/** Minimal write sink: anything that accepts a string chunk. */
export interface WriteTarget {
    write(chunk: string): unknown;
}
/** Write a line to a target, defaulting to stdout. */
export declare function echo(message: string, target?: WriteTarget): void;
/** Write a line to a target, defaulting to stderr. */
export declare function echoError(message: string, target?: WriteTarget): void;
/**
 * Override the default stdout/stderr targets.
 *
 * Returns a rollback function that restores the previous targets.
 */
export declare function setDefaultOutputTargets(opts: {
    stdout?: WriteTarget;
    stderr?: WriteTarget;
}): () => void;
/** Terminates the current process with `code`. Anything matching `(code?: number) => never`. */
export type ExitTarget = (code?: number) => never;
/**
 * Terminate the process with the given exit code — the single sanctioned seam
 * for `process.exit` in the workspace (enforced by the `no-direct-process-exit`
 * spur rule). Defaults to `0`. Pass or set an {@link ExitTarget} to intercept
 * in tests or non-`process` runtimes.
 */
export declare function exitProcess(code?: number, target?: ExitTarget): never;
/**
 * Override the default exit target.
 *
 * Returns a rollback function that restores the previous target.
 */
export declare function setDefaultExitTarget(target: ExitTarget | undefined): () => void;
/** In-memory `WriteTarget` that records all chunks for later retrieval. */
export interface BufferTarget extends WriteTarget {
    readonly chunks: string[];
    text(): string;
    clear(): void;
}
/** Create an in-memory {@link BufferTarget} for capturing output during tests or tooling. */
export declare function createBufferTarget(): BufferTarget;
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