If your issue is with the format and the contract that semver enforces, then you can easily number your builds <jenkins build number>.0.0 That's valid semver, i

If your issue is with the format and the contract that semver enforces, then you can easily number your builds <jenkins build number>.0.0 That's valid semver, it follows the contract. Major versions may break compatibility or may not. There's no contract that enforces that non-breaking changes can only go into minor or patch releases. The only baggage you'll be carrying around will the the two trailing zeroes. You're unlikely to run out of available major version numbers any time soon.