next

Core Changes

• Use and enforce exhaustive switch statements for work unit store: #81577
• Enable @typescript-eslint/switch-exhaustiveness-check rule: #81583
• [dynamicIO] use RSC dynamicness to control partial vs complete PPR result: #81627
• [dynamicIO] Do not use React.unstable_postpone(): #81652
• feat: new detachable panel UI: #81483
• Turbopack: content-hash PageLoaderAsset: #81450
• [segment explorer] fix content overflow styling: #81649
• Improve reliability of owner stacks for async I/O errors: #81501
• fix(router): Prevent redirect loop on root data requests with basePath: #81096
• Ensure custom NextServer config is honored: #81681
• Fix before interactive incorrectly render css: #81146
• perf: memorize exclude function in webpack config: #81525
• Also enforce experimental features when there's no next config file: #81679
• feat(next/image): warn when images.qualities is undefined: #81690
• feat(build): optimize filterUniqueParamsCombinations to generate sub-combinations: #81321
• Update NextAdapter type and re-export: #81692
• upgrade to path-to-regexp@6.3.0: #80123
• [metadata] replace for initial body icon case: #81688
• [segment explorer] remove dev panel ui flag: #81670
• Simplify running test apps locally with ppr or dynamicIO enabled: #81668
• [turbopack] Return cached Promise from __turbopack_load_by_url__ : #81663
• Upgrade React from 97cdd5d3-20250710 to 2f0e7e57-20250715: #81678
• Delete unused renderToString function: #81707
• Discard prerendered route handler data from FS cache after revalidation: #81611
• Upgrade React from 2f0e7e57-20250715 to d85ec5f5-20250716: #81708
• Ignore pending revalidations during prerendering: #81621
• [turbopack] Clear chunk cache on HMR instead of creating new next-server VM: #81664
• fix: rootParams should throw in client when fallbackParams are not present: #81711
• perf(build): optimize buildAppStaticPaths performance and add helper function: #81386
• Turbopack: Support string without options for @next/mdx: #81713
• [Segment Cache] Support dynamic head prefetching: #81677
• [sourcemaps] Consistent cursor columns: #81375
• fix: revert client segment route changes for sub shell generation: #81731
• fix: pages router metadata bugs with React 19: #81733
• Improve error handling for headers/cookies/draftMode in 'use cache': #81716
• [devtool] fix duplicate rendered indicator on server: #81729
• [devtool] enable segment explorer by default: #81737
• [turbopack] Stop exposing globals from Turbopack runtime: #81727
• Remove unnecessary await: #81761
• [chore] bump zod to latest v3: #81757
• feat(turbopack): Log anonymized internal error (panic) information to telemetry: #81272
• fix: revert client segment route changes for sub shell generation: #81740
• bugfix: static resources staleTime should be renewed once refetched: #81771
• [devtool] move font styling to global.css: #81782
• [devtool] copy decoded info of error details: #81735
• fix(build): add sourcePage context for PPR dynamic route lambda creation: #81781
• refactor: rename experimental.dynamicIO to experimental.cacheComponents: #81562
• Properly handle hanging promise rejections during prerendering: #81754
• Upgrade React from d85ec5f5-20250716 to dffacc7b-20250717: #81767
• Refactor: Get rid of overly generic getExpectedRequestStore function: #81791
• [devtool] migrate css reset to global.css: #81783
• [dev-tools] Robust shortcut detection: #81756
• [segment explorer] hide for pages router: #81813
• [devtool] fix scrollbar styling: #81814
• fix(ppr): ensure fallback route params trigger dynamic resume: #81812
• [devtools] restart server pending state: #80858
• Turbopack: fix dist dir on Windows: #81758
• fix: remove boundary sentinel from RSC responses: #81857
• [sourcemaps] Try VM for retrieving source maps first: #81869
• [devtools] save user config inside .next/cache: #81807
• Server: Remove unused code: #81886
• refactor: encapsulate content type within RenderResult: #81861
• refactor: handle null RenderResult responses gracefully: #81895
• Upgrade React from dffacc7b-20250717 to e9638c33-20250721: #81899
• chore(devtools): sync todos to linear: #81901
• Introduce 'use cache: private': #81816
• chore(deps): update browserslist: #81851
• Remove web-server from edge-ssr-app: #81389
• Stabilize node middleware support: #81907
• Add run-turbopack-compiler trace span: #81917
• fix: support calling onClose multiple times in edge-ssr-app: #81911
• fix: logging the correct process for listened port: #81903
• Build: Include rewrites in manifest generation: #81894
• Routing: Clean up some code: #81932
• [sourcemaps] Ensure codeframe when calling Client Functions from Server: #81918
• [segment explorer] missing file suggestion: #81617
• [turbopack] Always print trace labels in headers: #81728
• Revert "[metadata] use https protocol for schema urls": #81934
• Upgrade React from e9638c33-20250721 to 7513996f-20250722: #81940
• Upgrade to swc v33: #81750
• Remove extra base-server code: #81944
• Turbopack: flatten sourceInfo to avoid objects, reorder args, compress node.js entry: #81545
• Fix dynamicParams false layout case in dev: #81990
• Initial MCP implementation: #81770
• Fix: Unresolved param in x-nextjs-rewritten-query: #81991
• Turbopack: Add an option to use system TLS certificates (fixes #79060, fixes #79059): #81818
• Turbopack: Remove unused proxy option in turbo-tasks-fetch, lightly document HTTP_PROXY/HTTPS_PROXY environment variables: #81905
• Upgrade React from 7513996f-20250722 to edac0dde-20250723: #81984
• [devtools] Cleanup folder structure: #82012
• [devtools] Fix "open in editor" for locations in stackframes: #82013
• [Segment Cache] Fix: Key by rewritten search: #81986
• Upgrade vercel og and remove yoga type patching: #81937
• [perf] cache load config results: #80570
• Turbopack: use prototype for turbopack context for better runtime performance: #81547
• [reactcompiler] Test with latest RC: #82002
• [devtools] Fix various exhaustive-deps violations: #82010
• [devtools] Apply React Compiler to Next.js DevTools source: #82004
• Upgrade React from edac0dde-20250723 to 3d14fcf0-20250724: #82020
• Adjusted the warning message to be more descriptive: #82054
• Track fallback params on workUnitStore: #82003
• Fix API stripping JSON incorrectly: #82061
• Upgrade React from 3d14fcf0-20250724 to 19baee81-20250725: #82063
• use FetchStrategy to control prefetching behavior everywhere: #82032
• [Segment Cache] set fetchStrategy on segments from a dynamic request: #82059
• Revert "Upgrade vercel og and remove yoga type patching (#81937)": #82066
• Optimize segment data routes: #82033
• Turbopack: write tasks doesn't need to be session dependent, as effects will restore: #78727
• [sourcemaps] Fully sourcemap stacks on the Server: #81904
• fix(Rspack): use loaderContext.utils.contextify to replace ModuleFilenameHelpers.createFilename: #82104
• next/root-params: #80255
• fix(next/image): fix image-optimizer.ts headers: #82114
• Upgrade React from 19baee81-20250725 to eaee5308-20250728: #82120
• Fix validateRSCRequestHeaders incorrect redirect: #82119
• fix(next/image): improve and simplify detect-content-type: #82118
• [CacheComponents] Use fallback params when validating dynamic routes in dev: #82069
• Extract getDynamicParam to a shared module: #82137
• Fix i18n fallback: false collision: #82136
• [segment explorer] normalize path when running inside monorepo: #82146
• [segment explorer] windows compatibility: #82147
• Upgrade React from eaee5308-20250728 to 9be531cd-20250729: #82159
• Ensure setAssetPrefix updates config instance: #82160
• Revert "Fix tracing of server actions imported by client components (#78968): #82161
• Remove useMDXComponents argument: #80871
• Fix RSC hash validation for middleware external rewrites: #82176
• @next/codemod: update docs url in README: #82135
• @next/codemod: Add experimental.turbo to turbopack codemod for Next.js configs: #82134
• refactor: lowercase app router header values: #82169
• Strip internals from NextRequest types: #82172
• allow root params access in private caches: #82125
• [devtool] bump base-ui to 1.0.0-beta.2: #82206
• Upgrade @vercel og: #82201
• Upgrade React from 9be531cd-20250729 to 9784cb37-20250730: #82207
• Fix: the unexpected clearing of symbolic link directories: #82191
• [next-dev] Set TURBOPACK env before loading config: #82162
• fix: display multiple lockfile warn if neither outputFileTracingRoot or turbopack.root option is provided: #82164
• Revert "Initial MCP implementation (#81770)": #82217
• Revert "Upgrade @vercel og (#82201)": #82219
• Fix: Don't bail out of prefetch if head is missing: #82216
• Upgrade React from 9784cb37-20250730 to c260b38d-20250731: #82247
• [Cache Components] Runtime prefetching: #81088
• Parse dynamic params on the client: #82185
• Mark bun builtin modules as external (fixes #75220): #77616
• Turbopack: Compact only at the end for short sessions: #82224
• feat: add fallback root params support for prefetch segment data routes: #82282
• feat: add route context to prerender error messages: #82283
• feat: automatically generate route types: #81396
• [Cache Components] Reset PrerenderStore after generating RSC payload: #82286
• Include eslint-plugin-react-hooks in React sync: #82294
• [devtools] Remove unnecessary cascading update: #82295
• Turbopack: name the module factory function: #73553
• Update font data: #82292
• fix: next/root-params erroring when rerendering after action: #82326
• Remove params from segment path: #82249
• Upgrade React from c260b38d-20250731 to be11cb5c-20250804: #82339
• fix: OTel root span should indicate error status on exceptions: #82212
• [Cache Components] Allow span creation while prerendering: #82350
• feat(turbopack): improve compile-time define value to support more data types and expr evaluation: #81042
• [Pages] fix: _error page's req.url can be overwritten to dynamic param on minimal mode: #82347
• [Pages] fix: use asPath for query-only navigation with useRouter: #82236
• loader tree: add special segment name to virtual parallel route segments: #82383
• fix: add ?dpl to fonts in /_next/static/media: #82384
• Upgrade React from be11cb5c-20250804 to 7deda941-20250804: #82373
• [devtools] Make state read-only in types: #82396
• Add experimental clientParamParsing feature flag: #82393
• add unstable_isUnrecognizedActionError: #78933
• [Cache Components] give the "seconds" profile a 30s staleTime: #82332
• Represent "virtual" segments like route groups: #82422
• [Segment Cache]: fix infinite prefetching when staleTime is 0: #82388
• Remove param values from static route tree: #82376
• [Cache Components] Only validate the shell on SSR render: #82381
• fix: static not-found missing in prerender manifest: #82199
• Turbopack: Share entrypoint template logic between Turbopack/webpack: #82385
• Add path to Image documentation: #82329
• [errors] revamp graceful degrade error boundary: #82474
• Fix: Do not force BLOCKING_STATIC_RENDER for DOM bots: #82427
• Update build-complete for adapter API: #82452
• fix: swc tracing: #82470
• Upgrade React from 7deda941-20250804 to 3958d5d8-20250807: #82447
• Delete abandoned segment parsing code: #82458
• Upgrade React from 3958d5d8-20250807 to f1e70b5e-20250811: #82534
• Upgrade React from f1e70b5e-20250811 to ac7820a9-20250811: #82543
• fix(next/image): use image-size pkg as additional format detector: #82538
• fix: add ?dpl to fonts in /_next/static/media part 2: #82488
• Fix: Disambiguate Mediapartners-Google user agent: #82536
• Fix: Allow dynamic rendering when root layout is wrapped in Suspense: #82378
• wrap devtools stories in context providers: #82345
• [devtools] Remove unused componentStackFrames field: #82395
• [Deprecation Warnings]: add amp deprecation warning: #82551
• fix(next/image): handle empty buffer and experimental flag for skipMetadata: #82569
• fix: amp deprecation warning should assert on user config: #82572
• fix: Prevent duplicate file entries in modulesCode: #82550
• feat: Turbopack typed links: #81528
• Upgrade React from ac7820a9-20250811 to 1dc3bdea-20250812: #82575
• [Runtime prefetch] resolve runtime APIs in a separate task: #82475
• Clean up unused code in restart server button: #82409
• chore: Update babel types and do some light cleanup of babel loader: #82486
• [Cache Components] Avoid cache misses when resuming a cached page: #82578
• chore: Remove unused Map support from next/dynamic transform: #82487
• [Deprecation Warnings]: add unstable_rootParams deprecation warning: #82582
• Turbopack: set window.next.turbopack instead: #82580
• fix router handling when setting a location response header: #82588
• Fix: Resolve PPR resume mismatch by search params: #82587
• Upgrade React from 1dc3bdea-20250812 to f1222f76-20250812: #82595
• [devtools] Move ShadowRoot into context: #82296
• Remove React 17 logic from Pages Router static generation: #82604
• [Segment Cache] Optimistic prefetch for search params: #82586
• Handle badged console calls when dimming console output: #81889
• run config deprecation checks only on user-provided configuration: #82613
• [devtools] Remove unused code: #82299
• [turbopack] Update Turbopack build warning message : #82591
• [Cache Components] Disallow sync access of cookies & headers at runtime: #82564
• feat: type guard file generation: #81400
• fix: find root dir on fs root: #82590
• fix: use in operator to check dev indicator option when its obj: #82629
• Upgrade React from f1222f76-20250812 to 379a083b-20250813: #82642
• feat(next/image): warn when images.localPatterns is undefined and src has query: #82627
• Turbopack: add turbo_tasks::spawn: #82634
• Fix fetch logging after revalidation via server action: #82643
• Fix request type in typed route validator: #82644
• fix: use .js extension for relative imports: #82669
• feat: add RouteContext type for app router route handlers: #82670
• Add additional handling for build-complete: #82671
• fix: Combine the hrtime tuple to get a better seconds representation: #82687
• test: migrate manifest tests to snapshot testing with normalizeManifest utility: #82675
• perf(router): replace LRU cache with optimized doubly-linked list implementation: #82633
• Turbopack: use a source content regexp for the react compiler: #82631
• Upgrade React from 379a083b-20250813 to a96a0f39-20250815: #82691
• fix: memory leak from cloneResponse: #82678
• Turbopack: Fix logic in HMR logging code that could emit a NaN build time: #82389
• fix: use turbopack.root value for outputFileTracingRoot to have consistent tracing root: #82653
• fix: return plain text 404 for invalid static asset paths: #75111
• Turbopack: show timing event for database compaction: #82369
• chore(test): update sharp api test: #82740
• [type] dynamic skip generating unused types: #82755

Example Changes

• Add Prisma ORM example to Next.js examples: #75290
• chore: Update with-supabase example to use getClaims(): #81383
• docs: Improve Content Security Policy documentation: #80580

Misc Changes

• Update Rspack development test manifest: #81603
• Allow beforePageLoad to be async: #81650
• Docs: POC: #81419
• chore(bot): update comment: #81672
• Fix build-native.ts on Windows: #81673
• Update Rspack development test manifest: #81660
• Update Rspack production test manifest: #81661
• Add create release branch workflow: #81687
• fix patch-next by adding missing script: #81430
• Turbopack: Generalize ImportedBinding effect creation to avoid as much special-casing of SimpleAssignTarget: #81653
• docs: Update redirects i18n documentation for App Router: #81347
• Include use-cache test suite in the Cache Components tests: #81610
• Improve error message for sync server functions: #81705
• [lint] keep lint-stage use faster linting: #81710
• [test] Fix app-static deploy test: #81712
• Fix: createRouterAct "reject" config: #81720
• Update Rspack development test manifest: #81702
• Update Rspack production test manifest: #81701

Credits

Huge thanks to @unstubbable, @gnoff, @RobPruzan, @mischnic, @huozhi, @delbaoliveira, @styfle, @ankur-arch, @skt-t1-byungi, @ijjk, @Han5991, @SyMind, @Anas-github-acc, @hf, @bgw, @wyattjoh, @ztanner, @prateekkish, @eps1lon, @lubieowoce, @timneutkens, @acdlite, @lukesandberg, @bgub, @Cy-Tek, @padmaia, @raunofreiberg, @devjiwonchoi, @sokra, @MidnightDesign, @stephenliang, @allenzhou101, @icyJoseph, @gaojude, @remcohaszing, @wesjune, @wbinnssmith, @m1abdullahh, @Sayakie, @startracex, @chadfennell, @dlehmhus, @Jarred-Sumner, @candymask0712, @stepan662, @PuppyOne, @huperniketes, @xusd320, @MichalMoravik, @fireairforce, @kitfoster, @feedthejim, @r34son, @guoci, @JamBalaya56562, @adkile, @snyamathi, and @kachkaev for helping!