ModelInvocationContext

KIT · interface · 类型合同

One take consumes one binding invocation attempt, independent of batch size or chat tokens.

导入

TypeScript

import type { ModelInvocationContext } from '@jangts/agent-core/kits/inference';

JavaScript

/** @typedef {import('@jangts/agent-core/kits/inference').ModelInvocationContext} ModelInvocationContext */

其他公开入口：@jangts/agent-core/types、@jangts/agent-core/kits、@jangts/agent-core/kits/inference。

定义

interface ModelInvocationContext

继承或实现： ExecutionContext。

字段结构

字段	类型	必需	说明
attemptBudget	Pick<AttemptBudget, "take"> | undefined	可省略	只读。Shared attempt budget; a refusal fails the call with BudgetError before invoking.
logger	SubFlowLog | undefined	可省略	只读。Explicit optional recorder for this operation; never inferred from diagnostics.
signal	AbortSignal	必需	只读。Non-optional cancellation signal; never undefined once execution has started.
diagnostics	DiagnosticContext | undefined	可省略	只读。Diagnostic scope of the enclosing call, when recording is enabled.

使用示例

• ModelCalls：外部推理绑定：为 embedding 等 App 自定义 I/O 绑定身份、校验、取消与统一调用回执。

先绑定一个离线演示向量算法

入门 · Node.js

算法只演示 I/O 绑定，不提供真实语言向量质量。

TypeScript

import { ModelCalls } from '@jangts/agent-core/kits/inference';
const models = new ModelCalls([
  { id: 'demo-vector', identity: 'length-direction-v1', invoke: (text: string) => [text.length, 1] },
] as const);
const result = await models.invoke({ modelId: 'demo-vector', input: 'Agent Core', timeoutMs: 1000 }, { signal: new AbortController().signal });
console.log(result.value, result.invocation.modelId);

JavaScript

import { ModelCalls } from '@jangts/agent-core/kits/inference';
const models = new ModelCalls([
    { id: 'demo-vector', identity: 'length-direction-v1', invoke: (text) => [text.length, 1] },
]);
const result = await models.invoke({ modelId: 'demo-vector', input: 'Agent Core', timeoutMs: 1000 }, { signal: new AbortController().signal });
console.log(result.value, result.invocation.modelId);

在同一 invoke 上增加输入输出检查和取消

配置 · Node.js

TypeScript

import { ModelCalls } from '@jangts/agent-core/kits/inference';
const models = new ModelCalls([
  { id: 'demo-vector', identity: 'length-direction-v1',
    assertInput(text: string) { if (!text.trim()) throw new Error('文本为空'); },
    invoke(text: string, context) { context.signal.throwIfAborted(); return [text.length, 1]; },
    assertOutput(vector: number[]) { if (vector.length !== 2 || vector.some(value => !Number.isFinite(value))) throw new Error('向量无效'); },
  },
] as const);
const controller = new AbortController();
const result = await models.invoke({ modelId: 'demo-vector', input: 'Agent Core', timeoutMs: 1000 }, { signal: controller.signal });
console.log(models.identity('demo-vector'), result.value);

JavaScript

import { ModelCalls } from '@jangts/agent-core/kits/inference';
const models = new ModelCalls([
    { id: 'demo-vector', identity: 'length-direction-v1',
        assertInput(text) { if (!text.trim())
            throw new Error('文本为空'); },
        invoke(text, context) { context.signal.throwIfAborted(); return [text.length, 1]; },
        assertOutput(vector) { if (vector.length !== 2 || vector.some(value => !Number.isFinite(value)))
            throw new Error('向量无效'); },
    },
]);
const controller = new AbortController();
const result = await models.invoke({ modelId: 'demo-vector', input: 'Agent Core', timeoutMs: 1000 }, { signal: controller.signal });
console.log(models.identity('demo-vector'), result.value);

相关策略源码

• 绑定、校验、期限与真实回执

相关定义

• AttemptBudget
• DiagnosticContext
• ExecutionContext
• SubFlowLog