Godot 4.x development: GDScript (static-typed) and C#/.NET, scene and node architecture, signals, custom Resources for data-driven design, physics (Jolt default since 4.6), input, UI, and export/CI pipelines. Use for ANY work involving Godot, GDScript, .tscn/.tres files, project.godot, Godot C#, or building/exporting Godot games and applications.