Implement Svelte 5 runes-based reactivity in SvelteKit components.
npx skills add https://github.com/JasonWarrenUK/claude-code-config --skill svelte-ninja
Please help me install this Agent Skill. Skill: svelte-ninja Source: https://github.com/JasonWarrenUK/claude-code-config/tree/main/skills/svelte-ninja Command: npx skills add https://github.com/JasonWarrenUK/claude-code-config --skill svelte-ninja
The Svelte ninja skill helps developers implement Svelte 5 runes-based reactivity and scalable component patterns in SvelteKit projects, turning theory into practical UI code.
Create a small Svelte component that uses $state for a counter, derives a value with $derived, and uses $effect to log changes.
High-intent search queries and answers about installing and using this skill.
Svelte 5 runes provide explicit state management using $state for reactive variables, $derived for computed values, and $effect for side effects within SvelteKit components. This approach replaces implicit reactivity with explicit declarations for scalable UI design.
Reusable Svelte 5 components use $props for inputs and $state for internal management. Scalable component composition relies on slot patterns and explicit runes-driven reactivity to ensure predictable data flow and maintainable UI architecture.
The $derived rune computes reactive values automatically from $state dependencies. When underlying state changes, $derived recalculates synchronously, ensuring derived UI values stay updated without manual synchronization or stale data issues.
Svelte 5 runes apply directly to SvelteKit routing, data loading, and form actions. Runes manage reactive state within routes and enhance progressive enhancement patterns for robust, modern application development.
Use $effect for side effects like logging or DOM updates triggered by state changes, whereas $state holds reactive data. $effect runs when its dependencies change, separating side-effect logic from state declarations.
Implementing Svelte 5 runes requires understanding SvelteKit routing, data loading, and component composition. The patterns build upon foundational SvelteKit concepts to deliver scalable, reusable UI components with explicit reactivity.
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