On the topic of autodoors, we're in a hot, dry location so I don't have a coop as such, I've been calling it a henhouse. It's got a solid back wall (mini orb but I'm not sure what it's called elsewhere in the world), the side walls are about an arm length mini orb and two arm lengths' galvanised mesh, the front wall is all mesh with a human-sized door, there's a mini orb roof over rhe top, and a mesh floor to keep predators out. I attached the floor to the coop with strong gauge wire using the lock-wire pliers.
So the door situation is manual at present.
But for the new henhouse, I'm planning to use an auto door thingy to lower the ramp into the raised roosting box in the mornings to let the hens come down and raise the ramp at nighttime because I'm thinking of keeping mice and rats out while the hens are sleeping.
I think I'll get a solar-powered one that has a manual timer I can adjust each week.
The fancy new henhouse will have a run built in and the whole thing will be rooved to prevent flying predators and I'll pave a path all the way around the perimeter to prevent digging predators.
Even though it's going to be a very spacious and comfy environment, I'll of course allow the hens out to rumnage around the garden if I'm home to ensure their safety.
So far it's just a dream, but I hope to make progress on it later this year or 2021.