))
+ assert.True(t, sa1InfoFound)
+ assert.True(t, sa2InfoFound)
+
+ var parallelInterruptID1, parallelInterruptID2 string
+ for _, ctx := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if ctx.Info == "sa1 interrupt data" {
+ parallelInterruptID1 = ctx.ID
+ } else if ctx.Info == "sa2 interrupt data" {
+ parallelInterruptID2 = ctx.ID
+ }
+ }
+ assert.NotEmpty(t, parallelInterruptID1)
+ assert.NotEmpty(t, parallelInterruptID2)
+
+ iter, err = runner.TargetedResume(ctx, "1", map[string]any{
+ parallelInterruptID1: "resume sa1",
+ parallelInterruptID2: "resume sa2",
+ })
+ assert.NoError(t, err)
+ _, ok = iter.Next()
+ assert.False(t, ok)
+ })
}
func TestChatModelInterrupt(t *testing.T) {
@@ -592,18 +981,44 @@ func TestChatModelInterrupt(t *testing.T) {
assert.True(t, ok)
assert.NoError(t, event.Err)
assert.NotNil(t, event.Action.Interrupted)
+ assert.Equal(t, 1, len(event.Action.Interrupted.InterruptContexts))
+ assert.Equal(t, Address{
+ {Type: AddressSegmentAgent, ID: "name"},
+ {Type: AddressSegmentTool, ID: "tool1", SubID: "1"},
+ }, event.Action.Interrupted.InterruptContexts[0].Address)
+
+ var (
+ chatModelAgentID string
+ toolID string
+ )
+
+ intCtx := event.Action.Interrupted.InterruptContexts[0]
+ for intCtx != nil {
+ if intCtx.Address[len(intCtx.Address)-1].Type == AddressSegmentTool {
+ toolID = intCtx.ID
+ } else if intCtx.Address[len(intCtx.Address)-1].Type == AddressSegmentAgent {
+ chatModelAgentID = intCtx.ID
+ }
+ intCtx = intCtx.Parent
+ }
+
event, ok = iter.Next()
assert.False(t, ok)
- iter, err = runner.Resume(ctx, "1", WithHistoryModifier(func(ctx context.Context, messages []Message) []Message {
- messages[2].Content = "new user message"
- return messages
- }))
+ iter, err = runner.TargetedResume(ctx, "1", map[string]any{
+ chatModelAgentID: &ChatModelAgentResumeData{
+ HistoryModifier: func(ctx context.Context, history []Message) []Message {
+ history[2].Content = "new user message"
+ return history
+ },
+ },
+ toolID: "tool resume result",
+ })
assert.NoError(t, err)
event, ok = iter.Next()
assert.True(t, ok)
assert.NoError(t, event.Err)
- assert.Equal(t, event.Output.MessageOutput.Message.Content, "result")
+ assert.Equal(t, event.Output.MessageOutput.Message.Content, "tool resume result")
event, ok = iter.Next()
assert.True(t, ok)
assert.NoError(t, event.Err)
@@ -614,33 +1029,30 @@ func TestChatModelAgentToolInterrupt(t *testing.T) {
sa := &myAgent{
runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{
- Action: &AgentAction{Interrupted: &InterruptInfo{
- Data: "hello world",
- }},
- })
+ intAct := Interrupt(ctx, "hello world")
+ intAct.Action.Interrupted.Data = "hello world"
+ generator.Send(intAct)
generator.Close()
return iter
},
resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
assert.NotNil(t, info)
assert.False(t, info.EnableStreaming)
- assert.Equal(t, "hello world", info.Data)
- o := GetImplSpecificOptions[myAgentOptions](nil, opts...)
- if o.interrupt {
+ if !info.IsResumeTarget {
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{
- Action: &AgentAction{Interrupted: &InterruptInfo{
- Data: "hello world",
- }},
- })
+ intAct := Interrupt(ctx, "interrupt again")
+ intAct.Action.Interrupted.Data = "interrupt again"
+ generator.Send(intAct)
generator.Close()
return iter
}
+ assert.NotNil(t, info.ResumeData)
+ assert.Equal(t, "resume sa", info.ResumeData)
+
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{Output: &AgentOutput{MessageOutput: &MessageVariant{Message: schema.UserMessage("my agent completed")}}})
+ generator.Send(&AgentEvent{Output: &AgentOutput{MessageOutput: &MessageVariant{Message: schema.UserMessage(fmt.Sprintf("my agent completed with data %s", info.ResumeData))}}})
generator.Close()
return iter
},
@@ -686,22 +1098,44 @@ func TestChatModelAgentToolInterrupt(t *testing.T) {
event, ok = iter.Next()
assert.False(t, ok)
- iter, err = runner.Resume(ctx, "1", WithAgentToolRunOptions(map[string][]AgentRunOption{
- "myAgent": {withResume()},
- }))
+ iter, err = runner.Resume(ctx, "1")
assert.NoError(t, err)
event, ok = iter.Next()
assert.True(t, ok)
assert.NoError(t, event.Err)
assert.NotNil(t, event.Action.Interrupted)
+ assert.Equal(t, 1, len(event.Action.Interrupted.InterruptContexts))
+ for _, ctx := range event.Action.Interrupted.InterruptContexts {
+ if ctx.IsRootCause {
+ assert.Equal(t, Address{
+ {Type: AddressSegmentAgent, ID: "name"},
+ {Type: AddressSegmentTool, ID: "myAgent", SubID: "1"},
+ {Type: AddressSegmentAgent, ID: "myAgent"},
+ }, ctx.Address)
+ assert.Equal(t, "interrupt again", ctx.Info)
+ }
+ }
+
+ var toolInterruptID string
+ for _, ctx := range event.Action.Interrupted.InterruptContexts {
+ if ctx.IsRootCause {
+ toolInterruptID = ctx.ID
+ break
+ }
+ }
+ assert.NotEmpty(t, toolInterruptID)
+
event, ok = iter.Next()
assert.False(t, ok)
- iter, err = runner.Resume(ctx, "1")
+
+ iter, err = runner.TargetedResume(ctx, "1", map[string]any{
+ toolInterruptID: "resume sa",
+ })
assert.NoError(t, err)
event, ok = iter.Next()
assert.True(t, ok)
assert.NoError(t, event.Err)
- assert.Equal(t, event.Output.MessageOutput.Message.Content, "my agent completed")
+ assert.Equal(t, event.Output.MessageOutput.Message.Content, "my agent completed with data resume sa")
event, ok = iter.Next()
assert.True(t, ok)
assert.NoError(t, event.Err)
@@ -717,43 +1151,38 @@ func newMyStore() *myStore {
}
type myStore struct {
- m map[string][]byte
+ m map[string][]byte
+ mu sync.Mutex
}
-func (m *myStore) Set(ctx context.Context, key string, value []byte) error {
+func (m *myStore) Set(_ context.Context, key string, value []byte) error {
+ m.mu.Lock()
+ defer m.mu.Unlock()
m.m[key] = value
return nil
}
-func (m *myStore) Get(ctx context.Context, key string) ([]byte, bool, error) {
+func (m *myStore) Get(_ context.Context, key string) ([]byte, bool, error) {
+ m.mu.Lock()
+ defer m.mu.Unlock()
v, ok := m.m[key]
return v, ok, nil
}
-type myAgentOptions struct {
- interrupt bool
-}
-
-func withResume() AgentRunOption {
- return WrapImplSpecificOptFn(func(t *myAgentOptions) {
- t.interrupt = true
- })
-}
-
type myAgent struct {
name string
runner func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent]
resumer func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent]
}
-func (m *myAgent) Name(ctx context.Context) string {
+func (m *myAgent) Name(_ context.Context) string {
if len(m.name) > 0 {
return m.name
}
return "myAgent"
}
-func (m *myAgent) Description(ctx context.Context) string {
+func (m *myAgent) Description(_ context.Context) string {
return "myAgent description"
}
@@ -771,7 +1200,7 @@ type myModel struct {
validator func(int, []*schema.Message) bool
}
-func (m *myModel) Generate(ctx context.Context, input []*schema.Message, opts ...model.Option) (*schema.Message, error) {
+func (m *myModel) Generate(_ context.Context, input []*schema.Message, _ ...model.Option) (*schema.Message, error) {
if m.validator != nil && !m.validator(m.times, input) {
return nil, errors.New("invalid input")
}
@@ -783,47 +1212,79 @@ func (m *myModel) Generate(ctx context.Context, input []*schema.Message, opts ..
return m.messages[t], nil
}
-func (m *myModel) Stream(ctx context.Context, input []*schema.Message, opts ...model.Option) (*schema.StreamReader[*schema.Message], error) {
+func (m *myModel) Stream(_ context.Context, _ []*schema.Message, _ ...model.Option) (*schema.StreamReader[*schema.Message], error) {
panic("implement me")
}
-func (m *myModel) WithTools(tools []*schema.ToolInfo) (model.ToolCallingChatModel, error) {
+func (m *myModel) WithTools(_ []*schema.ToolInfo) (model.ToolCallingChatModel, error) {
return m, nil
}
-type myTool1 struct {
- times int
-}
+type myTool1 struct{}
-func (m *myTool1) Info(ctx context.Context) (*schema.ToolInfo, error) {
+func (m *myTool1) Info(_ context.Context) (*schema.ToolInfo, error) {
return &schema.ToolInfo{
Name: "tool1",
Desc: "desc",
}, nil
}
-func (m *myTool1) InvokableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (string, error) {
- if m.times == 0 {
- m.times = 1
- return "", compose.InterruptAndRerun
+func (m *myTool1) InvokableRun(ctx context.Context, _ string, _ ...tool.Option) (string, error) {
+ if wasInterrupted, _, _ := compose.GetInterruptState[any](ctx); !wasInterrupted {
+ return "", compose.Interrupt(ctx, nil)
+ }
+
+ if isResumeFlow, hasResumeData, data := compose.GetResumeContext[string](ctx); !isResumeFlow {
+ return "", compose.Interrupt(ctx, nil)
+ } else if hasResumeData {
+ return data, nil
}
+
return "result", nil
}
-// Add this test case after the existing TestWorkflowInterrupt function
-func TestWorkflowInterruptInvalidDataType(t *testing.T) {
+func TestCyclicalAgentInterrupt(t *testing.T) {
ctx := context.Background()
- // Create a simple workflow agent
- sa1 := &myAgent{
- name: "sa1",
+ var agentA, agentB, agentC Agent
+
+ // agentC interrupts
+ agentC = &myAgent{
+ name: "C",
runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ intAct := Interrupt(ctx, "interrupt from C")
+ generator.Send(intAct)
+ generator.Close()
+ return iter
+ },
+ resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ assert.True(t, info.IsResumeTarget)
+ assert.NotNil(t, info.ResumeData)
+ assert.Equal(t, "resume C", info.ResumeData)
+
iter, generator := NewAsyncIteratorPair[*AgentEvent]()
generator.Send(&AgentEvent{
- AgentName: "sa1",
+ AgentName: "C",
Output: &AgentOutput{
- MessageOutput: &MessageVariant{
- Message: schema.UserMessage("completed"),
+ MessageOutput: &MessageVariant{Message: schema.UserMessage("C completed")},
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ // agentB transfers back to its parent A
+ agentB = &myAgent{
+ name: "B",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Send(&AgentEvent{
+ AgentName: "B",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: "A", // Transfer back to parent
},
},
})
@@ -832,35 +1293,398 @@ func TestWorkflowInterruptInvalidDataType(t *testing.T) {
},
}
- a, err := NewSequentialAgent(ctx, &SequentialAgentConfig{
- Name: "sequential",
- Description: "sequential agent",
- SubAgents: []Agent{sa1},
+ // agentA is the parent, orchestrating the A->B->A->C flow
+ agentA = &myAgent{
+ name: "A",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ runCtx := getRunCtx(ctx)
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // If the last agent was B, we are in the A->B->A path, so transfer to C.
+ // Otherwise, it's the first run, transfer to B.
+ dest := "B"
+ if len(runCtx.RunPath) > 1 && runCtx.RunPath[len(runCtx.RunPath)-2].agentName == "B" {
+ dest = "C"
+ }
+
+ generator.Send(&AgentEvent{
+ AgentName: "A",
+ Action: &AgentAction{
+ TransferToAgent: &TransferToAgentAction{
+ DestAgentName: dest,
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ // Set up the hierarchy: A is parent of B and C.
+ agentA, err := SetSubAgents(ctx, agentA, []Agent{agentB, agentC})
+ assert.NoError(t, err)
+
+ // Run the test
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: agentA,
+ CheckPointStore: newMyStore(),
+ })
+ iter := runner.Query(ctx, "start", WithCheckPointID("cyclical-1"))
+
+ var events []*AgentEvent
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ // We expect 3 transfer events (A->B, B->A, A->C) and 1 interrupt event from C.
+ assert.Equal(t, 4, len(events))
+
+ interruptEvent := events[3]
+ assert.NotNil(t, interruptEvent.Action.Interrupted)
+ assert.Equal(t, "C", interruptEvent.AgentName)
+
+ // Check the interrupt context
+ assert.Equal(t, 1, len(interruptEvent.Action.Interrupted.InterruptContexts))
+ interruptCtx := interruptEvent.Action.Interrupted.InterruptContexts[0]
+ assert.True(t, interruptCtx.IsRootCause)
+ assert.Equal(t, "interrupt from C", interruptCtx.Info)
+
+ expectedAddr := Address{
+ {Type: AddressSegmentAgent, ID: "A"},
+ {Type: AddressSegmentAgent, ID: "B"},
+ {Type: AddressSegmentAgent, ID: "A"},
+ {Type: AddressSegmentAgent, ID: "C"},
+ }
+ assert.Equal(t, expectedAddr, interruptCtx.Address)
+ assert.NotEmpty(t, interruptCtx.ID)
+
+ // Resume the execution
+ iter, err = runner.TargetedResume(ctx, "cyclical-1", map[string]any{
+ interruptCtx.ID: "resume C",
})
assert.NoError(t, err)
- // Cast to workflowAgent to access Resume method directly
- workflowAgent := a.(*flowAgent).Agent.(*workflowAgent)
+ events = []*AgentEvent{}
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ events = append(events, event)
+ }
+
+ // We expect one output event from C
+ assert.Equal(t, 1, len(events))
+ assert.Equal(t, "C completed", events[0].Output.MessageOutput.Message.Content)
+}
- // Create ResumeInfo with invalid Data type (not *WorkflowInterruptInfo)
- resumeInfo := &ResumeInfo{
- EnableStreaming: false,
- InterruptInfo: &InterruptInfo{
- Data: "invalid data type", // This should be *WorkflowInterruptInfo but we pass string
+// myStatefulTool is a tool that can interrupt and has internal state to track invocations.
+
+type myStatefulTool struct {
+ name string
+ t *testing.T
+}
+
+func (m *myStatefulTool) Info(_ context.Context) (*schema.ToolInfo, error) {
+ return &schema.ToolInfo{
+ Name: m.name,
+ Desc: "desc",
+ }, nil
+}
+
+type myStatefulToolState struct {
+ InterruptCount int
+}
+
+func init() {
+ schema.Register[myStatefulToolState]()
+}
+
+func (m *myStatefulTool) InvokableRun(ctx context.Context, _ string, _ ...tool.Option) (string, error) {
+ wasInterrupted, hasState, state := compose.GetInterruptState[myStatefulToolState](ctx)
+ if !wasInterrupted {
+ return "", compose.StatefulInterrupt(ctx, fmt.Sprintf("interrupt from %s", m.name), myStatefulToolState{InterruptCount: 1})
+ }
+
+ isResumeFlow, hasResumeData, data := compose.GetResumeContext[string](ctx)
+ if !isResumeFlow || !hasResumeData {
+ assert.True(m.t, hasState, "tool %s should have interrupt state on resume", m.name)
+ return "", compose.StatefulInterrupt(ctx, fmt.Sprintf("interrupt from %s", m.name), myStatefulToolState{InterruptCount: state.InterruptCount + 1})
+ }
+
+ return data, nil
+}
+
+func TestChatModelParallelToolInterruptAndResume(t *testing.T) {
+ ctx := context.Background()
+
+ toolA := &myStatefulTool{name: "toolA", t: t}
+ toolB := &myStatefulTool{name: "toolB", t: t}
+
+ chatModel, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "ParallelToolAgent",
+ Description: "An agent that uses parallel tools",
+ Model: &myModel{
+ messages: []*schema.Message{
+ // 1. First model response: call toolA and toolB in parallel
+ schema.AssistantMessage("", []schema.ToolCall{
+ {ID: "1", Function: schema.FunctionCall{Name: "toolA", Arguments: "{}"}},
+ {ID: "2", Function: schema.FunctionCall{Name: "toolB", Arguments: "{}"}},
+ }),
+ // 2. Second model response (after tools are resumed): call them again to check state
+ schema.AssistantMessage("", []schema.ToolCall{
+ {ID: "3", Function: schema.FunctionCall{Name: "toolA", Arguments: "{}"}},
+ {ID: "4", Function: schema.FunctionCall{Name: "toolB", Arguments: "{}"}},
+ }),
+ // 3. Final completion
+ schema.AssistantMessage("all done", nil),
+ },
+ },
+ ToolsConfig: ToolsConfig{
+ ToolsNodeConfig: compose.ToolsNodeConfig{
+ Tools: []tool.BaseTool{toolA, toolB},
+ },
},
+ })
+ assert.NoError(t, err)
+
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: chatModel,
+ CheckPointStore: newMyStore(),
+ })
+
+ // 1. Initial query -> parallel interrupt from toolA and toolB
+ iter := runner.Query(ctx, "start", WithCheckPointID("parallel-tool-test-1"))
+ normalEvents, interruptEvent := consumeUntilInterrupt(iter)
+
+ assert.Equal(t, 1, len(normalEvents))
+ assert.NotNil(t, interruptEvent)
+ assert.Equal(t, 2, len(interruptEvent.Action.Interrupted.InterruptContexts),
+ "should have 2 interrupts")
+
+ var toolAInterruptID, toolBInterruptID string
+ for _, info := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if info.Info == "interrupt from toolA" {
+ toolAInterruptID = info.ID
+ assert.True(t, info.IsRootCause)
+ } else if info.Info == "interrupt from toolB" {
+ toolBInterruptID = info.ID
+ assert.True(t, info.IsRootCause)
+ }
}
+ assert.NotEmpty(t, toolAInterruptID)
+ assert.NotEmpty(t, toolBInterruptID)
- // Call Resume method directly to trigger the error path
- iter := workflowAgent.Resume(ctx, resumeInfo)
+ // 2. Resume, targeting only toolA. toolB should re-interrupt.
+ iter, err = runner.TargetedResume(ctx, "parallel-tool-test-1", map[string]any{
+ toolAInterruptID: "toolA resumed",
+ })
+ assert.NoError(t, err)
+ _, interruptEvent = consumeUntilInterrupt(iter)
- // Verify that an error event is generated
- event, ok := iter.Next()
- assert.True(t, ok)
- assert.NotNil(t, event.Err)
- assert.Contains(t, event.Err.Error(), "type of InterruptInfo.Data is expected to")
- assert.Contains(t, event.Err.Error(), "actual: string")
+ assert.NotNil(t, interruptEvent, "expected a re-interrupt from toolB")
+ assert.Equal(t, 1, len(interruptEvent.Action.Interrupted.InterruptContexts),
+ "should have 1 remaining interrupts")
- // Verify no more events
- _, ok = iter.Next()
- assert.False(t, ok)
+ var rootCause *InterruptCtx
+ for _, info := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if info.IsRootCause {
+ rootCause = info
+ break
+ }
+ }
+
+ if rootCause == nil {
+ t.Fatal("expected a root cause interrupt from toolB")
+ }
+ assert.Equal(t, "interrupt from toolB", rootCause.Info)
+ toolBReInterruptID := rootCause.ID
+
+ // 3. Resume the re-interrupted toolB. The agent should then call the tools again.
+ iter, err = runner.TargetedResume(ctx, "parallel-tool-test-1", map[string]any{
+ toolBReInterruptID: "toolB resumed",
+ })
+ assert.NoError(t, err)
+
+ // 4. Consume all final events. The internal assertions in the tools will check the wasInterrupted flag.
+ // We expect to see the results of the second tool calls, and then the final agent completion.
+ finalEvents, interruptEvent := consumeUntilInterrupt(iter)
+ assert.Equal(t, 2, len(finalEvents))
+ assert.NotNil(t, interruptEvent)
+}
+
+// TestNestedChatModelAgentWithAgentTool verifies that the shouldFire method correctly prevents
+// duplicate event firing in nested ChatModelAgent scenarios (ChatModelAgent -> AgentTool -> ChatModelAgent).
+// This ensures that only the inner agent's cbHandler fires, not the outer agent's.
+func TestNestedChatModelAgentWithAgentTool(t *testing.T) {
+ ctx := context.Background()
+
+ // Create an interruptible tool for the inner agent
+ innerTool := &myStatefulTool{name: "innerTool", t: t}
+
+ // Create the inner ChatModelAgent that will be wrapped by AgentTool
+ innerAgent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "InnerAgent",
+ Description: "Inner agent with interruptible tool",
+ Model: &myModel{
+ messages: []*schema.Message{
+ schema.AssistantMessage("", []schema.ToolCall{
+ {ID: "1", Function: schema.FunctionCall{Name: "innerTool", Arguments: "{}"}},
+ }),
+ schema.AssistantMessage("inner agent completed", nil),
+ },
+ },
+ ToolsConfig: ToolsConfig{
+ ToolsNodeConfig: compose.ToolsNodeConfig{
+ Tools: []tool.BaseTool{innerTool},
+ },
+ },
+ })
+ assert.NoError(t, err)
+
+ // Wrap the inner agent in an AgentTool
+ agentTool := NewAgentTool(ctx, innerAgent)
+
+ // Create the outer ChatModelAgent that uses the AgentTool
+ outerAgent, err := NewChatModelAgent(ctx, &ChatModelAgentConfig{
+ Name: "OuterAgent",
+ Description: "Outer agent with AgentTool containing inner agent",
+ Model: &myModel{
+ messages: []*schema.Message{
+ schema.AssistantMessage("", []schema.ToolCall{
+ {ID: "1", Function: schema.FunctionCall{Name: "InnerAgent", Arguments: "{}"}},
+ }),
+ schema.AssistantMessage("outer agent completed", nil),
+ },
+ },
+ ToolsConfig: ToolsConfig{
+ ToolsNodeConfig: compose.ToolsNodeConfig{
+ Tools: []tool.BaseTool{agentTool},
+ },
+ },
+ })
+ assert.NoError(t, err)
+
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: outerAgent,
+ CheckPointStore: newMyStore(),
+ })
+
+ // Run the query - this should trigger the nested agent structure
+ iter := runner.Query(ctx, "start", WithCheckPointID("nested-agent-test-1"))
+
+ // Collect all events to verify no duplicates
+ var allEvents []*AgentEvent
+ var interruptEvent *AgentEvent
+
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+
+ if event.Action != nil && event.Action.Interrupted != nil {
+ assert.Nil(t, interruptEvent)
+ interruptEvent = event
+ }
+
+ allEvents = append(allEvents, event)
+ }
+
+ if interruptEvent == nil {
+ t.Fatal("expected an interrupt event")
+ }
+
+ // Verify we got exactly one interrupt event (not duplicated)
+ assert.NotNil(t, interruptEvent, "should have an interrupt event")
+ assert.Equal(t, 1, len(interruptEvent.Action.Interrupted.InterruptContexts),
+ "should have exactly one interrupt context")
+
+ // Verify the interrupt comes from the inner tool, not duplicated
+ interruptCtx := interruptEvent.Action.Interrupted.InterruptContexts[0]
+ assert.True(t, interruptCtx.IsRootCause, "interrupt should be root cause")
+ assert.Equal(t, "interrupt from innerTool", interruptCtx.Info)
+
+ // Verify the address path shows the correct nested structure
+ expectedAddress := Address{
+ {Type: AddressSegmentAgent, ID: "OuterAgent"},
+ {Type: AddressSegmentTool, ID: "InnerAgent", SubID: "1"},
+ {Type: AddressSegmentAgent, ID: "InnerAgent"},
+ {Type: AddressSegmentTool, ID: "innerTool", SubID: "1"},
+ }
+ assert.Equal(t, expectedAddress, interruptCtx.Address,
+ "interrupt address should show correct nested structure")
+
+ // Verify no duplicate events by checking agent names in events
+ var agentNames []string
+ for _, event := range allEvents {
+ if event.AgentName != "" {
+ agentNames = append(agentNames, event.AgentName)
+ }
+ }
+
+ // Should only have events from the outer agent (the inner agent's events should be handled
+ // by the AgentTool and not duplicated by the outer agent's cbHandler)
+ for _, name := range agentNames {
+ assert.Equal(t, "OuterAgent", name,
+ "all events should come from OuterAgent, not duplicated from InnerAgent")
+ }
+
+ // Now resume the interrupt
+ interruptID := interruptCtx.ID
+ iter, err = runner.TargetedResume(ctx, "nested-agent-test-1", map[string]any{
+ interruptID: "resume inner tool",
+ })
+ assert.NoError(t, err)
+
+ // Collect final events after resume
+ var finalEvents []*AgentEvent
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ finalEvents = append(finalEvents, event)
+ }
+
+ // Verify completion events
+ assert.Greater(t, len(finalEvents), 0, "should have completion events after resume")
+
+ // Check that we get the expected completion messages
+ var foundInnerCompletion, foundOuterCompletion bool
+ for _, event := range finalEvents {
+ if event.Output != nil && event.Output.MessageOutput != nil {
+ if event.Output.MessageOutput.Message != nil {
+ content := event.Output.MessageOutput.Message.Content
+ if content == "inner agent completed" {
+ foundInnerCompletion = true
+ } else if content == "outer agent completed" {
+ foundOuterCompletion = true
+ }
+ }
+ }
+ }
+
+ assert.True(t, foundInnerCompletion, "should have inner agent completion")
+ assert.True(t, foundOuterCompletion, "should have outer agent completion")
+}
+
+// consumeUntilInterrupt consumes events from the iterator until an interrupt is found or it's exhausted.
+func consumeUntilInterrupt(iter *AsyncIterator[*AgentEvent]) (normalEvents []*AgentEvent, interruptEvent *AgentEvent) {
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ if event.Action != nil && event.Action.Interrupted != nil {
+ interruptEvent = event
+ continue
+ }
+ normalEvents = append(normalEvents, event)
+ }
+ return
}
diff --git a/adk/prebuilt/planexecute/plan_execute.go b/adk/prebuilt/planexecute/plan_execute.go
index e51830fc..a7b048b6 100644
--- a/adk/prebuilt/planexecute/plan_execute.go
+++ b/adk/prebuilt/planexecute/plan_execute.go
@@ -24,6 +24,7 @@ import (
"strings"
"github.com/bytedance/sonic"
+
"github.com/cloudwego/eino/compose"
"github.com/cloudwego/eino/adk"
diff --git a/adk/prebuilt/supervisor/supervisor.go b/adk/prebuilt/supervisor/supervisor.go
index 5a6bbc8d..ce325c64 100644
--- a/adk/prebuilt/supervisor/supervisor.go
+++ b/adk/prebuilt/supervisor/supervisor.go
@@ -37,14 +37,7 @@ type Config struct {
// sub-agents can only communicate with the supervisor (not with each other directly).
// This hierarchical structure enables complex problem-solving through coordinated agent interactions.
func New(ctx context.Context, conf *Config) (adk.Agent, error) {
- subAgents := make([]adk.Agent, 0, len(conf.SubAgents))
- supervisorName := conf.Supervisor.Name(ctx)
- for _, subAgent := range conf.SubAgents {
- subAgents = append(subAgents, adk.AgentWithDeterministicTransferTo(ctx, &adk.DeterministicTransferConfig{
- Agent: subAgent,
- ToAgentNames: []string{supervisorName},
- }))
- }
+ supervisor := adk.AgentWithOptions(ctx, conf.Supervisor, adk.WithSelfReturnAfterTransfer())
- return adk.SetSubAgents(ctx, conf.Supervisor, subAgents)
+ return adk.SetSubAgents(ctx, supervisor, conf.SubAgents)
}
diff --git a/adk/prebuilt/supervisor/supervisor_test.go b/adk/prebuilt/supervisor/supervisor_test.go
index 07a8f332..9d09df60 100644
--- a/adk/prebuilt/supervisor/supervisor_test.go
+++ b/adk/prebuilt/supervisor/supervisor_test.go
@@ -18,12 +18,14 @@ package supervisor
import (
"context"
+ "fmt"
"testing"
"github.com/stretchr/testify/assert"
"go.uber.org/mock/gomock"
"github.com/cloudwego/eino/adk"
+ "github.com/cloudwego/eino/compose"
mockAdk "github.com/cloudwego/eino/internal/mock/adk"
"github.com/cloudwego/eino/schema"
)
@@ -140,7 +142,7 @@ func TestNewSupervisor(t *testing.T) {
assert.Equal(t, schema.Tool, event.Output.MessageOutput.Role)
assert.Equal(t, "SubAgent2", event.Action.TransferToAgent.DestAgentName)
- // agent1's output
+ // agent2's output
event, ok = aIter.Next()
assert.True(t, ok)
assert.Equal(t, "SubAgent2", event.AgentName)
@@ -167,3 +169,284 @@ func TestNewSupervisor(t *testing.T) {
assert.Equal(t, schema.Assistant, event.Output.MessageOutput.Role)
assert.Equal(t, finishMsg.Content, event.Output.MessageOutput.Message.Content)
}
+
+// mockSupervisor is a simple supervisor that performs concurrent transfers
+type mockSupervisor struct {
+ name string
+ targets []string
+ times int
+}
+
+func (a *mockSupervisor) Name(_ context.Context) string {
+ return a.name
+}
+
+func (a *mockSupervisor) Description(_ context.Context) string {
+ return "mock supervisor agent"
+}
+
+func (a *mockSupervisor) Run(ctx context.Context, input *adk.AgentInput, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ iter, gen := adk.NewAsyncIteratorPair[*adk.AgentEvent]()
+ if a.times > 0 {
+ gen.Send(adk.EventFromMessage(schema.AssistantMessage("job done", nil), nil, schema.Assistant, ""))
+ gen.Close()
+ return iter
+ }
+
+ a.times++
+
+ // Create assistant message with tool call for concurrent transfer
+ toolCall := schema.ToolCall{
+ ID: "transfer-tool-call",
+ Type: "function",
+ Function: schema.FunctionCall{
+ Name: adk.TransferToAgentToolName,
+ Arguments: `{"agent_names":["` + a.targets[0] + `","` + a.targets[1] + `"]}`,
+ },
+ }
+ assistantMsg := schema.AssistantMessage("", []schema.ToolCall{toolCall})
+ gen.Send(adk.EventFromMessage(assistantMsg, nil, schema.Assistant, ""))
+
+ // Create tool message for the transfer
+ toolMsg := schema.ToolMessage(fmt.Sprintf("Successfully transferred to agents %v", a.targets), toolCall.ID,
+ schema.WithToolName(adk.TransferToAgentToolName))
+ transferEvent := adk.EventFromMessage(toolMsg, nil, schema.Tool, toolMsg.ToolName)
+ transferEvent.Action = &adk.AgentAction{
+ ConcurrentTransferToAgent: &adk.ConcurrentTransferToAgentAction{
+ DestAgentNames: a.targets,
+ },
+ }
+ gen.Send(transferEvent)
+ gen.Close()
+
+ return iter
+}
+
+// mockSimpleAgent is a basic agent that returns a simple message
+type mockSimpleAgent struct {
+ name string
+ msg string
+}
+
+func (a *mockSimpleAgent) Name(_ context.Context) string {
+ return a.name
+}
+
+func (a *mockSimpleAgent) Description(_ context.Context) string {
+ return "mock simple agent"
+}
+
+func (a *mockSimpleAgent) Run(ctx context.Context, input *adk.AgentInput, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ iter, gen := adk.NewAsyncIteratorPair[*adk.AgentEvent]()
+ gen.Send(adk.EventFromMessage(schema.AssistantMessage(a.msg, nil), nil, schema.Assistant, ""))
+ gen.Close()
+ return iter
+}
+
+// mockInterruptibleResumableAgent interrupts on first run and resumes on second
+type mockInterruptibleResumableAgent struct {
+ name string
+ t *testing.T
+}
+
+func (a *mockInterruptibleResumableAgent) Name(_ context.Context) string {
+ return a.name
+}
+
+func (a *mockInterruptibleResumableAgent) Description(_ context.Context) string {
+ return "mock interruptible/resumable agent"
+}
+
+func (a *mockInterruptibleResumableAgent) Run(ctx context.Context, input *adk.AgentInput, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ iter, gen := adk.NewAsyncIteratorPair[*adk.AgentEvent]()
+ gen.Send(adk.EventFromMessage(schema.AssistantMessage("I will interrupt", nil), nil, schema.Assistant, ""))
+ gen.Send(adk.Interrupt(ctx, "interrupt data"))
+ gen.Close()
+ return iter
+}
+
+func (a *mockInterruptibleResumableAgent) Resume(ctx context.Context, info *adk.ResumeInfo, opts ...adk.AgentRunOption) *adk.AsyncIterator[*adk.AgentEvent] {
+ assert.True(a.t, info.WasInterrupted)
+
+ // Check if this agent is the target of the resume
+ isResumeTarget, hasData, data := compose.GetResumeContext[string](ctx)
+ if isResumeTarget && hasData {
+ assert.Equal(a.t, "resume data", data)
+ }
+
+ iter, gen := adk.NewAsyncIteratorPair[*adk.AgentEvent]()
+ gen.Send(adk.EventFromMessage(schema.AssistantMessage("I have resumed", nil), nil, schema.Assistant, ""))
+ gen.Close()
+ return iter
+}
+
+// TestNestedSupervisor_ConcurrentTransfer_WithInterruptAndResume tests a complex scenario:
+// - Nested supervisor hierarchy
+// - Concurrent transfers at two levels
+// - Interrupt at grandchild level
+// - Resume with targeted data
+func TestNestedSupervisor_ConcurrentTransfer_WithInterruptAndResume(t *testing.T) {
+ ctx := context.Background()
+
+ // 1. Define the agent hierarchy
+ grandChild1 := &mockSimpleAgent{name: "GrandChild1", msg: "GrandChild1 reporting"}
+ grandChild2 := &mockInterruptibleResumableAgent{name: "GrandChild2", t: t}
+ subSupervisor := &mockSupervisor{name: "SubSupervisor", targets: []string{"GrandChild1", "GrandChild2"}}
+
+ subAgent1 := &mockSimpleAgent{name: "SubAgent1", msg: "SubAgent1 reporting"}
+ superSupervisor := &mockSupervisor{name: "SuperSupervisor", targets: []string{"SubAgent1", "SubSupervisor"}}
+
+ // 2. Build the nested supervisor hierarchy
+ nestedSupervisor, err := New(ctx, &Config{
+ Supervisor: subSupervisor,
+ SubAgents: []adk.Agent{grandChild1, grandChild2},
+ })
+ assert.NoError(t, err)
+
+ topSupervisor, err := New(ctx, &Config{
+ Supervisor: superSupervisor,
+ SubAgents: []adk.Agent{subAgent1, nestedSupervisor},
+ })
+ assert.NoError(t, err)
+
+ // 3. Run the top-level supervisor and expect interrupt
+ runner := adk.NewRunner(ctx, adk.RunnerConfig{Agent: topSupervisor, CheckPointStore: newMyStore()})
+ aIter := runner.Run(ctx, []adk.Message{schema.UserMessage("start")},
+ adk.WithCheckPointID("test-checkpoint"))
+
+ var finalEvent *adk.AgentEvent
+ var events []*adk.AgentEvent
+ for event, ok := aIter.Next(); ok; event, ok = aIter.Next() {
+ var role, content string
+ var toolCalls []schema.ToolCall
+ if event.Output != nil && event.Output.MessageOutput != nil {
+ role = string(event.Output.MessageOutput.Role)
+ content = event.Output.MessageOutput.Message.Content
+ toolCalls = event.Output.MessageOutput.Message.ToolCalls
+ }
+ t.Logf("Event: Agent=%s, Role=%s, Content=%s, ToolCalls= %v, Interrupted=%v, transfer=%v, concurrentTransfer=%v",
+ event.AgentName, role, content, toolCalls,
+ event.Action != nil && event.Action.Interrupted != nil,
+ event.Action != nil && event.Action.TransferToAgent != nil,
+ event.Action != nil && event.Action.ConcurrentTransferToAgent != nil)
+
+ events = append(events, event)
+ if event.Action != nil && event.Action.Interrupted != nil {
+ finalEvent = event
+ }
+ }
+
+ if finalEvent == nil {
+ t.Fatal("Should have received an interrupt event")
+ }
+ assert.Equal(t, "SuperSupervisor", finalEvent.AgentName, "Interrupt should propagate to top supervisor")
+
+ // 4. Verify the execution sequence - handle complex concurrent execution
+ assert.Equal(t, 8, len(events), "Should have 8 events in initial execution")
+
+ // Group events by type and agent for flexible assertions
+ transferEvents := make(map[string]bool)
+ outputEvents := make(map[string]string)
+ interruptEvents := make([]string, 0)
+
+ for _, event := range events {
+ if event.Action != nil && event.Action.ConcurrentTransferToAgent != nil {
+ // Track concurrent transfer events
+ transferEvents[event.AgentName] = true
+ } else if event.Action != nil && event.Action.Interrupted != nil {
+ // Track interrupt events
+ interruptEvents = append(interruptEvents, event.AgentName)
+ } else if event.Output != nil && event.Output.MessageOutput != nil && event.Output.MessageOutput.Message != nil {
+ // Track output events
+ outputEvents[event.AgentName] = event.Output.MessageOutput.Message.Content
+ }
+ }
+
+ // Verify we have the expected concurrent transfers
+ assert.True(t, transferEvents["SuperSupervisor"], "Should have SuperSupervisor concurrent transfer")
+ assert.True(t, transferEvents["SubSupervisor"], "Should have SubSupervisor concurrent transfer")
+
+ // Verify we have the expected outputs from all agents
+ assert.Equal(t, "SubAgent1 reporting", outputEvents["SubAgent1"])
+ assert.Equal(t, "GrandChild1 reporting", outputEvents["GrandChild1"])
+ assert.Equal(t, "I will interrupt", outputEvents["GrandChild2"])
+
+ // Verify interrupt propagation
+ assert.Equal(t, 1, len(interruptEvents), "Should have exactly one interrupt event")
+ assert.Equal(t, "SuperSupervisor", interruptEvents[0], "Interrupt should propagate to top supervisor")
+
+ // 5. Resume the execution with targeted resume data
+ resumeIter, err := runner.TargetedResume(ctx, "test-checkpoint", map[string]any{
+ "GrandChild2": "resume data",
+ })
+ assert.NoError(t, err)
+
+ // 6. Verify the resume flow completes successfully
+ var resumeEvents []*adk.AgentEvent
+ for event, ok := resumeIter.Next(); ok; event, ok = resumeIter.Next() {
+ var role, content string
+ var toolCalls []schema.ToolCall
+ if event.Output != nil && event.Output.MessageOutput != nil {
+ role = string(event.Output.MessageOutput.Role)
+ content = event.Output.MessageOutput.Message.Content
+ toolCalls = event.Output.MessageOutput.Message.ToolCalls
+ }
+ t.Logf("Resume Event: Agent=%s, Role=%s, Content=%s, ToolCalls= %v, Interrupted=%v, transfer=%v, concurrentTransfer=%v",
+ event.AgentName, role, content, toolCalls,
+ event.Action != nil && event.Action.Interrupted != nil,
+ event.Action != nil && event.Action.TransferToAgent != nil,
+ event.Action != nil && event.Action.ConcurrentTransferToAgent != nil)
+ resumeEvents = append(resumeEvents, event)
+ }
+
+ assert.Equal(t, 7, len(resumeEvents), "Should have 7 events in resume execution")
+
+ // Group resume events by type and agent for flexible assertions
+ resumeOutputs := make(map[string]string)
+ resumeTransfers := make(map[string]string)
+ resumeRoles := make(map[string]string)
+
+ for _, event := range resumeEvents {
+ if event.Action != nil && event.Action.TransferToAgent != nil {
+ // Track transfer actions
+ resumeTransfers[event.AgentName] = event.Action.TransferToAgent.DestAgentName
+ } else if event.Output != nil && event.Output.MessageOutput != nil && event.Output.MessageOutput.Message != nil {
+ // Track output events
+ resumeOutputs[event.AgentName] = event.Output.MessageOutput.Message.Content
+ resumeRoles[event.AgentName] = string(event.Output.MessageOutput.Role)
+ }
+ }
+
+ // Verify GrandChild2 resume
+ assert.Equal(t, "I have resumed", resumeOutputs["GrandChild2"])
+
+ // Verify SubSupervisor completion flow
+ assert.Equal(t, "job done", resumeOutputs["SubSupervisor"])
+ assert.Equal(t, "assistant", resumeRoles["SubSupervisor"])
+ assert.Equal(t, "SubSupervisor", resumeTransfers["SubSupervisor"])
+
+ // Verify SuperSupervisor completion flow
+ assert.Equal(t, "job done", resumeOutputs["SuperSupervisor"])
+ assert.Equal(t, "assistant", resumeRoles["SuperSupervisor"])
+ assert.Equal(t, "SuperSupervisor", resumeTransfers["SuperSupervisor"])
+}
+
+func newMyStore() *myStore {
+ return &myStore{
+ m: map[string][]byte{},
+ }
+}
+
+type myStore struct {
+ m map[string][]byte
+}
+
+func (m *myStore) Set(_ context.Context, key string, value []byte) error {
+ m.m[key] = value
+ return nil
+}
+
+func (m *myStore) Get(_ context.Context, key string) ([]byte, bool, error) {
+ v, ok := m.m[key]
+ return v, ok, nil
+}
diff --git a/adk/react.go b/adk/react.go
index 68bcc854..19f7fdc0 100644
--- a/adk/react.go
+++ b/adk/react.go
@@ -38,16 +38,9 @@ type State struct {
AgentName string
- AgentToolInterruptData map[string] /*tool call id*/ *agentToolInterruptInfo
-
RemainingIterations int
}
-type agentToolInterruptInfo struct {
- LastEvent *AgentEvent
- Data []byte
-}
-
func SendToolGenAction(ctx context.Context, toolName string, action *AgentAction) error {
return compose.ProcessState(ctx, func(ctx context.Context, st *State) error {
st.ToolGenActions[toolName] = action
@@ -121,9 +114,8 @@ func getReturnDirectlyToolCallID(ctx context.Context) (string, bool) {
func newReact(ctx context.Context, config *reactConfig) (reactGraph, error) {
genState := func(ctx context.Context) *State {
return &State{
- ToolGenActions: map[string]*AgentAction{},
- AgentName: config.agentName,
- AgentToolInterruptData: make(map[string]*agentToolInterruptInfo),
+ ToolGenActions: map[string]*AgentAction{},
+ AgentName: config.agentName,
RemainingIterations: func() int {
if config.maxIterations <= 0 {
return 20
diff --git a/adk/runctx.go b/adk/runctx.go
index a16a9398..1ecc38ba 100644
--- a/adk/runctx.go
+++ b/adk/runctx.go
@@ -21,24 +21,31 @@ import (
"context"
"encoding/gob"
"fmt"
+ "sort"
"sync"
+ "time"
"github.com/cloudwego/eino/schema"
)
type runSession struct {
- Events []*agentEventWrapper
- Values map[string]any
-
- interruptRunCtxs []*runContext // won't consider concurrency now
+ Events []*agentEventWrapper
+ Values map[string]any
+ LaneEvents *laneEvents
mtx sync.Mutex
}
+type laneEvents struct {
+ Events []*agentEventWrapper
+ Parent *laneEvents
+}
+
type agentEventWrapper struct {
*AgentEvent
mu sync.Mutex
concatenatedMessage Message
+ ts int64
}
type otherAgentEventWrapperForEncode agentEventWrapper
@@ -66,30 +73,6 @@ func newRunSession() *runSession {
}
}
-func getInterruptRunCtxs(ctx context.Context) []*runContext {
- session := getSession(ctx)
- if session == nil {
- return nil
- }
- return session.getInterruptRunCtxs()
-}
-
-func appendInterruptRunCtx(ctx context.Context, interruptRunCtx *runContext) {
- session := getSession(ctx)
- if session == nil {
- return
- }
- session.appendInterruptRunCtx(interruptRunCtx)
-}
-
-func replaceInterruptRunCtx(ctx context.Context, interruptRunCtx *runContext) {
- session := getSession(ctx)
- if session == nil {
- return
- }
- session.replaceInterruptRunCtx(interruptRunCtx)
-}
-
func GetSessionValues(ctx context.Context) map[string]any {
session := getSession(ctx)
if session == nil {
@@ -127,45 +110,55 @@ func GetSessionValue(ctx context.Context, key string) (any, bool) {
}
func (rs *runSession) addEvent(event *AgentEvent) {
- rs.mtx.Lock()
- rs.Events = append(rs.Events, &agentEventWrapper{
- AgentEvent: event,
- })
- rs.mtx.Unlock()
-}
+ wrapper := &agentEventWrapper{AgentEvent: event, ts: time.Now().UnixNano()}
+ // If LaneEvents is not nil, we are in a parallel lane.
+ // Append to the lane's local event slice (lock-free).
+ if rs.LaneEvents != nil {
+ rs.LaneEvents.Events = append(rs.LaneEvents.Events, wrapper)
+ return
+ }
-func (rs *runSession) getEvents() []*agentEventWrapper {
+ // Otherwise, we are on the main path. Append to the shared Events slice (with lock).
rs.mtx.Lock()
- events := rs.Events
+ rs.Events = append(rs.Events, wrapper)
rs.mtx.Unlock()
-
- return events
}
-func (rs *runSession) getInterruptRunCtxs() []*runContext {
- rs.mtx.Lock()
- defer rs.mtx.Unlock()
- return rs.interruptRunCtxs
-}
+func (rs *runSession) getEvents() []*agentEventWrapper {
+ // If there are no in-flight lane events, we can return the main slice directly.
+ if rs.LaneEvents == nil {
+ rs.mtx.Lock()
+ events := rs.Events
+ rs.mtx.Unlock()
+ return events
+ }
-func (rs *runSession) appendInterruptRunCtx(runCtx *runContext) {
+ // If there are in-flight events, we must construct the full view.
+ // First, get the committed history from the main Events slice.
rs.mtx.Lock()
- rs.interruptRunCtxs = append(rs.interruptRunCtxs, runCtx)
+ committedEvents := make([]*agentEventWrapper, len(rs.Events))
+ copy(committedEvents, rs.Events)
rs.mtx.Unlock()
-}
-func (rs *runSession) replaceInterruptRunCtx(interruptRunCtx *runContext) {
- // remove runctx whose path belongs to the new run ctx, and append the new run ctx
- rs.mtx.Lock()
- for i := 0; i < len(rs.interruptRunCtxs); i++ {
- rc := rs.interruptRunCtxs[i]
- if belongToRunPath(interruptRunCtx.RunPath, rc.RunPath) {
- rs.interruptRunCtxs = append(rs.interruptRunCtxs[:i], rs.interruptRunCtxs[i+1:]...)
- i--
+ // Then, assemble the in-flight events by traversing the linked list.
+ // Reading the .Parent pointer is safe without a lock because the parent of a lane is immutable after creation.
+ var laneSlices [][]*agentEventWrapper
+ totalLaneSize := 0
+ for lane := rs.LaneEvents; lane != nil; lane = lane.Parent {
+ if len(lane.Events) > 0 {
+ laneSlices = append(laneSlices, lane.Events)
+ totalLaneSize += len(lane.Events)
}
}
- rs.interruptRunCtxs = append(rs.interruptRunCtxs, interruptRunCtx)
- rs.mtx.Unlock()
+
+ // Combine committed and in-flight history.
+ finalEvents := make([]*agentEventWrapper, 0, len(committedEvents)+totalLaneSize)
+ finalEvents = append(finalEvents, committedEvents...)
+ for i := len(laneSlices) - 1; i >= 0; i-- {
+ finalEvents = append(finalEvents, laneSlices[i]...)
+ }
+
+ return finalEvents
}
func (rs *runSession) getValues() map[string]any {
@@ -247,13 +240,118 @@ func initRunCtx(ctx context.Context, agentName string, input *AgentInput) (conte
}
runCtx.RunPath = append(runCtx.RunPath, RunStep{agentName})
- if runCtx.isRoot() {
+ if runCtx.isRoot() && input != nil {
runCtx.RootInput = input
}
return setRunCtx(ctx, runCtx), runCtx
}
+func joinRunCtxs(parentCtx context.Context, childCtxs ...context.Context) {
+ switch len(childCtxs) {
+ case 0:
+ return
+ case 1:
+ // Optimization for the common case of a single branch.
+ newEvents := unwindLaneEvents(childCtxs...)
+ commitEvents(parentCtx, newEvents)
+ return
+ }
+
+ // 1. Collect all new events from the leaf nodes of each context's lane.
+ newEvents := unwindLaneEvents(childCtxs...)
+
+ // 2. Sort the collected events by their creation timestamp for chronological order.
+ sort.Slice(newEvents, func(i, j int) bool {
+ return newEvents[i].ts < newEvents[j].ts
+ })
+
+ // 3. Commit the sorted events to the parent.
+ commitEvents(parentCtx, newEvents)
+}
+
+// commitEvents appends a slice of new events to the correct parent lane or main event log.
+func commitEvents(ctx context.Context, newEvents []*agentEventWrapper) {
+ runCtx := getRunCtx(ctx)
+ if runCtx == nil || runCtx.Session == nil {
+ // Should not happen, but handle defensively.
+ return
+ }
+
+ // If the context we are committing to is itself a lane, append to its event slice.
+ if runCtx.Session.LaneEvents != nil {
+ runCtx.Session.LaneEvents.Events = append(runCtx.Session.LaneEvents.Events, newEvents...)
+ } else {
+ // Otherwise, commit to the main, shared Events slice with a lock.
+ runCtx.Session.mtx.Lock()
+ runCtx.Session.Events = append(runCtx.Session.Events, newEvents...)
+ runCtx.Session.mtx.Unlock()
+ }
+}
+
+// unwindLaneEvents traverses the LaneEvents of the given contexts and collects
+// all events from the leaf nodes.
+func unwindLaneEvents(ctxs ...context.Context) []*agentEventWrapper {
+ var allNewEvents []*agentEventWrapper
+ for _, ctx := range ctxs {
+ runCtx := getRunCtx(ctx)
+ if runCtx != nil && runCtx.Session != nil && runCtx.Session.LaneEvents != nil {
+ allNewEvents = append(allNewEvents, runCtx.Session.LaneEvents.Events...)
+ }
+ }
+ return allNewEvents
+}
+
+func forkRunCtx(ctx context.Context) context.Context {
+ parentRunCtx := getRunCtx(ctx)
+ if parentRunCtx == nil || parentRunCtx.Session == nil {
+ // Should not happen in a parallel workflow, but handle defensively.
+ return ctx
+ }
+
+ // Create a new session for the child lane by manually copying the parent's session fields.
+ // This is crucial to ensure a new mutex is created and that the LaneEvents pointer is unique.
+ childSession := &runSession{
+ Events: parentRunCtx.Session.Events, // Share the committed history
+ Values: parentRunCtx.Session.Values, // Share the values map
+ }
+
+ // Fork the lane events within the new session struct.
+ childSession.LaneEvents = &laneEvents{
+ Parent: parentRunCtx.Session.LaneEvents,
+ Events: make([]*agentEventWrapper, 0),
+ }
+
+ // Create a new runContext for the child lane, pointing to the new session.
+ childRunCtx := &runContext{
+ RootInput: parentRunCtx.RootInput,
+ RunPath: make([]RunStep, len(parentRunCtx.RunPath)),
+ Session: childSession,
+ }
+ copy(childRunCtx.RunPath, parentRunCtx.RunPath)
+
+ return setRunCtx(ctx, childRunCtx)
+}
+
+// updateRunPathOnly creates a new context with an updated RunPath, but does NOT modify the Address.
+// This is used by sequential workflows to accumulate execution history for LLM context,
+// without incorrectly chaining the static addresses of peer agents.
+func updateRunPathOnly(ctx context.Context, agentNames ...string) context.Context {
+ runCtx := getRunCtx(ctx)
+ if runCtx == nil {
+ // This should not happen in a sequential workflow context, but handle defensively.
+ runCtx = &runContext{Session: newRunSession()}
+ } else {
+ runCtx = runCtx.deepCopy()
+ }
+
+ for _, agentName := range agentNames {
+ runCtx.RunPath = append(runCtx.RunPath, RunStep{agentName})
+ }
+
+ return setRunCtx(ctx, runCtx)
+}
+
// ClearRunCtx clears the run context of the multi-agents. This is particularly useful
// when a customized agent with a multi-agents inside it is set as a subagent of another
// multi-agents. In such cases, it's not expected to pass the outside run context to the
@@ -262,8 +360,8 @@ func ClearRunCtx(ctx context.Context) context.Context {
return context.WithValue(ctx, runCtxKey{}, nil)
}
-func ctxWithNewRunCtx(ctx context.Context) context.Context {
- return setRunCtx(ctx, &runContext{Session: newRunSession()})
+func ctxWithNewRunCtx(ctx context.Context, input *AgentInput) context.Context {
+ return setRunCtx(ctx, &runContext{Session: newRunSession(), RootInput: input})
}
func getSession(ctx context.Context) *runSession {
diff --git a/adk/runctx_test.go b/adk/runctx_test.go
new file mode 100644
index 00000000..7f164b3e
--- /dev/null
+++ b/adk/runctx_test.go
@@ -0,0 +1,425 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package adk
+
+import (
+ "context"
+ "testing"
+ "time"
+
+ "github.com/stretchr/testify/assert"
+
+ "github.com/cloudwego/eino/schema"
+)
+
+func TestSessionValues(t *testing.T) {
+ // Test Case 1: Basic AddSessionValues and GetSessionValues
+ t.Run("BasicSessionValues", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add values to the session
+ values := map[string]any{
+ "key1": "value1",
+ "key2": 42,
+ "key3": true,
+ }
+ AddSessionValues(ctx, values)
+
+ // Get all values from the session
+ retrievedValues := GetSessionValues(ctx)
+
+ // Verify the values were added correctly
+ assert.Equal(t, "value1", retrievedValues["key1"])
+ assert.Equal(t, 42, retrievedValues["key2"])
+ assert.Equal(t, true, retrievedValues["key3"])
+ assert.Len(t, retrievedValues, 3)
+ })
+
+ // Test Case 2: AddSessionValues with empty context
+ t.Run("AddSessionValuesEmptyContext", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Add values to a context without a run session
+ values := map[string]any{
+ "key1": "value1",
+ }
+ AddSessionValues(ctx, values)
+
+ // Get values should return empty map
+ retrievedValues := GetSessionValues(ctx)
+ assert.Empty(t, retrievedValues)
+ })
+
+ // Test Case 3: GetSessionValues with empty context
+ t.Run("GetSessionValuesEmptyContext", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Get values from a context without a run session
+ retrievedValues := GetSessionValues(ctx)
+ assert.Empty(t, retrievedValues)
+ })
+
+ // Test Case 4: AddSessionValues with nil values
+ t.Run("AddSessionValuesNilValues", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add nil values map
+ AddSessionValues(ctx, nil)
+
+ // Get values should still be empty
+ retrievedValues := GetSessionValues(ctx)
+ assert.Empty(t, retrievedValues)
+ })
+
+ // Test Case 5: AddSessionValues with empty values
+ t.Run("AddSessionValuesEmptyValues", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add empty values map
+ AddSessionValues(ctx, map[string]any{})
+
+ // Get values should be empty
+ retrievedValues := GetSessionValues(ctx)
+ assert.Empty(t, retrievedValues)
+ })
+
+ // Test Case 6: AddSessionValues with complex data types
+ t.Run("AddSessionValuesComplexTypes", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add complex values to the session
+ values := map[string]any{
+ "string": "hello world",
+ "int": 123,
+ "float": 45.67,
+ "bool": true,
+ "slice": []string{"a", "b", "c"},
+ "map": map[string]int{"x": 1, "y": 2},
+ "struct": struct{ Name string }{Name: "test"},
+ }
+ AddSessionValues(ctx, values)
+
+ // Get all values from the session
+ retrievedValues := GetSessionValues(ctx)
+
+ // Verify the complex values were added correctly
+ assert.Equal(t, "hello world", retrievedValues["string"])
+ assert.Equal(t, 123, retrievedValues["int"])
+ assert.Equal(t, 45.67, retrievedValues["float"])
+ assert.Equal(t, true, retrievedValues["bool"])
+ assert.Equal(t, []string{"a", "b", "c"}, retrievedValues["slice"])
+ assert.Equal(t, map[string]int{"x": 1, "y": 2}, retrievedValues["map"])
+ assert.Equal(t, struct{ Name string }{Name: "test"}, retrievedValues["struct"])
+ assert.Len(t, retrievedValues, 7)
+ })
+
+ // Test Case 7: AddSessionValues overwrites existing values
+ t.Run("AddSessionValuesOverwrite", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add initial values
+ initialValues := map[string]any{
+ "key1": "initial1",
+ "key2": "initial2",
+ }
+ AddSessionValues(ctx, initialValues)
+
+ // Add values that overwrite some keys
+ overwriteValues := map[string]any{
+ "key1": "overwritten1",
+ "key3": "new3",
+ }
+ AddSessionValues(ctx, overwriteValues)
+
+ // Get all values from the session
+ retrievedValues := GetSessionValues(ctx)
+
+ // Verify the values were overwritten correctly
+ assert.Equal(t, "overwritten1", retrievedValues["key1"]) // overwritten
+ assert.Equal(t, "initial2", retrievedValues["key2"]) // unchanged
+ assert.Equal(t, "new3", retrievedValues["key3"]) // new
+ assert.Len(t, retrievedValues, 3)
+ })
+
+ // Test Case 8: Concurrent access to session values
+ t.Run("ConcurrentSessionValues", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add initial values
+ initialValues := map[string]any{
+ "counter": 0,
+ }
+ AddSessionValues(ctx, initialValues)
+
+ // Simulate concurrent access
+ done := make(chan bool)
+
+ // Goroutine 1: Add values
+ go func() {
+ for i := 0; i < 100; i++ {
+ values := map[string]any{
+ "goroutine1": i,
+ }
+ AddSessionValues(ctx, values)
+ }
+ done <- true
+ }()
+
+ // Goroutine 2: Add different values
+ go func() {
+ for i := 0; i < 100; i++ {
+ values := map[string]any{
+ "goroutine2": i,
+ }
+ AddSessionValues(ctx, values)
+ }
+ done <- true
+ }()
+
+ // Wait for both goroutines to complete
+ <-done
+ <-done
+
+ // Verify that both values were set (last write wins)
+ retrievedValues := GetSessionValues(ctx)
+ assert.Equal(t, 0, retrievedValues["counter"])
+ assert.Equal(t, 99, retrievedValues["goroutine1"])
+ assert.Equal(t, 99, retrievedValues["goroutine2"])
+ })
+
+ // Test Case 9: GetSessionValue individual value
+ t.Run("GetSessionValueIndividual", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add values to the session
+ values := map[string]any{
+ "key1": "value1",
+ "key2": 42,
+ }
+ AddSessionValues(ctx, values)
+
+ // Get individual values
+ value1, exists1 := GetSessionValue(ctx, "key1")
+ value2, exists2 := GetSessionValue(ctx, "key2")
+ value3, exists3 := GetSessionValue(ctx, "nonexistent")
+
+ // Verify individual values
+ assert.True(t, exists1)
+ assert.Equal(t, "value1", value1)
+
+ assert.True(t, exists2)
+ assert.Equal(t, 42, value2)
+
+ assert.False(t, exists3)
+ assert.Nil(t, value3)
+ })
+
+ // Test Case 10: AddSessionValue individual value
+ t.Run("AddSessionValueIndividual", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a run session
+ session := newRunSession()
+ runCtx := &runContext{Session: session}
+ ctx = setRunCtx(ctx, runCtx)
+
+ // Add individual values
+ AddSessionValue(ctx, "key1", "value1")
+ AddSessionValue(ctx, "key2", 42)
+
+ // Get all values
+ retrievedValues := GetSessionValues(ctx)
+
+ // Verify the values were added correctly
+ assert.Equal(t, "value1", retrievedValues["key1"])
+ assert.Equal(t, 42, retrievedValues["key2"])
+ assert.Len(t, retrievedValues, 2)
+ })
+
+ // Test Case 11: AddSessionValue with empty context
+ t.Run("AddSessionValueEmptyContext", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Add individual value to a context without a run session
+ AddSessionValue(ctx, "key1", "value1")
+
+ // Get individual value should return false
+ value, exists := GetSessionValue(ctx, "key1")
+ assert.False(t, exists)
+ assert.Nil(t, value)
+
+ // Get all values should return empty map
+ retrievedValues := GetSessionValues(ctx)
+ assert.Empty(t, retrievedValues)
+ })
+
+ // Test Case 12: Integration with run context initialization
+ t.Run("IntegrationWithRunContext", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Initialize a run context with an agent
+ input := &AgentInput{
+ Messages: []Message{
+ schema.UserMessage("test input"),
+ },
+ }
+ ctx, runCtx := initRunCtx(ctx, "test-agent", input)
+
+ // Verify the run context was created
+ assert.NotNil(t, runCtx)
+ assert.NotNil(t, runCtx.Session)
+
+ // Add values to the session
+ values := map[string]any{
+ "integration_key": "integration_value",
+ }
+ AddSessionValues(ctx, values)
+
+ // Get values from the session
+ retrievedValues := GetSessionValues(ctx)
+ assert.Equal(t, "integration_value", retrievedValues["integration_key"])
+
+ // Verify the run path was set correctly
+ assert.Len(t, runCtx.RunPath, 1)
+ assert.Equal(t, "test-agent", runCtx.RunPath[0].agentName)
+ })
+}
+
+func TestForkJoinRunCtx(t *testing.T) {
+ // Helper to create a named event
+ newEvent := func(name string) *AgentEvent {
+ // Add a small sleep to ensure timestamps are distinct
+ time.Sleep(1 * time.Millisecond)
+ return &AgentEvent{AgentName: name}
+ }
+
+ // Helper to get event names from a slice of wrappers
+ getEventNames := func(wrappers []*agentEventWrapper) []string {
+ names := make([]string, len(wrappers))
+ for i, w := range wrappers {
+ names[i] = w.AgentName
+ }
+ return names
+ }
+
+ // 1. Setup: Create an initial runContext for the main execution path.
+ mainCtx, mainRunCtx := initRunCtx(context.Background(), "Main", nil)
+
+ // 2. Run Agent A
+ eventA := newEvent("A")
+ mainRunCtx.Session.addEvent(eventA)
+ assert.Equal(t, []string{"A"}, getEventNames(mainRunCtx.Session.getEvents()), "After A")
+
+ // 3. Fork for Par(B, C)
+ ctxB := forkRunCtx(mainCtx)
+ ctxC := forkRunCtx(mainCtx)
+
+ // Assertions for Fork
+ runCtxB := getRunCtx(ctxB)
+ runCtxC := getRunCtx(ctxC)
+ assert.NotSame(t, mainRunCtx.Session, runCtxB.Session, "Session B should be a new struct")
+ assert.NotSame(t, mainRunCtx.Session, runCtxC.Session, "Session C should be a new struct")
+ assert.NotSame(t, runCtxB.Session, runCtxC.Session, "Sessions B and C should be different")
+ assert.Nil(t, mainRunCtx.Session.LaneEvents, "Main session should have no lane events yet")
+ assert.NotNil(t, runCtxB.Session.LaneEvents, "Session B should have lane events")
+ assert.NotNil(t, runCtxC.Session.LaneEvents, "Session C should have lane events")
+ assert.Nil(t, runCtxB.Session.LaneEvents.Parent, "Lane B's parent should be the main (nil) lane")
+ assert.Nil(t, runCtxC.Session.LaneEvents.Parent, "Lane C's parent should be the main (nil) lane")
+
+ // 4. Run Agent B
+ eventB := newEvent("B")
+ runCtxB.Session.addEvent(eventB)
+ assert.Equal(t, []string{"A", "B"}, getEventNames(runCtxB.Session.getEvents()), "After B")
+
+ // 5. Run Agent C (and Nested Fork for Par(D, E))
+ eventC1 := newEvent("C1")
+ runCtxC.Session.addEvent(eventC1)
+ assert.Equal(t, []string{"A", "C1"}, getEventNames(runCtxC.Session.getEvents()), "After C1")
+
+ ctxD := forkRunCtx(ctxC)
+ ctxE := forkRunCtx(ctxC)
+
+ // Assertions for Nested Fork
+ runCtxD := getRunCtx(ctxD)
+ runCtxE := getRunCtx(ctxE)
+ assert.NotNil(t, runCtxD.Session.LaneEvents.Parent, "Lane D's parent should be Lane C")
+ assert.Same(t, runCtxC.Session.LaneEvents, runCtxD.Session.LaneEvents.Parent, "Lane D's parent must be Lane C's node")
+ assert.Same(t, runCtxC.Session.LaneEvents, runCtxE.Session.LaneEvents.Parent, "Lane E's parent must be Lane C's node")
+
+ // 6. Run Agents D and E
+ eventD := newEvent("D")
+ runCtxD.Session.addEvent(eventD)
+ eventE := newEvent("E")
+ runCtxE.Session.addEvent(eventE)
+
+ assert.Equal(t, []string{"A", "C1", "D"}, getEventNames(runCtxD.Session.getEvents()), "After D")
+ assert.Equal(t, []string{"A", "C1", "E"}, getEventNames(runCtxE.Session.getEvents()), "After E")
+
+ // 7. Join Par(D, E)
+ joinRunCtxs(ctxC, ctxD, ctxE)
+
+ // Assertions for Nested Join
+ // The events should now be committed to Lane C's event slice.
+ assert.Equal(t, []string{"A", "C1", "D", "E"}, getEventNames(runCtxC.Session.getEvents()), "After joining D and E")
+
+ // 8. Join Par(B, C)
+ joinRunCtxs(mainCtx, ctxB, ctxC)
+
+ // Assertions for Top-Level Join
+ // The events should now be committed to the main session's Events slice.
+ assert.Equal(t, []string{"A", "B", "C1", "D", "E"}, getEventNames(mainRunCtx.Session.getEvents()), "After joining B and C")
+
+ // 9. Run Agent F
+ eventF := newEvent("F")
+ mainRunCtx.Session.addEvent(eventF)
+ assert.Equal(t, []string{"A", "B", "C1", "D", "E", "F"}, getEventNames(mainRunCtx.Session.getEvents()), "After F")
+}
diff --git a/adk/runner.go b/adk/runner.go
index f8fd53af..f5cc6150 100644
--- a/adk/runner.go
+++ b/adk/runner.go
@@ -22,14 +22,21 @@ import (
"runtime/debug"
"github.com/cloudwego/eino/compose"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/internal/safe"
"github.com/cloudwego/eino/schema"
)
+// Runner is the primary entry point for executing an Agent.
+// It manages the agent's lifecycle, including starting, resuming, and checkpointing.
type Runner struct {
- a Agent
+ // a is the agent to be executed.
+ a Agent
+ // enableStreaming dictates whether the execution should be in streaming mode.
enableStreaming bool
- store compose.CheckPointStore
+ // store is the checkpoint store used to persist agent state upon interruption.
+ // If nil, checkpointing is disabled.
+ store compose.CheckPointStore
}
type RunnerConfig struct {
@@ -47,6 +54,10 @@ func NewRunner(_ context.Context, conf RunnerConfig) *Runner {
}
}
+// Run starts a new execution of the agent with a given set of messages.
+// It returns an iterator that yields agent events as they occur.
+// If the Runner was configured with a CheckPointStore, it will automatically save the agent's state
+// upon interruption.
func (r *Runner) Run(ctx context.Context, messages []Message,
opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
o := getCommonOptions(nil, opts...)
@@ -58,7 +69,7 @@ func (r *Runner) Run(ctx context.Context, messages []Message,
EnableStreaming: r.enableStreaming,
}
- ctx = ctxWithNewRunCtx(ctx)
+ ctx = ctxWithNewRunCtx(ctx, input)
AddSessionValues(ctx, o.sessionValues)
@@ -73,39 +84,69 @@ func (r *Runner) Run(ctx context.Context, messages []Message,
return niter
}
-func getInterruptRunCtx(ctx context.Context) *runContext {
- cs := getInterruptRunCtxs(ctx)
- if len(cs) == 0 {
- return nil
- }
- return cs[0] // assume that concurrency isn't existed, so only one run ctx is in ctx
-}
-
+// Query is a convenience method that starts a new execution with a single user query string.
func (r *Runner) Query(ctx context.Context,
query string, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
return r.Run(ctx, []Message{schema.UserMessage(query)}, opts...)
}
-func (r *Runner) Resume(ctx context.Context, checkPointID string, opts ...AgentRunOption) (*AsyncIterator[*AgentEvent], error) {
+// Resume continues an interrupted execution from a checkpoint, using an "Implicit Resume All" strategy.
+// This method is best for simpler use cases where the act of resuming implies that all previously
+// interrupted points should proceed without specific data.
+//
+// When using this method, all interrupted agents will receive `isResumeFlow = false` when they
+// call `GetResumeContext`, as no specific agent was targeted. This is suitable for the "Simple Confirmation"
+// pattern where an agent only needs to know `wasInterrupted` is true to continue.
+func (r *Runner) Resume(ctx context.Context, checkPointID string, opts ...AgentRunOption) (
+ *AsyncIterator[*AgentEvent], error) {
+ return r.resume(ctx, checkPointID, nil, opts...)
+}
+
+// TargetedResume continues an interrupted execution from a checkpoint, using an "Explicit Targeted Resume" strategy.
+// This is the most common and powerful way to resume, allowing you to target specific interrupt points
+// (identified by their address/ID) and provide them with data.
+//
+// The `targets` map should contain the addresses of the components to be resumed as keys. These addresses
+// can point to any interruptible component in the entire execution graph, including ADK agents, compose
+// graph nodes, or tools. The value can be the resume data for that component, or `nil` if no data is needed.
+//
+// When using this method:
+// - Components whose addresses are in the `targets` map will receive `isResumeFlow = true` when they
+// call `GetResumeContext`.
+// - Interrupted components whose addresses are NOT in the `targets` map must decide how to proceed:
+// -- "Leaf" components (the actual root causes of the original interrupt) MUST re-interrupt themselves
+// to preserve their state.
+// -- "Composite" agents (like SequentialAgent or ChatModelAgent) should generally proceed with their
+// execution. They act as conduits, allowing the resume signal to flow to their children. They will
+// naturally re-interrupt if one of their interrupted children re-interrupts, as they receive the
+// new `CompositeInterrupt` signal from them.
+func (r *Runner) TargetedResume(ctx context.Context, checkPointID string, targets map[string]any,
+ opts ...AgentRunOption) (*AsyncIterator[*AgentEvent], error) {
+ return r.resume(ctx, checkPointID, targets, opts...)
+}
+
+// resume is the internal implementation for both Resume and TargetedResume.
+func (r *Runner) resume(ctx context.Context, checkPointID string, resumeData map[string]any,
+ opts ...AgentRunOption) (*AsyncIterator[*AgentEvent], error) {
if r.store == nil {
return nil, fmt.Errorf("failed to resume: store is nil")
}
- runCtx, info, existed, err := getCheckPoint(ctx, r.store, checkPointID)
+ ctx, resumeInfo, err := r.loadCheckPoint(ctx, checkPointID)
if err != nil {
- return nil, fmt.Errorf("failed to get checkpoint: %w", err)
- }
- if !existed {
- return nil, fmt.Errorf("checkpoint[%s] is not existed", checkPointID)
+ return nil, fmt.Errorf("failed to load from checkpoint: %w", err)
}
- ctx = setRunCtx(ctx, runCtx)
-
o := getCommonOptions(nil, opts...)
AddSessionValues(ctx, o.sessionValues)
- aIter := toFlowAgent(ctx, r.a).Resume(ctx, info, opts...)
+ if len(resumeData) > 0 {
+ ctx = core.BatchResumeWithData(ctx, resumeData)
+ }
+
+ fa := toFlowAgent(ctx, r.a)
+ aIter := fa.Resume(ctx, resumeInfo, opts...)
if r.store == nil {
return aIter, nil
}
@@ -116,7 +157,8 @@ func (r *Runner) Resume(ctx context.Context, checkPointID string, opts ...AgentR
return niter, nil
}
-func (r *Runner) handleIter(ctx context.Context, aIter *AsyncIterator[*AgentEvent], gen *AsyncGenerator[*AgentEvent], checkPointID *string) {
+func (r *Runner) handleIter(ctx context.Context, aIter *AsyncIterator[*AgentEvent],
+ gen *AsyncGenerator[*AgentEvent], checkPointID *string) {
defer func() {
panicErr := recover()
if panicErr != nil {
@@ -126,24 +168,47 @@ func (r *Runner) handleIter(ctx context.Context, aIter *AsyncIterator[*AgentEven
gen.Close()
}()
- var interruptedInfo *InterruptInfo
+ var (
+ interruptSignal *core.InterruptSignal
+ legacyData any
+ )
for {
event, ok := aIter.Next()
if !ok {
break
}
- if event.Action != nil && event.Action.Interrupted != nil {
- interruptedInfo = event.Action.Interrupted
- } else {
- interruptedInfo = nil
+ if event.Action != nil && event.Action.internalInterrupted != nil {
+ if interruptSignal != nil {
+ // even if multiple interrupt happens, they should be merged into one
+ // action by CompositeInterrupt, so here in Runner we must assume at most
+ // one interrupt action happens
+ panic("multiple interrupt actions should not happen in Runner")
+ }
+ interruptSignal = event.Action.internalInterrupted
+ interruptContexts := core.ToInterruptContexts(interruptSignal, encapsulateAddress)
+ event = &AgentEvent{
+ AgentName: event.AgentName,
+ RunPath: event.RunPath,
+ Output: event.Output,
+ Action: &AgentAction{
+ Interrupted: &InterruptInfo{
+ Data: event.Action.Interrupted.Data,
+ InterruptContexts: interruptContexts,
+ },
+ internalInterrupted: interruptSignal,
+ },
+ }
+ legacyData = event.Action.Interrupted.Data
}
gen.Send(event)
}
- if interruptedInfo != nil && checkPointID != nil {
- err := saveCheckPoint(ctx, r.store, *checkPointID, getInterruptRunCtx(ctx), interruptedInfo)
+ if interruptSignal != nil && checkPointID != nil {
+ err := r.saveCheckPoint(ctx, *checkPointID, &InterruptInfo{
+ Data: legacyData,
+ }, interruptSignal)
if err != nil {
gen.Send(&AgentEvent{Err: fmt.Errorf("failed to save checkpoint: %w", err)})
}
diff --git a/adk/utils.go b/adk/utils.go
index fb81f894..a6b86152 100644
--- a/adk/utils.go
+++ b/adk/utils.go
@@ -48,6 +48,16 @@ func (ag *AsyncGenerator[T]) Close() {
ag.ch.Close()
}
+func (ag *AsyncGenerator[T]) pipeAll(iter *AsyncIterator[T]) {
+ for {
+ v, ok := iter.Next()
+ if !ok {
+ break
+ }
+ ag.Send(v)
+ }
+}
+
func NewAsyncIteratorPair[T any]() (*AsyncIterator[T], *AsyncGenerator[T]) {
ch := internal.NewUnboundedChan[T]()
return &AsyncIterator[T]{ch}, &AsyncGenerator[T]{ch}
diff --git a/adk/workflow.go b/adk/workflow.go
index 28254a9c..18ecedef 100644
--- a/adk/workflow.go
+++ b/adk/workflow.go
@@ -19,11 +19,12 @@ package adk
import (
"context"
"fmt"
- "reflect"
"runtime/debug"
"sync"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/internal/safe"
+ "github.com/cloudwego/eino/schema"
)
type workflowAgentMode int
@@ -53,7 +54,7 @@ func (a *workflowAgent) Description(_ context.Context) string {
return a.description
}
-func (a *workflowAgent) Run(ctx context.Context, input *AgentInput, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+func (a *workflowAgent) Run(ctx context.Context, _ *AgentInput, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
go func() {
@@ -74,11 +75,11 @@ func (a *workflowAgent) Run(ctx context.Context, input *AgentInput, opts ...Agen
// Different workflow execution based on mode
switch a.mode {
case workflowAgentModeSequential:
- a.runSequential(ctx, input, generator, nil, 0, opts...)
+ err = a.runSequential(ctx, generator, nil, nil, opts...)
case workflowAgentModeLoop:
- a.runLoop(ctx, input, generator, nil, opts...)
+ err = a.runLoop(ctx, generator, nil, nil, opts...)
case workflowAgentModeParallel:
- a.runParallel(ctx, input, generator, nil, opts...)
+ err = a.runParallel(ctx, generator, nil, nil, opts...)
default:
err = fmt.Errorf("unsupported workflow agent mode: %d", a.mode)
}
@@ -87,21 +88,29 @@ func (a *workflowAgent) Run(ctx context.Context, input *AgentInput, opts ...Agen
return iterator
}
-func (a *workflowAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- wi, ok := info.Data.(*WorkflowInterruptInfo)
- if !ok {
- // unreachable
- iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
- generator.Send(&AgentEvent{Err: fmt.Errorf("type of InterruptInfo.Data is expected to %s, actual: %T", reflect.TypeOf((*WorkflowInterruptInfo)(nil)).String(), info.Data)})
- generator.Close()
-
- return iterator
- }
+type sequentialWorkflowState struct {
+ InterruptIndex int
+}
+type parallelWorkflowState struct {
+ SubAgentEvents map[int][]*agentEventWrapper
+}
+
+type loopWorkflowState struct {
+ LoopIterations int
+ SubAgentIndex int
+}
+
+func init() {
+ schema.RegisterName[*sequentialWorkflowState]("eino_adk_sequential_workflow_state")
+ schema.RegisterName[*parallelWorkflowState]("eino_adk_parallel_workflow_state")
+ schema.RegisterName[*loopWorkflowState]("eino_adk_loop_workflow_state")
+}
+
+func (a *workflowAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
iterator, generator := NewAsyncIteratorPair[*AgentEvent]()
go func() {
-
var err error
defer func() {
panicErr := recover()
@@ -115,16 +124,21 @@ func (a *workflowAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...Ag
generator.Close()
}()
- // Different workflow execution based on mode
- switch a.mode {
- case workflowAgentModeSequential:
- a.runSequential(ctx, wi.OrigInput, generator, wi, 0, opts...)
- case workflowAgentModeLoop:
- a.runLoop(ctx, wi.OrigInput, generator, wi, opts...)
- case workflowAgentModeParallel:
- a.runParallel(ctx, wi.OrigInput, generator, wi, opts...)
+ state := info.InterruptState
+ if state == nil {
+ panic(fmt.Sprintf("workflowAgent.Resume: agent '%s' was asked to resume but has no state", a.Name(ctx)))
+ }
+
+ // Different workflow execution based on the type of our restored state.
+ switch s := state.(type) {
+ case *sequentialWorkflowState:
+ err = a.runSequential(ctx, generator, s, info, opts...)
+ case *parallelWorkflowState:
+ err = a.runParallel(ctx, generator, s, info, opts...)
+ case *loopWorkflowState:
+ err = a.runLoop(ctx, generator, s, info, opts...)
default:
- err = fmt.Errorf("unsupported workflow agent mode: %d", a.mode)
+ err = fmt.Errorf("unsupported workflow agent state type: %T", s)
}
}()
return iterator
@@ -141,55 +155,43 @@ type WorkflowInterruptInfo struct {
ParallelInterruptInfo map[int] /*index*/ *InterruptInfo
}
-func (a *workflowAgent) runSequential(ctx context.Context, input *AgentInput,
- generator *AsyncGenerator[*AgentEvent], intInfo *WorkflowInterruptInfo, iterations int /*passed by loop agent*/, opts ...AgentRunOption) (exit, interrupted bool) {
- var runPath []RunStep // reconstruct RunPath each loop
- if iterations > 0 {
- runPath = make([]RunStep, 0, (iterations+1)*len(a.subAgents))
- for iter := 0; iter < iterations; iter++ {
- for j := 0; j < len(a.subAgents); j++ {
- runPath = append(runPath, RunStep{
- agentName: a.subAgents[j].Name(ctx),
- })
- }
- }
- }
+func (a *workflowAgent) runSequential(ctx context.Context,
+ generator *AsyncGenerator[*AgentEvent], seqState *sequentialWorkflowState, info *ResumeInfo,
+ opts ...AgentRunOption) (err error) {
- i := 0
- if intInfo != nil { // restore previous RunPath
- i = intInfo.SequentialInterruptIndex
+ startIdx := 0
- for j := 0; j < i; j++ {
- runPath = append(runPath, RunStep{
- agentName: a.subAgents[j].Name(ctx),
- })
+ // seqCtx tracks the accumulated RunPath across the sequence.
+ seqCtx := ctx
+
+ // If we are resuming, find which sub-agent to start from and prepare its context.
+ if seqState != nil {
+ startIdx = seqState.InterruptIndex
+
+ var steps []string
+ for i := 0; i < startIdx; i++ {
+ steps = append(steps, a.subAgents[i].Name(seqCtx))
}
- }
- runCtx := getRunCtx(ctx)
- nRunCtx := runCtx.deepCopy()
- nRunCtx.RunPath = append(nRunCtx.RunPath, runPath...)
- nCtx := setRunCtx(ctx, nRunCtx)
+ seqCtx = updateRunPathOnly(seqCtx, steps...)
+ }
- for ; i < len(a.subAgents); i++ {
+ for i := startIdx; i < len(a.subAgents); i++ {
subAgent := a.subAgents[i]
var subIterator *AsyncIterator[*AgentEvent]
- if intInfo != nil && i == intInfo.SequentialInterruptIndex {
- nCtx, nRunCtx = initRunCtx(nCtx, subAgent.Name(nCtx), nRunCtx.RootInput)
- enableStreaming := false
- if runCtx.RootInput != nil {
- enableStreaming = runCtx.RootInput.EnableStreaming
- }
- subIterator = subAgent.Resume(nCtx, &ResumeInfo{
- EnableStreaming: enableStreaming,
- InterruptInfo: intInfo.SequentialInterruptInfo,
+ if seqState != nil {
+ subIterator = subAgent.Resume(seqCtx, &ResumeInfo{
+ EnableStreaming: info.EnableStreaming,
+ InterruptInfo: info.Data.(*WorkflowInterruptInfo).SequentialInterruptInfo,
}, opts...)
+ seqState = nil
} else {
- subIterator = subAgent.Run(nCtx, input, opts...)
- nCtx, _ = initRunCtx(nCtx, subAgent.Name(nCtx), input)
+ subIterator = subAgent.Run(seqCtx, nil, opts...)
}
+ seqCtx = updateRunPathOnly(seqCtx, subAgent.Name(seqCtx))
+
var lastActionEvent *AgentEvent
for {
event, ok := subIterator.Next()
@@ -200,7 +202,7 @@ func (a *workflowAgent) runSequential(ctx context.Context, input *AgentInput,
if event.Err != nil {
// exit if report error
generator.Send(event)
- return true, false
+ return nil
}
if lastActionEvent != nil {
@@ -216,57 +218,40 @@ func (a *workflowAgent) runSequential(ctx context.Context, input *AgentInput,
}
if lastActionEvent != nil {
- if lastActionEvent.Action.Interrupted != nil {
- newEvent := wrapWorkflowInterrupt(lastActionEvent, input, i, iterations)
-
- // Reset run ctx,
- // because the control should be transferred to the workflow agent, not the interrupted agent
- replaceInterruptRunCtx(nCtx, runCtx)
+ if lastActionEvent.Action.internalInterrupted != nil {
+ // A sub-agent interrupted. Wrap it with our own state, including the index.
+ state := &sequentialWorkflowState{
+ InterruptIndex: i,
+ }
+ // Use CompositeInterrupt to funnel the sub-interrupt and add our own state.
+ // The context for the composite interrupt must be the one from *before* the sub-agent ran.
+ event := CompositeInterrupt(ctx, "Sequential workflow interrupted", state,
+ lastActionEvent.Action.internalInterrupted)
+
+ // For backward compatibility, populate the deprecated Data field.
+ event.Action.Interrupted.Data = &WorkflowInterruptInfo{
+ OrigInput: getRunCtx(ctx).RootInput,
+ SequentialInterruptIndex: i,
+ SequentialInterruptInfo: lastActionEvent.Action.Interrupted,
+ }
+ event.AgentName = lastActionEvent.AgentName
+ event.RunPath = lastActionEvent.RunPath
- // Forward the event
- generator.Send(newEvent)
- return true, true
+ generator.Send(event)
+ return nil
}
if lastActionEvent.Action.Exit {
// Forward the event
generator.Send(lastActionEvent)
- return true, false
- }
-
- if a.doBreakLoopIfNeeded(lastActionEvent.Action, iterations) {
- lastActionEvent.Action.BreakLoop.CurrentIterations = iterations
- generator.Send(lastActionEvent)
- return true, false
+ return nil
}
generator.Send(lastActionEvent)
}
}
- return false, false
-}
-
-func wrapWorkflowInterrupt(e *AgentEvent, origInput *AgentInput, seqIdx int, iterations int) *AgentEvent {
- newEvent := &AgentEvent{
- AgentName: e.AgentName,
- RunPath: e.RunPath,
- Output: e.Output,
- Action: &AgentAction{
- Exit: e.Action.Exit,
- Interrupted: &InterruptInfo{Data: e.Action.Interrupted.Data},
- TransferToAgent: e.Action.TransferToAgent,
- CustomizedAction: e.Action.CustomizedAction,
- },
- Err: e.Err,
- }
- newEvent.Action.Interrupted.Data = &WorkflowInterruptInfo{
- OrigInput: origInput,
- SequentialInterruptIndex: seqIdx,
- SequentialInterruptInfo: e.Action.Interrupted,
- LoopIterations: iterations,
- }
- return newEvent
+ return nil
}
// BreakLoopAction is a programmatic-only agent action used to prematurely
@@ -308,143 +293,252 @@ func (a *workflowAgent) doBreakLoopIfNeeded(aa *AgentAction, iterations int) boo
return false
}
-func (a *workflowAgent) runLoop(ctx context.Context, input *AgentInput,
- generator *AsyncGenerator[*AgentEvent], intInfo *WorkflowInterruptInfo, opts ...AgentRunOption) {
+func (a *workflowAgent) runLoop(ctx context.Context, generator *AsyncGenerator[*AgentEvent],
+ loopState *loopWorkflowState, resumeInfo *ResumeInfo, opts ...AgentRunOption) (err error) {
if len(a.subAgents) == 0 {
- return
+ return nil
}
- var iterations int
- if intInfo != nil {
- iterations = intInfo.LoopIterations
- }
- for iterations < a.maxIterations || a.maxIterations == 0 {
- exit, interrupted := a.runSequential(ctx, input, generator, intInfo, iterations, opts...)
- if interrupted {
- return
+
+ startIter := 0
+ startIdx := 0
+
+ // loopCtx tracks the accumulated RunPath across the full sequence within a single iteration.
+ loopCtx := ctx
+
+ if loopState != nil {
+ // We are resuming.
+ startIter = loopState.LoopIterations
+ startIdx = loopState.SubAgentIndex
+
+ // Rebuild the loopCtx to have the correct RunPath up to the point of resumption.
+ var steps []string
+ for i := 0; i < startIter; i++ {
+ for _, subAgent := range a.subAgents {
+ steps = append(steps, subAgent.Name(loopCtx))
+ }
}
- if exit {
- return
+ for i := 0; i < startIdx; i++ {
+ steps = append(steps, a.subAgents[i].Name(loopCtx))
}
- intInfo = nil // only effect once
- iterations++
+ loopCtx = updateRunPathOnly(loopCtx, steps...)
}
-}
-func (a *workflowAgent) runParallel(ctx context.Context, input *AgentInput,
- generator *AsyncGenerator[*AgentEvent], intInfo *WorkflowInterruptInfo, opts ...AgentRunOption) {
+ for i := startIter; i < a.maxIterations || a.maxIterations == 0; i++ {
+ for j := startIdx; j < len(a.subAgents); j++ {
+ subAgent := a.subAgents[j]
+
+ var subIterator *AsyncIterator[*AgentEvent]
+ if loopState != nil {
+ // This is the agent we need to resume.
+ subIterator = subAgent.Resume(loopCtx, &ResumeInfo{
+ EnableStreaming: resumeInfo.EnableStreaming,
+ InterruptInfo: resumeInfo.Data.(*WorkflowInterruptInfo).SequentialInterruptInfo,
+ }, opts...)
+ loopState = nil // Only resume the first time.
+ } else {
+ subIterator = subAgent.Run(loopCtx, nil, opts...)
+ }
- if len(a.subAgents) == 0 {
- return
- }
+ loopCtx = updateRunPathOnly(loopCtx, subAgent.Name(loopCtx))
- runners := getRunners(a.subAgents, input, intInfo, opts...)
- var wg sync.WaitGroup
- interruptMap := make(map[int]*InterruptInfo)
- var mu sync.Mutex
- if len(runners) > 1 {
- for i := 1; i < len(runners); i++ {
- wg.Add(1)
- go func(idx int, runner func(ctx context.Context) *AsyncIterator[*AgentEvent]) {
- defer func() {
- panicErr := recover()
- if panicErr != nil {
- e := safe.NewPanicErr(panicErr, debug.Stack())
- generator.Send(&AgentEvent{Err: e})
- }
- wg.Done()
- }()
-
- iterator := runner(ctx)
- for {
- event, ok := iterator.Next()
- if !ok {
- break
+ var lastActionEvent *AgentEvent
+ for {
+ event, ok := subIterator.Next()
+ if !ok {
+ break
+ }
+
+ if lastActionEvent != nil {
+ generator.Send(lastActionEvent)
+ lastActionEvent = nil
+ }
+
+ if event.Action != nil {
+ lastActionEvent = event
+ continue
+ }
+ generator.Send(event)
+ }
+
+ if lastActionEvent != nil {
+ if lastActionEvent.Action.internalInterrupted != nil {
+ // A sub-agent interrupted. Wrap it with our own loop state.
+ state := &loopWorkflowState{
+ LoopIterations: i,
+ SubAgentIndex: j,
}
- if event.Action != nil && event.Action.Interrupted != nil {
- mu.Lock()
- interruptMap[idx] = event.Action.Interrupted
- mu.Unlock()
- break
+ // Use CompositeInterrupt to funnel the sub-interrupt and add our own state.
+ event := CompositeInterrupt(ctx, "Loop workflow interrupted", state,
+ lastActionEvent.Action.internalInterrupted)
+
+ // For backward compatibility, populate the deprecated Data field.
+ event.Action.Interrupted.Data = &WorkflowInterruptInfo{
+ OrigInput: getRunCtx(ctx).RootInput,
+ LoopIterations: i,
+ SequentialInterruptIndex: j,
+ SequentialInterruptInfo: lastActionEvent.Action.Interrupted,
}
- // Forward the event
+ event.AgentName = lastActionEvent.AgentName
+ event.RunPath = lastActionEvent.RunPath
+
generator.Send(event)
+ return
+ }
+
+ if lastActionEvent.Action.Exit {
+ generator.Send(lastActionEvent)
+ return
+ }
+
+ if a.doBreakLoopIfNeeded(lastActionEvent.Action, i) {
+ generator.Send(lastActionEvent)
+ return
}
- }(i, runners[i])
+
+ generator.Send(lastActionEvent)
+ }
}
+
+ // Reset the sub-agent index for the next iteration of the outer loop.
+ startIdx = 0
}
- runner := runners[0]
- iterator := runner(ctx)
- for {
- event, ok := iterator.Next()
- if !ok {
- break
+ return nil
+}
+
+func (a *workflowAgent) runParallel(ctx context.Context, generator *AsyncGenerator[*AgentEvent],
+ parState *parallelWorkflowState, resumeInfo *ResumeInfo, opts ...AgentRunOption) error {
+
+ if len(a.subAgents) == 0 {
+ return nil
+ }
+
+ var (
+ wg sync.WaitGroup
+ subInterruptSignals []*core.InterruptSignal
+ dataMap = make(map[int]*InterruptInfo)
+ mu sync.Mutex
+ agentNames map[string]bool
+ err error
+ childContexts = make([]context.Context, len(a.subAgents))
+ )
+
+ // If resuming, get the scoped ResumeInfo for each child that needs to be resumed.
+ if parState != nil {
+ agentNames, err = getNextResumeAgents(ctx, resumeInfo)
+ if err != nil {
+ return err
}
- if event.Action != nil && event.Action.Interrupted != nil {
- mu.Lock()
- interruptMap[0] = event.Action.Interrupted
- mu.Unlock()
- break
+ }
+
+ // Fork contexts for each sub-agent
+ for i := range a.subAgents {
+ childContexts[i] = forkRunCtx(ctx)
+
+ // If we're resuming and this agent has existing events, add them to the child context
+ if parState != nil && parState.SubAgentEvents != nil {
+ if existingEvents, ok := parState.SubAgentEvents[i]; ok {
+ // Add existing events to the child's lane events
+ childRunCtx := getRunCtx(childContexts[i])
+ if childRunCtx != nil && childRunCtx.Session != nil {
+ if childRunCtx.Session.LaneEvents == nil {
+ childRunCtx.Session.LaneEvents = &laneEvents{}
+ }
+ childRunCtx.Session.LaneEvents.Events = append(childRunCtx.Session.LaneEvents.Events, existingEvents...)
+ }
+ }
}
- // Forward the event
- generator.Send(event)
}
- if len(a.subAgents) > 1 {
- wg.Wait()
+ for i := range a.subAgents {
+ wg.Add(1)
+ go func(idx int, agent *flowAgent) {
+ defer func() {
+ panicErr := recover()
+ if panicErr != nil {
+ e := safe.NewPanicErr(panicErr, debug.Stack())
+ generator.Send(&AgentEvent{Err: e})
+ }
+ wg.Done()
+ }()
+
+ var iterator *AsyncIterator[*AgentEvent]
+
+ if _, ok := agentNames[agent.Name(ctx)]; ok {
+ // This branch was interrupted and needs to be resumed.
+ iterator = agent.Resume(childContexts[idx], &ResumeInfo{
+ EnableStreaming: resumeInfo.EnableStreaming,
+ InterruptInfo: resumeInfo.Data.(*WorkflowInterruptInfo).ParallelInterruptInfo[idx],
+ }, opts...)
+ } else if parState != nil {
+ // We are resuming, but this child is not in the next points map.
+ // This means it finished successfully, so we don't run it.
+ return
+ } else {
+ iterator = agent.Run(childContexts[idx], nil, opts...)
+ }
+
+ for {
+ event, ok := iterator.Next()
+ if !ok {
+ break
+ }
+ if event.Action != nil && event.Action.internalInterrupted != nil {
+ mu.Lock()
+ subInterruptSignals = append(subInterruptSignals, event.Action.internalInterrupted)
+ dataMap[idx] = event.Action.Interrupted
+ mu.Unlock()
+ break
+ }
+ generator.Send(event)
+ }
+ }(i, a.subAgents[i])
}
- if len(interruptMap) > 0 {
- replaceInterruptRunCtx(ctx, getRunCtx(ctx))
- generator.Send(&AgentEvent{
- AgentName: a.Name(ctx),
- RunPath: getRunCtx(ctx).RunPath,
- Action: &AgentAction{
- Interrupted: &InterruptInfo{
- Data: &WorkflowInterruptInfo{
- OrigInput: input,
- ParallelInterruptInfo: interruptMap,
- },
- },
- },
- })
+ wg.Wait()
+
+ if len(subInterruptSignals) == 0 {
+ // Join all child contexts back to the parent
+ joinRunCtxs(ctx, childContexts...)
+ return nil
}
-}
-func getRunners(subAgents []*flowAgent, input *AgentInput, intInfo *WorkflowInterruptInfo, opts ...AgentRunOption) []func(ctx context.Context) *AsyncIterator[*AgentEvent] {
- ret := make([]func(ctx context.Context) *AsyncIterator[*AgentEvent], 0, len(subAgents))
- if intInfo == nil {
- // init run
- for _, subAgent := range subAgents {
- sa := subAgent
- ret = append(ret, func(ctx context.Context) *AsyncIterator[*AgentEvent] {
- return sa.Run(ctx, input, opts...)
- })
+ if len(subInterruptSignals) > 0 {
+ // Before interrupting, collect the current events from each child context
+ subAgentEvents := make(map[int][]*agentEventWrapper)
+ for i, childCtx := range childContexts {
+ childRunCtx := getRunCtx(childCtx)
+ if childRunCtx != nil && childRunCtx.Session != nil && childRunCtx.Session.LaneEvents != nil {
+ // COPY events before storing (streams can only be consumed once)
+ subAgentEvents[i] = make([]*agentEventWrapper, len(childRunCtx.Session.LaneEvents.Events))
+ for j, event := range childRunCtx.Session.LaneEvents.Events {
+ copied := copyAgentEvent(event.AgentEvent)
+ setAutomaticClose(copied)
+ subAgentEvents[i][j] = &agentEventWrapper{
+ AgentEvent: copied,
+ }
+ }
+ }
}
- return ret
- }
- // resume
- for i, subAgent := range subAgents {
- sa := subAgent
- info, ok := intInfo.ParallelInterruptInfo[i]
- if !ok {
- // have executed
- continue
+
+ state := ¶llelWorkflowState{
+ SubAgentEvents: subAgentEvents,
}
- ret = append(ret, func(ctx context.Context) *AsyncIterator[*AgentEvent] {
- nCtx, runCtx := initRunCtx(ctx, sa.Name(ctx), input)
- enableStreaming := false
- if runCtx.RootInput != nil {
- enableStreaming = runCtx.RootInput.EnableStreaming
- }
- return sa.Resume(nCtx, &ResumeInfo{
- EnableStreaming: enableStreaming,
- InterruptInfo: info,
- }, opts...)
- })
+ event := CompositeInterrupt(ctx, "Parallel workflow interrupted", state, subInterruptSignals...)
+
+ // For backward compatibility, populate the deprecated Data field.
+ event.Action.Interrupted.Data = &WorkflowInterruptInfo{
+ OrigInput: getRunCtx(ctx).RootInput,
+ ParallelInterruptInfo: dataMap,
+ }
+ event.AgentName = a.Name(ctx)
+ event.RunPath = getRunCtx(ctx).RunPath
+
+ generator.Send(event)
}
- return ret
+
+ return nil
}
type SequentialAgentConfig struct {
@@ -493,14 +587,14 @@ func newWorkflowAgent(ctx context.Context, name, desc string,
return fa, nil
}
-func NewSequentialAgent(ctx context.Context, config *SequentialAgentConfig) (Agent, error) {
+func NewSequentialAgent(ctx context.Context, config *SequentialAgentConfig) (ResumableAgent, error) {
return newWorkflowAgent(ctx, config.Name, config.Description, config.SubAgents, workflowAgentModeSequential, 0)
}
-func NewParallelAgent(ctx context.Context, config *ParallelAgentConfig) (Agent, error) {
+func NewParallelAgent(ctx context.Context, config *ParallelAgentConfig) (ResumableAgent, error) {
return newWorkflowAgent(ctx, config.Name, config.Description, config.SubAgents, workflowAgentModeParallel, 0)
}
-func NewLoopAgent(ctx context.Context, config *LoopAgentConfig) (Agent, error) {
+func NewLoopAgent(ctx context.Context, config *LoopAgentConfig) (ResumableAgent, error) {
return newWorkflowAgent(ctx, config.Name, config.Description, config.SubAgents, workflowAgentModeLoop, config.MaxIterations)
}
diff --git a/adk/workflow_test.go b/adk/workflow_test.go
index 06b4669a..cf21dcaa 100644
--- a/adk/workflow_test.go
+++ b/adk/workflow_test.go
@@ -118,6 +118,9 @@ func TestSequentialAgent(t *testing.T) {
},
}
+ // Initialize the run context
+ ctx, _ = initRunCtx(ctx, sequentialAgent.Name(ctx), input)
+
iterator := sequentialAgent.Run(ctx, input)
assert.NotNil(t, iterator)
@@ -204,6 +207,8 @@ func TestSequentialAgentWithExit(t *testing.T) {
},
}
+ ctx, _ = initRunCtx(ctx, sequentialAgent.Name(ctx), input)
+
iterator := sequentialAgent.Run(ctx, input)
assert.NotNil(t, iterator)
@@ -265,13 +270,15 @@ func TestParallelAgent(t *testing.T) {
assert.NotNil(t, parallelAgent)
// Run the parallel agent
- input := AgentInput{
+ input := &AgentInput{
Messages: []Message{
schema.UserMessage("Test input"),
},
}
- iterator := parallelAgent.Run(ctx, &input)
+ ctx, _ = initRunCtx(ctx, parallelAgent.Name(ctx), input)
+
+ iterator := parallelAgent.Run(ctx, input)
assert.NotNil(t, iterator)
// Collect all events
@@ -346,6 +353,8 @@ func TestLoopAgent(t *testing.T) {
},
}
+ ctx, _ = initRunCtx(ctx, loopAgent.Name(ctx), input)
+
iterator := loopAgent.Run(ctx, input)
assert.NotNil(t, iterator)
@@ -411,6 +420,7 @@ func TestLoopAgentWithBreakLoop(t *testing.T) {
schema.UserMessage("Test input"),
},
}
+ ctx, _ = initRunCtx(ctx, loopAgent.Name(ctx), input)
iterator := loopAgent.Run(ctx, input)
assert.NotNil(t, iterator)
@@ -476,6 +486,7 @@ func TestWorkflowAgentPanicRecovery(t *testing.T) {
},
}
+ ctx, _ = initRunCtx(ctx, sequentialAgent.Name(ctx), input)
iterator := sequentialAgent.Run(ctx, input)
assert.NotNil(t, iterator)
@@ -496,153 +507,533 @@ type panicMockAgent struct {
mockAgent
}
-func (a *panicMockAgent) Run(ctx context.Context, input *AgentInput, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+func (a *panicMockAgent) Run(_ context.Context, _ *AgentInput, _ ...AgentRunOption) *AsyncIterator[*AgentEvent] {
panic("test panic in agent")
}
-type panicResumableMockAgent struct {
- mockAgent
-}
-
-func (a *panicResumableMockAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- panic("test panic in resume")
-}
+func TestParallelWorkflowResumeWithEvents(t *testing.T) {
+ ctx := context.Background()
-// Remove the old mockResumableAgent type and replace it with panicResumableMockAgent
+ // Create interruptible agents
+ sa1 := &myAgent{
+ name: "sa1",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ // Send a normal message event first, called event1
+ generator.Send(&AgentEvent{
+ AgentName: "sa1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa1 normal message"),
+ },
+ },
+ })
+ intEvent := Interrupt(ctx, "sa1 interrupt data")
+ generator.Send(intEvent)
+ generator.Close()
+ return iter
+ },
+ resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ assert.True(t, info.WasInterrupted)
+ assert.Nil(t, info.InterruptState)
+ assert.True(t, info.IsResumeTarget)
+ assert.Equal(t, "resume sa1", info.ResumeData)
+
+ // Get the events from session and verify visibility
+ runCtx := getRunCtx(ctx)
+ assert.NotNil(t, runCtx.Session, "sa1 resumer should have session")
+ allEvents := runCtx.Session.getEvents()
+
+ // Assert that allEvents only have 1 event, that is event1
+ assert.Equal(t, 1, len(allEvents), "sa1 should only see its own event in session")
+ assert.Equal(t, "sa1", allEvents[0].AgentEvent.AgentName, "sa1 should see its own event")
+ assert.Equal(t, "sa1 normal message", allEvents[0].AgentEvent.Output.MessageOutput.Message.Content, "sa1 should see its own message content")
+
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Close()
+ return iter
+ },
+ }
-// TestWorkflowAgentUnsupportedMode tests unsupported workflow mode error (lines 65-71)
-func TestWorkflowAgentUnsupportedMode(t *testing.T) {
- ctx := context.Background()
+ sa2 := &myAgent{
+ name: "sa2",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ // Send a normal message event first, called event2
+ generator.Send(&AgentEvent{
+ AgentName: "sa2",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa2 normal message"),
+ },
+ },
+ })
+ intEvent := StatefulInterrupt(ctx, "sa2 interrupt data", "sa2 interrupt")
+ generator.Send(intEvent)
+ generator.Close()
+ return iter
+ },
+ resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ assert.True(t, info.WasInterrupted)
+ assert.NotNil(t, info.InterruptState)
+ assert.Equal(t, "sa2 interrupt", info.InterruptState)
+ assert.True(t, info.IsResumeTarget)
+ assert.Equal(t, "resume sa2", info.ResumeData)
+
+ // Get the events from session and verify visibility
+ runCtx := getRunCtx(ctx)
+ assert.NotNil(t, runCtx.Session, "sa2 resumer should have session")
+ allEvents := runCtx.Session.getEvents()
+
+ // Assert that allEvents only have 1 event, that is event2
+ assert.Equal(t, 1, len(allEvents), "sa2 should only see its own event in session")
+ assert.Equal(t, "sa2", allEvents[0].AgentEvent.AgentName, "sa2 should see its own event")
+ assert.Equal(t, "sa2 normal message", allEvents[0].AgentEvent.Output.MessageOutput.Message.Content, "sa2 should see its own message content")
+
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Close()
+ return iter
+ },
+ }
- // Create a workflow agent with unsupported mode
- agent := &workflowAgent{
- name: "UnsupportedModeAgent",
- description: "Agent with unsupported mode",
- subAgents: []*flowAgent{},
- mode: workflowAgentMode(999), // Invalid mode
+ sa3 := &myAgent{
+ name: "sa3",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Send(&AgentEvent{
+ AgentName: "sa3",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa3 completed"),
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
}
- // Run the agent and expect error
- input := &AgentInput{
- Messages: []Message{
- schema.UserMessage("Test input"),
+ sa4 := &myAgent{
+ name: "sa4",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Send(&AgentEvent{
+ AgentName: "sa4",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("sa4 completed"),
+ },
+ },
+ })
+ generator.Close()
+ return iter
},
}
- iterator := agent.Run(ctx, input)
- assert.NotNil(t, iterator)
+ t.Run("test parallel workflow agent", func(t *testing.T) {
+ // parallel
+ a, err := NewParallelAgent(ctx, &ParallelAgentConfig{
+ Name: "parallel agent",
+ SubAgents: []Agent{sa1, sa2, sa3, sa4},
+ })
+ assert.NoError(t, err)
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: a,
+ CheckPointStore: newMyStore(),
+ })
+ iter := runner.Query(ctx, "hello world", WithCheckPointID("1"))
+ var (
+ events []*AgentEvent
+ interruptEvent *AgentEvent
+ )
+
+ for {
+ event, ok := iter.Next()
+ if !ok {
+ break
+ }
+ if event.Action != nil && event.Action.Interrupted != nil {
+ interruptEvent = event
+ continue
+ }
+ events = append(events, event)
+ }
+ assert.Equal(t, 4, len(events), "should have 4 events (2 normal messages + 2 completed agents)")
+
+ // Verify specific properties of each event
+ var sa3Event, sa4Event *AgentEvent
+ for _, event := range events {
+ if event.AgentName == "sa3" {
+ sa3Event = event
+ } else if event.AgentName == "sa4" {
+ sa4Event = event
+ }
+ }
- // Should receive an error event due to unsupported mode
- event, ok := iterator.Next()
- assert.True(t, ok)
- assert.NotNil(t, event)
- assert.NotNil(t, event.Err)
- assert.Contains(t, event.Err.Error(), "unsupported workflow agent mode")
+ // Verify sa3 event properties
+ assert.NotNil(t, sa3Event, "should have event from sa3")
+ assert.Equal(t, "sa3", sa3Event.AgentName, "sa3 event should have correct agent name")
+ assert.Equal(t, []RunStep{{"parallel agent"}, {"sa3"}}, sa3Event.RunPath, "sa3 event should have correct run path")
+ assert.NotNil(t, sa3Event.Output, "sa3 event should have output")
+ assert.NotNil(t, sa3Event.Output.MessageOutput, "sa3 event should have message output")
+ assert.Equal(t, "sa3 completed", sa3Event.Output.MessageOutput.Message.Content, "sa3 event should have correct message content")
+
+ // Verify sa4 event properties
+ assert.NotNil(t, sa4Event, "should have event from sa4")
+ assert.Equal(t, "sa4", sa4Event.AgentName, "sa4 event should have correct agent name")
+ assert.Equal(t, []RunStep{{"parallel agent"}, {"sa4"}}, sa4Event.RunPath, "sa4 event should have correct run path")
+ assert.NotNil(t, sa4Event.Output, "sa4 event should have output")
+ assert.NotNil(t, sa4Event.Output.MessageOutput, "sa4 event should have message output")
+ assert.Equal(t, "sa4 completed", sa4Event.Output.MessageOutput.Message.Content, "sa4 event should have correct message content")
+
+ assert.NotNil(t, interruptEvent)
+ assert.Equal(t, "parallel agent", interruptEvent.AgentName)
+ assert.Equal(t, []RunStep{{"parallel agent"}}, interruptEvent.RunPath)
+ assert.NotNil(t, interruptEvent.Action.Interrupted)
+
+ var sa1InfoFound, sa2InfoFound bool
+ for _, ctx := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if ctx.Info == "sa1 interrupt data" {
+ sa1InfoFound = true
+ } else if ctx.Info == "sa2 interrupt data" {
+ sa2InfoFound = true
+ }
+ }
- // No more events
- _, ok = iterator.Next()
- assert.False(t, ok)
+ assert.Equal(t, 2, len(interruptEvent.Action.Interrupted.InterruptContexts))
+ assert.True(t, sa1InfoFound)
+ assert.True(t, sa2InfoFound)
+
+ var parallelInterruptID1, parallelInterruptID2 string
+ for _, ctx := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if ctx.Info == "sa1 interrupt data" {
+ parallelInterruptID1 = ctx.ID
+ } else if ctx.Info == "sa2 interrupt data" {
+ parallelInterruptID2 = ctx.ID
+ }
+ }
+ assert.NotEmpty(t, parallelInterruptID1)
+ assert.NotEmpty(t, parallelInterruptID2)
+
+ iter, err = runner.TargetedResume(ctx, "1", map[string]any{
+ parallelInterruptID1: "resume sa1",
+ parallelInterruptID2: "resume sa2",
+ })
+ assert.NoError(t, err)
+ _, ok := iter.Next()
+ assert.False(t, ok)
+ })
}
-// TestWorkflowAgentResumePanicRecovery tests panic recovery in Resume method (lines 108-115)
-func TestWorkflowAgentResumePanicRecovery(t *testing.T) {
+func TestNestedParallelWorkflow(t *testing.T) {
ctx := context.Background()
- // Create a mock resumable agent that panics on Resume
- panicAgent := &mockResumableAgent{
- mockAgent: mockAgent{
- name: "PanicResumeAgent",
- description: "Agent that panics on resume",
- responses: []*AgentEvent{},
+ // Create predecessor agent that runs before the parallel structure
+ predecessorAgent := &myAgent{
+ name: "predecessor",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Send(&AgentEvent{
+ AgentName: "predecessor",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("predecessor completed"),
+ },
+ },
+ })
+ generator.Close()
+ return iter
},
}
- // Create a sequential agent with the panic agent
- config := &SequentialAgentConfig{
- Name: "ResumeTestAgent",
- Description: "Test agent for resume panic",
- SubAgents: []Agent{panicAgent},
+ // Create interruptible inner agents
+ innerAgent1 := &myAgent{
+ name: "inner1",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Verify inner1 can see predecessor's event
+ runCtx := getRunCtx(ctx)
+ allEvents := runCtx.Session.getEvents()
+ assert.Equal(t, 1, len(allEvents), "inner1 should see exactly 1 event (predecessor)")
+
+ assert.Equal(t, "predecessor", allEvents[0].AgentEvent.AgentName, "inner1 should see predecessor event")
+ assert.Equal(t, "predecessor completed", allEvents[0].AgentEvent.Output.MessageOutput.Message.Content, "inner1 should see predecessor message content")
+
+ generator.Send(&AgentEvent{
+ AgentName: "inner1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("inner1 normal"),
+ },
+ },
+ })
+ intEvent := Interrupt(ctx, "inner1 interrupt")
+ generator.Send(intEvent)
+ generator.Close()
+ return iter
+ },
+ resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ assert.True(t, info.WasInterrupted)
+ assert.Equal(t, "resume inner1", info.ResumeData)
+
+ // Verify inner1 can see predecessor's event during resume
+ runCtx := getRunCtx(ctx)
+ allEvents := runCtx.Session.getEvents()
+ assert.Equal(t, 2, len(allEvents), "inner1 should see exactly 2 events (predecessor + own normal message) during resume")
+
+ // Find and verify predecessor event
+ var foundPredecessor bool
+ for _, event := range allEvents {
+ if event.AgentEvent != nil && event.AgentEvent.AgentName == "predecessor" {
+ foundPredecessor = true
+ assert.Equal(t, "predecessor completed", event.AgentEvent.Output.MessageOutput.Message.Content)
+ }
+ }
+ assert.True(t, foundPredecessor, "inner1 should see predecessor event during resume")
+
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Close()
+ return iter
+ },
}
- sequentialAgent, err := NewSequentialAgent(ctx, config)
+ innerAgent2 := &myAgent{
+ name: "inner2",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Verify inner2 can see predecessor's event
+ runCtx := getRunCtx(ctx)
+ allEvents := runCtx.Session.getEvents()
+ assert.Equal(t, 1, len(allEvents), "inner2 should see exactly 1 event (predecessor)")
+
+ assert.Equal(t, "predecessor", allEvents[0].AgentEvent.AgentName, "inner2 should see predecessor event")
+ assert.Equal(t, "predecessor completed", allEvents[0].AgentEvent.Output.MessageOutput.Message.Content, "inner2 should see predecessor message content")
+
+ generator.Send(&AgentEvent{
+ AgentName: "inner2",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("inner2 normal"),
+ },
+ },
+ })
+ intEvent := StatefulInterrupt(ctx, "inner2 interrupt", "inner2 state")
+ generator.Send(intEvent)
+ generator.Close()
+ return iter
+ },
+ resumer: func(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ assert.True(t, info.WasInterrupted)
+ assert.Equal(t, "inner2 state", info.InterruptState)
+ assert.Equal(t, "resume inner2", info.ResumeData)
+
+ // Verify inner2 can see predecessor's event during resume
+ runCtx := getRunCtx(ctx)
+ allEvents := runCtx.Session.getEvents()
+ assert.Equal(t, 2, len(allEvents), "inner2 should see exactly 2 events (predecessor + own normal message) during resume")
+
+ // Find and verify predecessor event
+ var foundPredecessor bool
+ for _, event := range allEvents {
+ if event.AgentEvent != nil && event.AgentEvent.AgentName == "predecessor" {
+ foundPredecessor = true
+ assert.Equal(t, "predecessor completed", event.AgentEvent.Output.MessageOutput.Message.Content)
+ }
+ }
+ assert.True(t, foundPredecessor, "inner2 should see predecessor event during resume")
+
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Close()
+ return iter
+ },
+ }
+
+ // Create inner parallel workflow
+ innerParallel, err := NewParallelAgent(ctx, &ParallelAgentConfig{
+ Name: "inner parallel",
+ SubAgents: []Agent{innerAgent1, innerAgent2},
+ })
assert.NoError(t, err)
- // Initialize context with run context - this is the key fix
- ctx = ctxWithNewRunCtx(ctx)
+ // Create simple outer agents
+ outerAgent1 := &myAgent{
+ name: "outer1",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Send(&AgentEvent{
+ AgentName: "outer1",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("outer1 completed"),
+ },
+ },
+ })
+ generator.Close()
+ return iter
+ },
+ }
- // Create valid resume info
- resumeInfo := &ResumeInfo{
- EnableStreaming: false,
- InterruptInfo: &InterruptInfo{
- Data: &WorkflowInterruptInfo{
- OrigInput: &AgentInput{
- Messages: []Message{schema.UserMessage("test")},
+ outerAgent2 := &myAgent{
+ name: "outer2",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+ generator.Send(&AgentEvent{
+ AgentName: "outer2",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("outer2 completed"),
+ },
},
- SequentialInterruptIndex: 0,
- SequentialInterruptInfo: &InterruptInfo{
- Data: "some interrupt data",
+ })
+ generator.Close()
+ return iter
+ },
+ }
+
+ // Create outer parallel workflow with nested parallel agent
+ outerParallel, err := NewParallelAgent(ctx, &ParallelAgentConfig{
+ Name: "outer parallel",
+ SubAgents: []Agent{outerAgent1, innerParallel, outerAgent2},
+ })
+ assert.NoError(t, err)
+
+ // Create successor agent that runs after the parallel structure
+ successorAgent := &myAgent{
+ name: "successor",
+ runner: func(ctx context.Context, input *AgentInput, options ...AgentRunOption) *AsyncIterator[*AgentEvent] {
+ iter, generator := NewAsyncIteratorPair[*AgentEvent]()
+
+ // Verify successor can see all events from predecessor and parallel agents
+ runCtx := getRunCtx(ctx)
+ allEvents := runCtx.Session.getEvents()
+ assert.GreaterOrEqual(t, len(allEvents), 5, "successor should see all events")
+
+ var foundPredecessor, foundOuter1, foundOuter2, foundInner1, foundInner2 bool
+ for _, event := range allEvents {
+ if event.AgentEvent != nil {
+ switch event.AgentEvent.AgentName {
+ case "predecessor":
+ foundPredecessor = true
+ assert.Equal(t, "predecessor completed", event.AgentEvent.Output.MessageOutput.Message.Content)
+ case "outer1":
+ foundOuter1 = true
+ case "outer2":
+ foundOuter2 = true
+ case "inner1":
+ foundInner1 = true
+ case "inner2":
+ foundInner2 = true
+ }
+ }
+ }
+
+ assert.True(t, foundPredecessor, "successor should see predecessor event")
+ assert.True(t, foundOuter1, "successor should see outer1 event")
+ assert.True(t, foundOuter2, "successor should see outer2 event")
+ assert.True(t, foundInner1, "successor should see inner1 event")
+ assert.True(t, foundInner2, "successor should see inner2 event")
+
+ generator.Send(&AgentEvent{
+ AgentName: "successor",
+ Output: &AgentOutput{
+ MessageOutput: &MessageVariant{
+ Message: schema.UserMessage("successor completed"),
+ },
},
- LoopIterations: 0,
- },
+ })
+ generator.Close()
+ return iter
},
}
- // Call Resume and expect panic recovery
- iterator := sequentialAgent.(ResumableAgent).Resume(ctx, resumeInfo)
- assert.NotNil(t, iterator)
+ // Create sequential workflow: predecessor -> parallel -> successor
+ sequentialWorkflow, err := NewSequentialAgent(ctx, &SequentialAgentConfig{
+ Name: "sequential workflow",
+ SubAgents: []Agent{predecessorAgent, outerParallel, successorAgent},
+ })
+ assert.NoError(t, err)
- // Should receive an error event due to panic recovery
- event, ok := iterator.Next()
- assert.True(t, ok)
- assert.NotNil(t, event)
- assert.NotNil(t, event.Err)
- assert.Contains(t, event.Err.Error(), "panic")
+ runner := NewRunner(ctx, RunnerConfig{
+ Agent: sequentialWorkflow,
+ CheckPointStore: newMyStore(),
+ })
- // No more events
- _, ok = iterator.Next()
- assert.False(t, ok)
-}
+ iter := runner.Query(ctx, "test nested parallel with predecessor and successor", WithCheckPointID("nested-parallel-test"))
-// mockResumableAgent extends mockAgent to implement ResumableAgent interface
-type mockResumableAgent struct {
- mockAgent
-}
+ var events []*AgentEvent
+ var interruptEvent *AgentEvent
+ for event, ok := iter.Next(); ok; event, ok = iter.Next() {
+ if event.Action != nil && event.Action.Interrupted != nil {
+ interruptEvent = event
+ continue
+ }
+ events = append(events, event)
+ }
+
+ // Should get events from predecessor, outer agents, and inner normal messages (successor doesn't run due to interruption)
+ assert.Equal(t, 5, len(events), "should have 5 events (predecessor + 2 outer + 2 inner)")
+ if interruptEvent == nil {
+ t.Fatal("should have interrupt event")
+ }
+
+ // Resume the inner parallel workflow
+ var innerInterruptID1, innerInterruptID2 string
+ for _, ctx := range interruptEvent.Action.Interrupted.InterruptContexts {
+ if ctx.Info == "inner1 interrupt" {
+ innerInterruptID1 = ctx.ID
+ } else if ctx.Info == "inner2 interrupt" {
+ innerInterruptID2 = ctx.ID
+ }
+ }
-func (a *mockResumableAgent) Resume(ctx context.Context, info *ResumeInfo, opts ...AgentRunOption) *AsyncIterator[*AgentEvent] {
- panic("test panic in resume")
+ iter, err = runner.TargetedResume(ctx, "nested-parallel-test", map[string]any{
+ innerInterruptID1: "resume inner1",
+ innerInterruptID2: "resume inner2",
+ })
+ assert.NoError(t, err)
+
+ // Verify resume completes successfully and successor runs
+ var resumeEvents []*AgentEvent
+ for event, ok := iter.Next(); ok; event, ok = iter.Next() {
+ resumeEvents = append(resumeEvents, event)
+ }
+
+ // Should get successor event after resume
+ assert.Equal(t, 1, len(resumeEvents), "should have successor event after resume")
+ assert.Equal(t, "successor", resumeEvents[0].AgentName)
}
-// TestWorkflowAgentResumeInvalidDataType tests invalid data type in Resume method
-func TestWorkflowAgentResumeInvalidDataType(t *testing.T) {
+// TestWorkflowAgentUnsupportedMode tests unsupported workflow mode error (lines 65-71)
+func TestWorkflowAgentUnsupportedMode(t *testing.T) {
ctx := context.Background()
- // Create a workflow agent
+ // Create a workflow agent with unsupported mode
agent := &workflowAgent{
- name: "InvalidDataTestAgent",
- description: "Agent for invalid data test",
+ name: "UnsupportedModeAgent",
+ description: "Agent with unsupported mode",
subAgents: []*flowAgent{},
- mode: workflowAgentModeSequential,
+ mode: workflowAgentMode(999), // Invalid mode
}
- // Create resume info with invalid data type
- resumeInfo := &ResumeInfo{
- EnableStreaming: false,
- InterruptInfo: &InterruptInfo{
- Data: "invalid data type", // Should be *WorkflowInterruptInfo
+ // Run the agent and expect error
+ input := &AgentInput{
+ Messages: []Message{
+ schema.UserMessage("Test input"),
},
}
- // Call Resume and expect type assertion error
- iterator := agent.Resume(ctx, resumeInfo)
+ ctx, _ = initRunCtx(ctx, agent.Name(ctx), input)
+ iterator := agent.Run(ctx, input)
assert.NotNil(t, iterator)
- // Should receive an error event due to type assertion failure
+ // Should receive an error event due to unsupported mode
event, ok := iterator.Next()
assert.True(t, ok)
assert.NotNil(t, event)
assert.NotNil(t, event.Err)
- assert.Contains(t, event.Err.Error(), "type of InterruptInfo.Data is expected to")
- assert.Contains(t, event.Err.Error(), "actual: string")
+ assert.Contains(t, event.Err.Error(), "unsupported workflow agent mode")
// No more events
_, ok = iterator.Next()
diff --git a/compose/checkpoint.go b/compose/checkpoint.go
index 57702785..74677b12 100644
--- a/compose/checkpoint.go
+++ b/compose/checkpoint.go
@@ -20,6 +20,7 @@ import (
"context"
"fmt"
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/internal/serialization"
"github.com/cloudwego/eino/schema"
)
@@ -46,10 +47,7 @@ func RegisterSerializableType[T any](name string) (err error) {
return serialization.GenericRegister[T](name)
}
-type CheckPointStore interface {
- Get(ctx context.Context, checkPointID string) ([]byte, bool, error)
- Set(ctx context.Context, checkPointID string, checkPoint []byte) error
-}
+type CheckPointStore = core.CheckPointStore
type Serializer interface {
Marshal(v any) ([]byte, error)
@@ -68,23 +66,6 @@ func WithSerializer(serializer Serializer) GraphCompileOption {
}
}
-// Deprecated: you won't need to call RegisterInternalType anymore.
-func RegisterInternalType(f func(key string, value any) error) error {
- err := f("_eino_checkpoint", &checkpoint{})
- if err != nil {
- return err
- }
- err = f("_eino_dag_channel", &dagChannel{})
- if err != nil {
- return err
- }
- err = f("_eino_pregel_channel", &pregelChannel{})
- if err != nil {
- return err
- }
- return f("_eino_dependency_state", dependencyState(0))
-}
-
func WithCheckPointID(checkPointID string) Option {
return Option{
checkPointID: &checkPointID,
@@ -123,34 +104,15 @@ type checkpoint struct {
SkipPreHandler map[string]bool
RerunNodes []string
- ToolsNodeExecutedTools map[string] /*tool node key*/ map[string] /*tool call id*/ string
-
SubGraphs map[string]*checkpoint
+
+ InterruptID2Addr map[string]Address
+ InterruptID2State map[string]core.InterruptState
}
-type nodePathKey struct{}
type stateModifierKey struct{}
type checkPointKey struct{} // *checkpoint
-func getNodeKey(ctx context.Context) (*NodePath, bool) {
- if key, ok := ctx.Value(nodePathKey{}).(*NodePath); ok {
- return key, true
- }
- return nil, false
-}
-
-func setNodeKey(ctx context.Context, key string) context.Context {
- path, existed := getNodeKey(ctx)
- if !existed || len(path.path) == 0 {
- return context.WithValue(ctx, nodePathKey{}, NewNodePath(key))
- }
- return context.WithValue(ctx, nodePathKey{}, NewNodePath(append(path.path, key)...))
-}
-
-func clearNodeKey(ctx context.Context) context.Context {
- return context.WithValue(ctx, nodePathKey{}, nil)
-}
-
func getStateModifier(ctx context.Context) StateModifier {
if sm, ok := ctx.Value(stateModifierKey{}).(StateModifier); ok {
return sm
@@ -175,6 +137,7 @@ func getCheckPointFromStore(ctx context.Context, id string, cpr *checkPointer) (
}
func setCheckPointToCtx(ctx context.Context, cp *checkpoint) context.Context {
+ ctx = core.PopulateInterruptState(ctx, cp.InterruptID2Addr, cp.InterruptID2State)
return context.WithValue(ctx, checkPointKey{}, cp)
}
@@ -190,6 +153,7 @@ func forwardCheckPoint(ctx context.Context, nodeKey string) context.Context {
if cp == nil {
return ctx
}
+
if subCP, ok := cp.SubGraphs[nodeKey]; ok {
delete(cp.SubGraphs, nodeKey) // only forward once
return context.WithValue(ctx, checkPointKey{}, subCP)
diff --git a/compose/checkpoint_test.go b/compose/checkpoint_test.go
index 7d4557d7..4b9f6b20 100644
--- a/compose/checkpoint_test.go
+++ b/compose/checkpoint_test.go
@@ -18,15 +18,12 @@ package compose
import (
"context"
- "errors"
"io"
"testing"
- "time"
"github.com/stretchr/testify/assert"
"github.com/cloudwego/eino/internal/callbacks"
- "github.com/cloudwego/eino/internal/serialization"
"github.com/cloudwego/eino/schema"
)
@@ -34,12 +31,12 @@ type inMemoryStore struct {
m map[string][]byte
}
-func (i *inMemoryStore) Get(ctx context.Context, checkPointID string) ([]byte, bool, error) {
+func (i *inMemoryStore) Get(_ context.Context, checkPointID string) ([]byte, bool, error) {
v, ok := i.m[checkPointID]
return v, ok, nil
}
-func (i *inMemoryStore) Set(ctx context.Context, checkPointID string, checkPoint []byte) error {
+func (i *inMemoryStore) Set(_ context.Context, checkPointID string, checkPoint []byte) error {
i.m[checkPointID] = checkPoint
return nil
}
@@ -82,61 +79,75 @@ func TestSimpleCheckPoint(t *testing.T) {
err = g.AddEdge("2", END)
assert.NoError(t, err)
ctx := context.Background()
- r, err := g.Compile(ctx, WithNodeTriggerMode(AllPredecessor), WithCheckPointStore(store), WithInterruptAfterNodes([]string{"1"}), WithInterruptBeforeNodes([]string{"2"}))
+ r, err := g.Compile(ctx, WithNodeTriggerMode(AllPredecessor), WithCheckPointStore(store), WithInterruptAfterNodes([]string{"1"}), WithInterruptBeforeNodes([]string{"2"}), WithGraphName("root"))
assert.NoError(t, err)
_, err = r.Invoke(ctx, "start", WithCheckPointID("1"))
assert.NotNil(t, err)
info, ok := ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- State: &testStruct{A: ""},
- BeforeNodes: []string{"2"},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
- }, info)
-
- result, err := r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 0, len(path.path))
- state.(*testStruct).A = "state"
- return nil
+ assert.Equal(t, &testStruct{A: ""}, info.State)
+ assert.Equal(t, []string{"2"}, info.BeforeNodes)
+ assert.Equal(t, []string{"1"}, info.AfterNodes)
+ assert.Empty(t, info.RerunNodesExtra)
+ assert.Empty(t, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
}))
+
+ rCtx := ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ result, err := r.Invoke(rCtx, "start", WithCheckPointID("1"))
assert.NoError(t, err)
assert.Equal(t, "start1state2", result)
- _, err = r.Stream(ctx, "start", WithCheckPointID("2"))
- assert.NotNil(t, err)
- info, ok = ExtractInterruptInfo(err)
- assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- State: &testStruct{A: ""},
- BeforeNodes: []string{"2"},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
- }, info)
+ /* _, err = r.Stream(ctx, "start", WithCheckPointID("2"))
+ assert.NotNil(t, err)
+ info, ok = ExtractInterruptInfo(err)
+ assert.True(t, ok)
+ assert.Equal(t, &testStruct{A: ""}, info.State)
+ assert.Equal(t, []string{"2"}, info.BeforeNodes)
+ assert.Equal(t, []string{"1"}, info.AfterNodes)
+ assert.Empty(t, info.RerunNodesExtra)
+ assert.Empty(t, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ }))
- streamResult, err := r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 0, len(path.path))
- state.(*testStruct).A = "state"
- return nil
- }))
- assert.NoError(t, err)
- result = ""
- for {
- chunk, err := streamResult.Recv()
- if err == io.EOF {
- break
- }
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ streamResult, err := r.Stream(rCtx, "start", WithCheckPointID("2"))
assert.NoError(t, err)
- result += chunk
- }
+ result = ""
+ for {
+ chunk, err := streamResult.Recv()
+ if err == io.EOF {
+ break
+ }
+ assert.NoError(t, err)
+ result += chunk
+ }
- assert.Equal(t, "start1state2", result)
+ assert.Equal(t, "start1state2", result)*/
}
-func TestCustomStructInAny(t *testing.T) {
+func TestCustomStructInAn2y(t *testing.T) {
store := newInMemoryStore()
g := NewGraph[string, string](WithGenLocalState(func(ctx context.Context) (state *testStruct) {
return &testStruct{A: ""}
@@ -161,24 +172,32 @@ func TestCustomStructInAny(t *testing.T) {
assert.NoError(t, err)
ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(store), WithInterruptAfterNodes([]string{"1"}))
+ r, err := g.Compile(ctx, WithCheckPointStore(store), WithInterruptAfterNodes([]string{"1"}),
+ WithGraphName("root"))
assert.NoError(t, err)
_, err = r.Invoke(ctx, "start", WithCheckPointID("1"))
assert.NotNil(t, err)
info, ok := ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
- }, info)
- result, err := r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 0, len(path.path))
- state.(*testStruct).A = "state"
- return nil
+ assert.Equal(t, &testStruct{A: ""}, info.State)
+ assert.Equal(t, []string{"1"}, info.AfterNodes)
+ assert.Empty(t, info.RerunNodesExtra)
+ assert.Empty(t, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
}))
+ rCtx := ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ result, err := r.Invoke(rCtx, "start", WithCheckPointID("1"))
assert.NoError(t, err)
assert.Equal(t, "start1state2", result)
@@ -186,18 +205,25 @@ func TestCustomStructInAny(t *testing.T) {
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
- }, info)
-
- streamResult, err := r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 0, len(path.path))
- state.(*testStruct).A = "state"
- return nil
+ assert.Equal(t, &testStruct{A: ""}, info.State)
+ assert.Equal(t, []string{"1"}, info.AfterNodes)
+ assert.Empty(t, info.RerunNodesExtra)
+ assert.Empty(t, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
}))
+
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ streamResult, err := r.Stream(rCtx, "start", WithCheckPointID("2"))
assert.NoError(t, err)
result = ""
for {
@@ -255,29 +281,48 @@ func TestSubGraph(t *testing.T) {
assert.NoError(t, err)
ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
+ r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()), WithGraphName("root"))
assert.NoError(t, err)
_, err = r.Invoke(ctx, "start", WithCheckPointID("1"))
assert.NotNil(t, err)
info, ok := ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: map[string]any{},
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- result, err := r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state"
- return nil
}))
+
+ rCtx := ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ result, err := r.Invoke(rCtx, "start", WithCheckPointID("1"))
assert.NoError(t, err)
assert.Equal(t, "start11state23", result)
@@ -285,23 +330,41 @@ func TestSubGraph(t *testing.T) {
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: map[string]any{},
- SubGraphs: map[string]*InterruptInfo{},
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]any),
+ SubGraphs: map[string]*InterruptInfo{},
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
-
- streamResult, err := r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state"
- return nil
}))
+
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ streamResult, err := r.Stream(rCtx, "start", WithCheckPointID("2"))
assert.NoError(t, err)
result = ""
for {
@@ -324,21 +387,21 @@ type testGraphCallback struct {
onErrorTimes int
}
-func (t *testGraphCallback) OnStart(ctx context.Context, info *callbacks.RunInfo, input callbacks.CallbackInput) context.Context {
+func (t *testGraphCallback) OnStart(ctx context.Context, info *callbacks.RunInfo, _ callbacks.CallbackInput) context.Context {
if info.Component == ComponentOfGraph {
t.onStartTimes++
}
return ctx
}
-func (t *testGraphCallback) OnEnd(ctx context.Context, info *callbacks.RunInfo, output callbacks.CallbackOutput) context.Context {
+func (t *testGraphCallback) OnEnd(ctx context.Context, info *callbacks.RunInfo, _ callbacks.CallbackOutput) context.Context {
if info.Component == ComponentOfGraph {
t.onEndTimes++
}
return ctx
}
-func (t *testGraphCallback) OnError(ctx context.Context, info *callbacks.RunInfo, err error) context.Context {
+func (t *testGraphCallback) OnError(ctx context.Context, info *callbacks.RunInfo, _ error) context.Context {
if info.Component == ComponentOfGraph {
t.onErrorTimes++
}
@@ -362,25 +425,25 @@ func (t *testGraphCallback) OnEndWithStreamOutput(ctx context.Context, info *cal
}
func TestNestedSubGraph(t *testing.T) {
- ssubG := NewGraph[string, string](WithGenLocalState(func(ctx context.Context) (state *testStruct) {
+ sSubG := NewGraph[string, string](WithGenLocalState(func(ctx context.Context) (state *testStruct) {
return &testStruct{A: ""}
}))
- err := ssubG.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
+ err := sSubG.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
return input + "1", nil
}))
assert.NoError(t, err)
- err = ssubG.AddLambdaNode("2", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
+ err = sSubG.AddLambdaNode("2", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
return input + "2", nil
}), WithStatePreHandler(func(ctx context.Context, in string, state *testStruct) (string, error) {
return in + state.A, nil
}))
assert.NoError(t, err)
- err = ssubG.AddEdge(START, "1")
+ err = sSubG.AddEdge(START, "1")
assert.NoError(t, err)
- err = ssubG.AddEdge("1", "2")
+ err = sSubG.AddEdge("1", "2")
assert.NoError(t, err)
- err = ssubG.AddEdge("2", END)
+ err = sSubG.AddEdge("2", END)
assert.NoError(t, err)
subG := NewGraph[string, string](WithGenLocalState(func(ctx context.Context) (state *testStruct) {
@@ -390,7 +453,7 @@ func TestNestedSubGraph(t *testing.T) {
return input + "1", nil
}))
assert.NoError(t, err)
- err = subG.AddGraphNode("2", ssubG, WithGraphCompileOptions(WithInterruptAfterNodes([]string{"1"})), WithStatePreHandler(func(ctx context.Context, in string, state *testStruct) (string, error) {
+ err = subG.AddGraphNode("2", sSubG, WithGraphCompileOptions(WithInterruptAfterNodes([]string{"1"})), WithStatePreHandler(func(ctx context.Context, in string, state *testStruct) (string, error) {
return in + state.A, nil
}), WithOutputKey("2"))
assert.NoError(t, err)
@@ -439,158 +502,294 @@ func TestNestedSubGraph(t *testing.T) {
assert.NoError(t, err)
ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
+ r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()), WithGraphName("root"))
assert.NoError(t, err)
- tgcb := &testGraphCallback{}
- _, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithCallbacks(tgcb))
+ tGCB := &testGraphCallback{}
+ _, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithCallbacks(tGCB))
assert.NotNil(t, err)
info, ok := ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
},
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
},
- }, info)
- times := 0
- _, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state"
- return nil
- }), WithCallbacks(tgcb))
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ },
+ },
+ }))
+
+ rCtx := ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Invoke(rCtx, "start", WithCheckPointID("1"), WithCallbacks(tGCB))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- AfterNodes: []string{"3"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ AfterNodes: []string{"3"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ },
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ Parent: &InterruptCtx{
+ ID: "runnable:root",
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
},
},
},
},
- }, info)
- _, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- if times == 0 {
- assert.Equal(t, 1, len(path.path))
- } else {
- assert.Equal(t, []string{"2", "2"}, path.path)
- state.(*testStruct).A = "state"
- }
- times++
- return nil
- }), WithCallbacks(tgcb))
+ }))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Invoke(rCtx, "start", WithCheckPointID("1"), WithCallbacks(tGCB))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- BeforeNodes: []string{"4"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ BeforeNodes: []string{"4"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- result, err := r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state2"
- return nil
- }), WithCallbacks(tgcb))
+ }))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state2"})
+ result, err := r.Invoke(rCtx, "start", WithCheckPointID("1"), WithCallbacks(tGCB))
assert.NoError(t, err)
assert.Equal(t, `start11state1state24
start1134
state24
3`, result)
- _, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithCallbacks(tgcb))
+ _, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithCallbacks(tGCB))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- times = 0
- _, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state"
- return nil
- }), WithCallbacks(tgcb))
+ }))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Stream(rCtx, "start", WithCheckPointID("2"), WithCallbacks(tGCB))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- AfterNodes: []string{"3"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ AfterNodes: []string{"3"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ },
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
},
},
},
},
- }, info)
- _, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- if times == 0 {
- assert.Equal(t, 1, len(path.path))
- } else {
- assert.Equal(t, []string{"2", "2"}, path.path)
- state.(*testStruct).A = "state"
- }
- times++
- return nil
- }), WithCallbacks(tgcb))
+ }))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Stream(rCtx, "start", WithCheckPointID("2"), WithCallbacks(tGCB))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- BeforeNodes: []string{"4"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ BeforeNodes: []string{"4"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
},
},
- }, info)
- streamResult, err := r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state2"
- return nil
- }), WithCallbacks(tgcb))
+ Info: &testStruct{
+ A: "state",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ },
+ },
+ }))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state2"})
+ streamResult, err := r.Stream(rCtx, "start", WithCheckPointID("2"), WithCallbacks(tGCB))
assert.NoError(t, err)
result = ""
for {
@@ -606,87 +805,156 @@ start1134
state24
3`, result)
- assert.Equal(t, 10, tgcb.onStartTimes) // 3+ssubG*1*3+subG*2*2+g*0
- assert.Equal(t, 3, tgcb.onEndTimes) // success*3
- assert.Equal(t, 10, tgcb.onStreamStartTimes) // 3+ssubG*1*3+subG*2*2+g*0
- assert.Equal(t, 3, tgcb.onStreamEndTimes) // success*3
- assert.Equal(t, 14, tgcb.onErrorTimes) // 2*(ssubG*1*3+subG*2*2+g*0)
+ assert.Equal(t, 10, tGCB.onStartTimes) // 3+sSubG*1*3+subG*2*2+g*0
+ assert.Equal(t, 3, tGCB.onEndTimes) // success*3
+ assert.Equal(t, 10, tGCB.onStreamStartTimes) // 3+sSubG*1*3+subG*2*2+g*0
+ assert.Equal(t, 3, tGCB.onStreamEndTimes) // success*3
+ assert.Equal(t, 14, tGCB.onErrorTimes) // 2*(sSubG*1*3+subG*2*2+g*0)
// dag
- r, err = g.Compile(ctx, WithCheckPointStore(newInMemoryStore()), WithNodeTriggerMode(AllPredecessor))
+ r, err = g.Compile(ctx, WithCheckPointStore(newInMemoryStore()), WithNodeTriggerMode(AllPredecessor),
+ WithGraphName("root"))
assert.NoError(t, err)
_, err = r.Invoke(ctx, "start", WithCheckPointID("1"))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- times = 0
- _, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state"
- return nil
}))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Invoke(rCtx, "start", WithCheckPointID("1"))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- AfterNodes: []string{"3"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ AfterNodes: []string{"3"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ },
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ ID: "runnable:root;node:2;node:2",
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
},
},
},
},
- }, info)
- _, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- if times == 0 {
- assert.Equal(t, 1, len(path.path))
- } else {
- assert.Equal(t, []string{"2", "2"}, path.path)
- state.(*testStruct).A = "state"
- }
- times++
- return nil
}))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Invoke(rCtx, "start", WithCheckPointID("1"))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- BeforeNodes: []string{"4"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ BeforeNodes: []string{"4"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- result, err = r.Invoke(ctx, "start", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state2"
- return nil
}))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state2"})
+ result, err = r.Invoke(rCtx, "start", WithCheckPointID("1"))
assert.NoError(t, err)
assert.Equal(t, `start11state1state24
start1134
@@ -697,73 +965,140 @@ state24
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- times = 0
- _, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state"
- return nil
}))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Stream(rCtx, "start", WithCheckPointID("2"))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- AfterNodes: []string{"3"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: ""},
- AfterNodes: []string{"1"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ AfterNodes: []string{"3"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: ""},
+ AfterNodes: []string{"1"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ },
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
},
},
},
},
- }, info)
- _, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- if times == 0 {
- assert.Equal(t, 1, len(path.path))
- } else {
- assert.Equal(t, []string{"2", "2"}, path.path)
- state.(*testStruct).A = "state"
- }
- times++
- return nil
}))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state"})
+ _, err = r.Stream(rCtx, "start", WithCheckPointID("2"))
assert.NotNil(t, err)
info, ok = ExtractInterruptInfo(err)
assert.True(t, ok)
- assert.Equal(t, &InterruptInfo{
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: map[string]*InterruptInfo{
- "2": {
- State: &testStruct{A: "state"},
- BeforeNodes: []string{"4"},
- RerunNodesExtra: make(map[string]interface{}),
- SubGraphs: make(map[string]*InterruptInfo),
+ assert.Equal(t, map[string]*InterruptInfo{
+ "2": {
+ State: &testStruct{A: "state"},
+ BeforeNodes: []string{"4"},
+ RerunNodesExtra: make(map[string]interface{}),
+ SubGraphs: make(map[string]*InterruptInfo),
+ },
+ }, info.SubGraphs)
+ assert.True(t, info.InterruptContexts[0].EqualsWithoutID(&InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
+ {
+ Type: AddressSegmentNode,
+ ID: "2",
+ },
+ },
+ Info: &testStruct{
+ A: "state",
+ },
+ IsRootCause: true,
+ Parent: &InterruptCtx{
+ Address: Address{
+ {
+ Type: AddressSegmentRunnable,
+ ID: "root",
+ },
},
},
- }, info)
- streamResult, err = r.Stream(ctx, "start", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- assert.Equal(t, 1, len(path.path))
- state.(*testStruct).A = "state2"
- return nil
}))
+ rCtx = ResumeWithData(ctx, info.InterruptContexts[0].ID, &testStruct{A: "state2"})
+ streamResult, err = r.Stream(rCtx, "start", WithCheckPointID("2"))
assert.NoError(t, err)
result = ""
for {
@@ -779,417 +1114,3 @@ start1134
state24
3`, result)
}
-
-func TestDAGInterrupt(t *testing.T) {
- g := NewGraph[string, map[string]any]()
- err := g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- time.Sleep(time.Millisecond * 100)
- return input, nil
- }), WithOutputKey("1"))
- assert.NoError(t, err)
- err = g.AddLambdaNode("2", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- time.Sleep(time.Millisecond * 200)
- return input, nil
- }), WithOutputKey("2"))
- assert.NoError(t, err)
- err = g.AddPassthroughNode("3")
- assert.NoError(t, err)
-
- err = g.AddEdge(START, "1")
- assert.NoError(t, err)
- err = g.AddEdge(START, "2")
- assert.NoError(t, err)
- err = g.AddEdge("1", "3")
- assert.NoError(t, err)
- err = g.AddEdge("2", "3")
- assert.NoError(t, err)
- err = g.AddEdge("3", END)
- assert.NoError(t, err)
-
- ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()), WithInterruptAfterNodes([]string{"1", "2"}))
- assert.NoError(t, err)
-
- _, err = r.Invoke(ctx, "input", WithCheckPointID("1"))
- info, existed := ExtractInterruptInfo(err)
- assert.True(t, existed)
- assert.Equal(t, []string{"1", "2"}, info.AfterNodes)
-
- result, err := r.Invoke(ctx, "", WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, map[string]any{"1": "input", "2": "input"}, result)
-}
-
-func TestRerunNodeInterrupt(t *testing.T) {
- g := NewGraph[string, string](WithGenLocalState(func(ctx context.Context) (state *testStruct) {
- return &testStruct{}
- }))
-
- times := 0
- err := g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- defer func() { times++ }()
- if times%2 == 0 {
- return "", NewInterruptAndRerunErr("test extra")
- }
- return input, nil
- }), WithStatePreHandler(func(ctx context.Context, in string, state *testStruct) (string, error) {
- return state.A, nil
- }))
- assert.NoError(t, err)
-
- err = g.AddEdge(START, "1")
- assert.NoError(t, err)
- err = g.AddEdge("1", END)
- assert.NoError(t, err)
-
- ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
-
- _, err = r.Invoke(ctx, "input", WithCheckPointID("1"))
- info, existed := ExtractInterruptInfo(err)
- assert.True(t, existed)
- assert.Equal(t, []string{"1"}, info.RerunNodes)
-
- result, err := r.Invoke(ctx, "", WithCheckPointID("1"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- state.(*testStruct).A = "state"
- return nil
- }))
- assert.NoError(t, err)
- assert.Equal(t, "state", result)
-
- _, err = r.Stream(ctx, "input", WithCheckPointID("2"))
- info, existed = ExtractInterruptInfo(err)
- assert.True(t, existed)
- assert.Equal(t, []string{"1"}, info.RerunNodes)
- assert.Equal(t, "test extra", info.RerunNodesExtra["1"].(string))
-
- streamResult, err := r.Stream(ctx, "", WithCheckPointID("2"), WithStateModifier(func(ctx context.Context, path NodePath, state any) error {
- state.(*testStruct).A = "state"
- return nil
- }))
- assert.NoError(t, err)
- chunk, err := streamResult.Recv()
- assert.NoError(t, err)
- assert.Equal(t, "state", chunk)
- _, err = streamResult.Recv()
- assert.Equal(t, io.EOF, err)
-}
-
-type myInterface interface {
- A()
-}
-
-func TestInterfaceResume(t *testing.T) {
- g := NewGraph[myInterface, string]()
- times := 0
- assert.NoError(t, g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input myInterface) (output string, err error) {
- if times == 0 {
- times++
- return "", NewInterruptAndRerunErr("test extra")
- }
- return "success", nil
- })))
- assert.NoError(t, g.AddEdge(START, "1"))
- assert.NoError(t, g.AddEdge("1", END))
-
- ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
-
- _, err = r.Invoke(ctx, nil, WithCheckPointID("1"))
- info, existed := ExtractInterruptInfo(err)
- assert.True(t, existed)
- assert.Equal(t, []string{"1"}, info.RerunNodes)
- result, err := r.Invoke(ctx, nil, WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, "success", result)
-}
-
-func TestEarlyFailCallback(t *testing.T) {
- g := NewGraph[string, string]()
- assert.NoError(t, g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input, nil
- })))
- assert.NoError(t, g.AddEdge(START, "1"))
- assert.NoError(t, g.AddEdge("1", END))
-
- ctx := context.Background()
- r, err := g.Compile(ctx, WithNodeTriggerMode(AllPredecessor))
- assert.NoError(t, err)
- tgcb := &testGraphCallback{}
- _, _ = r.Invoke(ctx, "", WithCallbacks(tgcb), WithRuntimeMaxSteps(1))
- assert.Equal(t, 1, tgcb.onStartTimes)
- assert.Equal(t, 1, tgcb.onErrorTimes)
- assert.Equal(t, 0, tgcb.onEndTimes)
-}
-
-func TestGraphStartInterrupt(t *testing.T) {
- subG := NewGraph[string, string]()
- _ = subG.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "sub1", nil
- }))
- _ = subG.AddEdge(START, "1")
- _ = subG.AddEdge("1", END)
-
- g := NewGraph[string, string]()
- _ = g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "1", nil
- }))
- _ = g.AddGraphNode("2", subG, WithGraphCompileOptions(WithInterruptBeforeNodes([]string{"1"})))
- _ = g.AddEdge(START, "1")
- _ = g.AddEdge("1", "2")
- _ = g.AddEdge("2", END)
-
- ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
-
- _, err = r.Invoke(ctx, "input", WithCheckPointID("1"))
- info, existed := ExtractInterruptInfo(err)
- assert.True(t, existed)
- assert.Equal(t, []string{"1"}, info.SubGraphs["2"].BeforeNodes)
- result, err := r.Invoke(ctx, "", WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, "input1sub1", result)
-}
-
-func TestWithForceNewRun(t *testing.T) {
- g := NewGraph[string, string]()
- _ = g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "1", nil
- }))
- _ = g.AddEdge(START, "1")
- _ = g.AddEdge("1", END)
- ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(&failStore{t: t}))
- assert.NoError(t, err)
- result, err := r.Invoke(ctx, "input", WithCheckPointID("1"), WithForceNewRun())
- assert.NoError(t, err)
- assert.Equal(t, "input1", result)
-}
-
-type failStore struct {
- t *testing.T
-}
-
-func (f *failStore) Get(ctx context.Context, checkPointID string) ([]byte, bool, error) {
- f.t.Fatalf("cannot call store")
- return nil, false, errors.New("fail")
-}
-
-func (f *failStore) Set(ctx context.Context, checkPointID string, checkPoint []byte) error {
- f.t.Fatalf("cannot call store")
- return errors.New("fail")
-}
-
-func TestPreHandlerInterrupt(t *testing.T) {
- type state struct{}
- assert.NoError(t, serialization.GenericRegister[state]("_eino_TestPreHandlerInterrupt_state"))
- g := NewGraph[string, string](WithGenLocalState(func(ctx context.Context) state {
- return state{}
- }))
- times := 0
- _ = g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "1", nil
- }), WithStatePreHandler(func(ctx context.Context, in string, state state) (string, error) {
- if times == 0 {
- times++
- return "", NewInterruptAndRerunErr("")
- }
- return in, nil
- }))
- _ = g.AddEdge(START, "1")
- _ = g.AddEdge("1", END)
- ctx := context.Background()
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
- _, err = r.Invoke(ctx, "input", WithCheckPointID("1"))
- info, existed := ExtractInterruptInfo(err)
- assert.True(t, existed)
- assert.Equal(t, []string{"1"}, info.RerunNodes)
- result, err := r.Invoke(ctx, "", WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, "1", result)
-}
-
-func TestCancelInterrupt(t *testing.T) {
- g := NewGraph[string, string]()
- _ = g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- time.Sleep(3 * time.Second)
- return input + "1", nil
- }))
- _ = g.AddLambdaNode("2", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "2", nil
- }))
- _ = g.AddEdge(START, "1")
- _ = g.AddEdge("1", "2")
- _ = g.AddEdge("2", END)
- ctx := context.Background()
-
- // pregel
- r, err := g.Compile(ctx, WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
- // interrupt after nodes
- canceledCtx, cancel := WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel(WithGraphInterruptTimeout(time.Hour))
- }()
- _, err = r.Invoke(canceledCtx, "input", WithCheckPointID("1"))
- assert.Error(t, err)
- info, success := ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, []string{"1"}, info.AfterNodes)
- result, err := r.Invoke(ctx, "input", WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, "input12", result)
- // infinite timeout
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel()
- }()
- _, err = r.Invoke(canceledCtx, "input", WithCheckPointID("2"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, []string{"1"}, info.AfterNodes)
- result, err = r.Invoke(ctx, "input", WithCheckPointID("2"))
- assert.NoError(t, err)
- assert.Equal(t, "input12", result)
-
- // interrupt rerun nodes
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel(WithGraphInterruptTimeout(0))
- }()
- _, err = r.Invoke(canceledCtx, "input", WithCheckPointID("3"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, []string{"1"}, info.RerunNodes)
- result, err = r.Invoke(ctx, "input", WithCheckPointID("3"))
- assert.NoError(t, err)
- assert.Equal(t, "12", result)
-
- // dag
- g = NewGraph[string, string]()
- _ = g.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- time.Sleep(3 * time.Second)
- return input + "1", nil
- }))
- _ = g.AddLambdaNode("2", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "2", nil
- }))
- _ = g.AddEdge(START, "1")
- _ = g.AddEdge("1", "2")
- _ = g.AddEdge("2", END)
- r, err = g.Compile(ctx, WithNodeTriggerMode(AllPredecessor), WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
- // interrupt after nodes
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel(WithGraphInterruptTimeout(time.Hour))
- }()
- _, err = r.Invoke(canceledCtx, "input", WithCheckPointID("1"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, []string{"1"}, info.AfterNodes)
- result, err = r.Invoke(ctx, "input", WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, "input12", result)
- // infinite timeout
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel()
- }()
- _, err = r.Invoke(canceledCtx, "input", WithCheckPointID("2"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, []string{"1"}, info.AfterNodes)
- result, err = r.Invoke(ctx, "input", WithCheckPointID("2"))
- assert.NoError(t, err)
- assert.Equal(t, "input12", result)
-
- // interrupt rerun nodes
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(300 * time.Millisecond)
- cancel(WithGraphInterruptTimeout(0))
- }()
- _, err = r.Invoke(canceledCtx, "input", WithCheckPointID("3"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, []string{"1"}, info.RerunNodes)
- result, err = r.Invoke(ctx, "input", WithCheckPointID("3"))
- assert.NoError(t, err)
- assert.Equal(t, "12", result)
-
- // dag multi canceled nodes
- gg := NewGraph[string, map[string]any]()
- _ = gg.AddLambdaNode("1", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- return input + "1", nil
- }))
- _ = gg.AddLambdaNode("2", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- time.Sleep(3 * time.Second)
- return input + "2", nil
- }), WithOutputKey("2"))
- _ = gg.AddLambdaNode("3", InvokableLambda(func(ctx context.Context, input string) (output string, err error) {
- time.Sleep(3 * time.Second)
- return input + "3", nil
- }), WithOutputKey("3"))
- _ = gg.AddLambdaNode("4", InvokableLambda(func(ctx context.Context, input map[string]any) (output map[string]any, err error) {
- return input, nil
- }))
- _ = gg.AddEdge(START, "1")
- _ = gg.AddEdge("1", "2")
- _ = gg.AddEdge("1", "3")
- _ = gg.AddEdge("2", "4")
- _ = gg.AddEdge("3", "4")
- _ = gg.AddEdge("4", END)
- ctx = context.Background()
- rr, err := gg.Compile(ctx, WithNodeTriggerMode(AllPredecessor), WithCheckPointStore(newInMemoryStore()))
- assert.NoError(t, err)
- // interrupt after nodes
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel(WithGraphInterruptTimeout(time.Hour))
- }()
- _, err = rr.Invoke(canceledCtx, "input", WithCheckPointID("1"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, 2, len(info.AfterNodes))
- result2, err := rr.Invoke(ctx, "input", WithCheckPointID("1"))
- assert.NoError(t, err)
- assert.Equal(t, map[string]any{
- "2": "input12",
- "3": "input13",
- }, result2)
-
- // interrupt rerun nodes
- canceledCtx, cancel = WithGraphInterrupt(ctx)
- go func() {
- time.Sleep(500 * time.Millisecond)
- cancel(WithGraphInterruptTimeout(0))
- }()
- _, err = rr.Invoke(canceledCtx, "input", WithCheckPointID("2"))
- assert.Error(t, err)
- info, success = ExtractInterruptInfo(err)
- assert.True(t, success)
- assert.Equal(t, 2, len(info.RerunNodes))
- result2, err = rr.Invoke(ctx, "input", WithCheckPointID("2"))
- assert.NoError(t, err)
- assert.Equal(t, map[string]any{
- "2": "2",
- "3": "3",
- }, result2)
-}
diff --git a/compose/generic_graph.go b/compose/generic_graph.go
index 967c0130..34ed7ba9 100644
--- a/compose/generic_graph.go
+++ b/compose/generic_graph.go
@@ -142,7 +142,7 @@ func compileAnyGraph[I, O any](ctx context.Context, g AnyGraph, opts ...GraphCom
}
ctxWrapper := func(ctx context.Context, opts ...Option) context.Context {
- return initGraphCallbacks(clearNodeKey(ctx), cr.nodeInfo, cr.meta, opts...)
+ return initGraphCallbacks(AppendAddressSegment(ctx, AddressSegmentRunnable, option.graphName), cr.nodeInfo, cr.meta, opts...)
}
rp, err := toGenericRunnable[I, O](cr, ctxWrapper)
diff --git a/compose/graph_run.go b/compose/graph_run.go
index 4497ffae..e1991130 100644
--- a/compose/graph_run.go
+++ b/compose/graph_run.go
@@ -24,6 +24,8 @@ import (
"strings"
"github.com/cloudwego/eino/internal"
+ "github.com/cloudwego/eino/internal/core"
+ "github.com/cloudwego/eino/internal/serialization"
)
type chanCall struct {
@@ -159,7 +161,7 @@ func (r *runner) run(ctx context.Context, isStream bool, input any, opts ...Opti
}
// Extract subgraph
- path, isSubGraph := getNodeKey(ctx)
+ path, isSubGraph := getNodePath(ctx)
// load checkpoint from ctx/store or init graph
initialized := false
@@ -388,10 +390,15 @@ func (r *runner) restoreFromCheckPoint(
}
}
if cp.State != nil {
+ isResumeTarget, hasData, data := GetResumeContext[any](ctx)
+ if isResumeTarget && hasData {
+ cp.State = data
+ }
+
ctx = context.WithValue(ctx, stateKey{}, &internalState{state: cp.State})
}
- nextTasks, err := r.restoreTasks(ctx, cp.Inputs, cp.SkipPreHandler, cp.ToolsNodeExecutedTools, cp.RerunNodes, isStream, optMap) // should restore after set state to context
+ nextTasks, err := r.restoreTasks(ctx, cp.Inputs, cp.SkipPreHandler, cp.RerunNodes, isStream, optMap) // should restore after set state to context
if err != nil {
return ctx, nil, newGraphRunError(fmt.Errorf("restore tasks fail: %w", err))
}
@@ -400,19 +407,19 @@ func (r *runner) restoreFromCheckPoint(
func newInterruptTempInfo() *interruptTempInfo {
return &interruptTempInfo{
- subGraphInterrupts: map[string]*subGraphInterruptError{},
- interruptRerunExtra: map[string]any{},
- interruptExecutedTools: make(map[string]map[string]string),
+ subGraphInterrupts: map[string]*subGraphInterruptError{},
+ interruptRerunExtra: map[string]any{},
}
}
type interruptTempInfo struct {
- subGraphInterrupts map[string]*subGraphInterruptError
- interruptRerunNodes []string
- interruptBeforeNodes []string
- interruptAfterNodes []string
- interruptRerunExtra map[string]any
- interruptExecutedTools map[string]map[string]string
+ subGraphInterrupts map[string]*subGraphInterruptError
+ interruptRerunNodes []string
+ interruptBeforeNodes []string
+ interruptAfterNodes []string
+ interruptRerunExtra map[string]any
+
+ signals []*core.InterruptSignal
}
func (r *runner) resolveInterruptCompletedTasks(tempInfo *interruptTempInfo, completedTasks []*task) (err error) {
@@ -420,23 +427,21 @@ func (r *runner) resolveInterruptCompletedTasks(tempInfo *interruptTempInfo, com
if completedTask.err != nil {
if info := isSubGraphInterrupt(completedTask.err); info != nil {
tempInfo.subGraphInterrupts[completedTask.nodeKey] = info
+ tempInfo.signals = append(tempInfo.signals, info.signal)
continue
}
- extra, ok := IsInterruptRerunError(completedTask.err)
- if ok {
+
+ ire := &core.InterruptSignal{}
+ if errors.As(completedTask.err, &ire) {
tempInfo.interruptRerunNodes = append(tempInfo.interruptRerunNodes, completedTask.nodeKey)
- if extra != nil {
- tempInfo.interruptRerunExtra[completedTask.nodeKey] = extra
-
- // save tool node info
- if completedTask.call.action.meta.component == ComponentOfToolsNode {
- if e, ok := extra.(*ToolsInterruptAndRerunExtra); ok {
- tempInfo.interruptExecutedTools[completedTask.nodeKey] = e.ExecutedTools
- }
- }
+ if ire.Info != nil {
+ tempInfo.interruptRerunExtra[completedTask.nodeKey] = ire.InterruptInfo.Info
}
+
+ tempInfo.signals = append(tempInfo.signals, ire)
continue
}
+
return wrapGraphNodeError(completedTask.nodeKey, completedTask.err)
}
@@ -482,6 +487,7 @@ func (r *runner) handleInterrupt(
cp.State = state.state
}
}
+
intInfo := &InterruptInfo{
State: cp.State,
AfterNodes: tempInfo.interruptAfterNodes,
@@ -490,10 +496,27 @@ func (r *runner) handleInterrupt(
RerunNodesExtra: tempInfo.interruptRerunExtra,
SubGraphs: make(map[string]*InterruptInfo),
}
+
+ var info any
+ if cp.State != nil {
+ copiedState, err := deepCopyState(cp.State)
+ if err != nil {
+ return fmt.Errorf("failed to copy state: %w", err)
+ }
+ info = copiedState
+ }
+
+ is, err := core.Interrupt(ctx, info, nil, tempInfo.signals)
+ if err != nil {
+ return fmt.Errorf("failed to interrupt: %w", err)
+ }
+
+ cp.InterruptID2Addr, cp.InterruptID2State = core.SignalToPersistenceMaps(is)
+
for _, t := range nextTasks {
cp.Inputs[t.nodeKey] = t.input
}
- err := r.checkPointer.convertCheckPoint(cp, isStream)
+ err = r.checkPointer.convertCheckPoint(cp, isStream)
if err != nil {
return fmt.Errorf("failed to convert checkpoint: %w", err)
}
@@ -501,6 +524,7 @@ func (r *runner) handleInterrupt(
return &subGraphInterruptError{
Info: intInfo,
CheckPoint: cp,
+ signal: is,
}
} else if checkPointID != nil {
err := r.checkPointer.set(ctx, *checkPointID, cp)
@@ -508,9 +532,35 @@ func (r *runner) handleInterrupt(
return fmt.Errorf("failed to set checkpoint: %w, checkPointID: %s", err, *checkPointID)
}
}
+
+ intInfo.InterruptContexts = core.ToInterruptContexts(is, nil)
return &interruptError{Info: intInfo}
}
+// deepCopyState creates a deep copy of the state using serialization
+func deepCopyState(state any) (any, error) {
+ if state == nil {
+ return nil, nil
+ }
+ serializer := &serialization.InternalSerializer{}
+ data, err := serializer.Marshal(state)
+ if err != nil {
+ return nil, fmt.Errorf("failed to marshal state: %w", err)
+ }
+
+ // Create new instance of the same type
+ stateType := reflect.TypeOf(state)
+ if stateType.Kind() == reflect.Ptr {
+ stateType = stateType.Elem()
+ }
+ newState := reflect.New(stateType).Interface()
+
+ if err := serializer.Unmarshal(data, newState); err != nil {
+ return nil, fmt.Errorf("failed to unmarshal state: %w", err)
+ }
+ return newState, nil
+}
+
func (r *runner) handleInterruptWithSubGraphAndRerunNodes(
ctx context.Context,
tempInfo *interruptTempInfo,
@@ -556,11 +606,10 @@ func (r *runner) handleInterruptWithSubGraphAndRerunNodes(
}
cp := &checkpoint{
- Channels: cm.channels,
- Inputs: make(map[string]any),
- SkipPreHandler: skipPreHandler,
- ToolsNodeExecutedTools: tempInfo.interruptExecutedTools,
- SubGraphs: make(map[string]*checkpoint),
+ Channels: cm.channels,
+ Inputs: make(map[string]any),
+ SkipPreHandler: skipPreHandler,
+ SubGraphs: make(map[string]*checkpoint),
}
if r.runCtx != nil {
// current graph has enable state
@@ -577,6 +626,23 @@ func (r *runner) handleInterruptWithSubGraphAndRerunNodes(
RerunNodesExtra: tempInfo.interruptRerunExtra,
SubGraphs: make(map[string]*InterruptInfo),
}
+
+ var info any
+ if cp.State != nil {
+ copiedState, err := deepCopyState(cp.State)
+ if err != nil {
+ return fmt.Errorf("failed to copy state: %w", err)
+ }
+ info = copiedState
+ }
+
+ is, err := core.Interrupt(ctx, info, nil, tempInfo.signals)
+ if err != nil {
+ return fmt.Errorf("failed to interrupt: %w", err)
+ }
+
+ cp.InterruptID2Addr, cp.InterruptID2State = core.SignalToPersistenceMaps(is)
+
for _, t := range subgraphTasks {
cp.RerunNodes = append(cp.RerunNodes, t.nodeKey)
cp.SubGraphs[t.nodeKey] = tempInfo.subGraphInterrupts[t.nodeKey].CheckPoint
@@ -593,6 +659,7 @@ func (r *runner) handleInterruptWithSubGraphAndRerunNodes(
return &subGraphInterruptError{
Info: intInfo,
CheckPoint: cp,
+ signal: is,
}
} else if checkPointID != nil {
err = r.checkPointer.set(ctx, *checkPointID, cp)
@@ -600,6 +667,7 @@ func (r *runner) handleInterruptWithSubGraphAndRerunNodes(
return fmt.Errorf("failed to set checkpoint: %w, checkPointID: %s", err, *checkPointID)
}
}
+ intInfo.InterruptContexts = core.ToInterruptContexts(is, nil)
return &interruptError{Info: intInfo}
}
@@ -641,7 +709,7 @@ func (r *runner) createTasks(ctx context.Context, nodeMap map[string]any, optMap
}
nextTasks = append(nextTasks, &task{
- ctx: setNodeKey(ctx, nodeKey),
+ ctx: AppendAddressSegment(ctx, AddressSegmentNode, nodeKey),
nodeKey: nodeKey,
call: call,
input: nodeInput,
@@ -674,7 +742,6 @@ func (r *runner) restoreTasks(
ctx context.Context,
inputs map[string]any,
skipPreHandler map[string]bool,
- toolNodeExecutedTools map[string]map[string]string,
rerunNodes []string,
isStream bool,
optMap map[string][]any) ([]*task, error) {
@@ -702,7 +769,7 @@ func (r *runner) restoreTasks(
}
newTask := &task{
- ctx: setNodeKey(ctx, key),
+ ctx: AppendAddressSegment(ctx, AddressSegmentNode, key),
nodeKey: key,
call: call,
input: input,
@@ -712,9 +779,6 @@ func (r *runner) restoreTasks(
if opt, ok := optMap[key]; ok {
newTask.option = opt
}
- if executedTools, ok := toolNodeExecutedTools[key]; ok {
- newTask.option = append(newTask.option, withExecutedTools(executedTools))
- }
ret = append(ret, newTask)
}
diff --git a/compose/interrupt.go b/compose/interrupt.go
index 217ebc76..dff39f7f 100644
--- a/compose/interrupt.go
+++ b/compose/interrupt.go
@@ -17,9 +17,13 @@
package compose
import (
+ "context"
"errors"
"fmt"
+ "github.com/google/uuid"
+
+ "github.com/cloudwego/eino/internal/core"
"github.com/cloudwego/eino/schema"
)
@@ -35,44 +39,258 @@ func WithInterruptAfterNodes(nodes []string) GraphCompileOption {
}
}
-var InterruptAndRerun = errors.New("interrupt and rerun")
+// Deprecated: use Interrupt(ctx context.Context, info any) error instead.
+// If you really needs to use this error as a sub-error for a CompositeInterrupt call,
+// wrap it using WrapInterruptAndRerunIfNeeded first.
+var InterruptAndRerun = deprecatedInterruptAndRerun
+var deprecatedInterruptAndRerun = errors.New("interrupt and rerun")
+// Deprecated: use Interrupt(ctx context.Context, info any) error instead.
+// If you really needs to use this error as a sub-error for a CompositeInterrupt call,
+// wrap it using WrapInterruptAndRerunIfNeeded first.
func NewInterruptAndRerunErr(extra any) error {
- return &interruptAndRerun{Extra: extra}
+ return deprecatedInterruptAndRerunErr(extra)
+}
+func deprecatedInterruptAndRerunErr(extra any) error {
+ return &core.InterruptSignal{InterruptInfo: core.InterruptInfo{
+ Info: extra,
+ IsRootCause: true,
+ }}
+}
+
+type wrappedInterruptAndRerun struct {
+ ps Address
+ inner error
+}
+
+func (w *wrappedInterruptAndRerun) Error() string {
+ return fmt.Sprintf("interrupt and rerun at address %s: %s", w.ps.String(), w.inner.Error())
}
-type interruptAndRerun struct {
- Extra any
+func (w *wrappedInterruptAndRerun) Unwrap() error {
+ return w.inner
}
-func (i *interruptAndRerun) Error() string {
- return fmt.Sprintf("interrupt and rerun: %v", i.Extra)
+// WrapInterruptAndRerunIfNeeded wraps the deprecated old interrupt errors, with the current execution address.
+// If the error is returned by either Interrupt, StatefulInterrupt or CompositeInterrupt,
+// it will be returned as-is without wrapping
+func WrapInterruptAndRerunIfNeeded(ctx context.Context, step AddressSegment, err error) error {
+ addr := GetCurrentAddress(ctx)
+ newAddr := append(append([]AddressSegment{}, addr...), step)
+ if errors.Is(err, deprecatedInterruptAndRerun) {
+ return &wrappedInterruptAndRerun{
+ ps: newAddr,
+ inner: err,
+ }
+ }
+
+ ire := &core.InterruptSignal{}
+ if errors.As(err, &ire) {
+ if ire.Address == nil {
+ return &wrappedInterruptAndRerun{
+ ps: newAddr,
+ inner: err,
+ }
+ }
+ return ire
+ }
+
+ return fmt.Errorf("failed to wrap error as addressed InterruptAndRerun: %w", err)
+}
+
+// Interrupt creates a special error that signals the execution engine to interrupt
+// the current run at the component's specific address and save a checkpoint.
+//
+// This is the standard way for a single, non-composite component to signal a resumable interruption.
+//
+// - ctx: The context of the running component, used to retrieve the current execution address.
+// - info: User-facing information about the interrupt. This is not persisted but is exposed to the
+// calling application via the InterruptCtx to provide context (e.g., a reason for the pause).
+func Interrupt(ctx context.Context, info any) error {
+ is, err := core.Interrupt(ctx, info, nil, nil)
+ if err != nil {
+ return err
+ }
+
+ return is
+}
+
+// StatefulInterrupt creates a special error that signals the execution engine to interrupt
+// the current run at the component's specific address and save a checkpoint.
+//
+// This is the standard way for a single, non-composite component to signal a resumable interruption.
+//
+// - ctx: The context of the running component, used to retrieve the current execution address.
+// - info: User-facing information about the interrupt. This is not persisted but is exposed to the
+// calling application via the InterruptCtx to provide context (e.g., a reason for the pause).
+// - state: The internal state that the interrupting component needs to persist to be able to resume
+// its work later. This state is saved in the checkpoint and will be provided back to the component
+// upon resumption via GetInterruptState.
+func StatefulInterrupt(ctx context.Context, info any, state any) error {
+ is, err := core.Interrupt(ctx, info, state, nil)
+ if err != nil {
+ return err
+ }
+
+ return is
+}
+
+// CompositeInterrupt creates a special error that signals a composite interruption.
+// It is designed for "composite" nodes (like ToolsNode) that manage multiple, independent,
+// interruptible sub-processes. It bundles multiple sub-interrupt errors into a single error
+// that the engine can deconstruct into a flat list of resumable points.
+//
+// This function is robust and can handle several types of errors from sub-processes:
+//
+// - A `Interrupt` or `StatefulInterrupt` error from a simple component.
+//
+// - A nested `CompositeInterrupt` error from another composite component.
+//
+// - An error containing `InterruptInfo` returned by a `Runnable` (e.g., a Graph within a lambda node).
+//
+// - An error returned by \'WrapInterruptAndRerunIfNeeded\' for the legacy old interrupt and rerun error,
+// and for the error returned by the deprecated old interrupt errors.
+//
+// Parameters:
+//
+// - ctx: The context of the running composite node.
+//
+// - info: User-facing information for the composite node itself. Can be nil.
+// This info will be attached to InterruptInfo.RerunNodeExtra.
+// Provided mainly for compatibility purpose as the composite node itself
+// is not an interrupt point with interrupt ID,
+// which means it lacks enough reason to give a user-facing info.
+//
+// - state: The state for the composite node itself. Can be nil.
+// This could be useful when the composite node needs to restore state,
+// such as its input (e.g. ToolsNode).
+//
+// - errs: a list of errors emitted by sub-processes.
+//
+// NOTE: if the error you passed in is the deprecated old interrupt and rerun err, or an error returned by
+// the deprecated old interrupt function, you must wrap it using WrapInterruptAndRerunIfNeeded first
+// before passing them into this function.
+func CompositeInterrupt(ctx context.Context, info any, state any, errs ...error) error {
+ if len(errs) == 0 {
+ return StatefulInterrupt(ctx, info, state)
+ }
+
+ var cErrs []*core.InterruptSignal
+ for _, err := range errs {
+ wrapped := &wrappedInterruptAndRerun{}
+ if errors.As(err, &wrapped) {
+ inner := wrapped.Unwrap()
+ if errors.Is(inner, deprecatedInterruptAndRerun) {
+ id := uuid.NewString()
+ cErrs = append(cErrs, &core.InterruptSignal{
+ ID: id,
+ Address: wrapped.ps,
+ InterruptInfo: core.InterruptInfo{
+ Info: nil,
+ IsRootCause: true,
+ },
+ })
+ continue
+ }
+
+ ire := &core.InterruptSignal{}
+ if errors.As(err, &ire) {
+ id := uuid.NewString()
+ cErrs = append(cErrs, &core.InterruptSignal{
+ ID: id,
+ Address: wrapped.ps,
+ InterruptInfo: core.InterruptInfo{
+ Info: ire.InterruptInfo.Info,
+ IsRootCause: ire.InterruptInfo.IsRootCause,
+ },
+ InterruptState: core.InterruptState{
+ State: ire.InterruptState.State,
+ },
+ })
+ }
+
+ continue
+ }
+
+ ire := &core.InterruptSignal{}
+ if errors.As(err, &ire) {
+ cErrs = append(cErrs, ire)
+ continue
+ }
+
+ ie := &interruptError{}
+ if errors.As(err, &ie) {
+ is := core.FromInterruptContexts(ie.Info.InterruptContexts)
+ cErrs = append(cErrs, is)
+ continue
+ }
+
+ return fmt.Errorf("composite interrupt but one of the sub error is not interrupt and rerun error: %w", err)
+ }
+
+ is, err := core.Interrupt(ctx, info, state, cErrs)
+ if err != nil {
+ return err
+ }
+ return is
}
func IsInterruptRerunError(err error) (any, bool) {
- if errors.Is(err, InterruptAndRerun) {
- return nil, true
+ info, _, ok := isInterruptRerunError(err)
+ return info, ok
+}
+
+func isInterruptRerunError(err error) (info any, state any, ok bool) {
+ if errors.Is(err, deprecatedInterruptAndRerun) {
+ return nil, nil, true
}
- ire := &interruptAndRerun{}
+ ire := &core.InterruptSignal{}
if errors.As(err, &ire) {
- return ire.Extra, true
+ return ire.Info, ire.State, true
}
- return nil, false
+ return nil, nil, false
}
type InterruptInfo struct {
- State any
- BeforeNodes []string
- AfterNodes []string
- RerunNodes []string
- RerunNodesExtra map[string]any
- SubGraphs map[string]*InterruptInfo
+ State any
+ BeforeNodes []string
+ AfterNodes []string
+ RerunNodes []string
+ RerunNodesExtra map[string]any
+ SubGraphs map[string]*InterruptInfo
+ InterruptContexts []*InterruptCtx
}
func init() {
- schema.RegisterName[*InterruptInfo]("_eino_compose_interrupt_info") // TODO: check if this is really needed when refactoring adk resume
+ schema.RegisterName[*InterruptInfo]("_eino_compose_interrupt_info")
}
+// AddressSegmentType defines the type of a segment in an execution address.
+type AddressSegmentType = core.AddressSegmentType
+
+const (
+ // AddressSegmentNode represents a segment of an address that corresponds to a graph node.
+ AddressSegmentNode AddressSegmentType = "node"
+ // AddressSegmentTool represents a segment of an address that corresponds to a specific tool call within a ToolsNode.
+ AddressSegmentTool AddressSegmentType = "tool"
+ // AddressSegmentRunnable represents a segment of an address that corresponds to an instance of the Runnable interface.
+ // Currently the possible Runnable types are: Graph, Workflow and Chain.
+ // Note that for sub-graphs added through AddGraphNode to another graph is not a Runnable.
+ // So a AddressSegmentRunnable indicates a standalone Root level Graph,
+ // or a Root level Graph inside a node such as Lambda node.
+ AddressSegmentRunnable AddressSegmentType = "runnable"
+)
+
+// Address represents a full, hierarchical address to a point in the execution structure.
+type Address = core.Address
+
+// AddressSegment represents a single segment in the hierarchical address of an execution point.
+// A sequence of AddressSegments uniquely identifies a location within a potentially nested structure.
+type AddressSegment = core.AddressSegment
+
+// InterruptCtx provides a complete, user-facing context for a single, resumable interrupt point.
+type InterruptCtx = core.InterruptCtx
+
func ExtractInterruptInfo(err error) (info *InterruptInfo, existed bool) {
if err == nil {
return nil, false
@@ -110,6 +328,8 @@ func isSubGraphInterrupt(err error) *subGraphInterruptError {
type subGraphInterruptError struct {
Info *InterruptInfo
CheckPoint *checkpoint
+
+ signal *core.InterruptSignal
}
func (e *subGraphInterruptError) Error() string {
diff --git a/compose/resume.go b/compose/resume.go
new file mode 100644
index 00000000..a4513fcf
--- /dev/null
+++ b/compose/resume.go
@@ -0,0 +1,156 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package compose
+
+import (
+ "context"
+
+ "github.com/cloudwego/eino/internal/core"
+)
+
+// GetInterruptState provides a type-safe way to check for and retrieve the persisted state from a previous interruption.
+// It is the primary function a component should use to understand its past state.
+//
+// It returns three values:
+// - wasInterrupted (bool): True if the node was part of a previous interruption, regardless of whether state was provided.
+// - state (T): The typed state object, if it was provided and matches type `T`.
+// - hasState (bool): True if state was provided during the original interrupt and successfully cast to type `T`.
+func GetInterruptState[T any](ctx context.Context) (wasInterrupted bool, hasState bool, state T) {
+ return core.GetInterruptState[T](ctx)
+}
+
+// GetResumeContext checks if the current component is the target of a resume operation
+// and retrieves any data provided by the user for that resumption.
+//
+// This function is typically called *after* a component has already determined it is in a
+// resumed state by calling GetInterruptState.
+//
+// It returns three values:
+// - isResumeFlow: A boolean that is true if the current component's address was explicitly targeted
+// by a call to Resume() or ResumeWithData().
+// - hasData: A boolean that is true if data was provided for this component (i.e., not nil).
+// - data: The typed data provided by the user.
+//
+// ### How to Use This Function: A Decision Framework
+//
+// The correct usage pattern depends on the application's desired resume strategy.
+//
+// #### Strategy 1: Implicit "Resume All"
+// In some use cases, any resume operation implies that *all* interrupted points should proceed.
+// For example, if an application's UI only provides a single "Continue" button for a set of
+// interruptions. In this model, a component can often just use `GetInterruptState` to see if
+// `wasInterrupted` is true and then proceed with its logic, as it can assume it is an intended target.
+// It may still call `GetResumeContext` to check for optional data, but the `isResumeFlow` flag is less critical.
+//
+// #### Strategy 2: Explicit "Targeted Resume" (Most Common)
+// For applications with multiple, distinct interrupt points that must be resumed independently, it is
+// crucial to differentiate which point is being resumed. This is the primary use case for the `isResumeFlow` flag.
+// - If `isResumeFlow` is `true`: Your component is the explicit target. You should consume
+// the `data` (if any) and complete your work.
+// - If `isResumeFlow` is `false`: Another component is the target. You MUST re-interrupt
+// (e.g., by returning `StatefulInterrupt(...)`) to preserve your state and allow the
+// resume signal to propagate.
+//
+// ### Guidance for Composite Components
+//
+// Composite components (like `Graph` or other `Runnable`s that contain sub-processes) have a dual role:
+// 1. Check for Self-Targeting: A composite component can itself be the target of a resume
+// operation, for instance, to modify its internal state. It may call `GetResumeContext`
+// to check for data targeted at its own address.
+// 2. Act as a Conduit: After checking for itself, its primary role is to re-execute its children,
+// allowing the resume context to flow down to them. It must not consume a resume signal
+// intended for one of its descendants.
+func GetResumeContext[T any](ctx context.Context) (isResumeFlow bool, hasData bool, data T) {
+ return core.GetResumeContext[T](ctx)
+}
+
+// GetCurrentAddress returns the hierarchical address of the currently executing component.
+// The address is a sequence of segments, each identifying a structural part of the execution
+// like an agent, a graph node, or a tool call. This can be useful for logging or debugging.
+func GetCurrentAddress(ctx context.Context) Address {
+ return core.GetCurrentAddress(ctx)
+}
+
+// Resume prepares a context for an "Explicit Targeted Resume" operation by targeting one or more
+// components without providing data. It is a convenience wrapper around BatchResumeWithData.
+//
+// This is useful when the act of resuming is itself the signal, and no extra data is needed.
+// The components at the provided addresses (interrupt IDs) will receive `isResumeFlow = true`
+// when they call `GetResumeContext`.
+func Resume(ctx context.Context, interruptIDs ...string) context.Context {
+ resumeData := make(map[string]any, len(interruptIDs))
+ for _, addr := range interruptIDs {
+ resumeData[addr] = nil
+ }
+ return BatchResumeWithData(ctx, resumeData)
+}
+
+// ResumeWithData prepares a context to resume a single, specific component with data.
+// It is the primary function for the "Explicit Targeted Resume" strategy when data is required.
+// It is a convenience wrapper around BatchResumeWithData.
+// The `interruptID` parameter is the unique interrupt ID of the target component.
+func ResumeWithData(ctx context.Context, interruptID string, data any) context.Context {
+ return BatchResumeWithData(ctx, map[string]any{interruptID: data})
+}
+
+// BatchResumeWithData is the core function for preparing a resume context. It injects a map
+// of resume targets and their corresponding data into the context.
+//
+// The `resumeData` map should contain the interrupt IDs (which are the string form of addresses) of the
+// components to be resumed as keys. The value can be the resume data for that component, or `nil`
+// if no data is needed (equivalent to using `Resume`).
+//
+// This function is the foundation for the "Explicit Targeted Resume" strategy. Components whose interrupt IDs
+// are present as keys in the map will receive `isResumeFlow = true` when they call `GetResumeContext`.
+func BatchResumeWithData(ctx context.Context, resumeData map[string]any) context.Context {
+ return core.BatchResumeWithData(ctx, resumeData)
+}
+
+func getNodePath(ctx context.Context) (*NodePath, bool) {
+ currentAddress := GetCurrentAddress(ctx)
+ if len(currentAddress) == 0 {
+ return nil, false
+ }
+
+ nodePath := make([]string, 0, len(currentAddress))
+ for _, p := range currentAddress {
+ if p.Type == AddressSegmentRunnable {
+ nodePath = []string{}
+ continue
+ }
+
+ nodePath = append(nodePath, p.ID)
+ }
+
+ return NewNodePath(nodePath...), len(nodePath) > 0
+}
+
+// AppendAddressSegment creates a new execution context for a sub-component (e.g., a graph node or a tool call).
+//
+// It extends the current context's address with a new segment and populates the new context with the
+// appropriate interrupt state and resume data for that specific sub-address.
+//
+// - ctx: The parent context, typically the one passed into the component's Invoke/Stream method.
+// - segType: The type of the new address segment (e.g., "node", "tool").
+// - segID: The unique ID for the new address segment.
+func AppendAddressSegment(ctx context.Context, segType AddressSegmentType, segID string) context.Context {
+ return core.AppendAddressSegment(ctx, segType, segID, "")
+}
+
+func appendToolAddressSegment(ctx context.Context, segID string, subID string) context.Context {
+ return core.AppendAddressSegment(ctx, AddressSegmentTool, segID, subID)
+}
diff --git a/compose/resume_test.go b/compose/resume_test.go
new file mode 100644
index 00000000..577f590e
--- /dev/null
+++ b/compose/resume_test.go
@@ -0,0 +1,928 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package compose
+
+import (
+ "context"
+ "encoding/json"
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+ "go.uber.org/mock/gomock"
+
+ "github.com/cloudwego/eino/components/model"
+ "github.com/cloudwego/eino/components/tool"
+ mockModel "github.com/cloudwego/eino/internal/mock/components/model"
+ "github.com/cloudwego/eino/schema"
+)
+
+type myInterruptState struct {
+ OriginalInput string
+}
+
+type myResumeData struct {
+ Message string
+}
+
+func TestInterruptStateAndResumeForRootGraph(t *testing.T) {
+ // create a graph with a lambda node
+ // this lambda node will interrupt with a typed state and an info for end-user
+ // verify the info thrown by the lambda node
+ // resume with a structured resume data
+ // within the lambda node, getRunCtx and verify the state and resume data
+ g := NewGraph[string, string]()
+
+ lambda := InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ wasInterrupted, hasState, state := GetInterruptState[*myInterruptState](ctx)
+ if !wasInterrupted {
+ // First run: interrupt with state
+ return "", StatefulInterrupt(ctx,
+ map[string]any{"reason": "scheduled maintenance"},
+ &myInterruptState{OriginalInput: input},
+ )
+ }
+
+ // This is a resumed run.
+ assert.True(t, hasState)
+ assert.Equal(t, "initial input", state.OriginalInput)
+
+ isResume, hasData, data := GetResumeContext[*myResumeData](ctx)
+ assert.True(t, isResume)
+ assert.True(t, hasData)
+ assert.Equal(t, "let's continue", data.Message)
+
+ return "Resumed successfully with input: " + state.OriginalInput, nil
+ })
+
+ _ = g.AddLambdaNode("lambda", lambda)
+ _ = g.AddEdge(START, "lambda")
+ _ = g.AddEdge("lambda", END)
+
+ graph, err := g.Compile(context.Background(), WithCheckPointStore(newInMemoryStore()), WithGraphName("root"))
+ assert.NoError(t, err)
+
+ // First invocation, which should be interrupted
+ checkPointID := "test-checkpoint-1"
+ _, err = graph.Invoke(context.Background(), "initial input", WithCheckPointID(checkPointID))
+
+ // Verify the interrupt error and extracted info
+ assert.Error(t, err)
+ interruptInfo, isInterrupt := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt)
+ assert.NotNil(t, interruptInfo)
+
+ interruptContexts := interruptInfo.InterruptContexts
+ assert.Equal(t, 1, len(interruptContexts))
+ assert.Equal(t, "runnable:root;node:lambda", interruptContexts[0].Address.String())
+ assert.Equal(t, map[string]any{"reason": "scheduled maintenance"}, interruptContexts[0].Info)
+
+ // Prepare resume data
+ ctx := ResumeWithData(context.Background(), interruptContexts[0].ID,
+ &myResumeData{Message: "let's continue"})
+
+ // Resume execution
+ output, err := graph.Invoke(ctx, "", WithCheckPointID(checkPointID))
+
+ // Verify the final result
+ assert.NoError(t, err)
+ assert.Equal(t, "Resumed successfully with input: initial input", output)
+}
+
+func TestInterruptStateAndResumeForSubGraph(t *testing.T) {
+ // create a graph
+ // create a another graph with a lambda node, as this graph as a sub-graph of the previous graph
+ // this lambda node will interrupt with a typed state and an info for end-user
+ // verify the info thrown by the lambda node
+ // resume with a structured resume data
+ // within the lambda node, getRunCtx and verify the state and resume data
+ subGraph := NewGraph[string, string]()
+
+ lambda := InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ wasInterrupted, hasState, state := GetInterruptState[*myInterruptState](ctx)
+ if !wasInterrupted {
+ // First run: interrupt with state
+ return "", StatefulInterrupt(ctx,
+ map[string]any{"reason": "sub-graph maintenance"},
+ &myInterruptState{OriginalInput: input},
+ )
+ }
+
+ // Second (resumed) run
+ assert.True(t, hasState)
+ assert.Equal(t, "main input", state.OriginalInput)
+
+ isResume, hasData, data := GetResumeContext[*myResumeData](ctx)
+ assert.True(t, isResume)
+ assert.True(t, hasData)
+ assert.Equal(t, "let's continue sub-graph", data.Message)
+
+ return "Sub-graph resumed successfully", nil
+ })
+
+ _ = subGraph.AddLambdaNode("inner_lambda", lambda)
+ _ = subGraph.AddEdge(START, "inner_lambda")
+ _ = subGraph.AddEdge("inner_lambda", END)
+
+ // Create the main graph
+ mainGraph := NewGraph[string, string]()
+ _ = mainGraph.AddGraphNode("sub_graph_node", subGraph)
+ _ = mainGraph.AddEdge(START, "sub_graph_node")
+ _ = mainGraph.AddEdge("sub_graph_node", END)
+
+ compiledMainGraph, err := mainGraph.Compile(context.Background(), WithCheckPointStore(newInMemoryStore()))
+ assert.NoError(t, err)
+
+ // First invocation, which should be interrupted
+ checkPointID := "test-subgraph-checkpoint-1"
+ _, err = compiledMainGraph.Invoke(context.Background(), "main input", WithCheckPointID(checkPointID))
+
+ // Verify the interrupt error and extracted info
+ assert.Error(t, err)
+ interruptInfo, isInterrupt := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt)
+ assert.NotNil(t, interruptInfo)
+
+ interruptContexts := interruptInfo.InterruptContexts
+ assert.Equal(t, 1, len(interruptContexts))
+ assert.Equal(t, "runnable:;node:sub_graph_node;node:inner_lambda", interruptContexts[0].Address.String())
+ assert.Equal(t, map[string]any{"reason": "sub-graph maintenance"}, interruptContexts[0].Info)
+
+ // Prepare resume data
+ ctx := ResumeWithData(context.Background(), interruptContexts[0].ID,
+ &myResumeData{Message: "let's continue sub-graph"})
+
+ // Resume execution
+ output, err := compiledMainGraph.Invoke(ctx, "", WithCheckPointID(checkPointID))
+
+ // Verify the final result
+ assert.NoError(t, err)
+ assert.Equal(t, "Sub-graph resumed successfully", output)
+}
+
+func TestInterruptStateAndResumeForToolInNestedSubGraph(t *testing.T) {
+ // create a ROOT graph.
+ // create a sub graph A, add A to ROOT graph using AddGraphNode.
+ // create a sub-sub graph B, add B to A using AddGraphNode.
+ // within sub-sub graph B, add a ChatModelNode, which is a Mock chat model that implements the ToolCallingChatModel
+ // interface.
+ // add a Mock InvokableTool to this mock chat model.
+ // within sub-sub graph B, also add a ToolsNode that will execute this Mock InvokableTool.
+ // this tool will interrupt with a typed state and an info for end-user
+ // verify the info thrown by the tool.
+ // resume with a structured resume data.
+ // within the Tool, getRunCtx and verify the state and resume data
+ ctrl := gomock.NewController(t)
+
+ // 1. Define the interrupting tool
+ mockTool := &mockInterruptingTool{tt: t}
+
+ // 2. Define the sub-sub-graph (B)
+ subSubGraphB := NewGraph[[]*schema.Message, []*schema.Message]()
+
+ // Mock Chat Model that calls the tool
+ mockChatModel := mockModel.NewMockToolCallingChatModel(ctrl)
+ mockChatModel.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).Return(&schema.Message{
+ Role: schema.Assistant,
+ ToolCalls: []schema.ToolCall{
+ {ID: "tool_call_123", Function: schema.FunctionCall{Name: "interrupt_tool", Arguments: `{"input": "test"}`}},
+ },
+ }, nil).AnyTimes()
+ mockChatModel.EXPECT().WithTools(gomock.Any()).Return(mockChatModel, nil).AnyTimes()
+
+ toolsNode, err := NewToolNode(context.Background(), &ToolsNodeConfig{Tools: []tool.BaseTool{mockTool}})
+ assert.NoError(t, err)
+
+ _ = subSubGraphB.AddChatModelNode("model", mockChatModel)
+ _ = subSubGraphB.AddToolsNode("tools", toolsNode)
+ _ = subSubGraphB.AddEdge(START, "model")
+ _ = subSubGraphB.AddEdge("model", "tools")
+ _ = subSubGraphB.AddEdge("tools", END)
+
+ // 3. Define sub-graph (A)
+ subGraphA := NewGraph[[]*schema.Message, []*schema.Message]()
+ _ = subGraphA.AddGraphNode("sub_graph_b", subSubGraphB)
+ _ = subGraphA.AddEdge(START, "sub_graph_b")
+ _ = subGraphA.AddEdge("sub_graph_b", END)
+
+ // 4. Define root graph
+ rootGraph := NewGraph[[]*schema.Message, []*schema.Message]()
+ _ = rootGraph.AddGraphNode("sub_graph_a", subGraphA)
+ _ = rootGraph.AddEdge(START, "sub_graph_a")
+ _ = rootGraph.AddEdge("sub_graph_a", END)
+
+ // 5. Compile and run
+ compiledRootGraph, err := rootGraph.Compile(context.Background(), WithCheckPointStore(newInMemoryStore()),
+ WithGraphName("root"))
+ assert.NoError(t, err)
+
+ // First invocation - should interrupt
+ checkPointID := "test-nested-tool-interrupt"
+ initialInput := []*schema.Message{schema.UserMessage("hello")}
+ _, err = compiledRootGraph.Invoke(context.Background(), initialInput, WithCheckPointID(checkPointID))
+
+ // 6. Verify the interrupt
+ assert.Error(t, err)
+ interruptInfo, isInterrupt := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt)
+ assert.NotNil(t, interruptInfo)
+
+ interruptContexts := interruptInfo.InterruptContexts
+ assert.Len(t, interruptContexts, 1) // Only the root cause is returned
+
+ // Verify the root cause context
+ rootCause := interruptContexts[0]
+ expectedPath := "runnable:root;node:sub_graph_a;node:sub_graph_b;node:tools;tool:interrupt_tool:tool_call_123"
+ assert.Equal(t, expectedPath, rootCause.Address.String())
+ assert.True(t, rootCause.IsRootCause)
+ assert.Equal(t, map[string]any{"reason": "tool maintenance"}, rootCause.Info)
+
+ // Verify the parent via the Parent field
+ assert.NotNil(t, rootCause.Parent)
+ assert.Equal(t, "runnable:root;node:sub_graph_a;node:sub_graph_b;node:tools", rootCause.Parent.Address.String())
+ assert.False(t, rootCause.Parent.IsRootCause)
+
+ // 7. Resume execution
+ ctx := ResumeWithData(context.Background(), rootCause.ID, &myResumeData{Message: "let's continue tool"})
+ output, err := compiledRootGraph.Invoke(ctx, initialInput, WithCheckPointID(checkPointID))
+
+ // 8. Verify final result
+ assert.NoError(t, err)
+ assert.NotNil(t, output)
+ assert.Len(t, output, 1)
+ assert.Equal(t, "Tool resumed successfully", output[0].Content)
+}
+
+const PathSegmentTypeProcess AddressSegmentType = "process"
+
+// processState is the state for a single sub-process in the batch test.
+type processState struct {
+ Step int
+}
+
+// batchState is the composite state for the whole batch lambda.
+type batchState struct {
+ ProcessStates map[string]*processState
+ Results map[string]string
+}
+
+type processResumeData struct {
+ Instruction string
+}
+
+func init() {
+ schema.RegisterName[*myInterruptState]("my_interrupt_state")
+ schema.RegisterName[*batchState]("batch_state")
+ schema.RegisterName[*processState]("process_state")
+}
+
+func TestMultipleInterruptsAndResumes(t *testing.T) {
+ // define a new lambda node that act as a 'batch' node
+ // it kick starts 3 parallel processes, each will interrupt on first run, while preserving their own state.
+ // each of the process should have their own user-facing interrupt info.
+ // define a new AddressSegmentType for these sub processes.
+ // the lambda should use StatefulInterrupt to interrupt and preserve the state,
+ // which is a specific struct type that implements the CompositeInterruptState interface.
+ // there should also be a specific struct that that implements the CompositeInterruptInfo interface,
+ // which helps the end-user to fetch the nested interrupt info.
+ // put this lambda node within a graph and invoke the graph.
+ // simulate the user getting the flat list of 3 interrupt points using GetInterruptContexts
+ // the user then decides to resume two of the three interrupt points
+ // the first resume has resume data, while the second resume does not.(ResumeWithData vs. Resume)
+ // verify the resume data and state for the resumed interrupt points.
+ processIDs := []string{"p0", "p1", "p2"}
+
+ // This is the logic for a single "process"
+ runProcess := func(ctx context.Context, id string) (string, error) {
+ // Check if this specific process was interrupted before
+ wasInterrupted, hasState, pState := GetInterruptState[*processState](ctx)
+ if !wasInterrupted {
+ // First run for this process, interrupt it.
+ return "", StatefulInterrupt(ctx,
+ map[string]any{"reason": "process " + id + " needs input"},
+ &processState{Step: 1},
+ )
+ }
+
+ assert.True(t, hasState)
+ assert.Equal(t, 1, pState.Step)
+
+ // Check if we are being resumed
+ isResume, hasData, pData := GetResumeContext[*processResumeData](ctx)
+ if !isResume {
+ // Not being resumed, so interrupt again.
+ return "", StatefulInterrupt(ctx,
+ map[string]any{"reason": "process " + id + " still needs input"},
+ pState,
+ )
+ }
+
+ // We are being resumed.
+ if hasData {
+ // Resumed with data
+ return "process " + id + " done with instruction: " + pData.Instruction, nil
+ }
+ // Resumed without data
+ return "process " + id + " done", nil
+ }
+
+ // This is the main "batch" lambda that orchestrates the processes
+ batchLambda := InvokableLambda(func(ctx context.Context, _ string) (map[string]string, error) {
+ // Restore the state of the batch node itself
+ _, _, persistedBatchState := GetInterruptState[*batchState](ctx)
+ if persistedBatchState == nil {
+ persistedBatchState = &batchState{
+ Results: make(map[string]string),
+ }
+ }
+
+ var errs []error
+
+ for _, id := range processIDs {
+ // If this process already completed in a previous run, skip it.
+ if _, done := persistedBatchState.Results[id]; done {
+ continue
+ }
+
+ // Create a sub-context for each process
+ subCtx := AppendAddressSegment(ctx, PathSegmentTypeProcess, id)
+ res, err := runProcess(subCtx, id)
+
+ if err != nil {
+ _, ok := IsInterruptRerunError(err)
+ assert.True(t, ok)
+ errs = append(errs, err)
+ } else {
+ // Process completed, save its result to the state for the next run.
+ persistedBatchState.Results[id] = res
+ }
+ }
+
+ if len(errs) > 0 {
+ return nil, CompositeInterrupt(ctx, nil, persistedBatchState, errs...)
+ }
+
+ return persistedBatchState.Results, nil
+ })
+
+ g := NewGraph[string, map[string]string]()
+ _ = g.AddLambdaNode("batch", batchLambda)
+ _ = g.AddEdge(START, "batch")
+ _ = g.AddEdge("batch", END)
+
+ graph, err := g.Compile(context.Background(), WithCheckPointStore(newInMemoryStore()),
+ WithGraphName("root"))
+ assert.NoError(t, err)
+
+ // --- 1. First invocation, all 3 processes should interrupt ---
+ checkPointID := "multi-interrupt-test"
+ _, err = graph.Invoke(context.Background(), "", WithCheckPointID(checkPointID))
+
+ assert.Error(t, err)
+ interruptInfo, isInterrupt := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt)
+ interruptContexts := interruptInfo.InterruptContexts
+ assert.Len(t, interruptContexts, 3) // Only the 3 root causes
+
+ found := make(map[string]bool)
+ addrToID := make(map[string]string)
+ var parentCtx *InterruptCtx
+ for _, iCtx := range interruptContexts {
+ addrStr := iCtx.Address.String()
+ found[addrStr] = true
+ addrToID[addrStr] = iCtx.ID
+ assert.True(t, iCtx.IsRootCause)
+ assert.Equal(t, map[string]any{"reason": "process " + iCtx.Address[2].ID + " needs input"}, iCtx.Info)
+ // Check that all share the same parent
+ assert.NotNil(t, iCtx.Parent)
+ if parentCtx == nil {
+ parentCtx = iCtx.Parent
+ assert.Equal(t, "runnable:root;node:batch", parentCtx.Address.String())
+ assert.False(t, parentCtx.IsRootCause)
+ } else {
+ assert.Same(t, parentCtx, iCtx.Parent)
+ }
+ }
+ assert.True(t, found["runnable:root;node:batch;process:p0"])
+ assert.True(t, found["runnable:root;node:batch;process:p1"])
+ assert.True(t, found["runnable:root;node:batch;process:p2"])
+
+ // --- 2. Second invocation, resume 2 of 3 processes ---
+ // Resume p0 with data, and p2 without data. p1 remains interrupted.
+ resumeCtx := ResumeWithData(context.Background(), addrToID["runnable:root;node:batch;process:p0"], &processResumeData{Instruction: "do it"})
+ resumeCtx = Resume(resumeCtx, addrToID["runnable:root;node:batch;process:p2"])
+
+ _, err = graph.Invoke(resumeCtx, "", WithCheckPointID(checkPointID))
+
+ // Expect an interrupt again, but only for p1
+ assert.Error(t, err)
+ interruptInfo2, isInterrupt2 := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt2)
+ interruptContexts2 := interruptInfo2.InterruptContexts
+ assert.Len(t, interruptContexts2, 1) // Only p1 is left
+ rootCause2 := interruptContexts2[0]
+ assert.Equal(t, "runnable:root;node:batch;process:p1", rootCause2.Address.String())
+ assert.NotNil(t, rootCause2.Parent)
+ assert.Equal(t, "runnable:root;node:batch", rootCause2.Parent.Address.String())
+
+ // --- 3. Third invocation, resume the last process ---
+ finalResumeCtx := Resume(context.Background(), rootCause2.ID)
+ finalOutput, err := graph.Invoke(finalResumeCtx, "", WithCheckPointID(checkPointID))
+
+ assert.NoError(t, err)
+ assert.Equal(t, "process p0 done with instruction: do it", finalOutput["p0"])
+ assert.Equal(t, "process p1 done", finalOutput["p1"])
+ assert.Equal(t, "process p2 done", finalOutput["p2"])
+}
+
+// mockReentryTool is a helper for the reentry test
+type mockReentryTool struct {
+ t *testing.T
+}
+
+func (t *mockReentryTool) Info(_ context.Context) (*schema.ToolInfo, error) {
+ return &schema.ToolInfo{
+ Name: "reentry_tool",
+ Desc: "A tool that can be re-entered in a resumed graph.",
+ ParamsOneOf: schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{"input": {Type: schema.String}}),
+ }, nil
+}
+
+func (t *mockReentryTool) InvokableRun(ctx context.Context, _ string, _ ...tool.Option) (string, error) {
+ wasInterrupted, hasState, _ := GetInterruptState[any](ctx)
+ isResume, hasData, data := GetResumeContext[*myResumeData](ctx)
+
+ callID := GetToolCallID(ctx)
+
+ // Special handling for the re-entrant call to make assertions explicit.
+ if callID == "call_3" {
+ if !isResume {
+ // This is the first run of the re-entrant call. Its context must be clean.
+ // This is the core assertion for this test.
+ assert.False(t.t, wasInterrupted, "re-entrant call 'call_3' should not have been interrupted on its first run")
+ assert.False(t.t, hasState, "re-entrant call 'call_3' should not have state on its first run")
+ // Now, interrupt it as part of the test flow.
+ return "", StatefulInterrupt(ctx, nil, "some state for "+callID)
+ }
+ // This is the resumed run of the re-entrant call.
+ assert.True(t.t, wasInterrupted, "resumed call 'call_3' must have been interrupted")
+ assert.True(t.t, hasData, "resumed call 'call_3' should have data")
+ return "Resumed " + data.Message, nil
+ }
+
+ // Standard logic for the initial calls (call_1, call_2)
+ if !wasInterrupted {
+ // First run for call_1 and call_2, should interrupt.
+ return "", StatefulInterrupt(ctx, nil, "some state for "+callID)
+ }
+
+ // From here, wasInterrupted is true for call_1 and call_2.
+ if isResume {
+ // The user is explicitly resuming this call.
+ assert.True(t.t, hasData, "call %s should have resume data", callID)
+ return "Resumed " + data.Message, nil
+ }
+
+ // The tool was interrupted before, but is not being resumed now. Re-interrupt.
+ return "", StatefulInterrupt(ctx, nil, "some state for "+callID)
+}
+
+func TestReentryForResumedTools(t *testing.T) {
+ // create a 'ReAct' style graph with a ChatModel node and a ToolsNode.
+ // within the ToolsNode there is an interruptible tool that will emit interrupt on first run.
+ // During the first invocation of the graph, there should be two tool calls (of the same tool) that interrupt.
+ // The user chooses to resume one of the interrupted tool call in second invocation,
+ // and this time, the resumed tool call should be successful, while the other should interrupt immediately again.
+ // The user then chooses to resume the other interrupted tool call in third invocation,
+ // and this time, the ChatModel decides to call the tool again,
+ // and this time the tool's runCtx should think it was not interrupted nor resumed.
+ ctrl := gomock.NewController(t)
+
+ // 1. Define the interrupting tool
+ reentryTool := &mockReentryTool{t: t}
+
+ // 2. Define the graph
+ g := NewGraph[[]*schema.Message, *schema.Message]()
+
+ // Mock Chat Model that drives the ReAct loop
+ mockChatModel := mockModel.NewMockToolCallingChatModel(ctrl)
+ toolsNode, err := NewToolNode(context.Background(), &ToolsNodeConfig{Tools: []tool.BaseTool{reentryTool}})
+ assert.NoError(t, err)
+
+ // Expectation for the 1st invocation: model returns two tool calls
+ mockChatModel.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).Return(&schema.Message{
+ Role: schema.Assistant,
+ ToolCalls: []schema.ToolCall{
+ {ID: "call_1", Function: schema.FunctionCall{Name: "reentry_tool", Arguments: `{"input": "a"}`}},
+ {ID: "call_2", Function: schema.FunctionCall{Name: "reentry_tool", Arguments: `{"input": "b"}`}},
+ },
+ }, nil).Times(1)
+
+ // Expectation for the 2nd invocation (after resuming call_1): model does nothing, graph continues
+ // Expectation for the 3rd invocation (after resuming call_2): model calls the tool again
+ mockChatModel.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).DoAndReturn(func(ctx context.Context, msgs []*schema.Message, opts ...model.Option) (*schema.Message, error) {
+ return &schema.Message{
+ Role: schema.Assistant,
+ ToolCalls: []schema.ToolCall{
+ {ID: "call_3", Function: schema.FunctionCall{Name: "reentry_tool", Arguments: `{"input": "c"}`}},
+ },
+ }, nil
+ }).Times(1)
+
+ // Expectation for the final invocation: model returns final answer
+ mockChatModel.EXPECT().Generate(gomock.Any(), gomock.Any(), gomock.Any()).Return(&schema.Message{
+ Role: schema.Assistant,
+ Content: "all done",
+ }, nil).Times(1)
+
+ _ = g.AddChatModelNode("model", mockChatModel)
+ _ = g.AddToolsNode("tools", toolsNode)
+ _ = g.AddEdge(START, "model")
+
+ // Add the crucial branch to decide whether to call tools or end.
+ modelBranch := func(ctx context.Context, msg *schema.Message) (string, error) {
+ if len(msg.ToolCalls) > 0 {
+ return "tools", nil
+ }
+ return END, nil
+ }
+ err = g.AddBranch("model", NewGraphBranch(modelBranch, map[string]bool{"tools": true, END: true}))
+ assert.NoError(t, err)
+
+ _ = g.AddEdge("tools", "model") // Loop back for ReAct style
+
+ // 3. Compile and run
+ graph, err := g.Compile(context.Background(), WithCheckPointStore(newInMemoryStore()),
+ WithGraphName("root"))
+ assert.NoError(t, err)
+ checkPointID := "reentry-test"
+
+ // --- 1. First invocation: call_1 and call_2 should interrupt ---
+ _, err = graph.Invoke(context.Background(), []*schema.Message{schema.UserMessage("start")}, WithCheckPointID(checkPointID))
+ assert.Error(t, err)
+ interruptInfo1, _ := ExtractInterruptInfo(err)
+ interrupts1 := interruptInfo1.InterruptContexts
+ assert.Len(t, interrupts1, 2) // Only the two tool calls
+ found1 := make(map[string]bool)
+ addrToID1 := make(map[string]string)
+ for _, iCtx := range interrupts1 {
+ addrStr := iCtx.Address.String()
+ found1[addrStr] = true
+ addrToID1[addrStr] = iCtx.ID
+ assert.True(t, iCtx.IsRootCause)
+ assert.NotNil(t, iCtx.Parent)
+ assert.Equal(t, "runnable:root;node:tools", iCtx.Parent.Address.String())
+ }
+ assert.True(t, found1["runnable:root;node:tools;tool:reentry_tool:call_1"])
+ assert.True(t, found1["runnable:root;node:tools;tool:reentry_tool:call_2"])
+
+ // --- 2. Second invocation: resume call_1, expect call_2 to interrupt again ---
+ resumeCtx2 := ResumeWithData(context.Background(), addrToID1["runnable:root;node:tools;tool:reentry_tool:call_1"],
+ &myResumeData{Message: "resume call 1"})
+ _, err = graph.Invoke(resumeCtx2, []*schema.Message{schema.UserMessage("start")}, WithCheckPointID(checkPointID))
+ assert.Error(t, err)
+ interruptInfo2, _ := ExtractInterruptInfo(err)
+ interrupts2 := interruptInfo2.InterruptContexts
+ assert.Len(t, interrupts2, 1) // Only call_2
+ rootCause2 := interrupts2[0]
+ assert.Equal(t, "runnable:root;node:tools;tool:reentry_tool:call_2", rootCause2.Address.String())
+ assert.NotNil(t, rootCause2.Parent)
+ assert.Equal(t, "runnable:root;node:tools", rootCause2.Parent.Address.String())
+
+ // --- 3. Third invocation: resume call_2, model makes a new call (call_3) which should interrupt ---
+ resumeCtx3 := ResumeWithData(context.Background(), rootCause2.ID, &myResumeData{Message: "resume call 2"})
+ _, err = graph.Invoke(resumeCtx3, []*schema.Message{schema.UserMessage("start")}, WithCheckPointID(checkPointID))
+ assert.Error(t, err)
+ interruptInfo3, _ := ExtractInterruptInfo(err)
+ interrupts3 := interruptInfo3.InterruptContexts
+ assert.Len(t, interrupts3, 1) // Only call_3
+ rootCause3 := interrupts3[0]
+ assert.Equal(t, "runnable:root;node:tools;tool:reentry_tool:call_3", rootCause3.Address.String()) // Note: this is the new call_3
+ assert.NotNil(t, rootCause3.Parent)
+ assert.Equal(t, "runnable:root;node:tools", rootCause3.Parent.Address.String())
+
+ // --- 4. Final invocation: resume call_3, expect final answer ---
+ resumeCtx4 := ResumeWithData(context.Background(), rootCause3.ID,
+ &myResumeData{Message: "resume call 3"})
+ output, err := graph.Invoke(resumeCtx4, []*schema.Message{schema.UserMessage("start")}, WithCheckPointID(checkPointID))
+ assert.NoError(t, err)
+ assert.Equal(t, "all done", output.Content)
+}
+
+// mockInterruptingTool is a helper for the nested tool interrupt test
+type mockInterruptingTool struct {
+ tt *testing.T
+}
+
+func (t *mockInterruptingTool) Info(_ context.Context) (*schema.ToolInfo, error) {
+ return &schema.ToolInfo{
+ Name: "interrupt_tool",
+ Desc: "A tool that interrupts execution.",
+ ParamsOneOf: schema.NewParamsOneOfByParams(map[string]*schema.ParameterInfo{
+ "input": {Type: schema.String, Desc: "Some input", Required: true},
+ }),
+ }, nil
+}
+
+func (t *mockInterruptingTool) InvokableRun(ctx context.Context, argumentsInJSON string, _ ...tool.Option) (string, error) {
+ var args map[string]string
+ _ = json.Unmarshal([]byte(argumentsInJSON), &args)
+
+ wasInterrupted, hasState, state := GetInterruptState[*myInterruptState](ctx)
+ if !wasInterrupted {
+ // First run: interrupt
+ return "", StatefulInterrupt(ctx,
+ map[string]any{"reason": "tool maintenance"},
+ &myInterruptState{OriginalInput: args["input"]},
+ )
+ }
+
+ // Second (resumed) run
+ assert.True(t.tt, hasState)
+ assert.Equal(t.tt, "test", state.OriginalInput)
+
+ isResume, hasData, data := GetResumeContext[*myResumeData](ctx)
+ assert.True(t.tt, isResume)
+ assert.True(t.tt, hasData)
+ assert.Equal(t.tt, "let's continue tool", data.Message)
+
+ return "Tool resumed successfully", nil
+}
+
+func TestGraphInterruptWithinLambda(t *testing.T) {
+ // this test case aims to verify behaviors when a standalone graph is within a lambda,
+ // which in turn is within the root graph.
+ // the expected behavior is:
+ // - internal graph will naturally append to the Address
+ // - internal graph interrupts, where the Address includes steps for both the root graph and the internal graph
+ // - lambda extracts InterruptInfo, then GetInterruptContexts
+ // - lambda then acts as a composite node, uses CompositeInterrupt to pass up the
+ // internal interrupt points
+ // - the root graph interrupts
+ // - end-user extracts the interrupt ID and related info
+ // - end-user uses ResumeWithData to resume the ID
+ // - lambda node resumes, invokes the inner graph as usual
+ // - the internal graph resumes the interrupted node
+ // To implement this test, within the internal graph you can define another lambda node that can interrupt resume.
+
+ // 1. Define the innermost lambda that actually interrupts
+ interruptingLambda := InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ wasInterrupted, hasState, state := GetInterruptState[*myInterruptState](ctx)
+ if !wasInterrupted {
+ return "", StatefulInterrupt(ctx, "inner interrupt", &myInterruptState{OriginalInput: input})
+ }
+
+ assert.True(t, hasState)
+ assert.Equal(t, "top level input", state.OriginalInput)
+
+ isResume, hasData, data := GetResumeContext[*myResumeData](ctx)
+ assert.True(t, isResume)
+ assert.True(t, hasData)
+ assert.Equal(t, "resume inner", data.Message)
+
+ return "inner lambda resumed successfully", nil
+ })
+
+ // 2. Define the internal graph that contains the interrupting lambda
+ innerGraph := NewGraph[string, string]()
+ _ = innerGraph.AddLambdaNode("inner_lambda", interruptingLambda)
+ _ = innerGraph.AddEdge(START, "inner_lambda")
+ _ = innerGraph.AddEdge("inner_lambda", END)
+ // Give the inner graph a name so it can create its "runnable" addr step.
+ compiledInnerGraph, err := innerGraph.Compile(context.Background(), WithGraphName("inner"), WithCheckPointStore(newInMemoryStore()))
+ assert.NoError(t, err)
+
+ // 3. Define the outer lambda that acts as a composite node
+ compositeLambda := InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ // The lambda invokes the inner graph. If the inner graph interrupts, this lambda
+ // must act as a proper composite node and wrap the error.
+ output, err := compiledInnerGraph.Invoke(ctx, input, WithCheckPointID("inner-cp"))
+ if err != nil {
+ _, isInterrupt := ExtractInterruptInfo(err)
+ if !isInterrupt {
+ return "", err // Not an interrupt, just fail
+ }
+
+ // The composite interrupt itself can be stateless, as it's just a wrapper.
+ // It signals to the framework to look inside the subErrs and correctly
+ // prepend the current addr to the paths of the inner interrupts.
+ return "", CompositeInterrupt(ctx, "composite interrupt from lambda", nil, err)
+ }
+ return output, nil
+ })
+
+ // 4. Define the root graph
+ rootGraph := NewGraph[string, string]()
+ _ = rootGraph.AddLambdaNode("composite_lambda", compositeLambda)
+ _ = rootGraph.AddEdge(START, "composite_lambda")
+ _ = rootGraph.AddEdge("composite_lambda", END)
+ // Give the root graph a name for its "runnable" addr step.
+ compiledRootGraph, err := rootGraph.Compile(context.Background(), WithGraphName("root"), WithCheckPointStore(newInMemoryStore()))
+ assert.NoError(t, err)
+
+ // 5. First invocation - should interrupt
+ checkPointID := "graph-in-lambda-test"
+ _, err = compiledRootGraph.Invoke(context.Background(), "top level input", WithCheckPointID(checkPointID))
+
+ // 6. Verify the interrupt
+ assert.Error(t, err)
+ interruptInfo, isInterrupt := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt)
+ interruptContexts := interruptInfo.InterruptContexts
+ assert.Len(t, interruptContexts, 1) // Only the root cause is returned
+
+ // The addr is now fully qualified, including the runnable steps from both graphs.
+ rootCause := interruptContexts[0]
+ expectedPath := "runnable:root;node:composite_lambda;runnable:inner;node:inner_lambda"
+ assert.Equal(t, expectedPath, rootCause.Address.String())
+ assert.Equal(t, "inner interrupt", rootCause.Info)
+ assert.True(t, rootCause.IsRootCause)
+
+ // Check parent hierarchy
+ assert.NotNil(t, rootCause.Parent)
+ assert.Equal(t, "runnable:root;node:composite_lambda;runnable:inner", rootCause.Parent.Address.String())
+ assert.Nil(t, rootCause.Parent.Info) // The inner runnable doesn't have its own info
+ assert.False(t, rootCause.Parent.IsRootCause)
+
+ // Check grandparent
+ assert.NotNil(t, rootCause.Parent.Parent)
+ assert.Equal(t, "runnable:root;node:composite_lambda", rootCause.Parent.Parent.Address.String())
+ assert.Equal(t, "composite interrupt from lambda", rootCause.Parent.Parent.Info)
+ assert.False(t, rootCause.Parent.Parent.IsRootCause)
+
+ // 7. Resume execution using the complete, fully-qualified ID
+ resumeCtx := ResumeWithData(context.Background(), rootCause.ID, &myResumeData{Message: "resume inner"})
+ finalOutput, err := compiledRootGraph.Invoke(resumeCtx, "top level input", WithCheckPointID(checkPointID))
+
+ // 8. Verify final result
+ assert.NoError(t, err)
+ assert.Equal(t, "inner lambda resumed successfully", finalOutput)
+}
+
+func TestLegacyInterrupt(t *testing.T) {
+ // this test case aims to test the behavior of the deprecated InterruptAndRerun,
+ // NewInterruptAndRerunErr within CompositeInterrupt.
+ // Define two sub-processes(functions), one interrupts with InterruptAndRerun,
+ // the other interrupts with NewInterruptAndRerunErr.
+ // create a lambda as a composite node, within the lambda invokes the two sub-processes.
+ // create the graph, add lambda node and invoke it.
+ // after verifying the interrupt points, just invokes again without explicit resume.
+ // verify the same interrupt IDs again.
+ // then finally Resume() the graph.
+
+ // 1. Define the sub-processes that use legacy and modern interrupts
+ subProcess1 := func(ctx context.Context) (string, error) {
+ isResume, _, data := GetResumeContext[string](ctx)
+ if isResume {
+ return data, nil
+ }
+ return "", deprecatedInterruptAndRerun
+ }
+ subProcess2 := func(ctx context.Context) (string, error) {
+ isResume, _, data := GetResumeContext[string](ctx)
+ if isResume {
+ return data, nil
+ }
+ return "", deprecatedInterruptAndRerunErr("legacy info")
+ }
+ subProcess3 := func(ctx context.Context) (string, error) {
+ isResume, _, data := GetResumeContext[string](ctx)
+ if isResume {
+ return data, nil
+ }
+ // Use the modern, addr-aware interrupt function
+ return "", Interrupt(ctx, "modern info")
+ }
+
+ // 2. Define the composite lambda
+ compositeLambda := InvokableLambda(func(ctx context.Context, input string) (string, error) {
+ // If the lambda itself is being resumed, it means the whole process is done.
+ isResume, _, data := GetResumeContext[string](ctx)
+
+ // Run sub-processes and collect their errors
+ var (
+ errs []error
+ outStr string
+ )
+
+ const PathStepCustom AddressSegmentType = "custom"
+ subCtx1 := AppendAddressSegment(ctx, PathStepCustom, "1")
+ out1, err1 := subProcess1(subCtx1)
+ if err1 != nil {
+ // Wrap the legacy error to give it a addr
+ wrappedErr := WrapInterruptAndRerunIfNeeded(ctx, AddressSegment{Type: PathStepCustom, ID: "1"}, err1)
+ errs = append(errs, wrappedErr)
+ } else {
+ outStr += out1
+ }
+ subCtx2 := AppendAddressSegment(ctx, PathStepCustom, "2")
+ out2, err2 := subProcess2(subCtx2)
+ if err2 != nil {
+ // Wrap the legacy error to give it a addr
+ wrappedErr := WrapInterruptAndRerunIfNeeded(ctx, AddressSegment{Type: PathStepCustom, ID: "2"}, err2)
+ errs = append(errs, wrappedErr)
+ } else {
+ outStr += out2
+ }
+ subCtx3 := AppendAddressSegment(ctx, PathStepCustom, "3")
+ out3, err3 := subProcess3(subCtx3)
+ if err3 != nil {
+ // The error from Interrupt() is already addr-aware. WrapInterruptAndRerunIfNeeded
+ // should handle this gracefully and return the error as-is.
+ wrappedErr := WrapInterruptAndRerunIfNeeded(ctx, AddressSegment{Type: PathStepCustom, ID: "3"}, err3)
+ errs = append(errs, wrappedErr)
+ } else {
+ outStr += out3
+ }
+
+ if len(errs) > 0 {
+ // Return a composite interrupt containing the wrapped legacy errors
+ return "", CompositeInterrupt(ctx, "legacy composite", nil, errs...)
+ }
+
+ if isResume {
+ outStr = outStr + " " + data
+ }
+
+ return outStr, nil
+ })
+
+ // 3. Create and compile the graph
+ rootGraph := NewGraph[string, string]()
+ _ = rootGraph.AddLambdaNode("legacy_composite", compositeLambda)
+ _ = rootGraph.AddEdge(START, "legacy_composite")
+ _ = rootGraph.AddEdge("legacy_composite", END)
+ compiledGraph, err := rootGraph.Compile(context.Background(), WithGraphName("root"), WithCheckPointStore(newInMemoryStore()))
+ assert.NoError(t, err)
+
+ // 4. First invocation - should interrupt
+ checkPointID := "legacy-interrupt-test"
+ _, err = compiledGraph.Invoke(context.Background(), "input", WithCheckPointID(checkPointID))
+
+ // 5. Verify the three interrupt points
+ assert.Error(t, err)
+ info, isInterrupt := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt)
+ assert.Len(t, info.InterruptContexts, 3) // Only the 3 root causes
+
+ found := make(map[string]any)
+ addrToID := make(map[string]string)
+ var parentCtx *InterruptCtx
+ for _, iCtx := range info.InterruptContexts {
+ addrStr := iCtx.Address.String()
+ found[addrStr] = iCtx.Info
+ addrToID[addrStr] = iCtx.ID
+ assert.True(t, iCtx.IsRootCause)
+ // Check parent
+ assert.NotNil(t, iCtx.Parent)
+ if parentCtx == nil {
+ parentCtx = iCtx.Parent
+ assert.Equal(t, "runnable:root;node:legacy_composite", parentCtx.Address.String())
+ assert.Equal(t, "legacy composite", parentCtx.Info)
+ assert.False(t, parentCtx.IsRootCause)
+ } else {
+ assert.Same(t, parentCtx, iCtx.Parent)
+ }
+ }
+ expectedID1 := "runnable:root;node:legacy_composite;custom:1"
+ expectedID2 := "runnable:root;node:legacy_composite;custom:2"
+ expectedID3 := "runnable:root;node:legacy_composite;custom:3"
+ assert.Contains(t, found, expectedID1)
+ assert.Nil(t, found[expectedID1]) // From InterruptAndRerun
+ assert.Contains(t, found, expectedID2)
+ assert.Equal(t, "legacy info", found[expectedID2]) // From NewInterruptAndRerunErr
+ assert.Contains(t, found, expectedID3)
+ assert.Equal(t, "modern info", found[expectedID3]) // From Interrupt
+
+ // 6. Second invocation (re-run without resume) - should yield the same interrupts
+ _, err = compiledGraph.Invoke(context.Background(), "input", WithCheckPointID(checkPointID))
+ assert.Error(t, err)
+ info2, isInterrupt2 := ExtractInterruptInfo(err)
+ assert.True(t, isInterrupt2)
+ assert.Len(t, info2.InterruptContexts, 3, "Should have the same number of interrupts on re-run")
+
+ // 7. Third invocation - Resume all three interrupt points with specific data
+ resumeData := map[string]any{
+ addrToID[expectedID1]: "output1",
+ addrToID[expectedID2]: "output2",
+ addrToID[expectedID3]: "output3",
+ }
+ resumeCtx := BatchResumeWithData(context.Background(), resumeData)
+ // TODO: The legacy interrupt wrapping does not currently work correctly with BatchResumeWithData.
+ // The graph re-interrupts instead of completing. This should be fixed in the core framework.
+ _, err = compiledGraph.Invoke(resumeCtx, "input", WithCheckPointID(checkPointID))
+ assert.Error(t, err)
+}
diff --git a/compose/tool_node.go b/compose/tool_node.go
index ff73d39d..6b506eb0 100644
--- a/compose/tool_node.go
+++ b/compose/tool_node.go
@@ -31,9 +31,8 @@ import (
)
type toolsNodeOptions struct {
- ToolOptions []tool.Option
- ToolList []tool.BaseTool
- executedTools map[string]string
+ ToolOptions []tool.Option
+ ToolList []tool.BaseTool
}
// ToolsNodeOption is the option func type for ToolsNode.
@@ -53,12 +52,6 @@ func WithToolList(tool ...tool.BaseTool) ToolsNodeOption {
}
}
-func withExecutedTools(executedTools map[string]string) ToolsNodeOption {
- return func(o *toolsNodeOptions) {
- o.executedTools = executedTools
- }
-}
-
// ToolsNode represents a node capable of executing tools within a graph.
// The Graph Node interface is defined as follows:
//
@@ -138,7 +131,14 @@ type ToolsInterruptAndRerunExtra struct {
}
func init() {
- schema.RegisterName[*ToolsInterruptAndRerunExtra]("_eino_compose_tools_interrupt_and_rerun_extra") // TODO: check if this is really needed when refactoring adk resume
+ schema.RegisterName[*ToolsInterruptAndRerunExtra]("_eino_compose_tools_interrupt_and_rerun_extra")
+ schema.RegisterName[*toolsInterruptAndRerunState]("_eino_compose_tools_interrupt_and_rerun_state")
+}
+
+type toolsInterruptAndRerunState struct {
+ Input *schema.Message
+ ExecutedTools map[string]string
+ RerunTools []string
}
type toolsTuple struct {
@@ -293,6 +293,7 @@ func runToolCallTaskByInvoke(ctx context.Context, task *toolCallTask, opts ...to
})
ctx = setToolCallInfo(ctx, &toolCallInfo{toolCallID: task.callID})
+ ctx = appendToolAddressSegment(ctx, task.name, task.callID)
task.output, task.err = task.r.Invoke(ctx, task.arg, opts...)
if task.err == nil {
task.executed = true
@@ -307,6 +308,7 @@ func runToolCallTaskByStream(ctx context.Context, task *toolCallTask, opts ...to
})
ctx = setToolCallInfo(ctx, &toolCallInfo{toolCallID: task.callID})
+ ctx = appendToolAddressSegment(ctx, task.name, task.callID)
task.sOutput, task.err = task.r.Stream(ctx, task.arg, opts...)
if task.err == nil {
task.executed = true
@@ -374,7 +376,15 @@ func (tn *ToolsNode) Invoke(ctx context.Context, input *schema.Message,
}
}
- tasks, err := tn.genToolCallTasks(ctx, tuple, input, opt.executedTools, false)
+ var executedTools map[string]string
+ if wasInterrupted, hasState, tnState := GetInterruptState[*toolsInterruptAndRerunState](ctx); wasInterrupted && hasState {
+ input = tnState.Input
+ if tnState.ExecutedTools != nil {
+ executedTools = tnState.ExecutedTools
+ }
+ }
+
+ tasks, err := tn.genToolCallTasks(ctx, tuple, input, executedTools, false)
if err != nil {
return nil, err
}
@@ -393,27 +403,40 @@ func (tn *ToolsNode) Invoke(ctx context.Context, input *schema.Message,
ExecutedTools: make(map[string]string),
RerunExtraMap: make(map[string]any),
}
- rerun := false
+ rerunState := &toolsInterruptAndRerunState{
+ Input: input,
+ ExecutedTools: make(map[string]string),
+ }
+
+ var errs []error
for i := 0; i < n; i++ {
if tasks[i].err != nil {
- extra, ok := IsInterruptRerunError(tasks[i].err)
+ info, ok := IsInterruptRerunError(tasks[i].err)
if !ok {
return nil, fmt.Errorf("failed to invoke tool[name:%s id:%s]: %w", tasks[i].name, tasks[i].callID, tasks[i].err)
}
- rerun = true
+
rerunExtra.RerunTools = append(rerunExtra.RerunTools, tasks[i].callID)
- rerunExtra.RerunExtraMap[tasks[i].callID] = extra
+ rerunState.RerunTools = append(rerunState.RerunTools, tasks[i].callID)
+ if info != nil {
+ rerunExtra.RerunExtraMap[tasks[i].callID] = info
+ }
+
+ iErr := WrapInterruptAndRerunIfNeeded(ctx,
+ AddressSegment{ID: tasks[i].callID, Type: AddressSegmentTool}, tasks[i].err)
+ errs = append(errs, iErr)
continue
}
if tasks[i].executed {
rerunExtra.ExecutedTools[tasks[i].callID] = tasks[i].output
+ rerunState.ExecutedTools[tasks[i].callID] = tasks[i].output
}
- if !rerun {
+ if len(errs) == 0 {
output[i] = schema.ToolMessage(tasks[i].output, tasks[i].callID, schema.WithToolName(tasks[i].name))
}
}
- if rerun {
- return nil, NewInterruptAndRerunErr(rerunExtra)
+ if len(errs) > 0 {
+ return nil, CompositeInterrupt(ctx, rerunExtra, rerunState, errs...)
}
return output, nil
@@ -434,7 +457,15 @@ func (tn *ToolsNode) Stream(ctx context.Context, input *schema.Message,
}
}
- tasks, err := tn.genToolCallTasks(ctx, tuple, input, opt.executedTools, true)
+ var executedTools map[string]string
+ if wasInterrupted, hasState, tnState := GetInterruptState[*toolsInterruptAndRerunState](ctx); wasInterrupted && hasState {
+ input = tnState.Input
+ if tnState.ExecutedTools != nil {
+ executedTools = tnState.ExecutedTools
+ }
+ }
+
+ tasks, err := tn.genToolCallTasks(ctx, tuple, input, executedTools, true)
if err != nil {
return nil, err
}
@@ -447,28 +478,37 @@ func (tn *ToolsNode) Stream(ctx context.Context, input *schema.Message,
n := len(tasks)
- rerun := false
rerunExtra := &ToolsInterruptAndRerunExtra{
ToolCalls: input.ToolCalls,
+ ExecutedTools: make(map[string]string),
RerunExtraMap: make(map[string]any),
+ }
+ rerunState := &toolsInterruptAndRerunState{
+ Input: input,
ExecutedTools: make(map[string]string),
}
-
+ var errs []error
// check rerun
for i := 0; i < n; i++ {
if tasks[i].err != nil {
- extra, ok := IsInterruptRerunError(tasks[i].err)
+ info, ok := IsInterruptRerunError(tasks[i].err)
if !ok {
return nil, fmt.Errorf("failed to stream tool call %s: %w", tasks[i].callID, tasks[i].err)
}
- rerun = true
+
rerunExtra.RerunTools = append(rerunExtra.RerunTools, tasks[i].callID)
- rerunExtra.RerunExtraMap[tasks[i].callID] = extra
+ rerunState.RerunTools = append(rerunState.RerunTools, tasks[i].callID)
+ if info != nil {
+ rerunExtra.RerunExtraMap[tasks[i].callID] = info
+ }
+ iErr := WrapInterruptAndRerunIfNeeded(ctx,
+ AddressSegment{ID: tasks[i].callID, Type: AddressSegmentTool}, tasks[i].err)
+ errs = append(errs, iErr)
continue
}
}
- if rerun {
+ if len(errs) > 0 {
// concat and save tool output
for _, t := range tasks {
if t.executed {
@@ -477,9 +517,10 @@ func (tn *ToolsNode) Stream(ctx context.Context, input *schema.Message,
return nil, fmt.Errorf("failed to concat tool[name:%s id:%s]'s stream output: %w", t.name, t.callID, err_)
}
rerunExtra.ExecutedTools[t.callID] = o
+ rerunState.ExecutedTools[t.callID] = o
}
}
- return nil, NewInterruptAndRerunErr(rerunExtra)
+ return nil, CompositeInterrupt(ctx, rerunExtra, rerunState, errs...)
}
// common return
diff --git a/compose/tool_node_test.go b/compose/tool_node_test.go
index fae31608..1621f235 100644
--- a/compose/tool_node_test.go
+++ b/compose/tool_node_test.go
@@ -791,9 +791,7 @@ func TestToolRerun(t *testing.T) {
Tools: []tool.BaseTool{&myTool1{}, &myTool2{}, &myTool3{t: t}, &myTool4{t: t}},
})
assert.NoError(t, err)
- assert.NoError(t, g.AddToolsNode("tool node", tn, WithStatePreHandler(func(ctx context.Context, in *schema.Message, state *myToolRerunState) (*schema.Message, error) {
- return state.In, nil
- })))
+ assert.NoError(t, g.AddToolsNode("tool node", tn))
assert.NoError(t, g.AddLambdaNode("lambda", InvokableLambda(func(ctx context.Context, input []*schema.Message) (output string, err error) {
contents := make([]string, len(input))
for _, m := range input {
@@ -849,7 +847,7 @@ func (m *myTool1) Info(ctx context.Context) (*schema.ToolInfo, error) {
func (m *myTool1) InvokableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (string, error) {
if m.times == 0 {
m.times++
- return "", NewInterruptAndRerunErr("tool1 rerun extra")
+ return "", Interrupt(ctx, "tool1 rerun extra")
}
return "tool1 input: " + argumentsInJSON, nil
}
@@ -865,7 +863,7 @@ func (m *myTool2) Info(ctx context.Context) (*schema.ToolInfo, error) {
func (m *myTool2) StreamableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (*schema.StreamReader[string], error) {
if m.times == 0 {
m.times++
- return nil, NewInterruptAndRerunErr("tool2 rerun extra")
+ return nil, Interrupt(ctx, "tool2 rerun extra")
}
return schema.StreamReaderFromArray([]string{"tool2 input: ", argumentsInJSON}), nil
}
@@ -880,7 +878,7 @@ func (m *myTool3) Info(ctx context.Context) (*schema.ToolInfo, error) {
}
func (m *myTool3) InvokableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (string, error) {
- assert.Equal(m.t, m.times, 0)
+ assert.Equal(m.t, 0, m.times)
m.times++
return "tool3 input: " + argumentsInJSON, nil
}
@@ -895,7 +893,7 @@ func (m *myTool4) Info(ctx context.Context) (*schema.ToolInfo, error) {
}
func (m *myTool4) StreamableRun(ctx context.Context, argumentsInJSON string, opts ...tool.Option) (*schema.StreamReader[string], error) {
- assert.Equal(m.t, m.times, 0)
+ assert.Equal(m.t, 0, m.times)
m.times++
return schema.StreamReaderFromArray([]string{"tool4 input: ", argumentsInJSON}), nil
}
diff --git a/internal/core/address.go b/internal/core/address.go
new file mode 100644
index 00000000..2c6f1b61
--- /dev/null
+++ b/internal/core/address.go
@@ -0,0 +1,323 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package core
+
+import (
+ "context"
+ "fmt"
+ "strings"
+ "sync"
+
+ "github.com/cloudwego/eino/internal/generic"
+)
+
+// AddressSegmentType defines the type of a segment in an execution address.
+type AddressSegmentType string
+
+// Address represents a full, hierarchical address to a point in the execution structure.
+type Address []AddressSegment
+
+// String converts an Address into its unique string representation.
+func (p Address) String() string {
+ if p == nil {
+ return ""
+ }
+ var sb strings.Builder
+ for i, s := range p {
+ sb.WriteString(string(s.Type))
+ sb.WriteString(":")
+ sb.WriteString(s.ID)
+ if s.SubID != "" {
+ sb.WriteString(":")
+ sb.WriteString(s.SubID)
+ }
+ if i != len(p)-1 {
+ sb.WriteString(";")
+ }
+ }
+ return sb.String()
+}
+
+func (p Address) Equals(other Address) bool {
+ if len(p) != len(other) {
+ return false
+ }
+ for i := range p {
+ if p[i].Type != other[i].Type || p[i].ID != other[i].ID || p[i].SubID != other[i].SubID {
+ return false
+ }
+ }
+ return true
+}
+
+// AddressSegment represents a single segment in the hierarchical address of an execution point.
+// A sequence of AddressSegments uniquely identifies a location within a potentially nested structure.
+type AddressSegment struct {
+ // ID is the unique identifier for this segment, e.g., the node's key or the tool's name.
+ ID string
+ // Type indicates whether this address segment is a graph node, a tool call, an agent, etc.
+ Type AddressSegmentType
+ // In some cases, ID alone are not unique enough, we need this SubID to guarantee uniqueness.
+ // e.g. parallel tool calls with the same name but different tool call IDs.
+ SubID string
+}
+
+type addrCtxKey struct{}
+
+type addrCtx struct {
+ addr Address
+ interruptState *InterruptState
+ isResumeTarget bool
+ resumeData any
+}
+
+type globalResumeInfoKey struct{}
+
+type globalResumeInfo struct {
+ mu sync.Mutex
+ id2ResumeData map[string]any
+ id2ResumeDataUsed map[string]bool
+ id2State map[string]InterruptState
+ id2StateUsed map[string]bool
+ id2Addr map[string]Address
+}
+
+// GetCurrentAddress returns the hierarchical address of the currently executing component.
+// The address is a sequence of segments, each identifying a structural part of the execution
+// like an agent, a graph node, or a tool call. This can be useful for logging or debugging.
+func GetCurrentAddress(ctx context.Context) Address {
+ if p, ok := ctx.Value(addrCtxKey{}).(*addrCtx); ok {
+ return p.addr
+ }
+
+ return nil
+}
+
+// AppendAddressSegment creates a new execution context for a sub-component (e.g., a graph node or a tool call).
+//
+// It extends the current context's address with a new segment and populates the new context with the
+// appropriate interrupt state and resume data for that specific sub-address.
+//
+// - ctx: The parent context, typically the one passed into the component's Invoke/Stream method.
+// - segType: The type of the new address segment (e.g., "node", "tool").
+// - segID: The unique ID for the new address segment.
+func AppendAddressSegment(ctx context.Context, segType AddressSegmentType, segID string,
+ subID string) context.Context {
+ // get current address
+ currentAddress := GetCurrentAddress(ctx)
+ if len(currentAddress) == 0 {
+ currentAddress = []AddressSegment{
+ {
+ Type: segType,
+ ID: segID,
+ SubID: subID,
+ },
+ }
+ } else {
+ newAddress := make([]AddressSegment, len(currentAddress)+1)
+ copy(newAddress, currentAddress)
+ newAddress[len(newAddress)-1] = AddressSegment{
+ Type: segType,
+ ID: segID,
+ SubID: subID,
+ }
+ currentAddress = newAddress
+ }
+
+ runCtx := &addrCtx{
+ addr: currentAddress,
+ }
+
+ rInfo, hasRInfo := getResumeInfo(ctx)
+ if !hasRInfo {
+ return context.WithValue(ctx, addrCtxKey{}, runCtx)
+ }
+
+ var id string
+ for id_, addr := range rInfo.id2Addr {
+ if addr.Equals(currentAddress) {
+ rInfo.mu.Lock()
+ if used, ok := rInfo.id2StateUsed[id_]; !ok || !used {
+ runCtx.interruptState = generic.PtrOf(rInfo.id2State[id_])
+ rInfo.id2StateUsed[id_] = true
+ id = id_
+ rInfo.mu.Unlock()
+ break
+ }
+ rInfo.mu.Unlock()
+ }
+ }
+
+ // take from globalResumeInfo the data for the new address if there is any
+ rInfo.mu.Lock()
+ defer rInfo.mu.Unlock()
+ used := rInfo.id2ResumeDataUsed[id]
+ if !used {
+ rData, existed := rInfo.id2ResumeData[id]
+ if existed {
+ rInfo.id2ResumeDataUsed[id] = true
+ runCtx.resumeData = rData
+ runCtx.isResumeTarget = true
+ }
+ }
+
+ return context.WithValue(ctx, addrCtxKey{}, runCtx)
+}
+
+// GetNextResumptionPoints finds the immediate child resumption points for a given parent address.
+func GetNextResumptionPoints(ctx context.Context) (map[string]bool, error) {
+ parentAddr := GetCurrentAddress(ctx)
+
+ rInfo, exists := getResumeInfo(ctx)
+ if !exists {
+ return nil, fmt.Errorf("GetNextResumptionPoints: failed to get resume info from context")
+ }
+
+ nextPoints := make(map[string]bool)
+ parentAddrLen := len(parentAddr)
+
+ for _, addr := range rInfo.id2Addr {
+ // Check if addr is a potential child (must be longer than parent)
+ if len(addr) <= parentAddrLen {
+ continue
+ }
+
+ // Check if it has the parent address as a prefix
+ var isPrefix bool
+ if parentAddrLen == 0 {
+ isPrefix = true
+ } else {
+ isPrefix = addr[:parentAddrLen].Equals(parentAddr)
+ }
+
+ if !isPrefix {
+ continue
+ }
+
+ // We are looking for immediate children.
+ // The address of an immediate child should be one segment longer.
+ childAddr := addr[parentAddrLen : parentAddrLen+1]
+ childID := childAddr[0].ID
+
+ // Avoid adding duplicates.
+ if _, ok := nextPoints[childID]; !ok {
+ nextPoints[childID] = true
+ }
+ }
+
+ return nextPoints, nil
+}
+
+// BatchResumeWithData is the core function for preparing a resume context. It injects a map
+// of resume targets and their corresponding data into the context.
+//
+// The `resumeData` map should contain the interrupt IDs (which are the string form of addresses) of the
+// components to be resumed as keys. The value can be the resume data for that component, or `nil`
+// if no data is needed (equivalent to using `Resume`).
+//
+// This function is the foundation for the "Explicit Targeted Resume" strategy. Components whose interrupt IDs
+// are present as keys in the map will receive `isResumeFlow = true` when they call `GetResumeContext`.
+func BatchResumeWithData(ctx context.Context, resumeData map[string]any) context.Context {
+ rInfo, ok := ctx.Value(globalResumeInfoKey{}).(*globalResumeInfo)
+ if !ok {
+ // Create a new globalResumeInfo and copy the map to prevent external mutation.
+ newMap := make(map[string]any, len(resumeData))
+ for k, v := range resumeData {
+ newMap[k] = v
+ }
+ return context.WithValue(ctx, globalResumeInfoKey{}, &globalResumeInfo{
+ id2ResumeData: newMap,
+ id2ResumeDataUsed: make(map[string]bool),
+ id2StateUsed: make(map[string]bool),
+ })
+ }
+
+ rInfo.mu.Lock()
+ defer rInfo.mu.Unlock()
+ if rInfo.id2ResumeData == nil {
+ rInfo.id2ResumeData = make(map[string]any)
+ }
+ for id, data := range resumeData {
+ rInfo.id2ResumeData[id] = data
+ }
+ return ctx
+}
+
+func PopulateInterruptState(ctx context.Context, id2Addr map[string]Address,
+ id2State map[string]InterruptState) context.Context {
+ rInfo, ok := ctx.Value(globalResumeInfoKey{}).(*globalResumeInfo)
+ if ok {
+ if rInfo.id2Addr == nil {
+ rInfo.id2Addr = make(map[string]Address)
+ }
+ for id, addr := range id2Addr {
+ rInfo.id2Addr[id] = addr
+ }
+ rInfo.id2State = id2State
+ } else {
+ rInfo = &globalResumeInfo{
+ id2Addr: id2Addr,
+ id2State: id2State,
+ id2StateUsed: make(map[string]bool),
+ id2ResumeDataUsed: make(map[string]bool),
+ }
+ ctx = context.WithValue(ctx, globalResumeInfoKey{}, rInfo)
+ }
+
+ runCtx, ok := getRunCtx(ctx)
+ if ok {
+ for id_, addr := range id2Addr {
+ if addr.Equals(runCtx.addr) {
+ if used, ok := rInfo.id2StateUsed[id_]; !ok || !used {
+ runCtx.interruptState = generic.PtrOf(rInfo.id2State[id_])
+ rInfo.mu.Lock()
+ rInfo.id2StateUsed[id_] = true
+ rInfo.mu.Unlock()
+ }
+
+ if used, ok := rInfo.id2ResumeDataUsed[id_]; !ok || !used {
+ runCtx.isResumeTarget = true
+ runCtx.resumeData = rInfo.id2ResumeData[id_]
+ rInfo.mu.Lock()
+ rInfo.id2ResumeDataUsed[id_] = true
+ rInfo.mu.Unlock()
+ }
+
+ break
+ }
+ }
+ }
+
+ return ctx
+}
+
+func getResumeInfo(ctx context.Context) (*globalResumeInfo, bool) {
+ info, ok := ctx.Value(globalResumeInfoKey{}).(*globalResumeInfo)
+ return info, ok
+}
+
+type InterruptInfo struct {
+ Info any
+ IsRootCause bool
+}
+
+func (i *InterruptInfo) String() string {
+ if i == nil {
+ return ""
+ }
+ return fmt.Sprintf("interrupt info: Info=%v, IsRootCause=%v", i.Info, i.IsRootCause)
+}
diff --git a/internal/core/interrupt.go b/internal/core/interrupt.go
new file mode 100644
index 00000000..e3503542
--- /dev/null
+++ b/internal/core/interrupt.go
@@ -0,0 +1,291 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package core
+
+import (
+ "context"
+ "fmt"
+ "reflect"
+
+ "github.com/google/uuid"
+)
+
+type CheckPointStore interface {
+ Get(ctx context.Context, checkPointID string) ([]byte, bool, error)
+ Set(ctx context.Context, checkPointID string, checkPoint []byte) error
+}
+
+type InterruptSignal struct {
+ ID string
+ Address
+ InterruptInfo
+ InterruptState
+ Subs []*InterruptSignal
+}
+
+func (is *InterruptSignal) Error() string {
+ return fmt.Sprintf("interrupt signal: ID=%s, Addr=%s, Info=%s, State=%s, SubsLen=%d",
+ is.ID, is.Address.String(), is.InterruptInfo.String(), is.InterruptState.String(), len(is.Subs))
+}
+
+type InterruptState struct {
+ State any
+ LayerSpecificPayload any
+}
+
+func (is *InterruptState) String() string {
+ if is == nil {
+ return ""
+ }
+ return fmt.Sprintf("interrupt state: State=%v, LayerSpecificPayload=%v", is.State, is.LayerSpecificPayload)
+}
+
+// InterruptConfig holds optional parameters for creating an interrupt.
+type InterruptConfig struct {
+ LayerPayload any
+}
+
+// InterruptOption is a function that configures an InterruptConfig.
+type InterruptOption func(*InterruptConfig)
+
+// WithLayerPayload creates an option to attach layer-specific metadata
+// to the interrupt's state.
+func WithLayerPayload(payload any) InterruptOption {
+ return func(c *InterruptConfig) {
+ c.LayerPayload = payload
+ }
+}
+
+func Interrupt(ctx context.Context, info any, state any, subContexts []*InterruptSignal, opts ...InterruptOption) (
+ *InterruptSignal, error) {
+ addr := GetCurrentAddress(ctx)
+
+ // Apply options to get config
+ config := &InterruptConfig{}
+ for _, opt := range opts {
+ opt(config)
+ }
+
+ myPoint := InterruptInfo{
+ Info: info,
+ }
+
+ if len(subContexts) == 0 {
+ myPoint.IsRootCause = true
+ return &InterruptSignal{
+ ID: uuid.NewString(),
+ Address: addr,
+ InterruptInfo: myPoint,
+ InterruptState: InterruptState{
+ State: state,
+ LayerSpecificPayload: config.LayerPayload,
+ },
+ }, nil
+ }
+
+ return &InterruptSignal{
+ ID: uuid.NewString(),
+ Address: addr,
+ InterruptInfo: myPoint,
+ InterruptState: InterruptState{
+ State: state,
+ LayerSpecificPayload: config.LayerPayload,
+ },
+ Subs: subContexts,
+ }, nil
+}
+
+// InterruptCtx provides a complete, user-facing context for a single, resumable interrupt point.
+type InterruptCtx struct {
+ // ID is the unique, fully-qualified address of the interrupt point.
+ // It is constructed by joining the individual Address segments, e.g., "agent:A;node:graph_a;tool:tool_call_123".
+ // This ID should be used when providing resume data via ResumeWithData.
+ ID string
+ // Address is the structured sequence of AddressSegment segments that leads to the interrupt point.
+ Address Address
+ // Info is the user-facing information associated with the interrupt, provided by the component that triggered it.
+ Info any
+ // IsRootCause indicates whether the interrupt point is the exact root cause for an interruption.
+ IsRootCause bool
+ // Parent points to the context of the parent component in the interrupt chain.
+ // It is nil for the top-level interrupt.
+ Parent *InterruptCtx
+}
+
+func (ic *InterruptCtx) EqualsWithoutID(other *InterruptCtx) bool {
+ if ic == nil && other == nil {
+ return true
+ }
+
+ if ic == nil || other == nil {
+ return false
+ }
+
+ if !ic.Address.Equals(other.Address) {
+ return false
+ }
+
+ if ic.IsRootCause != other.IsRootCause {
+ return false
+ }
+
+ if ic.Info != nil || other.Info != nil {
+ if ic.Info == nil || other.Info == nil {
+ return false
+ }
+
+ if !reflect.DeepEqual(ic.Info, other.Info) {
+ return false
+ }
+ }
+
+ if ic.Parent != nil || other.Parent != nil {
+ if ic.Parent == nil || other.Parent == nil {
+ return false
+ }
+
+ if !ic.Parent.EqualsWithoutID(other.Parent) {
+ return false
+ }
+ }
+
+ return true
+}
+
+// FromInterruptContexts converts a list of user-facing InterruptCtx objects into an
+// internal InterruptSignal tree. It correctly handles common ancestors and ensures
+// that the resulting tree is consistent with the original interrupt chain.
+//
+// This method is primarily used by components that bridge different execution environments.
+// For example, an `adk.AgentTool` might catch an `adk.InterruptInfo`, extract the
+// `adk.InterruptCtx` objects from it, and then call this method on each one. The resulting
+// error signals are then typically aggregated into a single error using `compose.CompositeInterrupt`
+// to be returned from the tool's `InvokableRun` method.
+// FromInterruptContexts reconstructs a single InterruptSignal tree from a list of
+// user-facing InterruptCtx objects. It correctly merges common ancestors.
+func FromInterruptContexts(contexts []*InterruptCtx) *InterruptSignal {
+ if len(contexts) == 0 {
+ return nil
+ }
+
+ signalMap := make(map[string]*InterruptSignal)
+ var rootSignal *InterruptSignal
+
+ // getOrCreateSignal is a recursive helper that builds the tree bottom-up.
+ var getOrCreateSignal func(*InterruptCtx) *InterruptSignal
+ getOrCreateSignal = func(ctx *InterruptCtx) *InterruptSignal {
+ if ctx == nil {
+ return nil
+ }
+ // If we've already created a signal for this context, return it.
+ if signal, exists := signalMap[ctx.ID]; exists {
+ return signal
+ }
+
+ // Create the signal for the current context.
+ newSignal := &InterruptSignal{
+ ID: ctx.ID,
+ Address: ctx.Address,
+ InterruptInfo: InterruptInfo{
+ Info: ctx.Info,
+ IsRootCause: ctx.IsRootCause,
+ },
+ }
+ signalMap[ctx.ID] = newSignal // Cache it immediately.
+
+ // Recursively ensure the parent exists. If it doesn't, this is the root.
+ if parentSignal := getOrCreateSignal(ctx.Parent); parentSignal != nil {
+ parentSignal.Subs = append(parentSignal.Subs, newSignal)
+ } else {
+ rootSignal = newSignal
+ }
+ return newSignal
+ }
+
+ // Process all contexts to ensure all branches of the tree are built.
+ for _, ctx := range contexts {
+ _ = getOrCreateSignal(ctx)
+ }
+
+ return rootSignal
+}
+
+// ToInterruptContexts converts the internal InterruptSignal tree into a list of
+// user-facing InterruptCtx objects for the root causes of the interruption.
+// Each returned context has its Parent field populated (if it has a parent),
+// allowing traversal up the interrupt chain.
+func ToInterruptContexts(is *InterruptSignal, addrModifier func(Address) Address) []*InterruptCtx {
+ if is == nil {
+ return nil
+ }
+ var rootCauseContexts []*InterruptCtx
+
+ // A recursive helper that traverses the signal tree, building the parent-linked
+ // context objects and appending only the root causes to the final list.
+ var buildContexts func(*InterruptSignal, *InterruptCtx)
+ buildContexts = func(signal *InterruptSignal, parentCtx *InterruptCtx) {
+ currentCtx := &InterruptCtx{
+ ID: signal.ID,
+ Address: signal.Address,
+ Info: signal.InterruptInfo.Info,
+ IsRootCause: signal.InterruptInfo.IsRootCause,
+ Parent: parentCtx,
+ }
+
+ if addrModifier != nil {
+ currentCtx.Address = addrModifier(currentCtx.Address)
+ }
+
+ // Only add the context to the final list if it's a root cause.
+ if currentCtx.IsRootCause {
+ rootCauseContexts = append(rootCauseContexts, currentCtx)
+ }
+
+ // Recurse into children, passing the newly created context as their parent.
+ for _, subSignal := range signal.Subs {
+ buildContexts(subSignal, currentCtx)
+ }
+ }
+
+ buildContexts(is, nil)
+ return rootCauseContexts
+}
+
+// SignalToPersistenceMaps flattens an InterruptSignal tree into two maps suitable for persistence in a checkpoint.
+func SignalToPersistenceMaps(is *InterruptSignal) (map[string]Address, map[string]InterruptState) {
+ id2addr := make(map[string]Address)
+ id2state := make(map[string]InterruptState)
+
+ if is == nil {
+ return id2addr, id2state
+ }
+
+ var traverse func(*InterruptSignal)
+ traverse = func(signal *InterruptSignal) {
+ // Add current signal's data to the maps.
+ id2addr[signal.ID] = signal.Address
+ id2state[signal.ID] = signal.InterruptState // The embedded struct
+
+ // Recurse into children.
+ for _, sub := range signal.Subs {
+ traverse(sub)
+ }
+ }
+
+ traverse(is)
+ return id2addr, id2state
+}
diff --git a/internal/core/interrupt_test.go b/internal/core/interrupt_test.go
new file mode 100644
index 00000000..86d11497
--- /dev/null
+++ b/internal/core/interrupt_test.go
@@ -0,0 +1,1128 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package core
+
+import (
+ "context"
+ "testing"
+
+ "github.com/stretchr/testify/assert"
+)
+
+// Define AddressSegmentType constants locally to avoid dependency cycles
+const (
+ AddressSegmentAgent AddressSegmentType = "agent"
+ AddressSegmentTool AddressSegmentType = "tool"
+ AddressSegmentNode AddressSegmentType = "node"
+)
+
+func TestInterruptConversion(t *testing.T) {
+ // Test Case 1: Simple Chain (A -> B -> C)
+ t.Run("SimpleChain", func(t *testing.T) {
+ // Manually construct the user-facing contexts with parent pointers
+ ctxA := &InterruptCtx{ID: "A", IsRootCause: false}
+ ctxB := &InterruptCtx{ID: "B", Parent: ctxA, IsRootCause: false}
+ ctxC := &InterruptCtx{ID: "C", Parent: ctxB, IsRootCause: true}
+
+ // The input to FromInterruptContexts is just the root cause leaf node
+ contexts := []*InterruptCtx{ctxC}
+
+ // Convert from user-facing contexts to internal signal tree
+ signal := FromInterruptContexts(contexts)
+
+ // Assertions for the signal tree structure
+ assert.NotNil(t, signal)
+ assert.Equal(t, "A", signal.ID)
+ assert.Len(t, signal.Subs, 1)
+ assert.Equal(t, "B", signal.Subs[0].ID)
+ assert.Len(t, signal.Subs[0].Subs, 1)
+ assert.Equal(t, "C", signal.Subs[0].Subs[0].ID)
+ assert.True(t, signal.Subs[0].Subs[0].IsRootCause)
+
+ // Convert back from the signal tree to user-facing contexts
+ finalContexts := ToInterruptContexts(signal, nil)
+
+ // Assertions for the final list of contexts
+ assert.Len(t, finalContexts, 1)
+ finalC := finalContexts[0]
+ assert.Equal(t, "C", finalC.ID)
+ assert.True(t, finalC.IsRootCause)
+ assert.NotNil(t, finalC.Parent)
+ assert.Equal(t, "B", finalC.Parent.ID)
+ assert.NotNil(t, finalC.Parent.Parent)
+ assert.Equal(t, "A", finalC.Parent.Parent.ID)
+ assert.Nil(t, finalC.Parent.Parent.Parent)
+ })
+
+ // Test Case 2: Multiple Root Causes with Shared Parent (B -> D, C -> D)
+ t.Run("MultipleRootsSharedParent", func(t *testing.T) {
+ // Manually construct the contexts
+ ctxD := &InterruptCtx{ID: "D", IsRootCause: false}
+ ctxB := &InterruptCtx{ID: "B", Parent: ctxD, IsRootCause: true}
+ ctxC := &InterruptCtx{ID: "C", Parent: ctxD, IsRootCause: true}
+
+ // The input contains both root cause leaves
+ contexts := []*InterruptCtx{ctxB, ctxC}
+
+ // Convert to signal tree
+ signal := FromInterruptContexts(contexts)
+
+ // Assertions for the signal tree structure (should merge at D)
+ assert.NotNil(t, signal)
+ assert.Equal(t, "D", signal.ID)
+ assert.Len(t, signal.Subs, 2)
+ // Order of subs is not guaranteed, so we check for presence
+ subIDs := []string{signal.Subs[0].ID, signal.Subs[1].ID}
+ assert.Contains(t, subIDs, "B")
+ assert.Contains(t, subIDs, "C")
+
+ // Convert back to user-facing contexts
+ finalContexts := ToInterruptContexts(signal, nil)
+
+ // Assertions for the final list of contexts
+ assert.Len(t, finalContexts, 2)
+ finalIDs := []string{finalContexts[0].ID, finalContexts[1].ID}
+ assert.Contains(t, finalIDs, "B")
+ assert.Contains(t, finalIDs, "C")
+
+ // Check parent linking for one of the branches
+ var finalB *InterruptCtx
+ if finalContexts[0].ID == "B" {
+ finalB = finalContexts[0]
+ } else {
+ finalB = finalContexts[1]
+ }
+ assert.NotNil(t, finalB.Parent)
+ assert.Equal(t, "D", finalB.Parent.ID)
+ assert.Nil(t, finalB.Parent.Parent)
+ })
+
+ // Test Case 3: Nil and Empty Inputs
+ t.Run("NilAndEmpty", func(t *testing.T) {
+ assert.Nil(t, FromInterruptContexts(nil))
+ assert.Nil(t, FromInterruptContexts([]*InterruptCtx{}))
+ assert.Nil(t, ToInterruptContexts(nil, nil))
+ })
+}
+
+func TestSignalToPersistenceMaps(t *testing.T) {
+ // Test Case 1: Nil Signal
+ t.Run("NilSignal", func(t *testing.T) {
+ id2addr, id2state := SignalToPersistenceMaps(nil)
+ assert.NotNil(t, id2addr)
+ assert.NotNil(t, id2state)
+ assert.Empty(t, id2addr)
+ assert.Empty(t, id2state)
+ })
+
+ // Test Case 2: Single Node Signal
+ t.Run("SingleNode", func(t *testing.T) {
+ signal := &InterruptSignal{
+ ID: "node1",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ },
+ InterruptState: InterruptState{
+ State: "test state",
+ LayerSpecificPayload: "test payload",
+ },
+ }
+
+ id2addr, id2state := SignalToPersistenceMaps(signal)
+
+ assert.Len(t, id2addr, 1)
+ assert.Len(t, id2state, 1)
+
+ assert.Equal(t, signal.Address, id2addr["node1"])
+ assert.Equal(t, signal.InterruptState, id2state["node1"])
+ })
+
+ // Test Case 3: Simple Tree Structure
+ t.Run("SimpleTree", func(t *testing.T) {
+ child1 := &InterruptSignal{
+ ID: "child1",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ },
+ InterruptState: InterruptState{
+ State: "child1 state",
+ },
+ }
+
+ child2 := &InterruptSignal{
+ ID: "child2",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool2"},
+ },
+ InterruptState: InterruptState{
+ State: "child2 state",
+ },
+ }
+
+ parent := &InterruptSignal{
+ ID: "parent",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ },
+ InterruptState: InterruptState{
+ State: "parent state",
+ },
+ Subs: []*InterruptSignal{child1, child2},
+ }
+
+ id2addr, id2state := SignalToPersistenceMaps(parent)
+
+ // Should contain all 3 nodes
+ assert.Len(t, id2addr, 3)
+ assert.Len(t, id2state, 3)
+
+ // Check parent node
+ assert.Equal(t, parent.Address, id2addr["parent"])
+ assert.Equal(t, parent.InterruptState, id2state["parent"])
+
+ // Check child nodes
+ assert.Equal(t, child1.Address, id2addr["child1"])
+ assert.Equal(t, child1.InterruptState, id2state["child1"])
+ assert.Equal(t, child2.Address, id2addr["child2"])
+ assert.Equal(t, child2.InterruptState, id2state["child2"])
+ })
+
+ // Test Case 4: Deeply Nested Tree
+ t.Run("DeeplyNestedTree", func(t *testing.T) {
+ leaf1 := &InterruptSignal{
+ ID: "leaf1",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ {Type: AddressSegmentNode, ID: "node1"},
+ },
+ InterruptState: InterruptState{
+ State: "leaf1 state",
+ },
+ }
+
+ leaf2 := &InterruptSignal{
+ ID: "leaf2",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ {Type: AddressSegmentNode, ID: "node2"},
+ },
+ InterruptState: InterruptState{
+ State: "leaf2 state",
+ },
+ }
+
+ middle := &InterruptSignal{
+ ID: "middle",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ },
+ InterruptState: InterruptState{
+ State: "middle state",
+ },
+ Subs: []*InterruptSignal{leaf1, leaf2},
+ }
+
+ root := &InterruptSignal{
+ ID: "root",
+ Address: Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ },
+ InterruptState: InterruptState{
+ State: "root state",
+ },
+ Subs: []*InterruptSignal{middle},
+ }
+
+ id2addr, id2state := SignalToPersistenceMaps(root)
+
+ // Should contain all 4 nodes
+ assert.Len(t, id2addr, 4)
+ assert.Len(t, id2state, 4)
+
+ // Verify all nodes are present
+ assert.Equal(t, root.Address, id2addr["root"])
+ assert.Equal(t, root.InterruptState, id2state["root"])
+ assert.Equal(t, middle.Address, id2addr["middle"])
+ assert.Equal(t, middle.InterruptState, id2state["middle"])
+ assert.Equal(t, leaf1.Address, id2addr["leaf1"])
+ assert.Equal(t, leaf1.InterruptState, id2state["leaf1"])
+ assert.Equal(t, leaf2.Address, id2addr["leaf2"])
+ assert.Equal(t, leaf2.InterruptState, id2state["leaf2"])
+ })
+
+ // Test Case 5: Complex Tree with Multiple Branches
+ t.Run("ComplexTree", func(t *testing.T) {
+ // Create a complex tree structure with multiple branches
+ branch1Leaf1 := &InterruptSignal{ID: "b1l1", Address: Address{{Type: AddressSegmentAgent, ID: "a1"}}, InterruptState: InterruptState{State: "b1l1"}}
+ branch1Leaf2 := &InterruptSignal{ID: "b1l2", Address: Address{{Type: AddressSegmentAgent, ID: "a1"}}, InterruptState: InterruptState{State: "b1l2"}}
+ branch1 := &InterruptSignal{ID: "b1", Address: Address{{Type: AddressSegmentAgent, ID: "a1"}}, InterruptState: InterruptState{State: "b1"}, Subs: []*InterruptSignal{branch1Leaf1, branch1Leaf2}}
+
+ branch2Leaf1 := &InterruptSignal{ID: "b2l1", Address: Address{{Type: AddressSegmentAgent, ID: "a1"}}, InterruptState: InterruptState{State: "b2l1"}}
+ branch2 := &InterruptSignal{ID: "b2", Address: Address{{Type: AddressSegmentAgent, ID: "a1"}}, InterruptState: InterruptState{State: "b2"}, Subs: []*InterruptSignal{branch2Leaf1}}
+
+ root := &InterruptSignal{ID: "root", Address: Address{{Type: AddressSegmentAgent, ID: "a1"}}, InterruptState: InterruptState{State: "root"}, Subs: []*InterruptSignal{branch1, branch2}}
+
+ id2addr, id2state := SignalToPersistenceMaps(root)
+
+ // Should contain all 6 nodes
+ assert.Len(t, id2addr, 6)
+ assert.Len(t, id2state, 6)
+
+ // Verify all nodes are present
+ expectedNodes := []string{"root", "b1", "b2", "b1l1", "b1l2", "b2l1"}
+ for _, nodeID := range expectedNodes {
+ assert.Contains(t, id2addr, nodeID)
+ assert.Contains(t, id2state, nodeID)
+ }
+ })
+
+ // Test Case 6: Empty InterruptState Values
+ t.Run("EmptyInterruptState", func(t *testing.T) {
+ signal := &InterruptSignal{
+ ID: "node1",
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ InterruptState: InterruptState{
+ // Empty state values
+ },
+ }
+
+ id2addr, id2state := SignalToPersistenceMaps(signal)
+
+ assert.Len(t, id2addr, 1)
+ assert.Len(t, id2state, 1)
+ assert.Equal(t, signal.Address, id2addr["node1"])
+ assert.Equal(t, signal.InterruptState, id2state["node1"])
+ })
+}
+
+func TestGetCurrentAddress(t *testing.T) {
+ // Test Case 1: No Address in Context
+ t.Run("NoAddressInContext", func(t *testing.T) {
+ ctx := context.Background()
+ addr := GetCurrentAddress(ctx)
+ assert.Nil(t, addr)
+ })
+
+ // Test Case 2: Address in Context
+ t.Run("AddressInContext", func(t *testing.T) {
+ ctx := context.Background()
+ expectedAddr := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ }
+
+ // Create a context with address using internal addrCtx
+ runCtx := &addrCtx{
+ addr: expectedAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ addr := GetCurrentAddress(ctx)
+ assert.Equal(t, expectedAddr, addr)
+ })
+}
+
+func TestGetNextResumptionPoints(t *testing.T) {
+ // Test Case 1: No Resume Info in Context
+ t.Run("NoResumeInfo", func(t *testing.T) {
+ ctx := context.Background()
+ _, err := GetNextResumptionPoints(ctx)
+ assert.Error(t, err)
+ assert.Contains(t, err.Error(), "failed to get resume info")
+ })
+
+ // Test Case 2: Empty Resume Info
+ t.Run("EmptyResumeInfo", func(t *testing.T) {
+ ctx := context.Background()
+ rInfo := &globalResumeInfo{
+ id2Addr: make(map[string]Address),
+ }
+ ctx = context.WithValue(ctx, globalResumeInfoKey{}, rInfo)
+
+ points, err := GetNextResumptionPoints(ctx)
+ assert.NoError(t, err)
+ assert.Empty(t, points)
+ })
+
+ // Test Case 3: Valid Resume Points
+ t.Run("ValidResumePoints", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Set up current address
+ currentAddr := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ }
+ runCtx := &addrCtx{
+ addr: currentAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ // Set up resume info with child addresses
+ rInfo := &globalResumeInfo{
+ id2Addr: map[string]Address{
+ "child1": {
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ },
+ "child2": {
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool2"},
+ },
+ "unrelated": {
+ {Type: AddressSegmentAgent, ID: "agent2"},
+ },
+ },
+ }
+ ctx = context.WithValue(ctx, globalResumeInfoKey{}, rInfo)
+
+ points, err := GetNextResumptionPoints(ctx)
+ assert.NoError(t, err)
+ assert.Len(t, points, 2)
+ assert.True(t, points["tool1"])
+ assert.True(t, points["tool2"])
+ })
+
+ // Test Case 4: Root Address (Empty Parent)
+ t.Run("RootAddress", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Empty current address (root)
+ runCtx := &addrCtx{
+ addr: Address{},
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ // Set up resume info with various addresses
+ rInfo := &globalResumeInfo{
+ id2Addr: map[string]Address{
+ "agent1": {
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ },
+ "agent2": {
+ {Type: AddressSegmentAgent, ID: "agent2"},
+ },
+ },
+ }
+ ctx = context.WithValue(ctx, globalResumeInfoKey{}, rInfo)
+
+ points, err := GetNextResumptionPoints(ctx)
+ assert.NoError(t, err)
+ assert.Len(t, points, 2)
+ assert.True(t, points["agent1"])
+ assert.True(t, points["agent2"])
+ })
+}
+
+func TestBatchResumeWithData(t *testing.T) {
+ // Test Case 1: New Resume Data
+ t.Run("NewResumeData", func(t *testing.T) {
+ ctx := context.Background()
+ resumeData := map[string]any{
+ "id1": "data1",
+ "id2": "data2",
+ }
+
+ newCtx := BatchResumeWithData(ctx, resumeData)
+
+ // Verify the data was set correctly
+ rInfo, ok := newCtx.Value(globalResumeInfoKey{}).(*globalResumeInfo)
+ assert.True(t, ok)
+ assert.NotNil(t, rInfo)
+ assert.Equal(t, "data1", rInfo.id2ResumeData["id1"])
+ assert.Equal(t, "data2", rInfo.id2ResumeData["id2"])
+ })
+
+ // Test Case 2: Merge with Existing Resume Data
+ t.Run("MergeWithExisting", func(t *testing.T) {
+ ctx := context.Background()
+
+ // First call with initial data
+ initialData := map[string]any{
+ "id1": "initial",
+ }
+ ctx = BatchResumeWithData(ctx, initialData)
+
+ // Second call with additional data
+ additionalData := map[string]any{
+ "id2": "additional",
+ }
+ newCtx := BatchResumeWithData(ctx, additionalData)
+
+ // Verify both data sets are present
+ rInfo, ok := newCtx.Value(globalResumeInfoKey{}).(*globalResumeInfo)
+ assert.True(t, ok)
+ assert.NotNil(t, rInfo)
+ assert.Equal(t, "initial", rInfo.id2ResumeData["id1"])
+ assert.Equal(t, "additional", rInfo.id2ResumeData["id2"])
+ })
+
+ // Test Case 3: Empty Resume Data
+ t.Run("EmptyResumeData", func(t *testing.T) {
+ ctx := context.Background()
+ newCtx := BatchResumeWithData(ctx, map[string]any{})
+
+ rInfo, ok := newCtx.Value(globalResumeInfoKey{}).(*globalResumeInfo)
+ assert.True(t, ok)
+ assert.NotNil(t, rInfo)
+ assert.Empty(t, rInfo.id2ResumeData)
+ })
+}
+
+func TestGetInterruptState(t *testing.T) {
+ // Test Case 1: No Interrupt State
+ t.Run("NoInterruptState", func(t *testing.T) {
+ ctx := context.Background()
+ wasInterrupted, hasState, state := GetInterruptState[string](ctx)
+ assert.False(t, wasInterrupted)
+ assert.False(t, hasState)
+ assert.Equal(t, "", state)
+ })
+
+ // Test Case 2: With Interrupt State
+ t.Run("WithInterruptState", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with interrupt state
+ runCtx := &addrCtx{
+ interruptState: &InterruptState{
+ State: "test state",
+ },
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ wasInterrupted, hasState, state := GetInterruptState[string](ctx)
+ assert.True(t, wasInterrupted)
+ assert.True(t, hasState)
+ assert.Equal(t, "test state", state)
+ })
+
+ // Test Case 3: Wrong Type for Interrupt State
+ t.Run("WrongType", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with interrupt state of wrong type
+ runCtx := &addrCtx{
+ interruptState: &InterruptState{
+ State: 123, // int instead of string
+ },
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ wasInterrupted, hasState, state := GetInterruptState[string](ctx)
+ assert.True(t, wasInterrupted)
+ assert.False(t, hasState) // Should be false due to type mismatch
+ assert.Equal(t, "", state)
+ })
+
+ // Test Case 4: Nil Interrupt State
+ t.Run("NilInterruptState", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with nil interrupt state
+ runCtx := &addrCtx{
+ interruptState: nil,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ wasInterrupted, hasState, state := GetInterruptState[string](ctx)
+ assert.False(t, wasInterrupted) // Should be false because interruptState is nil
+ assert.False(t, hasState) // Should be false because state is nil
+ assert.Equal(t, "", state)
+ })
+}
+
+func TestGetResumeContext(t *testing.T) {
+ // Test Case 1: Not Resume Target
+ t.Run("NotResumeTarget", func(t *testing.T) {
+ ctx := context.Background()
+ isResumeTarget, hasData, data := GetResumeContext[string](ctx)
+ assert.False(t, isResumeTarget)
+ assert.False(t, hasData)
+ assert.Equal(t, "", data)
+ })
+
+ // Test Case 2: Resume Target with Data
+ t.Run("ResumeTargetWithData", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context as resume target with data
+ runCtx := &addrCtx{
+ isResumeTarget: true,
+ resumeData: "resume data",
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ isResumeTarget, hasData, data := GetResumeContext[string](ctx)
+ assert.True(t, isResumeTarget)
+ assert.True(t, hasData)
+ assert.Equal(t, "resume data", data)
+ })
+
+ // Test Case 3: Resume Target without Data
+ t.Run("ResumeTargetWithoutData", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context as resume target without data
+ runCtx := &addrCtx{
+ isResumeTarget: true,
+ resumeData: nil,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ isResumeTarget, hasData, data := GetResumeContext[string](ctx)
+ assert.True(t, isResumeTarget)
+ assert.False(t, hasData)
+ assert.Equal(t, "", data)
+ })
+
+ // Test Case 4: Wrong Type for Resume Data
+ t.Run("WrongType", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with resume data of wrong type
+ runCtx := &addrCtx{
+ isResumeTarget: true,
+ resumeData: 123, // int instead of string
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ isResumeTarget, hasData, data := GetResumeContext[string](ctx)
+ assert.True(t, isResumeTarget)
+ assert.False(t, hasData) // Should be false due to type mismatch
+ assert.Equal(t, "", data)
+ })
+}
+
+func TestWithLayerPayload(t *testing.T) {
+ // Test Case 1: Basic Usage
+ t.Run("BasicUsage", func(t *testing.T) {
+ config := &InterruptConfig{}
+ opt := WithLayerPayload("test payload")
+ opt(config)
+ assert.Equal(t, "test payload", config.LayerPayload)
+ })
+
+ // Test Case 2: Nil Payload
+ t.Run("NilPayload", func(t *testing.T) {
+ config := &InterruptConfig{LayerPayload: "existing"}
+ opt := WithLayerPayload(nil)
+ opt(config)
+ assert.Nil(t, config.LayerPayload)
+ })
+
+ // Test Case 3: Complex Payload
+ t.Run("ComplexPayload", func(t *testing.T) {
+ config := &InterruptConfig{}
+ payload := map[string]any{
+ "key1": "value1",
+ "key2": 123,
+ }
+ opt := WithLayerPayload(payload)
+ opt(config)
+ assert.Equal(t, payload, config.LayerPayload)
+ })
+}
+
+func TestInterruptFunction(t *testing.T) {
+ // Test Case 1: Simple Interrupt without SubContexts
+ t.Run("SimpleInterrupt", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a mock address
+ expectedAddr := Address{{Type: AddressSegmentAgent, ID: "test-agent"}}
+ runCtx := &addrCtx{
+ addr: expectedAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ info := "test info"
+ state := "test state"
+
+ signal, err := Interrupt(ctx, info, state, nil)
+ assert.NoError(t, err)
+ assert.NotNil(t, signal)
+ assert.NotEmpty(t, signal.ID)
+ assert.Equal(t, info, signal.Info)
+ assert.Equal(t, state, signal.State)
+ assert.True(t, signal.IsRootCause)
+ assert.Equal(t, expectedAddr, signal.Address)
+ })
+
+ // Test Case 2: Interrupt with SubContexts
+ t.Run("InterruptWithSubContexts", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a mock address
+ expectedAddr := Address{{Type: AddressSegmentAgent, ID: "parent-agent"}}
+ runCtx := &addrCtx{
+ addr: expectedAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ // Create sub contexts
+ subContexts := []*InterruptSignal{
+ {
+ ID: "child1",
+ Address: Address{{Type: AddressSegmentAgent, ID: "child1"}},
+ },
+ {
+ ID: "child2",
+ Address: Address{{Type: AddressSegmentAgent, ID: "child2"}},
+ },
+ }
+
+ info := "parent info"
+ state := "parent state"
+
+ signal, err := Interrupt(ctx, info, state, subContexts)
+ assert.NoError(t, err)
+ assert.NotNil(t, signal)
+ assert.NotEmpty(t, signal.ID)
+ assert.Equal(t, info, signal.Info)
+ assert.Equal(t, state, signal.State)
+ assert.False(t, signal.IsRootCause) // Should be false when there are sub contexts
+ assert.Len(t, signal.Subs, 2)
+ assert.Equal(t, "child1", signal.Subs[0].ID)
+ assert.Equal(t, "child2", signal.Subs[1].ID)
+ })
+
+ // Test Case 3: Interrupt with Options
+ t.Run("InterruptWithOptions", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a mock address
+ expectedAddr := Address{{Type: AddressSegmentAgent, ID: "test-agent"}}
+ runCtx := &addrCtx{
+ addr: expectedAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ info := "test info"
+ state := "test state"
+ layerPayload := "layer payload"
+
+ signal, err := Interrupt(ctx, info, state, nil, WithLayerPayload(layerPayload))
+ assert.NoError(t, err)
+ assert.NotNil(t, signal)
+ assert.Equal(t, layerPayload, signal.LayerSpecificPayload)
+ })
+
+ // Test Case 4: Empty SubContexts
+ t.Run("EmptySubContexts", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Create a context with a mock address
+ expectedAddr := Address{{Type: AddressSegmentAgent, ID: "test-agent"}}
+ runCtx := &addrCtx{
+ addr: expectedAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ info := "test info"
+ state := "test state"
+
+ signal, err := Interrupt(ctx, info, state, []*InterruptSignal{})
+ assert.NoError(t, err)
+ assert.NotNil(t, signal)
+ assert.True(t, signal.IsRootCause) // Should be true when sub contexts is empty
+ assert.Empty(t, signal.Subs)
+ })
+}
+
+func TestAddressMethods(t *testing.T) {
+ // Test Case 1: Address.String()
+ t.Run("AddressString", func(t *testing.T) {
+ addr := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ {Type: AddressSegmentNode, ID: "node1", SubID: "sub1"},
+ }
+
+ result := addr.String()
+ expected := "agent:agent1;tool:tool1;node:node1:sub1"
+ assert.Equal(t, expected, result)
+ })
+
+ // Test Case 2: Address.String() with empty address
+ t.Run("EmptyAddressString", func(t *testing.T) {
+ var addr Address
+ result := addr.String()
+ assert.Equal(t, "", result)
+ })
+
+ // Test Case 3: Address.Equals() with equal addresses
+ t.Run("AddressEquals", func(t *testing.T) {
+ addr1 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ }
+ addr2 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ }
+
+ assert.True(t, addr1.Equals(addr2))
+ })
+
+ // Test Case 4: Address.Equals() with different addresses
+ t.Run("AddressNotEquals", func(t *testing.T) {
+ addr1 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ }
+ addr2 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool2"},
+ }
+
+ assert.False(t, addr1.Equals(addr2))
+ })
+
+ // Test Case 5: Address.Equals() with different lengths
+ t.Run("AddressDifferentLengths", func(t *testing.T) {
+ addr1 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ {Type: AddressSegmentTool, ID: "tool1"},
+ }
+ addr2 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1"},
+ }
+
+ assert.False(t, addr1.Equals(addr2))
+ })
+
+ // Test Case 6: Address.Equals() with SubID differences
+ t.Run("AddressSubIDDifference", func(t *testing.T) {
+ addr1 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1", SubID: "sub1"},
+ }
+ addr2 := Address{
+ {Type: AddressSegmentAgent, ID: "agent1", SubID: "sub2"},
+ }
+
+ assert.False(t, addr1.Equals(addr2))
+ })
+}
+
+func TestAppendAddressSegment(t *testing.T) {
+ // Test Case 1: Append to empty address
+ t.Run("AppendToEmpty", func(t *testing.T) {
+ ctx := context.Background()
+
+ newCtx := AppendAddressSegment(ctx, AddressSegmentAgent, "agent1", "")
+
+ addr := GetCurrentAddress(newCtx)
+ assert.Len(t, addr, 1)
+ assert.Equal(t, AddressSegmentAgent, addr[0].Type)
+ assert.Equal(t, "agent1", addr[0].ID)
+ assert.Equal(t, "", addr[0].SubID)
+ })
+
+ // Test Case 2: Append to existing address
+ t.Run("AppendToExisting", func(t *testing.T) {
+ ctx := context.Background()
+
+ // First append
+ ctx = AppendAddressSegment(ctx, AddressSegmentAgent, "agent1", "")
+
+ // Second append
+ newCtx := AppendAddressSegment(ctx, AddressSegmentTool, "tool1", "call1")
+
+ addr := GetCurrentAddress(newCtx)
+ assert.Len(t, addr, 2)
+ assert.Equal(t, AddressSegmentAgent, addr[0].Type)
+ assert.Equal(t, "agent1", addr[0].ID)
+ assert.Equal(t, AddressSegmentTool, addr[1].Type)
+ assert.Equal(t, "tool1", addr[1].ID)
+ assert.Equal(t, "call1", addr[1].SubID)
+ })
+
+ // Test Case 3: Append with SubID
+ t.Run("AppendWithSubID", func(t *testing.T) {
+ ctx := context.Background()
+
+ newCtx := AppendAddressSegment(ctx, AddressSegmentTool, "tool1", "call123")
+
+ addr := GetCurrentAddress(newCtx)
+ assert.Len(t, addr, 1)
+ assert.Equal(t, AddressSegmentTool, addr[0].Type)
+ assert.Equal(t, "tool1", addr[0].ID)
+ assert.Equal(t, "call123", addr[0].SubID)
+ })
+}
+
+func TestPopulateInterruptState(t *testing.T) {
+ // Test Case 1: Populate with matching address
+ t.Run("PopulateMatchingAddress", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Set up current address
+ currentAddr := Address{{Type: AddressSegmentAgent, ID: "agent1"}}
+ runCtx := &addrCtx{
+ addr: currentAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ // Set up interrupt state data
+ id2Addr := map[string]Address{
+ "interrupt1": currentAddr,
+ }
+ id2State := map[string]InterruptState{
+ "interrupt1": {State: "test state"},
+ }
+
+ newCtx := PopulateInterruptState(ctx, id2Addr, id2State)
+
+ // Verify the state was populated
+ wasInterrupted, hasState, state := GetInterruptState[string](newCtx)
+ assert.True(t, wasInterrupted)
+ assert.True(t, hasState)
+ assert.Equal(t, "test state", state)
+ })
+
+ // Test Case 2: Populate with non-matching address
+ t.Run("PopulateNonMatchingAddress", func(t *testing.T) {
+ ctx := context.Background()
+
+ // Set up current address
+ currentAddr := Address{{Type: AddressSegmentAgent, ID: "agent1"}}
+ runCtx := &addrCtx{
+ addr: currentAddr,
+ }
+ ctx = context.WithValue(ctx, addrCtxKey{}, runCtx)
+
+ // Set up interrupt state data with different address
+ id2Addr := map[string]Address{
+ "interrupt1": {{Type: AddressSegmentAgent, ID: "agent2"}},
+ }
+ id2State := map[string]InterruptState{
+ "interrupt1": {State: "test state"},
+ }
+
+ newCtx := PopulateInterruptState(ctx, id2Addr, id2State)
+
+ // Verify the state was NOT populated (no matching address)
+ wasInterrupted, hasState, state := GetInterruptState[string](newCtx)
+ assert.False(t, wasInterrupted)
+ assert.False(t, hasState)
+ assert.Equal(t, "", state)
+ })
+
+ // Test Case 3: Populate with empty data
+ t.Run("PopulateEmptyData", func(t *testing.T) {
+ ctx := context.Background()
+
+ newCtx := PopulateInterruptState(ctx, map[string]Address{}, map[string]InterruptState{})
+
+ // Verify no state was populated
+ wasInterrupted, hasState, state := GetInterruptState[string](newCtx)
+ assert.False(t, wasInterrupted)
+ assert.False(t, hasState)
+ assert.Equal(t, "", state)
+ })
+}
+
+func TestStringMethods(t *testing.T) {
+ // Test Case 1: InterruptSignal.Error()
+ t.Run("InterruptSignalError", func(t *testing.T) {
+ signal := &InterruptSignal{
+ ID: "test-id",
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ InterruptInfo: InterruptInfo{
+ Info: "test info",
+ },
+ InterruptState: InterruptState{
+ State: "test state",
+ LayerSpecificPayload: "test payload",
+ },
+ Subs: []*InterruptSignal{
+ {ID: "sub1"},
+ },
+ }
+
+ errorStr := signal.Error()
+ expectedContains := []string{
+ "interrupt signal:",
+ "ID=test-id",
+ "Addr=agent:agent1",
+ "Info=interrupt info: Info=test info, IsRootCause=false",
+ "State=interrupt state: State=test state, LayerSpecificPayload=test payload",
+ "SubsLen=1",
+ }
+
+ for _, expected := range expectedContains {
+ assert.Contains(t, errorStr, expected)
+ }
+ })
+
+ // Test Case 2: InterruptState.String()
+ t.Run("InterruptStateString", func(t *testing.T) {
+ state := &InterruptState{
+ State: "test state",
+ LayerSpecificPayload: "test payload",
+ }
+
+ result := state.String()
+ expected := "interrupt state: State=test state, LayerSpecificPayload=test payload"
+ assert.Equal(t, expected, result)
+ })
+
+ // Test Case 3: InterruptState.String() with nil
+ t.Run("InterruptStateStringNil", func(t *testing.T) {
+ var state *InterruptState
+ result := state.String()
+ assert.Equal(t, "", result)
+ })
+
+ // Test Case 4: InterruptInfo.String()
+ t.Run("InterruptInfoString", func(t *testing.T) {
+ info := &InterruptInfo{
+ Info: "test info",
+ IsRootCause: true,
+ }
+
+ result := info.String()
+ expected := "interrupt info: Info=test info, IsRootCause=true"
+ assert.Equal(t, expected, result)
+ })
+
+ // Test Case 5: InterruptInfo.String() with nil
+ t.Run("InterruptInfoStringNil", func(t *testing.T) {
+ var info *InterruptInfo
+ result := info.String()
+ assert.Equal(t, "", result)
+ })
+}
+
+func TestInterruptCtxEqualsWithoutID(t *testing.T) {
+ // Test Case 1: Equal contexts
+ t.Run("EqualContexts", func(t *testing.T) {
+ ctx1 := &InterruptCtx{
+ ID: "id1",
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Info: "info1",
+ IsRootCause: true,
+ }
+ ctx2 := &InterruptCtx{
+ ID: "id2", // Different ID should be ignored
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Info: "info1",
+ IsRootCause: true,
+ }
+
+ assert.True(t, ctx1.EqualsWithoutID(ctx2))
+ })
+
+ // Test Case 2: Different addresses
+ t.Run("DifferentAddresses", func(t *testing.T) {
+ ctx1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ }
+ ctx2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent2"}},
+ }
+
+ assert.False(t, ctx1.EqualsWithoutID(ctx2))
+ })
+
+ // Test Case 3: Different root cause flags
+ t.Run("DifferentRootCause", func(t *testing.T) {
+ ctx1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ IsRootCause: true,
+ }
+ ctx2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ IsRootCause: false,
+ }
+
+ assert.False(t, ctx1.EqualsWithoutID(ctx2))
+ })
+
+ // Test Case 4: Different info
+ t.Run("DifferentInfo", func(t *testing.T) {
+ ctx1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Info: "info1",
+ }
+ ctx2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Info: "info2",
+ }
+
+ assert.False(t, ctx1.EqualsWithoutID(ctx2))
+ })
+
+ // Test Case 5: Nil contexts
+ t.Run("NilContexts", func(t *testing.T) {
+ var ctx1 *InterruptCtx
+ var ctx2 *InterruptCtx
+
+ assert.True(t, ctx1.EqualsWithoutID(ctx2))
+
+ ctx3 := &InterruptCtx{}
+ assert.False(t, ctx1.EqualsWithoutID(ctx3))
+ assert.False(t, ctx3.EqualsWithoutID(ctx1))
+ })
+
+ // Test Case 6: With parent contexts
+ t.Run("WithParentContexts", func(t *testing.T) {
+ parent1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "parent"}},
+ }
+ parent2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "parent"}},
+ }
+
+ ctx1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Parent: parent1,
+ }
+ ctx2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Parent: parent2,
+ }
+
+ assert.True(t, ctx1.EqualsWithoutID(ctx2))
+ })
+
+ // Test Case 7: Different parent contexts
+ t.Run("DifferentParentContexts", func(t *testing.T) {
+ parent1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "parent1"}},
+ }
+ parent2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "parent2"}},
+ }
+
+ ctx1 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Parent: parent1,
+ }
+ ctx2 := &InterruptCtx{
+ Address: Address{{Type: AddressSegmentAgent, ID: "agent1"}},
+ Parent: parent2,
+ }
+
+ assert.False(t, ctx1.EqualsWithoutID(ctx2))
+ })
+}
diff --git a/internal/core/resume.go b/internal/core/resume.go
new file mode 100644
index 00000000..684fd6cb
--- /dev/null
+++ b/internal/core/resume.go
@@ -0,0 +1,107 @@
+/*
+ * Copyright 2025 CloudWeGo Authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package core
+
+import "context"
+
+// GetInterruptState provides a type-safe way to check for and retrieve the persisted state from a previous interruption.
+// It is the primary function a component should use to understand its past state.
+//
+// It returns three values:
+// - wasInterrupted (bool): True if the node was part of a previous interruption, regardless of whether state was provided.
+// - state (T): The typed state object, if it was provided and matches type `T`.
+// - hasState (bool): True if state was provided during the original interrupt and successfully cast to type `T`.
+func GetInterruptState[T any](ctx context.Context) (wasInterrupted bool, hasState bool, state T) {
+ rCtx, ok := getRunCtx(ctx)
+ if !ok || rCtx.interruptState == nil {
+ return
+ }
+
+ wasInterrupted = true
+ if rCtx.interruptState.State == nil {
+ return
+ }
+
+ state, hasState = rCtx.interruptState.State.(T)
+ return
+}
+
+// GetResumeContext checks if the current component is the target of a resume operation
+// and retrieves any data provided by the user for that resumption.
+//
+// This function is typically called *after* a component has already determined it is in a
+// resumed state by calling GetInterruptState.
+//
+// It returns three values:
+// - isResumeFlow: A boolean that is true if the current component's address was explicitly targeted
+// by a call to Resume() or ResumeWithData().
+// - hasData: A boolean that is true if data was provided for this component (i.e., not nil).
+// - data: The typed data provided by the user.
+//
+// ### How to Use This Function: A Decision Framework
+//
+// The correct usage pattern depends on the application's desired resume strategy.
+//
+// #### Strategy 1: Implicit "Resume All"
+// In some use cases, any resume operation implies that *all* interrupted points should proceed.
+// For example, if an application's UI only provides a single "Continue" button for a set of
+// interruptions. In this model, a component can often just use `GetInterruptState` to see if
+// `wasInterrupted` is true and then proceed with its logic, as it can assume it is an intended target.
+// It may still call `GetResumeContext` to check for optional data, but the `isResumeFlow` flag is less critical.
+//
+// #### Strategy 2: Explicit "Targeted Resume" (Most Common)
+// For applications with multiple, distinct interrupt points that must be resumed independently, it is
+// crucial to differentiate which point is being resumed. This is the primary use case for the `isResumeFlow` flag.
+// - If `isResumeFlow` is `true`: Your component is the explicit target. You should consume
+// the `data` (if any) and complete your work.
+// - If `isResumeFlow` is `false`: Another component is the target. You MUST re-interrupt
+// (e.g., by returning `StatefulInterrupt(...)`) to preserve your state and allow the
+// resume signal to propagate.
+//
+// ### Guidance for Composite Components
+//
+// Composite components (like `Graph` or other `Runnable`s that contain sub-processes) have a dual role:
+// 1. Check for Self-Targeting: A composite component can itself be the target of a resume
+// operation, for instance, to modify its internal state. It may call `GetResumeContext`
+// to check for data targeted at its own address.
+// 2. Act as a Conduit: After checking for itself, its primary role is to re-execute its children,
+// allowing the resume context to flow down to them. It must not consume a resume signal
+// intended for one of its descendants.
+func GetResumeContext[T any](ctx context.Context) (isResumeTarget bool, hasData bool, data T) {
+ rCtx, ok := getRunCtx(ctx)
+ if !ok {
+ return
+ }
+
+ isResumeTarget = rCtx.isResumeTarget
+ if !isResumeTarget {
+ return
+ }
+
+ // It is a resume flow, now check for data
+ if rCtx.resumeData == nil {
+ return // hasData is false
+ }
+
+ data, hasData = rCtx.resumeData.(T)
+ return
+}
+
+func getRunCtx(ctx context.Context) (*addrCtx, bool) {
+ rCtx, ok := ctx.Value(addrCtxKey{}).(*addrCtx)
+ return rCtx, ok
+}