import { type CreateOutputOptions, type Output } from './output.js';
export interface MemoryOutput {
    output: Output;
    /** Everything written to stdout so far. */
    stdout: () => string;
    /** Everything written to stderr so far. */
    stderr: () => string;
}
/**
 * An {@link Output} that captures writes in memory instead of
 * touching the process streams, for asserting on CLI output.
 */
export declare const createMemoryOutput: (options?: Omit<CreateOutputOptions, "stdout" | "stderr">) => MemoryOutput;