The spec is the commonmark spec together with extensions of the type the commonmark spec was devised to make possible. People know better than to leave such a 'language' with a 'spec' that only really resides in a perl program, of all things. There are lists upon lists upon lists of corner cases the the perl does differently from every other program that, in the first years, reimplemented it. All of them show the perl does not meet the intention.