v16.3.0-preview.7

Summary

Example Changes fix: error handling and loading states in with-apollo-and-redux example: #91457 Misc Changes Upgrade React from 172742b4-20260716 to 81e442ea-20260721 : #96016 Fix Turbopack middleware matcher with i18n single locale: #96014 Improve performance of validating MPA form submissions: #96013 Enforce serverActions.bodySizeLimit for Server Actions in Edge runtime: #96012 Set correct origin for internal redirects in custom server: #96011 Ensure exotic rewrite param values are properly encoded: #96010 fix(fetch-cache): key fetch(Request, init) by the effective request: #96009 fix(incremental-cache): byte-exact fetch cache key for binary bodies: #96008 Validate server reference IDs during manifest lookup: #96007 fix(next/image): improve performance of detectContentType() : #96006 Preserve basePath in redirect destinations: #95608 [ci] Skip passed-tests cache steps for jobs that never run tests: #96001 docs: add upgrade section to installation and expand AI agents guide: #95861 docs: fix unstable_cache syntax error: #96002 Insights: use a single Learn more link in console errors: #95967 Refine development validation signal handling: #95998 Include examples of static export tools & GitHub Pages template: #95929 docs: note the :has() scaling limit in the Interactive apps guide: #95925 Prevent unhandled rejections when a "use cache" cache handler errors: #95985 [test] Add coverage for throwing custom "use cache" cache handler: #95984 docs: clarify layout.js nesting behavior in route groups: #95720 Fix instant validation blocking navigations: #95939 [ci] Share a single browser instance across all test suites in a single job: #95589 [turbopack] Rename turbopackTreeShaking to turbopackModuleFragments : #95978 cna: use LayoutProps helper in TS layout templates: #95675 [turbopack] Skip redundant top-level root updates: #95903 [turbopack] Drop unused exports from a CJS module: #95716 Turbopack: Simplify parent directory creation retry loop logic: #95835 Run Rust doctests in CI: #95911 docs: add 'Set up your editor' to the installation guide: #95928 fix(cms-contentful): await draftMode() and use Promise<> params type: #95631 Move outputHashSalt out of experimental: #95840 Move immutable static assets config option out of experimental: #95351 [instant] Let dev-server requests bypass the fetch lock: #95761 Upgrade React from 7023f501-20260714 to 172742b4-20260716 : #95901 Fix Rust doctest failures: #95909 [turbopack] Clean up server_chunking_context : #95908 [turbopack] Don't SSR on pages only navigated to through a soft nav: #95539 Package skills/ as a Claude Code plugin: #95907 [ci] Avoid apt-get in the next-stats-action Docker image: #95847 Back/forward set the Nav Inspector back to pending: #95865 fix(agent-rules): pad managed AGENTS.md block with blank lines: #95892 Revert "Run more test suites under cacheComponents flag": #95884 Fix repeated navigations while the Instant Navigation lock is held: #95864 Run more test suites under cacheComponents flag: #95878 Unify appShells flag with Partial Prefetching: #95415 Fix Request Insights span collection: #95818 Revert "Replay same-document traversals that happen before hydration": #95853 [ci] Allow running all deploy tests with builds from a private registry: #95784 [turbopack] Only ship pages-router routes in the client chunk-group bootstrap manifest: #94671 [turbopack] Inline the chunk group bootstrap in Next.js to drop the per-route runtime: #94666 [turbopack] Add chunk_group_bootstrap_params and the chunk-loading global to the build manifest: #94663 [turbopack] Add registerEntry() to handle inline bootstrapping: #94664 [turbopack] Add inline_chunk_group_bootstrap to BrowserChunkingContext and chunk_group_bootstrap_params to ChunkGroupResult : #94661 [turbopack] Create a chunk_group_bootstrap_params() function: #94631 [turbopack] Create a shared asset with browser runtime code: #94586 Turbopack: trace externals imported only by server actions: #95824 [turbopack] Generate component chunks for each merged group to increase cache hits: #95261 Exclude stale under 5 minutes from app shells: #95833 docs: remove experimental @next/routing note: #94903 [turbopack] Tell agents not to mention next.config.js options: #95825 chore: Remove stale build warning: #95813 Replay same-document traversals that happen before hydration: #95682 docs: cssChunking graph option: #95693 [Bench] Extend bench app to have realistic client chunk counts: #95814 Add more realistic bench fixtures: #95807 Fix Request Insights subscription initialization: #95794 Model async userland loading in app routes as a state machine: #95791 Preserve init errors from async route modules: #95799 Fix cache warming and static params for metadata images with top-level await: #95790 Only track pending imports for real promises: #95789 Support metadata routes in --debug-build-paths: #95788 Respect NEXT_HASH_SALT for server side assetsHashes: #95738 telemetry: add agentName to anonymous metadata: #95586 [turbopack] Optimize the implementation of AutoMap/AutoSet : #95694 Better support the CLI spinner when running the TSC CLI: #95753 Upgrade React from 5123b063-20260708 to 7023f501-20260714 : #95782 docs: add route-side URL data audit to the Partial Prefetching adoption guide: #95389 docs: revalidateTag with expire zero, for route handlers: #95760 request insights: add DevTools request panel (5/5): #93978 docs: Improve immutable static docs: #95752 Add React sync development skill: #95620 docs: useSearchParams example stray link: #95759 Improve the NFT error message and ignore comment handling: #95144 Upgrade to swc 73: #95731 [turbopack] Switch make_production_chunks to use floats: #95749 Fix termination handling: #95692 Restore canary version 16.3.0-canary.84 after v16.3.0-preview.6 preview release Credits Huge thanks to @vercel-release-bot , @eps1lon , @ZaforAbdullah , @gaojude , @aurorascharff , @icyJoseph , @timneutkens , @WildChargerTV , @ankurdotio , @bgw , @sampoder , @marcoshernanz , @manoraj , @mischnic , @acdlite , @gaearon , @gnoff , @andrewimm , @lukesandberg , and @feedthejim for helping!

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