DimSync

Keeps your group together when someone changes dimension. If a player steps into the Nether, End, or any modded dimension, everyone else online gets pulled to that exact spot. No more losing someone because they walked through a portal first. Works with modded dimensions too by figuring out what dimensions exist on your server and remembering them. I made this mod specifically because of horror mods like untitled.log which teleport players but dont sync for everyone.

What it does

Someone changes dimension → everyone else teleports to their exact position, same block, same facing direction
Works for vanilla and modded dimensions alike
Keeps track of every dimension it's seen on your server (survives restarts)
Can be turned off/on with a command if you want to split up for a bit
Remembers everyone's Overworld position, so when the group comes back everyone lands where they actually were instead of getting bunched up
Anyone who wants out can toggle solo mode for themselves, no need to turn it off for everyone
Gives Resistance 10 for 15 seconds after a sync teleport so you dont die from fall damage or landing somewhere bad

Commands

/dimsync toggle - turn it on/off (op only)
/dimsync status - check if it's on, and how many dimensions it knows about
/dimsync list - see every dimension it's found so far
/dimsync solo - toggle for yourself, you wont get pulled along and you wont drag others along either

Requires

Fabric Loader
Fabric API
Minecraft 1.20.1

Notes

Everyone lands on the same exact block as whoever moved, it doesn't try to spread people out
If you're offline when the group moves, you just stay where you logged out
If you get pulled out of the Overworld and come back later, you return to your own original spot instead of wherever the person bringing everyone back landed
Solo mode and remembered positions are saved, so they survive a restart