Godot 4, from the code that shipped

Write-ups on the systems behind the SELOdev Godot tools. Each post is drawn from a working system and leaves you able to build a rough version yourself.

• Drag and drop inventory UI in Godot 4 — Godot 4 hands you three drag-and-drop callbacks and no opinion about what a drop means. Here is how to build inventory slots on top of a real stacking inventory, where a partial merge and a clean rejection both fall out of one method call, and the item never mutates behind your back.