Site Protection

Site Protection

A building site is not a no-go zone. Only what the builder still needs is protected.

What is locked when

State	What is locked
Planning is running (also while editing a finished plan)	the entire site, for everyone
Plan finished, build running or waiting	only the positions the builder still has to place or clear, plus the tool chest

Everything else inside the site behaves like the normal world. Doors, fence gates, trapdoors, buttons, levers, chests and furnaces work, and you can place and break blocks there normally in survival. While the builder digs out the cellar, you can keep building on the house above it – only his open to-do list is off limits, because a block there would either be built over or stop the build.

Whatever the builder has finished belongs to you again: finished walls can be decorated, rebuilt and torn down, and an explosion gets through there just like everywhere else.

If you want a site to be untouchable from the first click to the last, set protectEntireSite to true (see Configuration). Then the whole footprint – over the full world height – is locked for everyone, including the owner, as long as the project runs.

What the protection covers

A central guard rejects every block change at a protected position. This covers in one place:

• players,
• explosions,
• fire,
• fluids,
• falling blocks,
• mob griefing,
• other mods.

Pistons refuse to push or pull a structure that touches a protected position.

Anti-duplication

Expanded Building is designed so that planning in Creative can never be turned into real items:

• The inventory backup is written to disk before Creative is enabled, and is restored after a crash.
• Temporary Creative contents are discarded when planning ends.
• Creative drops and Q / Ctrl+Q drops are blocked on the server.
• Entity interactions, attacks and normal item use are blocked in planning mode.
• Containers cannot be used during planning; filled storage (including storage from other mods) cannot be broken.
• Items that drop inside the site during planning are collected and discarded.
• Block data (sign text, machine settings, storage contents) is restored together with the block when the site is reset – also after a crash, through the planning journal.
• Blueprints never contain block data, so they cannot be used to copy items.
• Multi-block structures are checked as a group before material is taken: a door whose upper half is blocked does not consume a door item.
• Material deposits and refunds run through a persistent journal in the player data. Refunds never create ground drops; anything that does not fit waits until there is space.
• Changing dimension during planning ends planning safely and restores inventory and world.