/**
 * Returns true only when `appId` is a safe reverse-domain package identifier
 * that can be embedded in a shell command string without risk of injection.
 *
 * Valid examples:   com.example.app   io.capgo.app_1   com.acme.my-app
 * Invalid examples: com.x; rm -rf ~   com.x$(cmd)   nodots   com-example   foo_bar   ""
 */
export declare function isSafeAppIdForCommand(appId: string): boolean;