Core Changes

• Build the inline Flight script from React's strings instead of re-encoding them: #100142
• Fix dist dir lockfile on filesystems with no or limited lockfile implementations (e.g. NFS): #100684

Misc Changes

• perf(turbopack): look up chunk group indices through a keyed cell: #99050
• Turbopack: track availability by chunk group: #98685
• refactor(turbopack): chunk chunk groups by key: #99750
• Turbopack: consume graph-derived chunk groups: #98734
• turbo-tasks-backend: stripe SnapshotCoordinator's operation count and poll for the drain: #100280
• turbo-tasks-backend: parallelize decoding of large batch lookups: #100453
• turbo-persistence: don't shrink the shard count before the first bottom merge: #100424

Credits

Huge thanks to @sokra, @lukesandberg, @gaearon, and @bgw for helping!

Core Changes

• Turbopack: bump trace format header to TRACEv1: #99781
• Pass staged fallback params directly to adapter renders: #100456
• Fix navigation from global-not-found to app routes: #100592
• End the cache-signal read when encryptActionBoundArgs hits the RDC: #100622
• Ignore flaky turbo-tasks-fs watcher tests in CI: #100627

Misc Changes

• test: enable build-error suites in deploy mode: #100482
• test: enable deploy-excluded suites verified against deployments: #100484
• Turbopack: fix trace crates after concurrent trace format changes: #100656
• [cd] Document that Turbopack team can also approve releases: #100650
• Turbopack: delta-encode trace timestamps: #99809
• docs: add turbo_tasks development guidance for agents: #100581
• Fix pnpm new-test unit type generating no test file: #100641
• [test] Reproduce two cache-sharing bugs: #100510
• [test] Cover cache sharing after handler failures: #100519

Credits

Huge thanks to @jamiboym, @sokra, @eps1lon, @mischnic, @unstubbable, @kassens, @huozhi, and @digasic for helping!

Misc Changes

• Revert "More parity for webpack loader build dependencies (#99549)": #100634
• Cache bundle analysis per output file: #100475

Credits

Huge thanks to @mischnic and @wbinnssmith for helping!

Core Changes

• v16.4.2
• [lts-active] Fix extensionless Google font URLs in both bundlers (#100277)
• [lts-active] Don't load the app-page runtime in proxy.ts (#100423)
• [lts-active] Revert "Turbopack: loader change invalidation (#95732)" (#100438)
• [lts-active][cd] Gate release bot credentials behind GitHub environments (#100123)
• [lts-active] test: Pin react-virtualized (#100545)
• [lts-active][cd] Move release un-draft to a follow-up job in bot-autonomous (#100572)
• [lts-active] Keep OpenTelemetry request traces together (#100349, #100294, #100324, #100350, #100552, #100583) (#100542)
• [lts-active] Avoid loading standalone React in server bootstrap (#100610)

Credits

Huge thanks to @mischnic, @lukesandberg, @acdlite, @eps1lon, and @sokra for helping!

Core Changes

• Cap bot user-agent matching at 1KB: #100604
• Pass lazy response lifecycle capabilities into App rendering: #100395
• Upgrade testmode interceptors to 0.45.9: #100585
• Defer React loading until fetch dedupe construction: #100401
• Avoid loading standalone React by separating render validation: #100467

Misc Changes

• fix(turbopack): evaluate pure constructor callees: #100588
• Add webpack utils: #99826
• Stop requiring build-all when bootstrapping a fresh clone or worktree: #100600
• Fix webpack build dependency cell creation order: #100597
• More parity for webpack loader build dependencies: #99549
• Extend lazy server imports to route handlers and Pages: #99541
• test: enable log-file and worker-react-refresh in deploy mode: #100480
• ci: only declare a Vercel deploy target for webpack runs without a custom script: #100479
• Turbopack: Honor PURE annotations for callback arguments: #100577
• test: add non-adapter deploy snapshots to otel-middleware-trace: #100583
• Update Rspack development test manifest: #100557
• Update Rspack production test manifest: #100558
• ci: Fix ast-grep CI step: #100569

Credits

Huge thanks to @mischnic, @jimmyhmiller, @eps1lon, @kassens, @jamiboym, and @sokra for helping!

Core Changes

• Upgrade React from a6792708-20261019 to ab0d927f-20261020: #100527
• Preserve deferred middleware instrumentation spans when the adapter throws: #100552
• Fix cache revalidation queued during streaming: #100448
• Remove unnecessary as any casts: #100418
• Update font data: #100490
• Turbopack: preserve chunk load promise identity: #100421
• Emit instrumentation lifecycle spans in the request that registered it: #100350
• docs: note that instrumentation-time spans don't join request traces: #100324
• Keep middleware and render in one OpenTelemetry trace as siblings: #100294
• Start the request span before route module preparation: #100349
• Fix prerender manifest update race in dev: #100521
• Report process memory footprint (RSS) in TurboMalloc and trace samples: #99527
• Preserve cached values for the final runtime prerender: #100447
• Calling server actions in GSP fails __next_require__ is not a function: #99912
• fix: persist cacheControl for Pages Router ISR entries in FileSystemC…: #100495

Misc Changes

• [cd] Move release un-draft to a follow-up job: #100571
• Fix analyzer cell creation order: #100562
• [ci] Run flakiness detection under concurrent load: #100525
• [test] Avoid port collisions in concurrent OpenTelemetry tests: #100538
• [test] Avoid port collisions in concurrent keep-alive tests: #100537
• turbopack: use reverse postorder priority in compute_binding_usage_info: #100440
• turbo-tasks: unemit taken collectibles in a single backend operation: #100437
• Bump turbo to 2.11.10: #100549
• Turbopack: lazily compile lazy import.meta.glob matches: #100523
• turbo-tasks: batch invalidation via Invalidator::invalidate_all: #100485
• turbo-tasks: make scope_unbounded worker churn test deterministic: #100515
• Turbopack: test import.meta.glob code splitting with an execution test: #100532
• Turbopack: fix chunking for lazy import.meta.glob matches: #100522
• [test] Stabilize the cache revalidation navigation test: #100514
• Bump to swc v82.2.0: #100508
• turbo-tasks-backend: skip dirtying removed cell dependents: #100460
• docs: use the exported unstable_doesMiddlewareMatch name in proxy unit testing: #100499
• turbo-tasks-backend: restore invalidated tasks with batched optional reads: #100465
• Durable use cache: don't crash on Node workers: #100505

Credits

Huge thanks to @eps1lon, @zydo, @unstubbable, @sokra, @jamiboym, @sokra, @lubieowoce, @mischnic, @icyJoseph, @koreahghg and @lukesandberg for helping!

Core Changes

• Defer app router HMR refresh until the router is initialized: #100113

Misc Changes

• test: extend webpack timeout for dynamic-params-retained-cache: #100382

Credits

Huge thanks to @sokra for helping!

Core Changes

• Upgrade React from ba39b32a-20261019 to a6792708-20261019: #100459
• Pass request headers explicitly into App request stores: #100333
• Remove request from App page prerender entry point: #100331
• Use render lifecycle callback for fetch metrics cleanup: #100323
• Upgrade React from 99c106c4-20261014 to ba39b32a-20261019: #100403
• Pass interception capability into App rendering: #100409

Misc Changes

• [cd] Gate release bot credentials behind GitHub environments: #100121
• test: retry vercel deploy on transient pre-deployment network errors: #100070
• turbo-tasks: batch schedule invalidated tasks and cell dependents: #100446
• turbopack: use reverse postorder priority in compute_merged_modules: #100430
• turbopack: use reverse postorder priority in collect_graph: #100429
• turbopack: use reverse postorder priority in compute_chunk_group_info: #100428
• Turbopack: propagate late partial namespace provenance to passthrough targets: #100444
• turbopack: store unused reference edges in a keyed Vc: #100441
• AGENTS.md: prefer e2e/execution tests over implementation-mapped unit tests: #100451
• docs: document useRouter push/replace void return and useTransition migration: #100420
• docs: type proxy examples with NextRequest and fix cookie check: #100417
• Turbopack: keep env and preview props invalidations key-granular on warm start: #100425
• test: unflake prefetch-fallback-static in deploy: #99366
• Fix Activity testing guide claim about label and placeholder locators: #100445
• [ci] Upload adapter test results via GitHub Actions OIDC: #100400
• turbo-persistence: read compaction inputs with pread instead of mmap: #100336
• test: explain why deploy build-log markers are missing: #100069
• test: bound deploy build-log polling with backoff and per-call timeouts: #100068
• turbo-tasks-backend: remove racy ungated collectibles_outdated_dependency test: #100377

Credits

Huge thanks to @eps1lon, @sokra, @Aryan9891, @deveshasawa28, @lukesandberg, @lubieowoce, @icyJoseph, and @kassens for helping!

Core Changes

• Show compiling status alongside DevTools issues: #100178
• Pass staged fallback params into App rendering: #100408
• Capture initial HMR version in dev render context: #100407

Credits

Huge thanks to @aurorascharff and @kassens for helping!

Core Changes

• Revert "Turbopack: loader change invalidation (#95732)": #100414
• Add : #99871
• remove Static render stage: #100388
• Don't load the app-page runtime in proxy.ts: #100384
• Format all READMEs with Prettier: #100310
• Fix Pages Router HMR crash when the ISR manifest arrives before the router: #100095
• Use os.availableParallelism() instead of os.cpus().length: #100258

Misc Changes

• test: fix flakiness in segment-cache-stale-time: #100404
• docs: Clarify when useSearchParams boundaries render on the server with Cache Components: #100276
• Clarify which pathname usePathname reads under rewrites: #100393
• test: avoid useTempDir cleanup hang on Windows (fs-extra fixWinEPERM): #100088
• test: run custom install commands async with a hard timeout: #100057
• Clarify lazy SST opening in turbo-persistence docs: #100311
• Bump to swc v82: #100270
• test: disable the reads fallback params after a client navigation deployment test: #100371
• test: Pin react-virtualized: #100383
• turbo-persistence: read SST metadata blocks once with pread: #100288
• turbopack: intern merge bitmaps in compute_merged_modules: #100236
• Turbopack: don't scope hoist modules using direct eval: #100308

Credits

Huge thanks to @mischnic, @acdlite, @lubieowoce, @icyJoseph, @tobiaslins, @sokra, and @lukesandberg for helping!