/**
 * Output utilities for CLI
 * Ensures stdout/stderr separation invariant
 */
export interface OutputOptions {
    output?: string;
    quiet?: boolean;
    includeBom?: boolean;
}
/**
 * Writer that respects stdout/stderr separation
 * - Data goes to stdout (or file)
 * - Everything else goes to stderr
 */
export declare class OutputWriter {
    private readonly outputPath;
    private readonly quiet;
    private readonly includeBom;
    private isFirstWrite;
    constructor(options?: OutputOptions);
    /**
     * Write data to stdout or file
     * This is the ONLY way data should leave the CLI
     */
    writeData(data: string): void;
    /**
     * Write a line of data (adds newline)
     */
    writeDataLine(data: string): void;
    /**
     * Log to stderr (progress, warnings, etc.)
     * Respects --quiet flag
     */
    log(message: string): void;
    /**
     * Log error to stderr (always, even with --quiet)
     */
    error(message: string): void;
    /**
     * Check if output is a TTY (for color decisions)
     */
    isTTY(): boolean;
}
//# sourceMappingURL=output.d.ts.map