There are 8 beds that respawn the corresponding prisoner via the squilly bed glitch. Most blocks visible to prisoners take more than 30 minutes to mine with Mining Fatigue, and guards check on the prisoners every 30 minutes. There are 7 floors that have various things for the prisoners to do. The guards control which floor the prisoner ends up in by opening and closing doors for the squilly bed glitch to move past, and then killing them. If a prisoner behaves badly, they end up in a solitary confinement cell, where the floor regenerates and they are surrounded by lava.
Outside Defence
In the nether there are 8 piglin bans; in the overworld there are 8 foxbans. These are surrounded by many layers of anvil walls to kill withers. The nether side is entirely area banned but the central ban will be turned off for visiting or imprisonment when the nether guard logs on. In the overworld there are many regenerating trap portals to try to further prevent portal escapes. Above the prison is a mining detector that will trigger an annoying alarm. There are multiple killchecks to prevent smuggling in items.
More Security
There is observed string at the top of the roof detector probably to prevent a private exploit. All permanent bans are protected by enough layers of crying obsidian that TNT minecarts cannot reach them.
