ladder for the roost??? Poop board for under roost??? container for grit, container for crushed oyster shells? You have the nestboxes, feeder and waterer, cover for floor. Feed storage container/feed? One roost enough?
I also keep: scraper for poop on small hook on the wall; DE in a storage container so I have it handy when I need it; some mason jars with cracked corn, boss &other grains, raisins etc. for treats; a big flashlight; container with Stall-Dri or PDZ. I have space in the coop to keep a few metal cans with lids for feed, DE, PDZ so I have it handy when needed. Also have a couple of shelves for the mason jars and the flashlight. If I need the girls to come in the coop I just shake a mason jar with treats and they come running.....Don't know about your coop size/space. I also have a waterer and a roost for the run. I have a couple of hooks overhead so I can hang cabbage or lettuce when the weather is bad/winter for the girls to stay busy and also keep a couple of the suet feeders to stuff with greens or suet in the winter. My girls don't like snow much so they stay in a lot or just hang out in the covered run. Having something to peck on keeps them from getting bored and pecking on each other....I am lazy and hate running back t the garage to get stuff I need fairly often so I tend to keep enough in the coop to last for a couple of weeks. But I also only have a small flock of 6 and a good size converted shed as a coop...