Land protection

A build is checked against land protection before money changes hands, while the preview is open, and again every few seconds while it builds. A player can only build what they could have built by hand.

Providers

Each provider is on only when its plugin is installed and its switch under protection.providers is true. A protection plugin that enables after uxmBuilders is picked up when it loads. /builders admin protection lists what is active.

How a box is checked

Providers are asked about a grid of points covering the footprint: at least edgeSampling subdivisions per edge, never more than 8 blocks apart, on the floor, the ceiling and the layers in between. GriefPrevention is also asked about every claim whose rectangle touches the footprint, so a claim smaller than the grid cannot slip between two points.

A provider that finds no claim or region anywhere in the box answers "not applicable" rather than "allowed", so in PERMISSIVE mode wilderness on one plugin does not override a claim on another.

The generic fallback

bukkitEvent covers Lands, Residence, RedProtect, GriefDefender, BentoBox, SuperiorSkyblock2 and anything else: it fires a fake block-place event at the sample points and reads whether a plugin cancelled it. It is off by default, because other plugins' listeners run too: a logging plugin records the probe, an anti-cheat may react.

When the land changes hands

With protection.cancelIfLost: true, every recheckIntervalTicks the site is checked again for its owner. If the owner lost the right to build there, the job is cancelled and refunds the unbuilt share of the price, with no cancel penalty. A plugin listening to the cancel event can change the refund but cannot keep the build going.

The recheck needs the owner online, so the same switch also pauses a build while its owner is offline and resumes it when they return.

Settings

Your own plugin can add a provider through the developer API.

Related: Placement rules, Restarts and refunds