AgentCheckpointRecord

CORE · interface · Type contract

Host-owned serializable data, never a saved credential, model budget or executable handler.

Import

TypeScript

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

JavaScript

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

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

Definition

interface AgentCheckpointRecord<Data>

Type parameters

Type parameter	Constraint	Default type
Data	—	—

Field structure

Field	Type	Required	Description
id	string	Required	Read-only. Checkpoint identifier, preserved across export and restore.
source	AgentBranch	Required	Read-only. Validated branch identity captured at checkpoint time.
data	Data	Required	Read-only. Detached data payload; serializable by the host.

Examples

• Agent: run first, then bind tools and dependencies step by step: The Engine executes a bounded loop; after a Workflow is bound, each run only receives the data that changed in state.
• 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.
• Bind once, multiple models per run, and switching across runs: Provide stable model configuration at construction; requests select by configuration ID instead of injecting a Provider repeatedly.
• Real tool invocation and in-request runtime: Core registers and executes real tools and returns receipts carrying an invocation; business authorization is owned by the implementation registered by the App.

A single ordinary step is enough to run

Beginner · Node.js

TypeScript

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

const agent = new AgentCoreEngine<string>();
const answer = await agent.run(() => ({ type: 'complete', value: '你好，Core' }));
console.log(answer);

JavaScript

import { AgentCoreEngine } from '@jangts/agent-core/engine';
const agent = new AgentCoreEngine();
const answer = await agent.run(() => ({ type: 'complete', value: '你好，Core' }));
console.log(answer);

Add an explicit Workflow and still call run

Configuration · 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')],
  }],
});

const agent = new AgentCoreEngine({ workflow });
console.log(await agent.run({ name: 'Ivan' }));
console.log(await agent.run({ name: '访客' }));

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')],
        }],
});
const agent = new AgentCoreEngine({ workflow });
console.log(await agent.run({ name: 'Ivan' }));
console.log(await agent.run({ name: '访客' }));

Related policy source

• Execution implementation of the bounded loop, commit, and cancellation
• Check order for tool input, execution, output, and late results

Related definitions

• AgentBranch