That should work reasonably reliably, and is essentially what TFA describes as the behavior of 'unzip'. But it then goes on to say, "The zip file spec does not

That should work reasonably reliably, and is essentially what TFA describes as the behavior of 'unzip'. But it then goes on to say, "The zip file spec does not allow this arbitrary data [at the end of a zipfile], so unzip is non-conformantly tolerating this data." So I think what you missed is pedantry. :)