import { Writable } from 'node:stream';
export declare class StreamManager {
    private truncateOutputLength?;
    private outStream?;
    private errStream?;
    private isJson;
    private state;
    constructor(truncateOutputLength?: number | undefined, outStream?: Writable | undefined, errStream?: Writable | undefined, isJson?: boolean);
    private getState;
    private stripAnsi;
    private resolveCarriageReturns;
    processChunk(isErr: boolean, data: string): string;
    flushPendingLine(isErr: boolean): string;
    flushChunk(isErr: boolean): string;
    writeData(isErr: boolean, str: string, outFileName?: string, errFileName?: string): Writable[];
    addLength(isErr: boolean, length: number): void;
    getLength(isErr: boolean): number;
    getBufferedLength(isErr: boolean): number;
}
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