Good thinking. I think chili powder is one of those spices that loses some potency over time, but I bet you roll through a couple of those at least each fall/winter :) And thanks for the tip about cocoa powder, I'll try to remember that next time I make a chili.
Seeds, especially for herbs that don't need much gardening attention, is a good call too. I assume you have a lot of salt stockpiled too.
Most all food stuff will loose strength over the long haul,so just st use a little more. I cook to taste anyway, and intend to refill these with home grown later anyway.
I will have herbs for cook...and medicine growing in protected locations, to keep the deer from stripping my plants.
I have a lot of salt stockpiled for barter too, but the salt flats that wagon trains used to stop here to restock their salt supplies is close by.
Be safe, and ready!
🤠😁❤️