React-style reactive UI for Godot 4, in plain GDScript: function components, hooks (useState/useEffect/useMemo/…), a fiber reconciler with keyed reconciliation and bailouts, a router, typed styling, and the .guitkx JSX-like markup language with an editor plugin that compiles it to plain .gd, hot-reloads running games (Fast Refresh with hook-state preservation), and ships VS Code tooling. Docs: see the repository README.

AI disclosure: developed with AI assistance (Anthropic's Claude) under human direction — design decisions, field testing, and review are human-driven.