Can it help with SvelteKit SSR hydration issues?

Absolutely. It provides specific strategies for handling hydration mismatches and correctly guarding browser-only APIs like localStorage during server-side rendering.

What debugging tools does this skill leverage?

It guides users through Svelte's native $inspect() rune, {@debug} tags, svelte-check CLI diagnostics, and Vite's verbose logging modes.

Does this skill support Svelte 5 runes?

Yes, it includes comprehensive patterns for Svelte 5 runes like $state, $derived, and $effect, including guidance on deep reactivity and avoiding infinite loops.

How does it help with infinite update loops?

It identifies circular dependencies in $derived and $effect runes and suggests the correct use of untrack() to break dependency chains.

Svelte Debugging & Optimization

Name: Svelte Debugging & Optimization
Author: SnakeO

bySnakeO

0•

Security & Testing

Diagnoses and resolves Svelte reactivity issues, hydration mismatches, and state management errors using systematic debugging patterns.

This skill provides a comprehensive framework for troubleshooting Svelte applications, spanning from legacy Svelte 4 store patterns to the modern Svelte 5 runes system ($state, $derived, $effect). It helps developers identify root causes for common pitfalls like reactivity failures, infinite update loops, and SSR hydration mismatches while leveraging native tools like $inspect(), {@debug}, and svelte-check. Whether you are migrating a codebase to Svelte 5 or fixing complex lifecycle bugs, this skill ensures your Svelte components are performant and error-free.

Key Features

01Resolution of SSR hydration mismatches and browser-only API errors

02Memory leak detection for Svelte 4 store subscriptions

03Systematic debugging for Svelte 5 runes ($state, $derived, $effect)

04Advanced usage guidance for $inspect(), {@debug}, and svelte-check CLI

05Identification of reactivity pitfalls in class properties and object mutations

060 GitHub stars

Use Cases

01Troubleshooting UI update failures in complex Svelte 5 reactive systems

02Fixing 'Cannot use runes in .js files' and other Svelte compiler-specific errors

03Migrating Svelte 4 legacy reactivity and stores to Svelte 5 runes safely

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add snakeo/claude-debug-and-refactor-skills-plugin debug-svelte

For use in Claude.ai and ChatGPT

Download Skill