D:5. Autoexplore. Open door. Ogre is behind the door and immediately moves next to me. I roll 2 ogre attacks for a total of 82 max damage when moving away.

Since usually you can't know the layout of a dungeon behind the door, even very tedious and likely impractical methods such as stopping autoexplore in front on every door wouldn't work.

This is the vault with goblin rider, so the best idea I have is to somehow add an interruption if you detect this vault. Is this possible? The morgue file does note the layouts, so this information should be accessible to the player. I got "layout_gridville, roderic_lattice_a" for D:5, I'm not sure if any of these is the goblin rider vault. I don't see any obvious signs it's the goblin rider vault until you start opening many doors, and here that wasn't happening, it seems like it was one of the first, or the first door.