Word of God

>And the essence of permanence sounds useful. Since it seems to just make objects not care about Dungeon Rules, does it mean that she could use permanenced objects to completely close off corridors?

Nope.

Think of it this way: A dungeon is basically a reality bubble. It constantly rebuilds itself based on a "model" of what it should be like. What Taylor is doing when she's adding things is modifying this model, which in turn changes the bubble. Essence of permanence basically makes it so the object is glossed over by this effect, so soulless objects from the surface--whose mana is foreign to the dungeon--are not destroyed.

The rules of the system work differently. They are enforced; it's like the system is poking its head into the model, checking that everything is fine, and if it isn't, rectifying the problem and slapping the offending dungeon on the wrist. Fortunately, the rule system is an unthinking and automatic thing, otherwise I imagine it would be quite cross with Taylor right now.

—Source: https://forums.spacebattles.com/threads/i-woke-up-as-a-dungeon-now-what-dungeon-worm.620521/post-67466260
—Archive: https://web.archive.org/web/20220625231518/https://forums.spacebattles.com/threads/i-woke-up-as-a-dungeon-now-what-dungeon-worm.620521/page-504?post=67466260#post-67466260