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# SvelteKit Skill
> Web development, streamlined.
## Ecosystem Graph
```mermaid
graph LR
sveltekit["SvelteKit"]
sveltekit -- "alternative to" --> nextjs
sveltekit -- "deploys to" --> vercel
```
## Quick Start
SvelteKit compiles away the framework. Instead of a virtual DOM, it generates highly optimized vanilla JavaScript. It uses a file-based routing system (e.g., `+page.svelte` and `+page.server.ts`).
```bash
npm create svelte@latest my-app
```
## Production Patterns
### Form Actions
SvelteKit heavily utilizes native HTML forms for mutations. Write a `default` action in `+page.server.ts` to handle POST requests, interact with your database, and return validation errors seamlessly without requiring client-side `fetch`.
## Architecture & Scaling
### Load Functions
Use `+page.server.ts` to export a `load` function. This function runs strictly on the server, fetching database records securely, and passes the resolved props directly to the `+page.svelte` component during SSR.
## Error Recovery
Throw `error(404, 'Not found')` from your load functions. SvelteKit automatically renders the nearest `+error.svelte` boundary.
## Security Notes
Form actions automatically protect against CSRF attacks. Do not disable this protection unless building a public API endpoint, in which case you should use a `+server.ts` standalone route.
## Relationships
**Alternatives**: [nextjs](/skills/nextjs)
**Deploys To**: [vercel](/skills/vercel)
## References
- [SvelteKit Docs](https://kit.svelte.dev/docs)
## Why use this skill
Use this when your agent works with **sveltekit** — structured patterns beat pasted docs and prevent common hallucinations.
## AI pitfalls
- Using outdated SDK or API versions from training data
- Inventing environment variable names
- Omitting error handling and retry logic
## Production checklist
- [ ] Secrets in environment variables, not source code
- [ ] Error handling and logging in place
- [ ] Rate limits and timeouts configured
## Related skills
- [`nextjs`](../nextjs/SKILL.md) — alternative to
- [`vercel`](../vercel/SKILL.md) — deploys to
---
> **Last Verified:** 2026-07-02
