export declare const readTextFile: (path: string) => Promise<string>;
export declare const readJsonFile: (path: string) => Promise<unknown>;
export declare const writeTextFile: (path: string, contents: string) => Promise<string>;
/** One trailing newline, so written documents behave in a diff and in a shell. */
export declare const writeJsonFile: (path: string, value: unknown) => Promise<string>;
/**
 * A file that holds a secret and nothing else can rebuild: readable by its
 * owner alone, and replaced in one step so an interrupted write leaves the
 * old copy rather than half of a new one.
 */
export declare const secretStagingPath: (path: string) => string;
export declare const writeSecretJsonFile: (path: string, value: unknown) => Promise<string>;
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