What problem does it solve? Building Unity UI Toolkit interfaces requires coordinating USS stylesheets, UXML layout files, PanelSettings assets, and UIDocument scene components, and mistakes like unsupported CSS properties or wrong binding attributes silently break asset imports. This Skill provides structured operations for every step of that workflow with guardrails against common errors. ## Core Features & Use Cases - USS/UXML Authoring: Create, read, write, and batch-generate USS stylesheets and UXML layouts, add or remove elements and style rules, and generate paired starter templates (menu, HUD, dialog, inventory, and more). - Scene Integration: Create UIDocument GameObjects, configure PanelSettings with scale modes and reference resolutions, and inspect live VisualElement trees in the scene. - Unity 6 Features: Declare runtime data bindings in UXML, create world-space UI panels, and run UXML upgraders, with version-gated checks that report required Unity versions instead of failing opaquely. - Use Case: A developer needs a game HUD. They create a PanelSettings asset with ScaleWithScreenSize, generate a USS file with design tokens, build the UXML layout, and attach it to the scene via a UIDocument — all through guided skill calls. ## Quick Start Ask the AI to create a Unity UI Toolkit HUD with a PanelSettings asset, a USS stylesheet, a UXML layout, and a UIDocument attached to the scene.