MockGPTOptions

KIT · interface · Type contract

Construction options of a MockGPT instance.

Import

TypeScript

import type { MockGPTOptions } from '@jangts/agent-core/mock';

JavaScript

/** @typedef {import('@jangts/agent-core/mock').MockGPTOptions} MockGPTOptions */

Other public entry points:@jangts/agent-core/mock.

Definition

interface MockGPTOptions

Field structure

Field	Type	Required	Description
rules	readonly Rule[]	Required	Ordered rules; the first rule whose filters all pass wins, so order is significant.
fallback	Generator | undefined	Optional	Generator used when no rule matches; absent makes an unmatched call a MOCK_RULE_NOT_FOUND error.
selectPrompt	((request: ModelRequest) => string) | undefined	Optional	Overrides prompt extraction; must return a string synchronously; default is the last user text.
stream	Pick<OutputOptions, "chunkSize" | "intervalMs" | "wireChunkSize"> | undefined	Optional	Defaults merged under every generated output; explicit output fields take precedence.
seed	number | undefined	Optional	Seed for the deterministic PRNG (0-0xffffffff); default 1, so identical call sequences repeat.
clock	(() => number) | undefined	Optional	Millisecond timestamp source for date generators and response created; must be finite.
recordLimit	number | undefined	Optional	Ring-buffer size of records; 0 disables recording; max 10 000; default 100.
maxBodyBytes	number | undefined	Optional	Maximum accepted request body in bytes for fetch; default 1 MiB.
maxOutputChars	number | undefined	Optional	Maximum generated content in code points plus serialized tool calls; default 1 000 000.

Examples

• MockGPT: direct generation and Provider injection: Get a string or JSON directly; inject the same instance into a Provider when you need to exercise model communication.

Generate native JSON directly

Beginner · Node.js

TypeScript

import { MockGPT } from '@jangts/agent-core/mock';
const mock = new MockGPT({ rules: [{ prompt: '服务状态', generator: { online: true, source: 'fixture' } }] });
const value = await mock.generate({ model: 'demo', messages: [{ role: 'user', content: '服务状态' }] });
console.log(value); // { online: true, source: 'fixture' }
console.log(mock.counts, mock.records);

JavaScript

import { MockGPT } from '@jangts/agent-core/mock';
const mock = new MockGPT({ rules: [{ prompt: '服务状态', generator: { online: true, source: 'fixture' } }] });
const value = await mock.generate({ model: 'demo', messages: [{ role: 'user', content: '服务状态' }] });
console.log(value); // { online: true, source: 'fixture' }
console.log(mock.counts, mock.records);

Inject the same instance into the real Core model boundary

Configuration · Node.js

TypeScript

import { ModelRunner, Support } from '@jangts/agent-core';
import { MockGPT, responses } from '@jangts/agent-core/mock';
const mock = new MockGPT({ rules: [{ prompt: '服务状态', generator: responses.text('服务在线。', { chunkSize: 2, wireChunkSize: 3 }) }] });
const provider = new Support.CompatibleModelProvider({
  config: { baseUrl: 'https://mock.local/v1', apiKey: 'offline-example', model: 'demo' },
  ports: { request: mock.fetch },
});
const result = await new ModelRunner({ provider, maxCalls: 1 }).invoke('服务状态');
console.log(result.value, result.invocation.status);

JavaScript

import { ModelRunner, Support } from '@jangts/agent-core';
import { MockGPT, responses } from '@jangts/agent-core/mock';
const mock = new MockGPT({ rules: [{ prompt: '服务状态', generator: responses.text('服务在线。', { chunkSize: 2, wireChunkSize: 3 }) }] });
const provider = new Support.CompatibleModelProvider({
    config: { baseUrl: 'https://mock.local/v1', apiKey: 'offline-example', model: 'demo' },
    ports: { request: mock.fetch },
});
const result = await new ModelRunner({ provider, maxCalls: 1 }).invoke('服务状态');
console.log(result.value, result.invocation.status);

Related definitions

• Generator
• JsonValue
• ModelRequest
• OutputOptions
• ResponseDescription
• Rule