export declare const NABI_FILE_EXTENSION = ".nabi";
export interface NabiFileBody {
    readonly version: string;
    readonly body: unknown;
}
export declare const NABI_VERSION = "1.0.0";
export declare const NABI_FILE_VERSION: string;
export declare function writeNabiFile(body: unknown): string;
export declare function readNabiFile(text: string): unknown | null;
export declare function isNabiFile(file: {
    readonly name?: string;
}): boolean;
export declare function today(now?: Date): string;
export declare function defaultFileName(name?: string, now?: Date): string;
export interface NabiFileText {
    readonly name: string;
    readonly text: string;
    readonly mime?: string;
}
export interface FileStore {
    save(file: NabiFileText): void | PromiseLike<void>;
    open(signal?: AbortSignal): PromiseLike<NabiFileText | null>;
}
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