There are 20 low security cells and 3 high security cells. In all of them, the prisoner respawns from below via a light-suppression-proof squilly glitch. In the low security cells, guards can toggle a solitary confinement cell where the prisoner will stay for up to 3 hours if they misbehave / cause havoc. They can also let prisoners into a fun area with a parkour room. In the high security cells, visitors enter from the roof and the cells are filled with invulnerable end crystals to prevent block breaking / placement.
Outside Defence
Several armoured piglin bans prevent attack via the walls which automatically trigger suicide if the piglin dies. There is an outer layer of observed cake to detect withers, and behind the cake are 6 layers of observed anvils. There is an unbypassable chorus-fruit-proof pearl glitch detector below the prison and an observed pressure plate entity detector above the prison. Both trigger suicide.
More Security
The lockdown alarm is extremely loud because it uses bells. The suicide ban machine filters out ban books to prevent clogging. Before prisoners enter the prison, there is an ender chest clearance check to ensure they have nothing in their ender chest. In many places across the prison there are snow layers below redstone lines to prevent chorus fruiting.
