import type { Session } from '../types/index.js';
import { ContextBudget, type ContextBudgetConfig } from './ContextBudget.js';
import { TokenAccumulator } from './TokenAccumulator.js';
export declare function getOrCreateTokenAccumulator(session: Session, modelContextWindow?: number): TokenAccumulator;
export declare function getOrCreateContextBudgetValidator(session: Session, partial?: Partial<ContextBudgetConfig>): ContextBudget;