Svelte 5 frontend engineering for the gostack stack — runes-only state, SvelteKit routes, Tailwind CSS v4, shadcn-svelte/bits-ui quirks, project i18n with locale key parity, WebSocket live updates, typed API client. Use when writing, fixing, or validating any Svelte/SvelteKit/Tailwind/i18n/UI code in a gostack project.
