import type { ChatMessage, ProviderId, ToolDefinition } from "../../types.js";
export interface CompactionRequestEstimatorPorts {
    readonly provider: ProviderId;
    readonly model: string;
    readonly selectTools: () => ToolDefinition[] | undefined;
}
export declare const createCompactionRequestEstimator: (ports: CompactionRequestEstimatorPorts) => (messages: readonly ChatMessage[]) => number;