Scene Validator

A Godot 4 editor plugin that scans the currently open scene for common mistakes before they turn into runtime errors:

• Broken NodePath references — exported or stored NodePath properties that no longer resolve to a node.
• Unset @export values — exported Node/Resource/PackedScene properties left null, the classic "Nil doesn't have method" crash.
• Orphaned signal connections — connections in the scene file that target a method on a script that was removed, renamed, or detached.
• Ownerless nodes — nodes with no owner set, which are silently dropped the next time the scene is saved.

Results show up in a dockable Scene Validator panel at the bottom of the editor, with a button on each row to jump straight to the offending node in the Scene dock.

Installation

1. Copy addons/scene_validator/ into your project's addons/ folder.
2. In Godot: Project → Project Settings → Plugins, enable Scene Validator.
3. Open the Scene Validator tab in the bottom panel.

Usage

• Click Validate Scene to scan the currently open scene on demand.
• Check Run on Scene Save to have it re-scan automatically every time you save a scene.
• Click the button next to any result row to select that node in the editor.

How it works

All scanning logic lives in scene_validator.gd, a plain RefCounted script with no editor dependencies — it walks the live scene tree with get_property_list(), get_incoming_connections(), and owner checks. The EditorPlugin (plugin.gd) only wires that logic to the dock UI (validator_panel.gd / .tscn) and to the resource_saved signal for the optional on-save trigger.

License

MIT — see LICENSE.