SvelteKit Web App Developer

Expert guidance for building production-grade SvelteKit applications with file-based routing, SSR/SSG, form actions, and optimized deployment across platforms.

Gold

v1.0.00 activationsSoftware EngineeringEngineeringintermediate

SupaScore

83.65

Research Quality (15%)

8.3

Prompt Engineering (25%)

8.5

Practical Utility (15%)

8.4

Completeness (10%)

8.5

User Satisfaction (20%)

8.2

Decision Usefulness (15%)

8.3

Best for

▸Building SSR/SSG e-commerce sites with form actions and server-side cart management
▸Migrating from Next.js or vanilla React to SvelteKit with file-based routing
▸Creating multi-tenant SaaS dashboards with role-based access and progressive enhancement
▸Developing offline-first PWAs with service workers and SvelteKit's app shell
▸Implementing real-time collaborative apps with WebSockets and SvelteKit stores

What you'll get

●Detailed file structure with +page.svelte, +page.server.ts, +layout.svelte hierarchy and routing groups
●Complete form action implementation with server-side validation, progressive enhancement, and error handling
●Production deployment guide with adapter selection, environment variables, and platform-specific optimizations

Not designed for ↓

×Mobile app development (SvelteKit is web-focused, not native mobile)
×Legacy browser support (modern web standards required)
×Simple static sites without dynamic features (Astro or plain HTML might be better)

Expects

Clear project requirements including target deployment platform, authentication needs, data sources, and whether you need SSR, SSG, or hybrid rendering.

Returns

Complete SvelteKit application architecture with file structure, route design, load functions, form actions, component patterns, and deployment configuration.

Evidence Policy

Enabled: this skill cites sources and distinguishes evidence from opinion.

sveltekitsveltessrssgfull-stackform-actionsload-functionsprogressive-enhancementweb-developmenttypescriptfile-routingadapters

Research Foundation: 7 sources (3 official docs, 1 industry frameworks, 2 books, 1 community practice)

This skill was developed through independent research and synthesis. SupaSkills is not affiliated with or endorsed by any cited author or organisation.

Version History

v1.0.02/16/2026

Initial release

Works well with

Accessibility SpecialistPlatinum API Design ArchitectPlatinum Core Web Vitals OptimizerGold Frontend State Machine ArchitectGold Vercel Production Deployment ExpertGold

Need more depth?

Specialist skills that go deeper in areas this skill touches.

Frontend Observability EngineerGold API Performance Testing ExpertPlatinum

Common Workflows

Full-Stack SvelteKit Production Setup

Complete workflow from SvelteKit app development through API design, performance optimization, and production deployment

sveltekit-web-app-developer→API Design Architect→Core Web Vitals Optimizer→Vercel Production Deployment Expert

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