Just make sure he understands what commit policies we have on what branches (dead: <=2.4, 3.0, security-only: 2.5, 2.6, bug fixes only: 2.7, 3.1, new features: 3k)
Barry confirmed on IRC with this clarification (thanks):
stable is out, only some time after, when the last bugfix (i.e. micro) release is made;
there is another old stable version before this term.