# Event Bus

Use when implementing decoupled communication between nodes, global EventBus autoload...

- Repository: https://github.com/jame581/GodotPrompter (914 stars)
- Category: Engineering
- License: MIT
- Last updated: 2026-11-01
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add jame581/GodotPrompter --skill event-bus -g -a claude-code -y`
Codex: `npx skills add jame581/GodotPrompter --skill event-bus -g -a codex -y`
Cursor: `npx skills add jame581/GodotPrompter --skill event-bus -g -a cursor -y`
Gemini CLI: `npx skills add jame581/GodotPrompter --skill event-bus -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add jame581/GodotPrompter`

## Description

Use when implementing decoupled communication between nodes, global EventBus autoload with typed signals

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Event Bus in Godot 4.3+

A global signal hub that lets unrelated nodes communicate without holding references to each other. All examples target Godot 4.3+ with no deprecated APIs.

> **Related skills:** **component-system** for direct signal communication between components, **csharp-signals** for C#-specific signal patterns, **dependency-injection** for alternative decoupling approaches, **ability-system** for an EventBus usage example with ability events.

---

## 1. What is an Event Bus

An EventBus is a singleton autoload that acts as a central registry for signals. Instead of nodes connecting directly to each other, every node connects to (or emits on) the shared EventBus. This removes the need for one node to hold a reference to another.

```
Without EventBus             With EventBus
──────────────               ──────────────────────────
NodeA ──signal──► NodeB      NodeA ──emit──► EventBus ──signal──► NodeB
                                                       ──signal──► NodeC
                                                       ──signal──► NodeD
```

**Flow diagram**

```
┌─────────┐   emit(player_died)   ┌───────────┐   player_died   ┌──────────┐
│  NodeA  │ ────────────────────► │ EventBus  │ ───────────────► │  NodeB   │
│(Player) │                       │(Autoload) │                  │   (UI)   │
└─────────┘                       └───────────┘ ───────────────► └──────────┘
                                                  player_died    ┌──────────┐
                                                                 │  NodeC   │
                                                                 │(AudioMgr)│
                                                                 └──────────┘
```

NodeA emits the signal. NodeB and NodeC each connected to EventBus independently. Neither knows the other exists.

---

## 2. When to Use vs Direct Signals

The rest: https://github.com/jame581/GodotPrompter/blob/HEAD/skills/event-bus/SKILL.md