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Documentation Index

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COI Client is a client-side Minecraft Fabric mod that connects you to servers running the Circle of Imagination plugin. It delivers a rich in-game experience — bind up to 6 abilities to hotkeys, spin up an interactive ability wheel, watch cooldown timers on a configurable HUD, and see server-triggered visual effects render directly on your screen.

Installation

Install COI Client on Fabric with the required dependencies and get into a COI server in minutes.

Keybindings

Learn all default key assignments and how to remap them in Minecraft controls.

Ability System

Bind abilities to slots, manage cooldowns, and understand how the HUD displays your powers.

Server Integration

Integrate COI Client into your Paper plugin using the custom payload network protocol.

What’s inside

Ability Wheel

Quick-access radial menu supporting up to 16 ability slots.

HUD Configuration

Adjust position, scale, spacing, and display options from an in-game settings screen.

Visual Effects

10 server-triggered screen-space effects — vignette, heartbeat, cracks, glitch, and more.

Mythical Forms

20 procedurally-rendered creature transformation forms for pathway players.

Network Protocol

Full reference for all C→S and S→C custom payload channels.

Extend the Mod

Add your own visual effects and mythical creature forms to the mod.

Quick start

1

Install Fabric and dependencies

Download Fabric Loader and Fabric API for Minecraft 1.21.1+, then drop both JARs into your mods/ folder.
2

Add COI Client

Grab the latest coi-client-<version>.jar from the GitHub releases page and place it in mods/.
3

Join a COI server

Launch Minecraft with the Fabric profile. When you join a Circle of Imagination server, COI Client automatically requests your available abilities.
4

Bind your abilities

Press K to open the Ability Binding screen. Select abilities for each slot and save. Use Z–N to activate them or G to open the Ability Wheel.

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