Decentraland Godot Explorer — UI Componentization

This skill is the source of truth for where new UI files go and how to refactor existing UI in godot/src/ui/. It exists because the team adopted an Atomic Design layout in PR #2021 (issue #1876) and reviews now enforce it.

If you are creating a new UI screen, button, dialog, list item, panel, modal, toast, or anything that touches godot/src/ui/ — read this first.

The structure