If I remember Jerry bragged about signing all the new assistant coaches to multi-year deals. I'm guessing this means they all likely signed the standard two-year deals for assistant coaches. If true, Richard is probably signed through 2019 season. The only way he leaves is HCing job. No way in hell Jerry will let him interview for anything less ( see Bill Callahan ).
As to OP question.......said this in another thread, IMO the Saints win could be the seed to a Garrett extension. I'm 100% confidence if we make the playoffs and win at least one postseason game, Jerry will quietly extend Jason a few more years during the offseason.