CommandsMC mod

Opening the chat and typing a command brings up a compact tip card in the top-left corner. The card shows the syntax of the command being typed, along with a real example, so players can skip checking a wiki or memorizing arguments. The card updates with every keystroke and covers the full vanilla command set of 83 commands, from simple ones such as the item giver and teleport to more involved ones such as execute, scoreboard and data.

Once the command name is complete, the card highlights whichever argument sits under the text cursor and describes that part. After typing give followed by a space, for example, it shows what belongs in the item slot. Targets, coordinates, literals and optional arguments each get their own color, which keeps long commands readable at a glance. Prefixes and aliases are matched too, so w finds msg and tm finds teammsg.

The mod is a lightweight Fabric mod and runs on the client alone, so it can be used in single-player and on multiplayer servers without installing anything on the server side. It requires Fabric API and is published for Minecraft 1.21.9 – 1.21.11 under the MIT License. The code is not open source. The tip card can be turned off in-game with the F6 key while chat is open.