export type SpilledOutput = {
    path: string;
    bytes: number;
    lines: number;
};
export declare class ToolOutputStore {
    private readonly dir;
    private counter;
    constructor(dir: string);
    save(tool: string, content: string): Promise<SpilledOutput>;
    cleanup(maxAgeDays?: number): Promise<number>;
}
export declare function countLines(content: string): number;