/**
 * Install or update sync-ctl via cargo.
 *
 * Always uses --force when `force` is true so that an outdated version
 * is replaced with the latest from crates.io.
 *
 * After installation, cargo/bin is added to the current process PATH
 * so subsequent checks within the installer can find the binary.
 */
export declare function installSyncCtl(force?: boolean): Promise<boolean>;