/godot-version-migration

Migration notes: godot-project-templates

Incremental upgrade for topics this skill covers. Apply one hop, stabilize/test, then next. Never skip hops.

If the project is < 4.0, follow godot-version-migration era bridges (legacy → 3→4) until 4.0, then these hops. Official 3→4: Upgrading from Godot 3 to Godot 4.

4.0 → 4.1

Official: Upgrading to Godot 4.1

• Object.get_meta_list return type is Array[StringName] (was PackedStringArray).
• WorkerThreadPool.wait_for_task_completion now returns Error.

4.1 → 4.2

Official: Upgrading to Godot 4.2

• NOTIFICATION_NODE_RECACHE_REQUESTED removed from Node.

4.2 → 4.3

Official: Upgrading to Godot 4.3

• Binary serialization of scripted Objects/typed Arrays changed — re-test template Resource round-trips.
• PackedByteArray may use compact base64 storage; older editors may not open 4.3 resources with large byte arrays.

4.3 → 4.4

Official: Upgrading to Godot 4.4

• @export_file stores uid:// paths from the Inspector (breaking vs res:// expectations).
• FileAccess.store_* methods return bool success.

4.4 → 4.5

Official: Upgrading to Godot 4.5

• Resource.duplicate(true) deep-duplicates only internal resources; use duplicate_deep(DEEP_DUPLICATE_ALL) for old behavior.
• ProjectSettings.add_property_info warns on invalid/usage keys.

4.5 → 4.6

Official: Upgrading to Godot 4.6

• TSCN gains unique node IDs (large VCS diffs on first 4.6 save — expected for scaffold scenes).
• New project defaults: D3D12 on Windows; Jolt for 3D physics — document in FPS/3D template rows.
• MeshInstance3D.skeleton default is empty NodePath — enable compatibility setting if old parent-skeleton behavior needed.

4.6 → 4.7

Official: Upgrading to Godot 4.7

• New projects default stretch mode canvas_items (was disabled); aspect expand (was keep) — override in template bootstrap if legacy behavior is required.
• Asset Store replaces Asset Library naming in the editor.
• Sky reflection roughness_layers default restored toward 8.
• Object.is_class takes StringName.
• Setting an element of a packed array property no longer calls the property setter for the whole array.
• Overrides of methods with typed returns must actually return (add return null if needed).