ContextProcessingOptions

SUPPORT · interface · Type contract

Runtime inputs for one processing run.

Import

TypeScript

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

JavaScript

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

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

Definition

interface ContextProcessingOptions

Extends or implements: ExecutionContext.

Field structure

Field	Type	Required	Description
stageId	string	Required	Read-only. Stage the processing belongs to; reported in diagnostics and selection calls.
compressors	readonly ContextCompressor[]	Required	Read-only. Compressors available by handler id.
selectors	readonly ContextSelector[] | undefined	Optional	Read-only. Selectors available by handler id; required only for model selection.
callModel	ContextModelCall	Required	Read-only. See the type definition and usage context.
remainingCalls	(() => number) | undefined	Optional	Read-only. Remaining model calls; used to reject unaffordable selections.
tokenBudget	ContextTokenMeasurement | undefined	Optional	Read-only. Token measurement; without it, token triggers and targets cannot apply.
logger	SubFlowLog | undefined	Optional	Read-only. Explicit optional recorder for this operation; never inferred from diagnostics.
signal	AbortSignal	Required	Read-only. Non-optional cancellation signal; never undefined once execution has started.
diagnostics	DiagnosticContext | undefined	Optional	Read-only. Diagnostic scope of the enclosing call, when recording is enabled.

Member index

Member	Purpose
callModel	See the overload below for full inputs and outputs.

Member details

callModel

ContextProcessingOptions.callModel(request: ContextModelRequest): Promise<ModelResult<unknown>>

Parameter	Type	Passing	Description
request	ContextModelRequest	Required	—

Fields of request

Field	Type	Required	Description
modelId	string | undefined	Optional	Read-only. See the type definition and usage context.
stageId	string	Required	Read-only. See the type definition and usage context.
input	readonly ModelMessage[] | BuiltContext	Required	Read-only. See the type definition and usage context.
maxOutputTokens	number	Required	Read-only. See the type definition and usage context.
transport	string	Required	Read-only. See the type definition and usage context.

Returns: Promise<ModelResult<unknown>>.

Awaited value: ModelResult<unknown>.

Return value structure

Field	Type	Required	Description
value	unknown	Required	Read-only. See the type definition and usage context.
invocation	Readonly<ModelCallRecord>	Required	Read-only. See the type definition and usage context.

Examples

• Context policy: validate, reduce, and audit: Support provides replaceable policy implementations while Core keeps the final input contract and budget checks.

Explicitly use a validation-only policy

Beginner · Node.js

TypeScript

import { Support } from '@jangts/agent-core';
import type { ContextPolicy } from '@jangts/agent-core/support/context';
const policy: ContextPolicy = { mode: 'validate' };
Support.validateContextPolicy(policy, [], []);
console.log(policy.mode);

JavaScript

import { Support } from '@jangts/agent-core';
const policy = { mode: 'validate' };
Support.validateContextPolicy(policy, [], []);
console.log(policy.mode);

Configure reduction order from real business fragments

Configuration · Node.js

These numbers are explicit choices for the example business, not SDK recommendations for capacities that suit all models.

TypeScript

import { Support } from '@jangts/agent-core';
import type { ContextPolicy } from '@jangts/agent-core/support/context';
const policy: ContextPolicy = { mode: 'reduce', triggerChars: 1800, targetInputChars: 1500,
  selection: { mode: 'sequence' },
  steps: [{ id: 'recent-history', kind: 'trim', fragmentId: 'history', field: 'messages',
    grouping: { kind: 'user-turn' }, keepGroups: 2, targetChars: 1000 }],
};
Support.validateContextPolicy(policy, [], []);
console.log(policy.steps);

JavaScript

import { Support } from '@jangts/agent-core';
const policy = { mode: 'reduce', triggerChars: 1800, targetInputChars: 1500,
    selection: { mode: 'sequence' },
    steps: [{ id: 'recent-history', kind: 'trim', fragmentId: 'history', field: 'messages',
            grouping: { kind: 'user-turn' }, keepGroups: 2, targetChars: 1000 }],
};
Support.validateContextPolicy(policy, [], []);
console.log(policy.steps);

Related policy source

• Real scheduling catalog for policies and reduction operations

Related definitions

• ContextCompressor
• ContextModelCall
• ContextModelRequest
• ContextSelector
• ContextTokenMeasurement
• DiagnosticContext
• ExecutionContext
• ModelCallRecord
• ModelResult
• SubFlowLog