If you aren't committing to an API or ABI then why are you even releasing with SemVar. If you are releasing a piece of software without a stable interface just release it with date as a version (ex: yyyy.mm.dd).
SemVar makes sense but every piece of software using it doesn't. Not every piece of software makes an interface commitment. Those that do should use SemVar, the rest should just use the date or some monotonically increasing number.