From antigravity-awesome-skills
Guides migrating Godot 3.x projects to Godot 4, covering GDScript 2.0 syntax changes, annotations, the new Tween system, and export updates.
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A critical guide for developers transitioning from Godot 3.x to Godot 4. This skill focuses on the major syntax changes in GDScript 2.0, the new `Tween` system, and `export` annotation updates.
A critical guide for developers transitioning from Godot 3.x to Godot 4. This skill focuses on the major syntax changes in GDScript 2.0, the new Tween system, and export annotation updates.
Tween node vs create_tween).export variables to @export annotations.@)Godot 4 uses @ for keywords that modify behavior.
export var x -> @export var xonready var y -> @onready var ytool -> @tool (at top of file)Properties now define setters/getters inline.
Godot 3:
var health setget set_health, get_health
func set_health(value):
health = value
Godot 4:
var health: int:
set(value):
health = value
emit_signal("health_changed", health)
get:
return health
The Tween node is deprecated. Use create_tween() in code.
Godot 3:
$Tween.interpolate_property(...)
$Tween.start()
Godot 4:
var tween = create_tween()
tween.tween_property($Sprite, "position", Vector2(100, 100), 1.0)
tween.parallel().tween_property($Sprite, "modulate:a", 0.0, 1.0)
String-based connections are discouraged. Use callables.
Godot 3:
connect("pressed", self, "_on_pressed")
Godot 4:
pressed.connect(_on_pressed)
GDScript 2.0 supports typed arrays for better performance and type safety.
# Godot 3
var enemies = []
# Godot 4
var enemies: Array[Node] = []
func _ready():
for child in get_children():
if child is Enemy:
enemies.append(child)
yield is replaced by await.
Godot 3:
yield(get_tree().create_timer(1.0), "timeout")
Godot 4:
await get_tree().create_timer(1.0).timeout
@export_range, @export_file, etc., for better inspector UI.var x: int) for performance gains in GDScript 2.0.super() to call parent methods instead of .function_name().emit_signal("name")) if you can use the signal object (name.emit()).Problem: "Identifier 'Tween' is not a valid type."
Solution: Tween is now SceneTreeTween or just an object returned by create_tween(). You rarely type it explicitly, just use var tween = create_tween().
npx claudepluginhub sickn33/antigravity-awesome-skills --plugin antigravity-bundle-aas-mobile-app-builderGuides migration of Godot 3.x projects to Godot 4, covering GDScript 2.0 syntax changes, Tween system updates, signal connections, typed arrays, await coroutines, and @export annotations. Use for porting or fixing upgrade errors.
Generates idiomatic Godot 4.x GDScript code with type hints, annotations, signals, and patterns for CharacterBody2D/3D movement and state machines.
Provides Godot 4 GDScript patterns for architecture, signals, scenes, state machines, and optimization. Useful for building games, game systems, and best practices.