How do their APIs compare?

Based on the SvelteKit documentation in the repository_data, I can now provide a comparison, though I'm limited by what's available about Next.js in the data block. Here's what I can tell you:

SvelteKit API Overview

Data Loading:

• +page.js / +page.server.js: Exported load functions typed as PageLoad or PageServerLoad [documentation/docs/20-core-concepts/20-load.md]. Server loads (+page.server.js) run only on the server and can access databases/private env vars; universal loads (+page.js) run on both server and client [documentation/docs/20-core-concepts/20-load.md:L211-L240].
• Hierarchical data: await parent() lets child load functions access parent layout data [documentation/docs/20-core-concepts/20-load.md:L357-L425].
• Enhanced fetch: Load functions use a special fetch that inherits credentials, makes relative requests on the server, and bypasses HTTP overhead for internal +server.js routes [documentation/docs/20-core-concepts/20-load.md:L276-L296].

API Routes:

• +server.js: Export HTTP verb functions (GET, POST, PUT, PATCH, DELETE, etc.) that receive a RequestEvent and return a Response [documentation/docs/20-core-concepts/10-routing.md:L295-L331]. Similar to file-based REST APIs.

Server Hooks:

• handle: Runs on every request to intercept and transform responses [documentation/docs/30-advanced/20-hooks.md:L19-L41].
• handleFetch: Intercepts all fetch calls to modify URLs or add headers [documentation/docs/30-advanced/20-hooks.md:L105-L143].

Forms/Actions:

• Remote functions via query() and form() exports that are callable directly from components with automatic server-side execution [documentation/docs/20-core-concepts/60-remote-functions.md:L977-L1024].

Limited Next.js Data

Unfortunately, the repository_data block contains only scaffolding scripts and agent skills for Next.js (e.g., GitHub Actions), not API documentation. I cannot make a detailed comparison without access to Next.js's API reference.

To properly compare, you'd need to ask about:

• Next.js's getServerSideProps, getStaticProps, getStaticPaths vs. SvelteKit's load functions
• Next.js API routes vs. SvelteKit's +server.js
• Next.js middleware vs. SvelteKit's handle hook
• Data fetching patterns and credential handling differences

FOLLOW_UPS:

• How do SvelteKit load functions differ from Next.js getServerSideProps?
• What is SvelteKit's form actions API?
• How does SvelteKit handle streaming responses?