export declare class NoahError extends Error {
    readonly code: string;
    readonly details?: unknown;
    constructor(message: string, code?: string, details?: unknown);
}
export declare class ValidationError extends NoahError {
    constructor(message: string, details?: unknown);
}
export declare class RegistryError extends NoahError {
    constructor(message: string, details?: unknown);
}
export declare class NotFoundError extends NoahError {
    constructor(message: string, details?: unknown);
}
export declare class ConflictError extends NoahError {
    constructor(message: string, details?: unknown);
}
export declare class MetadataError extends NoahError {
    constructor(message: string, details?: unknown);
}
export declare function isNoahError(error: unknown): error is NoahError;
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