next 16.0.0

v16.0.0

on Node.js NPM

Core Changes

• Development: Don't import app-router / hot-reloader through next/link in application code: #83656
• Remove clientParamParsing requirement from RDC for Navigations: #83661
• Upgrade React from 6b70072c-20250909 to 886b3d36-20250910: #83650
• Turbopack: Use readFileSync / writeFileSync for manifest writing: #83694
• Upgrade React from 886b3d36-20250910 to f3a80361-20250911: #83696
• Don't create client-side debug channel if the feature is disabled: #83699
• fix: dev should produce the correct default fallback regex to match builds/Turbopack: #83701
• [devtool] fix overlay styles are missing: #83721
• Revert "Remove clientParamParsing requirement from RDC for Navigations": #83725
• Only enable unhandledRejection filtering when opted in: #83726
• Fix index data route for adapter build-complete: #83730
• Remove leading underscore for unhandledRejection envvar: #83732
• Upgrade React from f3a80361-20250911 to 93d7aa69-20250912: #83729
• Upgrade React from 93d7aa69-20250912 to 8a8e9a7e-20250912: #83742
• Fix reentrancy of unhandledRejection filtering: #83741
• Fix type for unhandled rejection handler process.removeListener: #83748
• [OTel] fix: Root span name should not include high cardinality URL: #75416
• Turbopack: Remove matchers.reload() call on each request: #83720
• [Breaking] Flat config as default in @next/eslint-plugin-next: #83763
• fix: Rspack splitChunks.chunks regex: #83670
• Revert "Turbopack: Remove matchers.reload() call on each request": #83819
• fix: unstable_cache should perform blocking revalidation during ISR revalidation: #83820
• fix(Rspack): resolve HMR unresponsiveness or unexpected full reload & update dev snapshot: #83480
• Allow next.config.mts for Node.js native TS resolver: #83556
• chore: Ensure Import Trace starts in a newline: #83638
• Development: Remove matchers.reload() on each request: #83829
• Upgrade React from 8a8e9a7e-20250912 to 5e0c951b-20250916: #83850
• Bump typescript 5.9.2: #83833
• Allow headers, rewrites and redirects to be defined as sync functions: #83743
• Turbopack: Optimize addedRoutes and removedRoutes calculation: #83840
• [next-config-ts] Set Node.js native TS loader fallback flag to process.env: #83832
• Development: Clarify TypescriptStatus in watcher: #83857
• Upgrade sharp dependency to version ^0.34.4: #83892
• Upgrade React from 5e0c951b-20250916 to 128abcfa-20250917: #83906
• Add native ts resolver docs link to transpile-config: #83914
• OTel: use srcPage for templates when next.route is unavailable: #83911
• Remove inline CSS sourcemaps from next-devtools: #83917
• Development: Move all TypeScript related work in watcher together: #83912
• [Cache Components] Allow sync IO inside console methods : #83843
• Upgrade React from 128abcfa-20250917 to 84af9085-20250917: #83959
• Build: Add .next/trace-build with high level trace: #83949
• Remove force writing **/*.mts to tsconfig: #83967
• feat: Isolate dev build from prod: #83961
• Remove JS size reporting from next build: #83815
• Docs/workspace setup: #83490
• Turbopack: support import ... with {type: "bytes"}: #83896
• fix: error overlay not closing when backdrop clicked: #83981
• Upgrade React from 84af9085-20250917 to d415fd3e-20250919: #84003
• fix: worker logs should still support color: #84024
• Update font data: #84005
• Allow passing port to next internal trace: #83907
• Turbopack: error when importing Typescript in node_modules: #83990
• Turbopack: Deterministic builds (prerender-manifest, .next/package.json, ./next/postcss.js): #84081
• Turbopack: Fix babel-loader (allowing built-in or manual configuration): #82676
• [Cache Components] allow using headers() in runtime prefetches: #83838
• [Breaking] Remove deprecated publicRuntimeConfig and serverRuntimeConfig: #83944
• Turbopack: mode to disable tracing: #83683
• babel-loader: Fix a few issues with config caching: #83973
• Turbopack: Merge babel-loader and react-compiler configuration logic to avoid running babel twice: #83502
• [breaking]: enable router scroll optimization by default: #84102
• Fix layout for ssgPageRoutes in the file tree: #84104
• Turbopack: Remove useless 'default' built-in webpack loader condition: #84111
• Fix: Client should auto reload after server restarts: #83971
• trace-build: Add missing spans: #84080
• Development: Remove TypeScript from the hot path during bootup: #84090
• Guide users to experimental.cacheComponents config: #84121
• Development: Only load webpack when used: #84123
• Turbopack: Skip loading webpack plugin: #84125
• Development: Only load createEnvDefinitions when used: #83935
• BREAKING CHANGE!: bump default images.minimumCacheTTL from 1 min to 4 hours: #84105
• Feat: Add Model Context Protocol (MCP) server to Next.js dev server: #84100
• Upgrade React from d415fd3e-20250919 to 1eca9a27-20250922: #84093
• Turbopack: Remove the deprecated .turbo config object: #84109
• Flag excess properties in Next.js config with TypeScript: #84069
• docs: update Security section to direct disclosures : #84156
• ci: Enable experimental.isolatedDevBuild for test-experimental-dev: #84099
• [turbopack] Ensure React Compiler options are based dev vs prod: #84062
• Enable anonymous function naming in React Compiler: #84070
• Revert "[Breaking] Remove deprecated publicRuntimeConfig and serverRuntimeConfig (#83944)": #84167
• Fix double comma in build manifest: #84131
• [turbopack] set app dir only to true when no pages entries detected: #84144
• Split code-frame into separate compiled package: #84174
• refactor: separate forward browser logs utils: #84151
• Upgrade React from 1eca9a27-20250922 to e2332183-20250924: #84189
• [Cache Components] default to filtering unhandledRejection after abort: #84192
• fix: prevent URL mutation in router rewrites: #83963
• fix(server): fix pages router resume router matching: #84158
• Feat: get_errors MCP endpoint: #84161
• Add internal environment variable for enabling React Compiler: #84176
• [devtools] Disable React's default Transition indicator: #84202
• Upgrade React from e2332183-20250924 to b0c1dc01-20250925: #84248
• Feat: get_page_metadata MCP endpoint: #84211
• feat: capture logs into logging file during development: #84183
• babel-loader: Avoid calling expensive isReactCompilerRequired check when we must run Babel anyways: #84103
• [mcp] expose logging: #84226
• Move config.turbopack.moduleIds to config.experimental.turbopackModuleIds: #84230
• Show invalid default export errors during prerendering: #84242
• fix: make sure caller exists in babel preset: #84154
• [mcp] allow to enable mcp server through env var: #84278
• fix(metadata): make formatDetection respect true/false properly: #83924
• Upgrade React from b0c1dc01-20250925 to df38ac9a-20250926: #84276
• Add a --webpack flag and default --turbopack to true: #84216
• fix: Update URL resolution logic to handle search parameters on root path /?foo=bar: #78262
• [Breaking] Remove deprecated sync access to Dynamic APIs: #84179
• Move config.turbopack.moduleIds to config.experimental.turbopackModuleIds: #84230
• Show invalid default export errors during prerendering: #84242
• fix: make sure caller exists in babel preset: #84154
• [mcp] allow to enable mcp server through env var: #84278
• fix(metadata): make formatDetection respect true/false properly: #83924
• Upgrade React from b0c1dc01-20250925 to df38ac9a-20250926: #84276
• Add a --webpack flag and default --turbopack to true: #84216
• fix: Update URL resolution logic to handle search parameters on root path /?foo=bar: #78262
• [Breaking] Remove deprecated sync access to Dynamic APIs: #84179
• Turbopack: only write merged manifests when they have been changed: #84261
• Turbopack: add separate turbopackPersistentCachingForBuild/ForDev flags: #84215
• Revert "Add a --webpack flag and default --turbopack to true (#84216)": #84348
• Upgrade React from df38ac9a-20250926 to d15d7fd7-20250929: #84347
• Mark React Compiler integration as stable: #84220
• [cna] Add reactCompiler option: #82251
• Turbopack: remove canary version check for turbopackPersistentCachingForDev: #84277
• [turbopack] Add support for debug_ids: #84319
• Revert "Revert "Add a --webpack flag and default --turbopack to true (#84216)"": #84351
• [Breaking] Remove AMP codemod: #84356
• [Breaking] Remove deprecated built-in AMP: #84312
• auto-enable clientParamParsing and clientSegmentCache w/ cacheComponents: #84250
• [mcp] get server action tool: #84382
• Revert "Revert "Revert "Add a --webpack flag and default --turbopack to true (#84216)""": #84389
• Update otel test assertions and pages span_name: #84393
• [Breaking] Bump minimum TypeScript version to 5.1.0: #84384
• Upgrade React from d15d7fd7-20250929 to ef889445-20250930: #84383
• [Breaking] Remove deprecated unstable_rootParams: #84373
• [metadata] remove falsy dynamicParams approach: #84405
• fix: next rspack binding NextExternalsPlugin: #84303
• Development: Skip route matching when there is an existing match: #84227
• Revert "auto-enable clientParamParsing and clientSegmentCache w/ cacheComponents": #84419
• Upgrade React from ef889445-20250930 to 548235db-20251001: #84416
• [Breaking] Update default browserslist config: #84401
• Upgrade React from 548235db-20251001 to 1bd1f01f-20251001: #84417
• Allow metadataBase to be a string URL in addition to URL instance: #84297
• Upgrade React from 1bd1f01f-20251001 to 86181134-20251001: #84427
• [mcp] logging file should be reset for each session: #84425
• Revert "Revert "Revert "Revert "Add a --webpack flag and default --turbopack to true (#84216)"""": #84394
• Optimize isMetadataRoute function: #84409
• [ci]: split clientSegmentCache test runners off from experimental: #84440
• [Cache Components] Fix caching in generateMetadata/generateViewport: #84228
• Upgrade React from 86181134-20251001 to a757cb76-20251002: #84463
• [segment cache]: fix trailingSlash handling with output: export: #84465
• perf: Use a more aggressive retry loop for recursiveDelete: #84444
• [Cache Components] Dim logs after prerender aborts: #84153
• telemetry track mcp server usage: #84471
• simplify the way we check for turbopack config to ensure we support an empty turbopack object: #84494
• perf: Use synchronous IO when cleaning distDir in next dev and next build: #84472
• Make turbopack the default bundler for custom servers: #84281
• [segment cache]: fix interception route handling: #84497
• Upgrade React from a757cb76-20251002 to 85c427d8-20251003: #84496
• [segment cache]: collectSegmentData should respect experimental.staleTime config: #84520
• Fix potential race condition with request ID in dev mode: #84532
• [test] Enable reactDebugChannel for experimental test shards: #84533
• Simplify Metadata components: #84527
• Implement the updated prerender API shape: #84254
• Upgrade React from 85c427d8-20251003 to 4fdf7cf2-20251003: #84499
• Upgrade React from 4fdf7cf2-20251003 to c7862584-20251006: #84573
• fix(Turbopack): Add better error messaging for when we can't determine Next.js root: #83918
• Allow silencing unhandled rejection filter warnings and improve debugging: #84572
• [MCP] Fix: Do not dedup by URL for MCP get_page_metadata: #84564
• Guard createDebugChannel import by feature flag: #84604
• Build: Add time to logline of every step: #84602
• Upgrade React from c7862584-20251006 to a4eb2dfa-20251006: #84589
• [Cache Components] Schedule work on timeouts: #84344
• [dev] Define request ID for RSC requests on the client: #84605
• fix(cache-tags): add /index to implicit tags and adjust revalidatePath(): #84586
• Build: Highlight TypeScript and ESLint being run clearer: #84606
• [Breaking] Bump sass-loader to v16: #84387
• Update cases for build complete with adapters: #84361
• Turbopack: delete .next folder before throwing due to "pages/app directory must be in the same folder": #84553
• [mcp] change get-project-path to get-project-metadata: #84619
• feat(next/image)!: deprecate and warn on images.domains config: #84625
• feat(next/legacy/image)!: deprecate and warn on next/legacy/image usage: #84622
• Turbopack: improve errors/warnings for turbopack messages: #84552
• Turbopack: rename turbopackPersistentCachingForXXX to turbopackFileSystemCacheForXXX: #84632
• [Segment Cache] Add refresh URL to reused default segments: #84627
• [Segment Cache] Fix tests related to optimistic loading state reuse: #84498
• Upgrade React from a4eb2dfa-20251006 to 3025aa39-20251007: #84613
• [breaking]: enable clientSegmentCache by default: #84643
• feat: Acquire a lockfile on distDir in next dev and next build: #84428
• Add deprecation warning to Runtime config: #84168
• [middleware]: add upper bound to cloneBodyStream: #84539
• Remove automatic linting from build: #83136
• Re-enable legacyBehavior and passHref on Link: #84500
• [cna] Use stable React Compiler: #84660
• Add codemod for middleware to proxy: #84127
• Fix dynamic catchall parameter interpolation in parallel routes: #84279
• feat(breaking): Hard Deprecate PPR Configuration: #84280
• Deprecate middleware and recommend proxy: #84119
• Put native TS resolver for next config under --experimental-next-config-strip-types flag: #84675
• Fix interception route rewrites for nested dynamic routes: #84413
• fix: strip NEXTSEP from interpolated pathnames: #84430
• chore: Remove useless symlink resolution logic in recursive-delete.js: #84582
• breaking(next/image)!: remove 16px from default images.imageSizes config: #84647
• add Statsig Node Core package to Server External Packages: #84157
• Remove bailed out SSG routes from the list of SSG: #83861
• Revert "[Breaking] Skip Next.js internal routes /_next in middleware": #84697
• Bump eslint-plugin-react-hooks to v7: #84669
• Add refresh API to next/cache: #84666
• [Breaking] Require images.localPatterns for query in Image src: #84406
• [Breaking] feat(next/image)!: add support for images.dangerouslyAllowLocalIP and images.maximumRedirects: #84676
• Add new updateTag API and new signature for revalidateTag: #83822
• Add validation for missing default.js in parallel routes: #84702
• misc: allow beta to be triggered: #84713
• Fix tags check for expired/stale: #84717
• tweak middlewareClientMaxBodySize handling: #84712
• docs: Add more details to useLightningcss docs: #84581
• Version gate migration docs link: #84740
• [Cache Components] Allow hiding logs after abort: #84579
• Log Compiled proxy in ...: #84746
• Upgrade React from 3025aa39-20251007 to 9724e3e6-20251008: #84642
• Remove unused eslint-disable directives: #84797
• Use ESLint Flat Config: #84800
• fix missing flight-router-state-tree header normalization: #84718
• Write .next/dev/types/**/*.d.ts to default tsconfig: #84747
• Upgrade React from 9724e3e6-20251008 to ead92181-20251010: #84793
• [mcp] capture next config schema errors: #84832
• feat: using @next/rspack-core: #84221
• Upgrade React from ead92181-20251010 to d7215b49-20251013: #84850
• Turbopack build: Switch to using workerthreads for process: #84818
• [Cache Components] Dev - restart render on cache miss: #84088
• Update font data: #84785
• Fix build compile mode if pages dir does not exist in Next.js 16: #84783
• improve next config schema validation errors: #84847
• Upgrade React from d7215b49-20251013 to 56e84692-20251014: #84860
• warnOnce for Middleware deprecation: #84862
• Add codemod for Middleware API to Proxy API: #84824
• Deprecate Middleware API and add Proxy API: #84764
• remove clientParamParsing configuration & bundle it with cacheComponents: #84763
• remove dynamicIO flag: #84872
• Bump eslint-plugin-react to 7.37.0: #84876
• Add nextjs condition when cacheComponents is enabled: #84843
• remove rdcForNavigations configuration & bundle with cacheComponents: #84870
• Convert eslint-config-next project to TypeScript: #84839
• [eslint-config] [Breaking] Use Flat config by default: #84874
• [Cache Components] Remove unstable prefix from unstable_cacheLife: #84877
• fix: always use the safe stable stringify: #84909
• [Cache Components] Fix cacheSignal in dev render: #84846
• [dev-overlay] Never dedupe errors with different names or messages: #84908
• Remove deprecated experimental_ppr route-level configuration: #84871
• Include server latency in debug info: #84580
• Fix parallel routes ignoring generateStaticParams from primary route: #84889
• Revert "Include server latency in debug info": #84932
• Development: Use process.hrtime for request time calculation: #84905
• Use correct JSX runtime for library-owned JSX in React Server: #84869
• Development: Implement request log time details: #84906
• [Cache Components] Remove unstable prefix from unstable_cacheTag: #84880
• [Cache Components] separate runtime stage in dev render: #84644
• Reland "Include server latency in debug info": #84950
• Update codemod ESLint template to Flat config: #84919
• Upgrade React from 56e84692-20251014 to 93f85932-20251016: #84963
• [dev] Fix Middleware and Proxy file conflict: #84965
• stabilize experimental.enablePrerenderSourcemaps: #84916
• Stop manually setting stacktrace limit: #84968
• Turbopack: respect --profile CLI param: #84920
• Relax default.tsx validation for parallel routes leaf segments: #84767
• Add codemod for removing unstable_ prefix: #84974
• Interception routes match from nested route navigation: #84898
• [Cache Components] Allow unstable prefix for cacheLife and cacheTag: #84934
• Relax default.tsx validation for parallel routes leaf segments: #84767
• Add codemod for removing unstable_ prefix: #84974
• Interception routes match from nested route navigation: #84898
• [Cache Components] Allow unstable prefix for cacheLife and cacheTag: #84934
• Add codemod for removing experimental_ppr: #84979
• fix: throw error during build when invalid export for Proxy: #84886
• [cache components]: prevent expired entries from being served: #84975
• Delete old prefetch cache related code: #84977
• docs: Deprecation of Middleware: #84710
• Add rendered search to router state: #84983
• [segment cache]: delay revalidation prefetch pings 300ms: #84981
• Show relative path from cwd for Proxy Middleware file conflict error: #84993
• [Cache Components] fix docs for cacheLife("seconds"): #85004
• Rename MiddlewareMatcher to ProxyMatcher: #85005
• [Breaking] Rename instrumentation onRequestError context.routeType from middleware to proxy: #85006
• [turbopack] Prevent accidental access to .next: #84714
• fix: incorrect canonicalUrl set when using output: export: #85019
• Add Activity name to route layouts and pages: #85011
• Update next-lint-to-eslint-cli to support FlatCompat.config: #85026
• [cache components]: move flag out of experimental: #85035
• [Cache Components] When caches are disabled in dev skip the cache warmup: #85014
• [Cache Components] Use canary React when only Cache Components is enabled: #85042
• Turbopack: Remove unneeded warning for telemetry: #85039
• [cache components] stabilize cacheLife profiles: #85050
• [cache components] show when cache components is enabled in the CLI: #85047
• [cache components]: show cache components enabled in DevTools: #85048
• [Cache Components] correctly label IO promises in devtools: #84928
• Plumbing for cache indicator: #84955
• Upgrade React from 93f85932-20251016 to 1324e1bb-20251016: #84999
• enable mcp server by default: #85058
• Add comment that we expect the function passed to bind to be anonymous: #85070
• Development: Addres comments on request log PR: #84945
• Development: Implement request time for Pages Router: #85012
• [cache components] add cache components indicator to dev start: #85069
• cli: build partial entries --debug-build-paths arg: #85052
• Turbopack: Better error for sassOptions.functions as it's unsupported: #85073
• Upgrade React from 58bdc0bb-20251019 to f6a48828-20251019: #85081
• [devtools]: instrument client navigation hooks for suspense devtools: #85007
• Remove Segment from CacheNodeSeedData: #85080
• label as Prefetch/Prefetchable depending on prefetch config: #85076
• [cache components]: add 'bypass' cache indicator status: #85082
• Upgrade React from f6a48828-20251019 to 2bcbf254-20251020: #85112
• [cache components]: guard against setCacheStatus since its conditionally defined: #85125
• warn: add deprecation warning of eslint config: #85122
• add new devtools indicator loading state: #85083
• Await initial Flight response before hydrating: #85124
• fix(experimental.lockDistDir): Acquire the lock in dev earlier: #85116
• telemetry: mcp tool call: #85120
• [Turbopack] dedupe build errors: #85062
• Fix subtree layout alignment for route summary in next build: #85137
• [codemod] Remove runtime config when running middleware-to-proxy: #85075
• [turbopack] Improve the multiple bundler flags messge to note that perhaps your package.json is the problem: #85118
• Add Learn more docs to Middleware deprecation warning: #84711
• [BF Cache]: skip lazyData fetch logic for inactive segments: #85142
• Pass startTime to initial RSC payload stream: #85144
• guard navigation use hooks for React 18: #85151
• [turbopack] Don't warn on the lightning css experimental option: #84913
• Turbopack: Remove redundant log line, increase delay for compiling log message: #85133
• Make params and searchParams new Promises: #85158
• Name "cache" streams for React DevTools: #85159
• Use cacheMaxMemorySize config in default cache handler: #85153
• Omit params to from client segments: #84883
• enable experimental.routerBfCache behind cacheComponents: #84923
• [Cache Components] Allow stale longer than expire in cacheLife: #85115
• Update Activity names given to routes: #85155
• use port zero for --inspect when forking, if used by parent: #85128
• Update blocking prerender error message: #85087
• Fix: CSS asset URLs broken with experimental.inlineCss: #85140
• Update routes generation for build-complete: #85017
• [cache components] move experimental.cacheHandlers out of experimental: #85157
• Don't assign displayName to the internal Promises: #85178
• Assign name to hydration stream: #85179
• fix: add backwards compat for middleware → proxy field renames: #85183
• [turbopack] Implement improved deobfuscation for free calls and module identifiers.: #85060
• Improve Proxy invalid export error message: #84887
• Fix Activity boundary names: #85185
• [codemod] Install ESLint v9 if version under for next-lint-to-eslint-cli: #85182
• [upgrade] Version gate adding --turbopack flag: #85180
• Tweaks to blocking route error message: #85191
• Remove layout-router sticky/fixed debug warning: #85193
• [cache components] persist cache bypass UI until it's disabled: #85190
• Only allow node runtime in proxy: #85139
• logger: skip logging full element: #85194
• Fix: CSS asset URLs broken with experimental.inlineCss: #85140
• Update routes generation for build-complete: #85017
• [cache components] move experimental.cacheHandlers out of experimental: #85157
• Don't assign displayName to the internal Promises: #85178
• Assign name to hydration stream: #85179
• fix: add backwards compat for middleware → proxy field renames: #85183
• [turbopack] Implement improved deobfuscation for free calls and module identifiers.: #85060
• Improve Proxy invalid export error message: #84887
• Fix Activity boundary names: #85185
• [codemod] Install ESLint v9 if version under for next-lint-to-eslint-cli: #85182
• [upgrade] Version gate adding --turbopack flag: #85180
• Tweaks to blocking route error message: #85191
• Remove layout-router sticky/fixed debug warning: #85193
• [cache components] persist cache bypass UI until it's disabled: #85190
• Only allow node runtime in proxy: #85139
• logger: skip logging full element: #85194

Example Changes

• docs: Convert relative imports to @ aliases in examples: #83813
• chore: add example with oxlint: #83842
• fix: correct typo 'incomming' to 'incoming' in with-mqtt-js example: #83887
• chore: improve oxlint example: #83898
• docs: update Dockerfile to use node:lts-alpine instead of node:18-alpine: #84229
• Use Array.from to avoid @ts-ignore when copying i18n.locales: #82148
• examples: Remove AMP example: #84355
• [docs] fix(with-supabase): Update README env variables: #84745

Misc Changes

• Turbopack: remove css_environment from Environment: #83487
• Turbopack: Don't add client_runtime_entries to Route Handler compilation: #83655
• Turbopack: Only load capsize-font-metrics once: #83654
• [CI] Fix GitHub Actions matrix configuration for React versions: #83677
• fix(Turbopack): Enable scope hoisting for large files or module counts: #83399
• [turbopack] Lazily construct resolved::Requests for EsmAssetReference: #83662
• Update content-security-policy.mdx, fix development environment error: #83665
• tests: disable flaky deployment test while investigating upstream: #83705
• [test] Update snapshots for Rspack + React 18: #83712
• Docs/sep paper cuts: #83689
• [Turbopack] Remove ssr-data module context: #83626
• CI: use KV for test timing data: #83745
• Emit build error when 'use cache' directive is misspelled: #83756
• docs(metadata): align default function export name with file name: #83796
• [turbopack] Remove the should_track_children parameter of the turbo tasks backend: #83258
• docs(data-security): add bun package manager example: #83735
• Update next-intlayer reference in i18n doc: #83761
• Update Rspack production test manifest: #83790
• Update Rspack development test manifest: #83791
• Turbopack: chunking debugging utilities: #83801
• Removed link to maintain text consistency: #83644
• Turbopack: rename some fields in fs: #83808
• Turbopack: validate CSS without computing all paths: #83810
• [test] Disable flaky navigation test: #83828
• docs: Type narrowing using LayoutProps, PageProps: #83692
• docs: implications of mutating cookies in server actions: #83691
• Only retry if canary fails on required jobs: #83851
• docs: Fix self-referential link to Middleware in middleware.mdx: #83854
• Update Rspack production test manifest: #83826
• Update generate-metadata.mdx: #81853
• Turbopack: remove lazy invalidated tasks: #83845
• Turbopack: remove Backend TaskState: #83846
• Turbopack: don't recompute empty parse results: #83883
• Turbopack: delete broken hmr benchmark: #83882
• Turbopack: only generate error string in error case: #83884
• docs: the as prop is still available in Pages Router: #83864
• Turbopack: map_module_batch: #83885
• Turbopack: Change run once signature to avoid exposing TaskId: #83844
• docs: Update command to use npx for tracing files: #83903
• Turbopack: ModuleGraphRef: #83890
• Update Rspack development test manifest: #83876
• Turbopack: make graph traversal sync: #83891
• chore: Fix test snapshot: #83901
• Update Rspack production test manifest: #83877
• docs: add next.config.ts Node.js native resolver: #83561
• Turbopack: add turbo_tasks::run to run in turbo tasks scope without a task: #83847
• Turbopack: fix double codegen of some merged modules: #83886
• Turbopack: add traces to merged module computation: #83908
• Turbopack: RuleCondition support resourceQuery contains: #83468
• fix: add the missing comma in the document example: #83932
• Turbopack: Document the reasons for the current design of parse_segment_config_from_source: #83919
• Turbopack: extract parse_source_map_comment: #83938
• Turbopack: enable nodelay for node.js pool socket: #83942
• feat: next-rspack-binding: #82811
• Only send notification if canary fails on required jobs: #83953
• Turbopack: allow to read State from turbo_tasks::run: #83955
• Fix conclusion check for retry_test workflow: #83960
• Add Descope to Auth libraries list: #83968
• [turbopack] Track task durations in the task_statistics file: #83522
• [turbopack] Remove the issue_path feature and related functionality: #83920
• Turbopack: use turbo_tasks::run in next.js to avoid task memory leak: #83848
• Update Rspack production test manifest: #83934
• Update Rspack development test manifest: #83933
• Turbopack: add test case that checks memory leak: #83849
• Turbopack: read project strongly consistent in project_update: #83974
• Fix output comparison when checking conclusion of required jobs: #83986
• Turbopack: JsAnalyzer parse AssignExpr: #83962
• Turbopack: less eager manifest generation: #83736
• Turbopack: use depth as priority for merged module info: #83909
• Turbopack: "connect" tasks in turbo_tasks::run too: #83975
• Update Rspack production test manifest: #83979
• Update Rspack development test manifest: #83980
• Turbopack: Make transient tasks root tasks too when called in turbo_tasks::run: #83976
• Turbopack: trace state changes: #83977
• [turbopack] cleanup analyzer: #83983
• [Turbopack] Fix AST traversal for this in function default parameters: #83746
• [turbopack] Consolodate logic for visiting functions to simplify state management: #82763
• [turbopack] Track the scope in which variables are assigned: #82845
• [turbopack] Set liveness of exports based on assignment analysis: #82802
• Turbopack: trace all state changes: #84053
• docs: We have dropped the CORS example linked: #84065
• docs: add pageExtensions note to Middleware and clarify default filename: #84045
• Fix TypeScript type error in example code: #84041
• Turbopack: fix test case and update project_update to turbo_tasks::run too: #83978
• Turbopack: run tests with multiple threads: #84074
• Turbopack: flush Node.js worker IPC on error: #84077
• Turbopack: parallelize scope hoisting computation: #83904
• Add test for JS resource size on navigation: #83731
• Update Rspack development test manifest: #84061
• Update Rspack production test manifest: #84060
• Turbopack: Document automatic Babel config support: #84002
• docs: Fix the title/path of the turbopack page on pages router: #84001
• Turbopack: remove references from ChunkData: #84076
• Turbopack: include availability hash in the ident of evaluated chunks groups: #84082
• [turbopack] s/analyse/analyze/g: #84112
• [Turbopack] avoid attaching referenced output assets to chunks: #75933
• fix(docs): Fix links in UPGRADING.md: #84114
• docs: improve dynamic routes example in project structure page: #84086
• docs: onRequestError request header type: #83988
• Turbopack: Improve persistent caching test case: #83205
• Turbopack: add more details to the graph panic: #84126
• docs: Cookies store access is async: #83987
• Bump Rust to nightly-2025-09-21: #83415
• Upgrade CodSpeed action and add analyzer benchmarks: #84135
• Turbopack: fix run_once when returning error: #84142
• [turbopack] Conditionally collect affecting sources: #83921
• Turbopack: slightly improve resolve_source_map_sources: #84147
• Turbopack: RawEcmascriptModule: #81806
• Turbopack: add more details to the graph panic: #84143
• test: split app-middleware test per describe: #84130
• Update Rspack development test manifest: #84117
• script: improve release log generation: #83686
• Turbopack: split task_execution_completed into multiple methods: #84170
• Turbopack: only generate field if spans are enabled: #84184
• Turbopack: support more dynamic request with import map: #84178
• [turbopack] defer a value_to_string operation until we need it: #84188
• Update Rspack production test manifest: #84165
• Revert "[turbopack] Set liveness of exports based on assignment ana…: #84207
• Turbopack: increase retry duration, reduce busy looping when there is other work: #84171
• Turbopack: Try to avoid block_in_place in scope: #84172
• [turbopack] Remove some bitmap clones: #84193
• Turbopack: lazier manifests, part deux: #84191
• Turbopack: avoid panic on updating output when a task was cancelled: #84214
• docs: nav_title for long unbroken words: #84233
• Turbopack: Use RawValue for mappings inside SourceMapJson: #84208
• Update Rspack development test manifest: #84218
• Turbopack: fix NFT of readFileSync of relative path: #84155
• Turbopack: improve references benchmark: #84223
• Update Rspack production test manifest: #84217
• Turbopack: drop ASTs when only tracing: #84185
• docs: Include more detailed instructions on excluding from common AV solutions, including macOS Gatekeeper: #84206
• Turbopack: trace fs-extra calls: #84246
• [test] Overhaul Undefined default export test suite: #84235
• Turbopack: Scope with work queue: #84225
• [test] Make Undefined default export an e2e test suite: #84240
• [turbopack] Conditionally create pages router data endpoints.: #84194
• Turbopack: parallel connect children: #84173
• Turbopack: count turbo_tasks::run as foreground tasks to avoid being idle: #84245
• Turbopack: make persistent caching log line more clear: #84262
• Turbopack: make tracing nicer: #84263
• docs:Small improvement on the contribution guide for clarity: #84200
• Turbopack: Remove not-very-useful "Finished writing to disk in" log line: #84244
• Turbopack: follow up changes from parallel children: #84219
• [turbopack] Simplify take_issues and peek issues: #84199
• Update Rspack development test manifest: #84260
• Update Rspack production test manifest: #84259
• Turbopack: Scope with work queue: #84225
• [test] Make Undefined default export an e2e test suite: #84240
• [turbopack] Conditionally create pages router data endpoints.: #84194
• Turbopack: parallel connect children: #84173
• Turbopack: count turbo_tasks::run as foreground tasks to avoid being idle: #84245
• Turbopack: make persistent caching log line more clear: #84262
• Turbopack: make tracing nicer: #84263
• docs:Small improvement on the contribution guide for clarity: #84200
• Turbopack: Remove not-very-useful "Finished writing to disk in" log line: #84244
• Turbopack: follow up changes from parallel children: #84219
• [turbopack] Simplify take_issues and peek issues: #84199
• Update Rspack development test manifest: #84260
• Update Rspack production test manifest: #84259
• [test] Ignore pnpm update notifier: #84328
• [test] Stop downloading unused test browsers when generating PR stats: #84329
• docs: remove repeated to: #84325
• Turbopack: Use more robust logic for absolute and percent-encoded URLs in source maps received from loaders: #84255
• Turbopack: only replace edge dynamic calls in dev: #84354
• [turbopack] Remove a bunch of dead code from the source map implementation: #84318
• Turbopack: prevent duplicate NFT modules: #84369
• docs: Remove AMP docs: #84357
• docs: Type helpers don't need to be imported: #84265
• Turbopack: Add docs for debugIds option: #84375
• Remove references to size metrics in next build from our docs: #83823
• Bump to swc v42: #83477
• Turbopack: skip invalidating a task on cell/output change when the dependency is outdated: #84376
• Turbopack: trace module.createRequire: #84335
• Update failing e2e deploy tests: #84395
• Turbopack: Webpack loader this.fs.readFile: #83313
• Improve tests: #84374
• Revamp Next.js boilerplate: #81945
• Add test for twoslash: #84267
• Docs/project structure polish: #84386
• Bump to swc v44: #84420
• Turbopack: don't fail for parse errors in tracing: #84408
• Update Rspack development test manifest: #84365
• Update Rspack production test manifest: #84366
• [ci]: remove PPR-specific CI jobs: #84439
• docs: Verbose troubleshooting for unconfigured hosts: #84271
• Update Rspack production test manifest: #84398
• Add gt-next to i18n list: #84396
• [ci]: fix build-output-prerender to support segment cache env: #84467
• [ci]: fix app-static snapshots with clientSegmentCache: #84468
• Turbopack: Only benchmark file IO on next dev: #84474
• Turbopack: improve incremental build performance when deployment id changes: #84460
• fix: Missing link in Lazy Loading docs: #84473
• docs: simplify streaming metadata: #84253
• make withRspack idempotent: #84482
• Turbopack: Use strongly consistent reads in random_change unit test: #84505
• Update Rspack development test manifest: #84480
• Update Rspack production test manifest: #84481
• [ci]: remove test from segment cache manifest: #84507
• [ci]: de-flake client cache test: #84517
• Revert "Turbopack: skip invalidating a task on cell/output change when the dependency is outdated": #84526
• next mcp router
• Revert "next mcp router"
• test: Use nextTestSetup in scss tests: #84501
• [turbopack[ Use the configured hasher to implementh Hash for AutoMap and AutoSet: #84542
• Turbopack: debug ids for server chunks: #84557
• CI: Enable experimental.isolatedDevBuild for test-unit: #84559
• [test]: convert prefetching tests to be segmentCache compatible: #84521
• CI: Enable experimental.isolatedDevBuild for test-prod: #84556
• Add .next/dev/types to CNA templates tsconfig include: #84566
• CI: Enable experimental.isolatedDevBuild for test-integration: #84558
• Update Rspack development test manifest: #84548
• Add a webpack flag to create next app. Ensure that if you set it or decline turbopack we set the --webpack flag on the generated project: #84476
• Update Rspack production test manifest: #84549
• CI: Enable experimental.isolatedDevBuild for test-dev: #84562
• [test] Unflake static image test: #84535
• Turbopack: Lower the IO concurrency limit in CI tests: #84508
• Add documentation for experimental adapters handling: #83737
• Turbopack: improve next/dynamic eventual consistentcy: #84560
• fix hidden errors in router-act: #84603
• fix(cna): use correct postcss plugins syntax: #79949
• Turbopack: absolute requests in webpack loader: #84575
• Update Rspack development test manifest: #84592
• Update Rspack production test manifest: #84593
• Turbopack: Remove workaround in hyper for rustc miscompilation bug on macos intel: #84578
• Turbopack: add manual worker count override: #84454
• Turbopack: don't ignore TS parse errors: #84597
• Add middleware to routes order doc: #84618
• [create-next-app]: prompt to use recommended options: #84570
• Update labeler: #84623
• Turbopack: use mmap advise to help the OS preloading: #84379
• Turbopack: skip invalidating a task on cell/output change when the dependency is outdated: #84551
• Turbopack: follow-up changes from untracked tracing: #84629
• Turbopack: sourcemaps for JSON modules: #84611
• Turbopack: avoid race condition when updating cells: #84598
• docs: update core documentation for Turbopack as default bundler: #84282
• Update Rspack development test manifest: #84631
• [turbopack] Only send the filesystem caching timing messages for slow events: #84646
• docs: experimental.isolatedDevBuild: #84656
• docs: add note clarifying project root in monorepo: #84628
• Fix flakey overlay feedback test: #84662
• [ci]: update flake detection to only run in Turbopack: #84659
• [ci]: move router-act to top level testing utils: #84653
• [tests]: de-flake client-cache.parallel-routes.test.ts: #84655
• [create-next-app]: add eslint to default template: #84661
• Update Rspack production test manifest: #84630
• [test] Assert on stable error codes: #84671
• Turbopack: convert HashMap to IndexMap for deterministic tasks: #84641
• Add note about $ACTION_ properties, remove reference to .entries(): #84459
• Fix typo on welcome page: #84715
• Rspack: Fix lockfile test on rspack: #84707
• [turbopack] Emit a warning when there are too many matches from a FileSourceReference: #84701
• Update beta tag: #84725
• [next-codemod] fix: Set codemod version to the first introduced version: #84726
• [next-upgrade] misc: update comment: #84727
• Turbopack: use vector instead of hash map: #84696
• Revert "docs: nav_title for long unbroken words (#84233)": #84346
• [turbopack] tweak the doc on the inner graph optimization: #84752
• [turbopack] Fix a few references to caching configuration as it is no longer canary guarded: #84761
• Add 16.0.0-beta.0 to next/third-parties peerDeps: #84741
• [eslint-plugin] Remove eslint-v8 testing: #84721
• Update Rspack production test manifest: #84729
• Update Rspack development test manifest: #84730
• fix: release next-rspack ci: #84673
• [cna] Preserve existing config option when enabling React Compiler: #84663
• Prevent failing types-and-precompiled from corrupting terminal output: #84799
• Update test/CNA templates React version to 19.2.0: #84736
• Turbopack: use the same serialization method for lookup as for storing: #84765
• Turbopack: update petgraph: #84757
• [turbopack] Issue 'too many matches' warning for DirAssets also: #84768
• Revert "Fix flakey overlay feedback test": #84819
• [test]: de-flake client-cache.original.test.ts: #84831
• [ci]: set NEXT_TEST_VERSION to release tag for deploy tests: #84840
• docs: soft 404's, Suspense and loading.tsx: #83867
• [turbopack] Discuss Core Web vitals in our bundle size gap docs: #84837
• [turbopack] document missing webpack loader features: #84849
• [turbopack] fix typo in docs: #84868
• [turbopack] Remove the implementation of TaskInput from AutoSet: #84867
• Update turborepo env in workflows: #84879
• Turbopack: take task cache log before starting snapshot: #84755
• Turbopack: allow gzip compression on trace files: #84685
• Turbopack: process task result as part of the task completion: #84638
• Add test for eslint-config-next: #84838
• Turbopack: lower level drop collectibles: #84895
• docs: next/dynamic headings: #84492
• Turbopack: expose client static assets correctly: #84695
• Turbopack: better errors for strip_prefix_len: #84882
• Turbopack: improve missing factory message: #84881
• CNA: Update template to use ESLint Flat config: #84917
• fix: process.env.TURBOPACK maybe undefined: #84885
• Turbopack: fix spacing on EcmascriptModuleAssetType: #84915
• Update Rspack development test manifest: #84890
• Update Rspack production test manifest: #84891
• Fix url-imports test: #84922
• Turbopack: fix pageExtensions precedence: #84926
• Turbopack: fix client reference order for shared references: #84760
• Turbopack: turn panic into bail: #84927
• Docs/sync with new features 0: #84861
• Turbopack: transpile runtime with swc: #84931
• docs: x-nextjs-stale-time header: #84901
• docs: Templates on navigation: #84493
• Docs/sync with new features 0: #84861
• Turbopack: transpile runtime with swc: #84931
• docs: x-nextjs-stale-time header: #84901
• docs: Templates on navigation: #84493
• chore: Attempt to fix ppr-partial-hydration flakiness: #84672
• Update Rspack production test manifest: #84939
• Turbopack: rename Persistent Caching: #84896
• Turbopack: Add ChunkedVec test case: #84756
• docs: Add missing codemod docs: #84980
• Update prefetching.mdx providing more clarity on the usage of router.prefetch(): #84903
• docs: getting started installation and next lint removal: #84781
• docs: Split "Get Started: Route Handlers and Middleware" to Route Handlers and Proxy: #84708
• docs: Replace Middleware docs to Proxy: #84709
• chore: Remove redundant copy of rust reqwest crate: #84982
• [turbopack] Allow withRspack to work even if you already have NEXT_RSPACK set: #84987
• Turbopack: Track errored tasks as dependency when using untracked(): #84914
• Turbopack: shard amount need to grow quadratic to cpu count to keep propability of conflicts constant: #84921
• Turbopack: fix race condition when adding dependencies: #84946
• Turbopack: make tracing warning not fail build: #85032
• [ci]: increase number of runners for test jobs: #85049
• add a message about Turbopack tracing: #85044
• Turbopack: Implement next/font/local declarations option: #85051
• docs: experimentalClientMaxBodySize: #85105
• Docs: Add --debug-build-paths next build option: #85097
• Docs: Add note on tag limits for cacheTag: #85106
• docs: no switcher for TS only examples: #85109
• fix: Handle non-directory files in cache folder when performing cleanup: #84930
• Turbopack: Suggest using system certs when a TLS error occurs: #85009
• [turbopack] Try to fix v8 crashes on github actions: #85114
• docs: Update to Zod v4 syntax: #84807
• Docs: Add version history for next lint deprecation and update error message: #85100
• Turbopack: improve module evaluation name: #84633
• [test] Current behavior of dynamic APIs integration with React DevTools: #85111
• [Cache Components] fix env labels in perf track test: #85132
• Turbopack: Disable LightningCSS MediaRangeSyntax feature: #85086
• Don't expliclitly set the --turbopack flag in Create Next App, it is no longer necessary: #85117
• [turbopack] Remove the canary icon from the cache components docs: #85149
• Bump swc to v45: #85143
• [test] Fix test-dev with --projects: #85167
• [test] Update snapshots: #85171
• docs: mcp: #85010
• Docs: Explain Sass tilde import difference: #85041
• Turbopack: don't fail on export type in use server: #85054
• Turbopack: speedup module merging: #85043
• docs: remove experimental_ppr route segment config: #85188
• Rename "blocking route" error docs page: #85189
• docs: upgrade from 15 to 16: #85176
• Docs: Explain Sass tilde import difference: #85041
• Turbopack: don't fail on export type in use server: #85054
• Turbopack: speedup module merging: #85043
• docs: remove experimental_ppr route segment config: #85188
• Rename "blocking route" error docs page: #85189
• docs: upgrade from 15 to 16: #85176

Credits

Huge thanks to @mischnic, @timneutkens, @unstubbable, @wyattjoh, @Cy-Tek, @lukesandberg, @OoMNoO, @ztanner, @icyJoseph, @huozhi, @gnoff, @ijjk, @povilasv, @dwrth, @obendev, @aymericzip, @devjiwonchoi, @SyMind, @vercel-release-bot, @Shireee, @eps1lon, @dharun36, @kachkaev, @bgw, @yousefdawood7, @TheAlexLichter, @sokra, @ericx0099, @leerob, @Copilot, @fireairforce, @fufuShih, @anvibanga, @hayes, @Milancen123, @martinfrancois, @lubieowoce, @gaojude, @lachlanjc, @liketiger, @styfle, @aaronbrown-vercel, @Samii2383, @FelipeChicaiza, @kevva, @m1abdullahh, @F7b5, @Anshuman71, @RobertFent, @poteto, @chloe-yan, @sireesha-siri, @brian-lou, @joao4xz, @stefanprobst, @samselikoff, @acdlite, @gwkline, @bgub, @brock-statsig, @karlhorky, @feedthejim, @CarloQuick, @greguintow, @hallucinogenizer, @sebmarkbage, @delbaoliveira, @makandrr, @seeplusplus, and @serhalp for helping!