By aimuzov
Claude Code skill for writing idiomatic Svelte v4 components. Guards against accidental Svelte 5 runes and snippets; covers reactivity, stores, lifecycle, directives, transitions, motion, and a11y.
A Claude Code plugin that installs a Svelte v4 expert skill into your assistant.
Svelte 5 introduced runes ($state, $derived, $effect, $props) and snippets ({#snippet}, {@render}). These are not valid in Svelte v4 — but Claude tends to emit them by default on any .svelte file. This plugin fixes that by teaching Claude the v4 idioms (export let, $:, <slot>, createEventDispatcher, stores) and explicitly forbidding v5-only syntax.
A single skill — svelte-v4 — organized as an entry point plus focused reference files that Claude loads on demand:
| File | Covers |
|---|---|
skills/svelte-v4/SKILL.md | Entry point: triggers, version detection, hard DON'Ts, cheat-sheet |
references/component.md | Component anatomy, props, events, slots, bindings, TypeScript, client API |
references/reactivity.md | $: labels, stores (writable/readable/derived), pitfalls |
references/lifecycle.md | onMount, onDestroy, beforeUpdate, afterUpdate, tick, context |
references/template.md | Control flow, directives, special elements, actions, transitions |
references/motion.md | svelte/motion (tweened, spring) and svelte/easing |
references/accessibility.md | All a11y-* compile warnings + fix patterns |
In Claude Code:
/plugin marketplace add aimuzov/claude-svelte-v4
/plugin install svelte-v4@aimuzov-claude-svelte-v4
Or from a local clone:
/plugin marketplace add /path/to/claude-svelte-v4
/plugin install svelte-v4@aimuzov-claude-svelte-v4
That's it — the skill activates automatically the next time you open a .svelte file in a project where package.json lists svelte@^4.
Claude reads each skill's description and decides when to use it. svelte-v4 triggers on:
.svelte and package.json contains "svelte": "^4" / "~4.x" / "4.x.y".export let, $:, <slot>).And it explicitly skips when it detects Svelte 5 markers ($state, $derived, {#snippet}, …) so it won't interfere with v5 projects.
/plugin uninstall svelte-v4@aimuzov-claude-svelte-v4
/plugin marketplace remove aimuzov-claude-svelte-v4
PRs are welcome — especially corrections spotted against the official Svelte v4 docs. Keep the skill focused on core runtime and template syntax only; SvelteKit is deliberately out of scope.
MIT — Aleksey Imuzov
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