Playbooks

Punt Safe is a special teams set inside the Special formation, and it exists for one purpose: protecting against the fake punt and the return game instead of maximizing coverage downfield. Unlike standard Punt sets that send gunners and interior coverage men flying downfield the moment the ball is snapped, Punt Safe keeps defenders home, holds the edges, and prioritizes leverage over pressure. The personnel is your standard punt unit with the punter as the deep man, but the assignment logic is completely different from a base punt block or punt return look.
The alignment spreads coverage players wider and deeper than a normal punt formation, with the return men positioned to handle both a booming punt and a short pooch. Because defenders stay disciplined instead of crashing the line of scrimmage, Punt Safe is the answer when your opponent has shown a tendency to run fake punts on fourth and short, or when they line up with an unbalanced punt look that screams direct snap. You give up return yardage in exchange for eliminating the explosive play, which is the correct trade when you are protecting a lead.
Offensively there is nothing to unlock here. This is a fourth down defensive call, and the "concepts" it enables are situational: sniffing out the fake, keeping the punt from being downed inside your own ten because your returner is positioned properly, and forcing the opponent to actually punt the ball instead of stealing a drive. Treat it as a pre-snap insurance policy rather than a play you build a game plan around.
Call Punt Safe on fourth and one through fourth and four when the offense trots out the punt unit, since that is the down and distance window where fake punts actually get dialed up
Check the punt formation pre-snap: an unbalanced line, a wing shifted wide, or a personal protector aligned deeper than normal are the tells that justify staying safe
Use it late in the fourth quarter when you are protecting a lead and a single explosive return or converted fake changes the outcome of the game
If the opponent has never shown a fake, switch back to a standard punt return set and take the extra field position instead of playing scared
User the deep return man and drift toward the punter's plant foot direction to steal a few yards even out of a safe alignment