/** The filesystem calls an atomic write needs. */
export interface AtomicWriteIo {
    writeFile(path: string, data: string): Promise<unknown>;
    rename(from: string, to: string): Promise<unknown>;
    unlink(path: string): Promise<unknown>;
}
/**
 * Write `data` to `path` via a temporary sibling and a POSIX rename, so a
 * crash mid-write never leaves a partially-written file at `path`. The
 * temporary file is removed when the rename fails.
 */
export declare function writeFileAtomicWith(io: AtomicWriteIo, path: string, data: string): Promise<void>;
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