/**
 * Spinner and progress utilities for CLI
 * Hand-rolled for minimal dependencies
 */
import type { Colors } from './colors.js';
/**
 * Simple terminal spinner for progress indication
 * Only shows when stderr is a TTY
 */
export declare class Spinner {
    private readonly colors;
    private readonly quiet;
    private readonly isTTY;
    private message;
    private frameIndex;
    private timer;
    constructor(colors: Colors, quiet: boolean);
    /**
     * Start the spinner with a message
     */
    start(message: string): void;
    /**
     * Update the spinner message
     */
    update(message: string): void;
    /**
     * Stop spinner with success message
     */
    success(message: string): void;
    /**
     * Stop spinner with error message
     */
    fail(message: string): void;
    /**
     * Stop spinner with warning message
     */
    warn(message: string): void;
    /**
     * Stop the spinner without a message
     */
    stop(): void;
    private render;
}
/**
 * Format a number with thousands separators
 */
export declare function formatNumber(n: number): string;
/**
 * Format a duration in seconds
 */
export declare function formatDuration(seconds: number): string;
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