Misc Changes

• Fix dev overlay hydration error ordering: #94555
• [turbopack] Retry chunk loading on failure: #94918
• Upgrade React from ad78e251-20260616 to b1786c31-20260618: #94951
• [ci] Update playwright to 1.61.0: #94871
• [cd] reduce size of npm metadata on publish: #94953

Credits

Huge thanks to @timneutkens, @sampoder, @vercel-release-bot, @bgw, and @styfle for helping!

Misc Changes

• Scope the Cold cache indicator in dev to shell cache misses: #94911
• Fix Instant Navs DevTools capture bugs and re-enable its test suite: #94866
• docs: fix capitalization of Server and Client Components: #94891
• docs: Fix broken link to Node.js Debugging Guide: #93958
• docs: fix broken Node.js inspector URL in debugging guide: #94934
• examples/with-ably: update to App Router + Ably v2: #94600
• docs: clarify sequential data fetching example: #94930
• docs: GtK, caching with fetch is opt-in - extended to any method or header included: #94899
• [test] Enable metadata-streaming-config for Cache Components: #94936
• fix(dev-overlay): correct open-in-editor path when using a src directory: #94775
• Fix repoRoot for adapters: #94478

Credits

Huge thanks to @unstubbable, @niketchandivade, @gilest, @jahanzaib-iqbal-dev, @owenpearson, @davidgg, @icyJoseph, @eps1lon, @fhfournier, and @mischnic for helping!

Misc Changes

• Let LLMs create less noisy and more focused PR descriptions: #94896
• Avoid re-logging server-originated errors forwarded from the browser: #94917
• [ci] Only install chromium-headless-shell and not chromium: #94882

Credits

Huge thanks to @eps1lon, @unstubbable, and @bgw for helping!

Misc Changes

• [cd] Continue release train if @next/swc-wasm-* fails to publish: #94912

Credits

Huge thanks to @eps1lon for helping!

Misc Changes

• pass --locked to cargo binstall: #94834
• [ci] Use node-version-file when we already have a repository checkout and reduce hardcoded references to node versions: #94780
• [turbopack] Allocate Effects in an arena: #94614
• [turbo-tasks] Shrink RawVc to 8 bytes and CellId to 4 bytes: #94792
• rust react compiler: detect and build for react 18: #94836
• [test] Unflake metadata static routes cache test: #94796
• [test] Recover from a leftover build process on test retry: #94797
• Properly set response-based OTEL attributes with adapters : #94603
• dev-overlay: polish error header layout and instant fix-card chip: #94790
• Upgrade React from 43bcbf80-20260603 to d9158919-20260615: #94826
• Make cacheMaxMemorySize: 0 and custom cache handlers fast in dev: #94784
• [ci] Clean up references to self-hosted runners: #94827
• Fix remaining OTEL issues in adapter: #94817
• Turbopack: improve NFT warning message: #94854
• Add experimental.useExperimentalReact to opt into React's experimental channel: #94861
• Turbopack: improve issue printing colors: #94858
• [turbopack] Update algebra in chunking algorithm: #94873
• [CC] Fix accumulator flushing logic: #94857

Credits

Huge thanks to @lukesandberg, @bgw, @sampoder, @wbinnssmith, @unstubbable, @mischnic, @aurorascharff, @vercel-release-bot, @gaojude, and @lubieowoce for helping!

Core Changes

• chore: upgrade next-rspack to rspack 2.0: #92222

Misc Changes

• docs: Route Handlers to be supported later on: #94705
• [ci] Allow "rerun failed jobs" to work up until 5 days for e2e deploy tests: #94812
• Fix stale next data API test URL: #94815
• Format submillisecond durations as milliseconds: #94813
• Instruct agents to keep and commit the generated agent-rules block: #94725
• [agents-md] Index bundled docs instead of downloading into .next-docs: #94719
• docs: add prefetchInlining config reference: #94650
• Move warnOnce imports into statements guarded by process.env.NODE_ENV === 'development': #94781
• Expand signature rewriting to allow returning ResolvedVc from turbo task functions: #94772
• Move errorOnce imports into statements guarded by process.env.NODE_ENV === 'development': #94782
• Add a message to AGENTS.md about super:: imports.: #94733
• Turbopack: add experimental React compiler support: #94573

Credits

Huge thanks to @icyJoseph, @eps1lon, @devjiwonchoi, @timneutkens, @gaojude, @ifer47, @sampoder, @lukesandberg, @wbinnssmith, and @SyMind for helping!

Misc Changes

• Avoid a premature Suspense fallback flash in the streaming dev render: #94783

Credits

Huge thanks to @unstubbable for helping!

Misc Changes

• [codemod] Write pnpm overrides to pnpm-workspace.yaml on pnpm v11+: #94690
• [ci] Always upload canary tarballs from the canary branch: #94557
• docs: document non-streamed bot rendering and Cache Components: #94605
• [CC] Exclude caches with low stale from static prerenders: #94678
• [CC] Rename shellStage to streamReleaseStage: #94749
• [turbopack] Drop data while serializing in next build: #94561
• [turbopack] Optimize cell_dependency representation: #94717
• [turbopack] Use final_read_hint in top level turbo tasks: #94712
• refactor: process streaming prerenders more efficiently: #94764
• Allow root params in App Shell (client)
• fix: this in edge sandbox setTimeout/setInterval: #94754

Credits

Huge thanks to @eps1lon, @icyJoseph, @lubieowoce, and @lukesandberg for helping!

Misc Changes

• [turbopack] Rename variables in path_join and add tests: #94625
• Warn on prefetch={true} navigation without Partial Prefetching (dev): #94672
• Serve stale 'use cache' entries in the dev server until they expire: #94662
• Re-fetch dynamic content on navigation with partialPrefetching enabled: #94655
• docs: expand the Cache Components migration guide: #94649
• Add Owner Stack to "prefetch={true} navigation without Partial Prefetching" warning: #94683
• [tubopack] migrate rcstr! to use scattered collect: #94498
• Strip internal dev request-id headers from userland headers(): #94703
• Persist 'use cache: private' entries in dev: #94694
• [App Shells] refactor instant-validation to make adding new stages easier: #94711
• migrate turbo-tasks to scattered collect: #94503
• [CC] refactor staged rendering codepaths in params/searchParams: #94718
• [App Shells] Track whether shell prefetch used session data: #94484
• Treat empty resume bodies as dynamic render requests: #94729

Credits

Huge thanks to @sampoder, @acdlite, @unstubbable, @icyJoseph, @eps1lon, @lukesandberg, @lubieowoce, and @gnoff for helping!

Misc Changes

• [turbopack] Enable turbopackFileSystemCacheForBuild by default in non-stable releases: #94616
• [16.3.x-preview] Setup release branch: #94594
• [cd] Publish preview release with @preview NPM dist-tag: #94619
• [cd] Ensure wasm binaries get tagged properly: #94621

Credits

Huge thanks to @lukesandberg and @eps1lon for helping!