import type { CoreMessage } from "ai";
import type { Message } from "./validators.js";
export declare const DEFAULT_RECENT_MESSAGES = 100;
export declare function isTool(message: Message | CoreMessage): boolean;
export declare function extractText(message: Message | CoreMessage): string | undefined;
export declare const DEFAULT_MESSAGE_RANGE: {
    before: number;
    after: number;
};
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