ContextStrategySettings

SUPPORT · type · Type contract

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.

Import

TypeScript

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

JavaScript

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

Other public entry points:@jangts/agent-core/support, @jangts/agent-core/support/context.

Definition

Type: ContextStrategySettings

Type expression

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

Field structure

Field	Type	Required	Description
selection	ContextSelection | undefined	Optional	See the type definition and usage context.
triggerChars	number | undefined	Optional	See the type definition and usage context.
targetInputChars	number | undefined	Optional	See the type definition and usage context.
targetInputTokens	number | undefined	Optional	See the type definition and usage context.
triggerTokens	number | undefined	Optional	See the type definition and usage context.
steps	readonly ContextReduction[] | undefined	Optional	Read-only. See the type definition and usage context.
compressors	readonly ContextCompressor[] | undefined	Optional	Read-only. See the type definition and usage context.
selectors	readonly ContextSelector[] | undefined	Optional	Read-only. See the type definition and usage context.

Examples

• Generate processing strategies from history semantics: Reuse fragment identity and hard budgets to generate complete steps and references for recent or continuity.

Reuse an existing fragment to generate a recent-history strategy

Beginner · 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);

Add kept groups and target size to the same configuration

Configuration · 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);

Related policy source

• Scenario catalog, generated steps, and precise overrides

Related definitions

• ContextCompressor
• ContextHandlerReference
• ContextPolicy
• ContextReduction
• ContextSelector