Svelte Runes Skill for Claude

Svelte runes guidance. Use for reactive state, props, effects, attachments, or migration. Covers $state, $derived, $effect, @attach. Prevents reactivity mistakes.

13k tokens

context cost

the whole folder, loaded on every use

files

instructions only

copies elsewhere

how many repositories repackaged it

217

stars on the repo

on the repository, not the skill itself

Install

one command, takes just this skill from the repository

npx skills add https://github.com/spences10/svelte-claude-skills --skill svelte-runes

The instruction itself

5 sections, as written by the author

Svelte Runes

Quick Start

Which rune? Props: $props() | Bindable: $bindable() |

Computed: $derived() | Side effect: $effect() | State: $state()

Key rules: Runes are top-level only. $derived can be overridden

(use const for read-only). Don't mix Svelte 4/5 syntax.

Objects/arrays are deeply reactive by default.

Example

<script>
	let count = $state(0); // Mutable state
	const doubled = $derived(count * 2); // Computed (const = read-only)

	$effect(() => {
		console.log(`Count is ${count}`); // Side effect
	});
</script>

<button onclick={() => count++}>
	{count} (doubled: {doubled})
</button>

Reference Files

reactivity-patterns.md - When

to use each rune

migration-gotchas.md - Svelte 4→5

translation

component-api.md - $props, $bindable

patterns

snippets-vs-slots.md - New

snippet syntax

common-mistakes.md - Anti-patterns

with fixes

attachments.md - @attach replaces use:

actions

Notes

Use onclick not on:click, {@render children()} in layouts
$derived can be reassigned (5.25+) - use const for read-only
Last verified: 2025-01-11

<!--

PROGRESSIVE DISCLOSURE GUIDELINES:

Keep this file ~50 lines total (max ~150 lines)
Use 1-2 code blocks only (recommend 1)
Keep description <200 chars for Level 1 efficiency
Move detailed docs to references/ for Level 3 loading
This is Level 2 - quick reference ONLY, not a manual

LLM WORKFLOW (when editing this file):

Write/edit SKILL.md
Format (if formatter available)
Run: claude-skills-cli validate <path>
If multi-line description warning: run claude-skills-cli doctor <path>
Validate again to confirm

-->

Other skills for the same job

different authors, same section of the catalogue

Protocolsio Integration

by christophacham

×4

Integration with protocols.io API for managing scientific protocols. This skill should be used when working with protocols.io to search, create, update, or publish protocols; manage protocol steps and materials; handle discussions and comments; organize workspaces; upload and manage files; or integrate protocols.io functionality into workflows. Applicable for protocol discovery, collaborative protocol development, experiment tracking, lab protocol management, and scientific documentation.

16k tokens

Tailored Resume Generator

by frostant

×4

Analyzes job descriptions and generates tailored resumes that highlight relevant experience, skills, and achievements to maximize interview chances

3k tokens

Excalidraw Diagram Generator

by github

vendor ×3

Generate Excalidraw diagrams from natural language descriptions. Use when asked to "create a diagram", "make a flowchart", "visualize a process", "draw a system architecture", "create a mind map", or "generate an Excalidraw file". Supports flowcharts, relationship diagrams, mind maps, and system architecture diagrams. Outputs .excalidraw JSON files that can be opened directly in Excalidraw.

Build and distribute Expo development clients locally or via TestFlight

Use when you have a written implementation plan to execute in a separate session with review checkpoints

Data structure for annotated matrices in single-cell analysis. Use when working with .h5ad files or integrating with the scverse ecosystem. This is the data format skill—for analysis workflows use scanpy; for probabilistic models use scvi-tools; for population-scale queries use cellxgene-census.

16k tokens

Benchling Integration

by christophacham

×3

Benchling R&D platform integration. Access registry (DNA, proteins), inventory, ELN entries, workflows via API, build Benchling Apps, query Data Warehouse, for lab data management automation.

Comprehensive molecular biology toolkit. Use for sequence manipulation, file parsing (FASTA/GenBank/PDB), phylogenetics, and programmatic NCBI/PubMed access (Bio.Entrez). Best for batch processing, custom bioinformatics pipelines, BLAST automation. For quick lookups use gget; for multi-service integration use bioservices.

24k tokens

How to use it

Copy the folder

Take spences10/svelte-runes from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.