What is the ruling regarding a husband telling his wife: "You will see, if I don't make you do this, you will be divorced," and then they reconcile and he says he did not intend divorce?

The phrase "you will be divorced" (or "you are divorced") can imply a conditional statement or a promise. Fulfilling a promise of divorce is neither obligatory nor recommended. Therefore, divorce is not binding as long as there is no intention of making the divorce conditional.