Summary & Key Takeaways ​

• SvelteKit 3 has reached Release Candidate status, indicating its imminent stable release.
• Enhanced cross-page form actions now align with native form behavior.
• Adapter Vite plugins can now be split into pre and post groups for better pipeline control.
• Svelte 5.57 introduces getOrInsert and getOrInsertComputed methods for SvelteMap.
• The createContext function now returns a has function to check context existence without errors.
• The <select> element now supports the defaultValue attribute for form resets.
• The sv CLI includes a new ai-tools add-on, replacing the older mcp one.
• SvelteKit 3 now supports a QUERY HTTP method handler in +server.js files.

Our Commentary ​

This is a big one for Svelte users. SvelteKit 3 RC means the finish line is truly in sight, and those enhanced form actions sound like a real quality-of-life improvement. I'm also intrigued by the sv ai-tools add-on; it feels like every framework is integrating AI now, and I wonder what specific problems it aims to solve for developers. We're seeing a lot of thoughtful API refinements here.