BETA for 1.21.5 NOW AVAILABLE!

GUI flickering in your modpack? Run this:
/coro config common set watut-server.toml dynamicGuiDontSendConstantGUIUpdates true

Can't see the new dynamic GUI in your modpack? Revert to original simple GUI:
/coro config common set watut-server.toml dynamicGuiUseOldSimpleGUIVisual true

What Are They Up To

See when a player is typing, in world and in GUI. The visual gets faster and wackier the faster you type!

See when a player is in a GUI such as inventory, chest, crafting, etc,

Shows their hand moving and clicking around at a screen in front of them

See when a player is idle for over 5 minutes.

Shows them fall asleep in world. Shows a Zz indicator in the tab player list:

See idle state in player list:

Notes:

Required on both the client and server.
Players inputting commands is hidden by default.
You cannot see the contents of others' inventories (and they can't see yours!)
Compatible with modded containers.
Currently only displays vanilla inventory screen (not modded GUIs).
You may use the mod in any modpack you like.

FAQ:

Backport? All planned backports are now complete, the priority will be updating to newer versions. We are unlikely to backport to 1.15 or earlier due to code complications.
Where is 1.18 Fabric? This one has an unusual bug to fix, but if we can get it working we will asap!
Update to version x? We are planning to update to as many versions as we can, watch this space!
Will future updates be for both Forge and Fabric? Yes! We want to keep updating both as much as possible.

Configs:

If you aren't comfortable with any of the stuff the client sends to the server, you can disable each feature as you please on the client side. Notifying idle states in chat is turned off by default.

Requirements:

What Are They Up To (Watut)