/**
 * Retains a stable prefix and suffix while counting the bytes dropped from the
 * middle. This is the same shape Codex uses for unified exec output.
 */
export declare class BoundedOutputBuffer {
    #private;
    constructor(maxBytes: number);
    get totalBytes(): number;
    get omittedBytes(): number;
    get retainedBytes(): number;
    append(chunk: Buffer): void;
    snapshot(omittedBytes?: number): Buffer;
    snapshotFromOffset(offset: number): {
        buffer: Buffer;
        omittedBytes: number;
        totalBytes: number;
    };
    drain(): BoundedOutputBuffer;
    clone(): BoundedOutputBuffer;
}