v0.0.46

What's Changed

New Features

• Added support for file metadata routes in App Router head output
• Added unstable_io shim for next/cache to handle asynchronous operations during prerendering
• Added next/offline shim with useOffline() hook
• Added next/root-params shim for accessing root-level parameters
• Added ForbiddenBoundary and UnauthorizedBoundary components for HTTP access fallback recovery

Bug Fixes

• Fixed next/image component to only fire onError callback once per source per mount
• Fixed App Router to avoid unnecessary reloads when colocated files change during development
• Fixed import paths by replacing relative shim imports with bare specifier vinext/shims/X
• Fixed stream error handling in ISR cache to prevent incomplete data by re-throwing errors in pumpReader
• Fixed error boundaries in App Router to properly preserve falsy thrown values
• Fixed unstable_io() to no longer return hanging promises during prerendering
• Fixed support for enablePrerenderSourceMaps config (defaults to true)
• Fixed support for experimental.outputHashSalt config and NEXT_HASH_SALT environment variable
• Fixed client-side navigation errors to properly forward invalid dynamic usage errors in development
• Fixed draft mode cookie attributes to align with Next.js behavior
• Fixed optional catch-all route parameters to omit empty params
• Fixed stale server actions to return "action-not-found" response
• Fixed support for experimental.swcEnvOptions config
• Fixed route-level boundary nesting order to match Next.js behavior
• Fixed metadata route suffix exemption list to align with Next.js
• Fixed cache handler config to support file:// URLs
• Fixed ISR background revalidation errors to be reported via onRequestError
• Fixed static metadata URL resolver (fillStaticMetadataSegment)
• Fixed next/font/google runtime registrations for better stability
• Fixed cache request leaks in App Router
• Fixed middleware cookie handling and external rewrites alignment
• Fixed layout parameter scoping and error boundary handling
• Fixed cached pages to be properly tagged by route pattern
• Fixed cookie precedence preservation in App Routes
• Fixed SSR render and head collection serialization in Pages Router
• Fixed symlink path resolution in standalone package copy
• Fixed static pages to return 405 status for non-action mutations
• Fixed route handlers to reject middleware control responses
• Fixed server-inserted HTML flushing during SSR streaming
• Fixed invalid app route discovery conflicts to be properly rejected
• Fixed RSC client shims to be excluded from dependency optimization

Performance

• Optimized RSC stream processing by reducing allocations from 3 to 2 tees

Internal / Chores

• Refactored metadata route pattern helpers for better code sharing
• Extracted app page dispatch logic for better organization
• Extracted RSC runtime primitives for improved modularity
• Extracted early request pipeline helpers
• Shared config support list across compatibility checks
• Extracted app prerender endpoints
• Extracted app route handler dispatch
• Extracted server action RSC flow
• Extracted app RSC manifest construction
• Delegated RSC preload hint normalization
• Delegated RSC route matching

Contributors

@NathanDrake2406
@Divkix
@james-elicx