Personal Borders

Fabric mod that adds player-specific world borders using LuckPerms permissions.
Two players with different borders

Separate world borders for each player and each dimension
Prevent players, players' projectiles, and players' pets from crossing the border
Updated in real-time when permissions are changed

Personal Borders looks for next four permission nodes in LuckPerms:

personal-borders: default world border, if dimension-specific border is not set
personal-borders.overworld: overworld border
personal-borders.the_nether: nether border
personal-borders.the_end: end border

Parameters of the border are stored in the permission node as context values that are similar to Vanilla world border command:

center.x, center.z: coordinates of the border center
distance: size of the border (diameter)
warning.distance: distance from the border at which the player's screen starts to tint red
damage.amount: damage dealt to the player per second per block when outside the border
damage.buffer: distance from the border at which the player starts taking damage

Example: Example of LuckPerms settings