Next.js

Misc Changes

• Improve "make root node" trace attributes: #92941
• CI: Track SWC native binary size in PR stats comment: #92938

Credits

Huge thanks to @sokra for helping!

Core Changes

• Support more prefetch configuration options: #92859
• Improve deduping of concurrent 'use cache' invocations: #91830
• [partial fallbacks]: include prefetch requests in shell upgrade handling: #92894
• Redesign blocking route dev overlay and build errors: #92638
• Switch to cargo-binstall and pre-built sccache binaries: #92911
• Remove prefetch from instant config: #92761

Misc Changes

• Fix flake in rewrites-manual-href-as test: #92948
• docs: amends to preserving-ui-state guide: #92270

Credits

Huge thanks to @gnoff, @unstubbable, @ztanner, @aurorascharff, @mmastrac, and @icyJoseph for helping!

Core Changes

• fix(next/image): ensure images.maximumResponseBody applies to local images too: #92920
• Refactor trace server sort to SortMode enum (execution order / value / name): #92873
• Perf: Simplify static metadata handling: #92630
• remove flag guarding unstable_io: #92923

Misc Changes

• [ci] Cache passing test results so CI retries skip them: #92832
• fix accidental test duplication: #92922
• rename MagicAny: #92918
• turbopack: reduce EffectStateStorage memory by storing u128 content hashes: #92902
• turbo-trace-server: reduce allocation overhead when loading large trace files: #92896
• Turbopack: optimize SelfTimeTree performance, memory usage, and fix range query boundaries: #92931
• [ci]: fix backport sync script: #92942

Credits

Huge thanks to @styfle, @mmastrac, @ztanner, @lukesandberg, @sokra, @timneutkens, and @gnoff for helping!

Core Changes

• Support type cast expressions in page static info extractor: #92837
• Fix dev mode hydration failure when page is served from HTTP cache: #92892
• [devtools] Preserve full code frames in browser overlay: #92621
• Enable prefetchInlining by default: #92863
• Replace deprecated moduleResolution: "node": #92654

Misc Changes

• turbo-tasks: add info_span for blocking waits during task restore: #92878
• Turbopack: Use an async lock in the filesystem watcher: #92906
• [ci] Skip Playwright system deps install on subsequent self-hosted runs: #92893
• turbo-tasks: Reduce allocations on cache hits: #92756
• CI: Remove dead yarn support from next-stats-action: #92587

Credits

Huge thanks to @mischnic, @sokra, @unstubbable, @aurorascharff, @acdlite, @bgw, @mmastrac, @eps1lon, and @lukesandberg for helping!

Core Changes

• Allow overriding outputHashSalt in modifyConfig: #92856

Misc Changes

• Turbopack: Use lld again on ARM64 glibc Linux: #92860
• [ci]: add workflow to bump canary after backport: #92801
• turbopack: cache TransformPlugin in narrow-scoped turbo-tasks functions: #92842

Credits

Huge thanks to @bgw, @ztanner, @sokra, and @mischnic for helping!

Core Changes

• fix(trace-server): default MCP port to --port + 1 to avoid conflicts: #92831
• Revert "Node.js streams: Add forkpoint for prerenderToStream": #92845
• Warn for non-deterministic "use cache" args during final prerender: #92820

Misc Changes

• Share native binaries via GitHub artifacts: #92758
• Turbopack: shorter error message for ModuleBatchesGraph::get_entry_index: #92828
• Turbopack: refactor export analysis: #92781
• [ci] Skip sccache on Windows runners: #92847
• Turbopack: remove StarImportAnalyzer: #92830
• Turbopack: analyzer improvement followups: #92834
• Update Rspack production test manifest: #92674
• Update Rspack development test manifest: #92673
• Turbopack: move assignment_scopes computation into ImportMap: #92835
• docs: restructure instant nav guide for clarity: #92684
• docs: add documentation for no-typos ESLint rule: #92809

Credits

Huge thanks to @mmastrac, @sokra, @mischnic, @timneutkens, @vercel-release-bot, @unstubbable, @icyJoseph, and @MukundaKatta for helping!

[!NOTE] This release is backporting bug fixes. It does not include all pending features/changes on canary.

Core Changes

• chore: Bump reqwest to 0.13.2 (Fixes Google Fonts with Turbopack for Windows on ARM64) (#92713)
• Turbopack: fix filesystem watcher config not applying follow_symlinks(false) (#92631)
• Scope Safari ?ts= cache-buster to CSS/font assets only (Pages Router) (#92580)
• Compiler: Support boolean and number primtives in next.config defines (#92731)
• turbo-tasks: Fix recomputation loop by allowing cell cleanup on error during recomputation (#92725)
• Turbopack: shorter error for ChunkGroupInfo::get_index_of (#92814)
• Turbopack: shorter error message for ModuleBatchesGraph::get_entry_index (#92828)
• Adding more system info to the 'initialize project' trace (#92427)

Credits

Huge thanks to @Badbird5907, @lukesandberg, @andrewimm, @sokra, and @mischnic for helping!

Core Changes

• webpack: fix swcPlugins with relative paths: #92770
• Node.js streams: Add forkpoint for logMessagesAndSendErrorsToBrowser: #92510
• Node.js streams: Add forkpoint for createCombinedPayloadStream: #92511
• Node.js streams: Add forkpoint for renderWithRestartOnCacheMissInValidation: #92512
• Node.js streams: Add forkpoint for prerenderToStream: #92513
• Perf: Fast path for trace() when opentelemetry is not enabled: #92678

Misc Changes

• turbopack: gate ValueDebugFormat and ValueDebug behind debug_assertions: #92628
• Add TurboMalloc::thread_park() to flush and collect on thread park: #92804
• Stop using deprecated baseUrl: #92653
• Turbopack: Use FrozenMap for module export information: #92802
• pr-status: Show all participants in review thread overview: #92730
• docs: draftMode alignment: #92794
• Turbopack: remove webpack chunk detection: #92773
• Turbopack: refactor ESM codegen generation: #92777
• Fix monorepo @next/swc binary postinstall: #92813
• Turbopack: shorter error for ChunkGroupInfo::get_index_of: #92814
• Turbopack: properly set NODE_ENV for SWC plugins: #92579

Credits

Huge thanks to @sokra, @eps1lon, @bgw, @icyJoseph, @mischnic, and @timneutkens for helping!

Core Changes

• Scope Safari ?ts= cache-buster to CSS/font assets only (Pages Router): #92580
• Enable wasm plugins on windows arm: #92544
• prefetchInlining: fix build crash on notFound() pages: #92806

Credits

Huge thanks to @lukesandberg and @acdlite for helping!

Misc Changes

• Fix devlow-bench: tsconfig rootDir mismatch with package.json bin: #92800

Credits

Huge thanks to @mmastrac for helping!

Misc Changes

• Fix turbo cache flag: use --force: #92796

Credits

Huge thanks to @mmastrac for helping!

Core Changes

• Ensure x-nextjs-data header is only set during resolve: #92752

Credits

Huge thanks to @ijjk for helping!

Core Changes

• Exclude trace files from directory deletion in builds: #92486
• Switch segment prefetch cache miss response from 204 to 404: #92751

Misc Changes

• Re-enable sccache: #92746

Credits

Huge thanks to @lukesandberg, @mmastrac, and @acdlite for helping!

Core Changes

• Fix prefetch hints not being loaded during revalidation: #92625

Credits

Huge thanks to @acdlite for helping!

Core Changes

• Update font data: #92704
• test: use Turborepo pack task for test isolation: #92575
• Compiler: Support boolean and number primtives in next.config defines: #92731
• Upgrade React from 404b38c7-20260408 to fef12a01-20260413: #92728
• Revert "refactor: write pages router export files directly to server/pages/": #92733

Misc Changes

• [test] Stop using baseUrl: #92469
• Turbopack: properly remove unused TS enums with scope hoisting: #88205
• bench: improve render pipeline benchmark reliability: #92715
• bench: add A/B branch comparison workflow to BENCHMARKING.md: #92721
• docs: fix broken bun.sh Nextjs documentation link: #92698
• fix(server-actions): skip type-only ExportNamed in pre-pass to prevent phantom registerServerReference: #92494
• Turbopack: Add import.meta.glob support (Vite compat): #92640
• turbo-tasks: Fix recomputation loop by allowing cell cleanup on error during recomputation: #92725
• chore: Bump reqwest to 0.13.2 (Fixes Google Fonts with Turbopack for Windows on ARM64): #92713
• TURBOPACK: support crsossOriginLoading: #92070

Credits

Huge thanks to @vercel-release-bot, @eps1lon, @mischnic, @timneutkens, @hamedniroomand, @sleitor, @sokra, @Badbird5907, @fireairforce, and @andrewimm for helping!

Core Changes

• Node.js streams: Add forkpoint for error recovery: #92457

Misc Changes

• Delete some dead turbo task functions: #92596
• docs(cli): clarify that --debug-build-paths requires route group folders in paths: #92618
• turbo-tasks: Drop output_dependent on immutable task completion: #92683

Credits

Huge thanks to @lukesandberg, @timneutkens, and @icyJoseph for helping!

Core Changes

• feat(turbopack): add LocalPathOrProjectPath PostCSS config resolution: #91338
• Fix segment explorer file pill accessibility: #92608
• Perf: Only instrument clientComponentLoadTimes when used: #91385

Misc Changes

• Remove a ton of turbo task functions from Issue trait items: #92623
• feat(turbopack): change DiskFileSystem root to Vc<RcStr> for portable cache: #92603
• Turbopack: remove unused ChunkableModules struct: #92606
• Disable sccache temporarily: #92657

Credits

Huge thanks to @lukesandberg, @sokra, @mischnic, @timneutkens, and @mmastrac for helping!

Core Changes

• Node.js streams: Add forkpoint for CacheComponents: #92444
• Resolve compilerOptions.paths in tsconfigs without compilerOptions.baseUrl: #92277
• Add codemod command to middleware deprecation warning: #92532
• [partial fallbacks]: enable by default: #92627
• refactor: write pages router export files directly to server/pages/: #90018

Misc Changes

• Fix NextFontIssue IssueStage: CodeGen → Resolve: #92588
• test: reduce writeToDisk memory test iterations to fix CI timeout: #92586
• Refactor effects system: dedup/conflict detection, simplified Effect trait: #92300
• fix(ci): improve Docker image cache streaming throughput and arch-awareness: #92617
• Turbopack: extract inline base64 decode helper to shared @turbopack/base64 module: #92549
• docs: add Link transitionTypes version history: #92624
• CI: Download and run self-contained datadog-ci instead of using pnpm dlx or npx: #92546
• turbopack: move CSS module composes validation from code generation to resolving: #92582
• Drop turbo_tasks::function from ValueDebug trait items: #92593
• Turbopack: fix filesystem watcher config not applying follow_symlinks(false): #92631
• Bump swc to 63.1.1: #92604
• chore(turbopack): upgrade qfiler to v0.3.0-alpha.4: #92558
• Turbopack: cut number of client references in half: #92607
• fix(ci): improve Docker image caching and native build skip optimization: #92633

Credits

Huge thanks to @sokra, @timneutkens, @hamidrezahanafi, @mmastrac, @lukesandberg, @aurorascharff, @bgw, @ztanner, @mischnic, @fireairforce, and @bgub for helping!

Core Changes

• Don't swallow strings thrown in Server Components: #92592

Credits

Huge thanks to @eps1lon for helping!

Core Changes

• Add next internal upload-trace: #92191
• Perf: Add fast path to isAbsoluteUrl: #91389
• Perf: Don't require watchpack in production: #91387
• Request logging: Fix generate-params time being included in next.js time: #91386
• Perf: Use charCodeAt in removeTrailingSlash: #91384
• Perf: Cache regex in shouldServeStreamingMetadata: #91388
• fix: scope "Pages Router only" comment to default export in next/error: #92566
• Turbopack Build: Remove dev fouc from production bundle: #80935
• fix(hmr): reconnect WebSocket after sleep/wake: #91416
• Handle target option in React Compiler for Pages + React 18: #91500
• [turbopack] Rust dependency caching via sccache: #91873
• trace: detect rage restarts and deleted .next dirs: #92489

Misc Changes

• turbo-tasks-backend: prevent duplicate task restores with restoring bits: #92389
• docs: update details about unstable_retry() behavior: #91827
• docs: link updateTag from cacheTag reference: #92379
• [test] Stop using deprecated target: "es5" TypeScript compiler option: #92458
• Docs: Instant docs updates: #92515
• Turbopack: Improve unable to resolve next error: #91394
• [test] Ensure incomplete minimum release age isn't propagated to fixture installs: #92568
• test: skip .next and other build artifacts in writeFiles filter: #92578
• Replace wasmer with wasmtime for SWC plugin WASM engine: #91533
• docs: native db drivers with sync queries: #92572
• turbopack: fix incremental build when module factories are restored from persistent cache: #92569
• CI: Another attempt to fix pnpm versions for next-stats-action on canary: #92550
• [turbopack] fix a debug_assert failure: #92581

Credits

Huge thanks to @sokra, @timneutkens, @devjiwonchoi, @aurorascharff, @eps1lon, @lukesandberg, @icyJoseph, @bgw, @mmastrac, and @wbinnssmith for helping!