A simple server sided mod that adds a command to allow plan builds with friends from within a server without having to switch to a singleplayer world.

Works by creating a plan dimension for each player, of superflat and regular world type, each of which are on a different seed stopping players from using the mod to cheat. Completely server sided so works on vanilla servers where the players aren't required to use mods. Also lets players invite other players to there plan dimension to plan any possible build with them. The state of the player including position, health, hunger, inventory, armor, and any other player data gets saved and left behind for the survival world and seperate data is saved for the plan world. Also has various mod support and guardrails, some to mention include curios, ftb quests, create, etc. Also adds quality of life commands like /plan fill, /plan clear, /plan gamemode, /plan locate, etc. that the player can use without requiring op permissions. Any builds from the plan dimension save when the player leaves it or rejoins it. Also stops the player's stats from changing while in their plan dimension, and doesn't sync ender chests from the plan dimension to the main world.

Commands:

/plan create {superflat/regular} - teleports the player to their plan dimension of the set type.
/plan join {superflat/regular} - same as previous, teleports player to the selected type of world.
/plan invite {username} - invites the selected player to their plan dimension to work with them.
/plan accept - accepts the last sent invite to the player, the player can also simply click the accept button in chat.

Commands for inside your plan world:
/plan fill {location 1} {location two 2} {block} {optional: fill type} {optional: related block} - works the same as the /fill command but confined to the plan dimension, fills the blocks between the set coordinates.
/plan clear - clears the inventory or the person using it, doesn't work on other players.
/plan gamemode {gamemode} - sets the gamemode of the player using the command.
/plan locate {biome/poi/structure} {thing to locate} - finds the requested structure and gives the player the coordinates to it.

Plan