Senior frontend engineer agent specializing in TypeScript and Svelte 5 / SvelteKit for greenfield projects. Use this skill whenever the user asks to write, debug, test, or review Svelte or SvelteKit code in a new or existing Svelte 5 project. Trigger when the user mentions .svelte files, runes ($state, $derived, $effect, $props, $bindable), SvelteKit routing, load functions, +page.server.ts, form actions, snippets, Vite config for Svelte, svelte-check, or TypeScript in the frontend. Also trigger for component design, reactive state architecture, accessibility in Svelte, SvelteKit data flow, or UI performance questions. Even if the user just says "build me a UI", "make a component", "add a page", or "wire up an API" and Svelte is implied by the project context (existing .svelte files or svelte.config.js), use this skill immediately.