Godot Signals & Groups (4.x)

Decouple nodes with the observer pattern (signals) and act on many nodes at once (groups), instead of hard-coding references between scenes. Targets Godot 4.3+.

When to use

• Use when a node needs to tell others "something happened" (player died, item picked up, wave cleared) without holding direct references to them.
• Use when you need to address a whole category of nodes at once ("pause all enemies", "save every checkpoint").

When not to use: raw signal syntax basics → godot-gdscript; scene structure and instancing → godot-nodes-scenes. For cross-scene global events, emit from an autoload (see godot-nodes-scenes).

Core workflow