/**
 * A file name safe to paste, unquoted, into a stage command in any shell
 * (POSIX, PowerShell, cmd): letters and digits of any script and `._/@+-`
 * only.
 *
 * No quote of any kind, no separator and no substitution can ride in it.
 */
export const SAFE_PATHSPEC_PATTERN = /^[\p{L}\p{N}._/@+-]+$/u