maven-jar-plugin defines Build-Jdk-Spec: xxx in META-INF/MANIFEST.MF, which helps a lot discovering the JDK used to build a .jar (and makes publishing generated buildspec or buildinfo to Maven Central not really useful: we have the info through Build-Jdk-Spec)
Takari Lifecycle currently does not store any hint, which makes guessing the JDK to use to check Reproducible Builds hard