WorkflowChainTransition

CORE · interface · Type contract

Actual handoff evidence; a target span does not prove its enter event was captured.

Import

TypeScript

import type { WorkflowChainTransition } from '@jangts/agent-core/engine';

JavaScript

/** @typedef {import('@jangts/agent-core/engine').WorkflowChainTransition} WorkflowChainTransition */

Other public entry points:@jangts/agent-core, @jangts/agent-core/engine, @jangts/agent-core/types, @jangts/agent-core/structs.

Definition

interface WorkflowChainTransition

Field structure

Field	Type	Required	Description
eventId	string	Required	Read-only. See the type definition and usage context.
producerSequence	number	Required	Read-only. See the type definition and usage context.
occurredAtMs	number	Required	Read-only. See the type definition and usage context.
type	"transition" | "complete"	Required	Read-only. See the type definition and usage context.
sourceSpanId	string	Required	Read-only. See the type definition and usage context.
targetSpanId	string | undefined	Optional	Read-only. See the type definition and usage context.
targetNodeId	string | undefined	Optional	Read-only. See the type definition and usage context.
routeOrder	number | undefined	Optional	Read-only. See the type definition and usage context.
routeId	string | undefined	Optional	Read-only. See the type definition and usage context.
conditionId	string | undefined	Optional	Read-only. See the type definition and usage context.
errorEventId	string | undefined	Optional	Read-only. See the type definition and usage context.

Examples

• Workflow: nodes, routes, and partial state updates: Use a single node definition that actually participates in execution to show order, branches, error destinations, and end conditions together.
• Reusing a base Workflow and Agent branches: add preserves the old Workflow and produces a new combined Workflow; fork inherits existing bindings and the branch origin.

A single node completes the greeting

Beginner · Node.js

TypeScript

import { AgentCoreEngine, defineWorkflow, route } from '@jangts/agent-core/engine';

type State = { name: string; answer?: string };
const workflow = defineWorkflow<State, string>({
  id: 'greeting',
  nodes: [{
    id: 'greet', description: '根据本次姓名生成问候', startsRound: true,
    run: state => ({ answer: '你好，' + state.name }),
    routes: [route.deliver('answer')],
  }],
});
console.log(workflow.entryNodeId);
console.log(workflow.describe());

JavaScript

import { AgentCoreEngine, defineWorkflow, route } from '@jangts/agent-core/engine';
const workflow = defineWorkflow({
    id: 'greeting',
    nodes: [{
            id: 'greet', description: '根据本次姓名生成问候', startsRound: true,
            run: state => ({ answer: '你好，' + state.name }),
            routes: [route.deliver('answer')],
        }],
});
console.log(workflow.entryNodeId);
console.log(workflow.describe());

Add a validation stage without changing state or the run call

Configuration · Node.js

TypeScript

import { AgentCoreEngine, defineWorkflow, route } from '@jangts/agent-core/engine';
type State = { name: string; answer?: string; error?: string };
const workflow = defineWorkflow<State, string>({
  id: 'greeting',
  nodes: [
    { id: 'check', description: '检查姓名', startsRound: true,
      run: state => ({ error: state.name.trim() ? undefined : '姓名不能为空' }),
      routes: [route.toIfError('failure'), route.to('greet')] },
    { id: 'greet', description: '生成问候', provides: ['answer'],
      run: state => ({ answer: '你好，' + state.name }), routes: [route.deliver('answer')] },
    { id: 'failure', description: '返回校验提示', requires: ['error'], routes: [route.deliver('error')] },
  ],
});
console.log(await new AgentCoreEngine({ workflow }).run({ name: 'Ivan' }));

JavaScript

import { AgentCoreEngine, defineWorkflow, route } from '@jangts/agent-core/engine';
const workflow = defineWorkflow({
    id: 'greeting',
    nodes: [
        { id: 'check', description: '检查姓名', startsRound: true,
            run: state => ({ error: state.name.trim() ? undefined : '姓名不能为空' }),
            routes: [route.toIfError('failure'), route.to('greet')] },
        { id: 'greet', description: '生成问候', provides: ['answer'],
            run: state => ({ answer: '你好，' + state.name }), routes: [route.deliver('answer')] },
        { id: 'failure', description: '返回校验提示', requires: ['error'], routes: [route.deliver('error')] },
    ],
});
console.log(await new AgentCoreEngine({ workflow }).run({ name: 'Ivan' }));

Related policy source

• Execution implementation of the bounded loop, commit, and cancellation
• Reference, reachability, and bounded-loop validation