/**
 * Base error class for all Story Diff errors.
 */
export declare class StoryDiffError extends Error {
    constructor(message: string);
}
/**
 * Thrown when StoryDiff is used before calling setup().
 */
export declare class NotInitializedError extends StoryDiffError {
    constructor();
}
/**
 * Thrown when an unknown viewport name is used.
 */
export declare class ViewportNotFoundError extends StoryDiffError {
    constructor(viewport: string, available: string[]);
}
/**
 * Thrown when images have different dimensions and allowSizeMismatch is false.
 */
export declare class SizeMismatchError extends StoryDiffError {
    constructor(actualWidth: number, actualHeight: number, expectedWidth: number, expectedHeight: number);
}
/**
 * Thrown when a visual regression is detected.
 */
export declare class VisualRegressionError extends StoryDiffError {
    readonly snapshotName: string;
    readonly diffPercentage: number;
    readonly diffPixels: number;
    readonly snapshotPath: string;
    readonly diffPath: string | null;
    constructor(snapshotName: string, diffPercentage: number, diffPixels: number, snapshotPath: string, diffPath: string | null);
}
/**
 * Thrown when a baseline image is missing and failOnMissingBaseline is true.
 */
export declare class BaselineMissingError extends StoryDiffError {
    readonly snapshotName: string;
    readonly snapshotPath: string;
    constructor(snapshotName: string, snapshotPath: string);
}
/**
 * Thrown when Storybook cannot be reached or fails to load.
 */
export declare class StorybookConnectionError extends StoryDiffError {
    constructor(url: string, detail?: string);
}
/**
 * Thrown when StoryDiff cannot find a root configuration file.
 */
export declare class ConfigNotFoundError extends StoryDiffError {
    constructor(fileNames: readonly string[]);
}
/**
 * Thrown when a discovered configuration file cannot be parsed or normalised.
 */
export declare class InvalidConfigError extends StoryDiffError {
    constructor(filePath: string, detail: string);
}
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