ContextStrategySettings

SUPPORT · type · 类型合同

Shared reduce-policy settings applied to the whole strategy.

Trigger and target fields follow the Core policy contract; omitted values fall back to the plan budget or to the trigger. Supplying steps disables generation and uses the explicit list.

导入

TypeScript

import type { ContextStrategySettings } from '@jangts/agent-core/support';

JavaScript

/** @typedef {import('@jangts/agent-core/support').ContextStrategySettings} ContextStrategySettings */

其他公开入口：@jangts/agent-core/support、@jangts/agent-core/support/context。

定义

类型： ContextStrategySettings

类型表达式

type ContextStrategySettings = Omit<
  Extract<ContextPolicy, { mode: 'reduce' }>,
  'mode' | 'steps'
> & {
  readonly steps?: readonly ContextReduction[];
  readonly compressors?: readonly ContextCompressor[];
  readonly selectors?: readonly ContextSelector[];
};

字段结构

字段	类型	必需	说明
selection	ContextSelection | undefined	可省略	见类型定义及调用场景。
triggerChars	number | undefined	可省略	见类型定义及调用场景。
targetInputChars	number | undefined	可省略	见类型定义及调用场景。
targetInputTokens	number | undefined	可省略	见类型定义及调用场景。
triggerTokens	number | undefined	可省略	见类型定义及调用场景。
steps	readonly ContextReduction[] | undefined	可省略	只读。见类型定义及调用场景。
compressors	readonly ContextCompressor[] | undefined	可省略	只读。见类型定义及调用场景。
selectors	readonly ContextSelector[] | undefined	可省略	只读。见类型定义及调用场景。

使用示例

• 从历史语义生成处理策略：复用片段身份与硬预算，生成 recent 或 continuity 的完整步骤和引用。

复用已有片段生成最近历史策略

入门 · Node.js

TypeScript

import { Support } from '@jangts/agent-core';
const fragment = { id: 'history', maxChars: 4000 };
const strategy = Support.createContextStrategy({ kind: 'recent', fragment, field: 'messages' });
console.log(strategy.policy, strategy.compressors);

JavaScript

import { Support } from '@jangts/agent-core';
const fragment = { id: 'history', maxChars: 4000 };
const strategy = Support.createContextStrategy({ kind: 'recent', fragment, field: 'messages' });
console.log(strategy.policy, strategy.compressors);

同一配置增加保留组数与目标大小

配置 · Node.js

TypeScript

import { Support } from '@jangts/agent-core';
const fragment = { id: 'history', maxChars: 4000 };
const strategy = Support.createContextStrategy({ kind: 'recent', fragment, field: 'messages',
  keepGroups: 3, targetChars: 2500, grouping: { kind: 'user-turn' },
});
console.log(strategy.policy);

JavaScript

import { Support } from '@jangts/agent-core';
const fragment = { id: 'history', maxChars: 4000 };
const strategy = Support.createContextStrategy({ kind: 'recent', fragment, field: 'messages',
    keepGroups: 3, targetChars: 2500, grouping: { kind: 'user-turn' },
});
console.log(strategy.policy);

相关策略源码

• 场景目录、生成的步骤和精确覆盖

相关定义

• ContextCompressor
• ContextHandlerReference
• ContextPolicy
• ContextReduction
• ContextSelector