Core Changes

• Ensure _middleware is consistent in adapter for name/id:#89559
• Ensure Errors with deep causal chains respect inspect depth:#89594
• refactor: extract route discovery into unifieddiscoverRoutes() API:#88971
• Ensure static metadata are static outputs for adapters:#89574
• Resolve local variable references in error code SWC plugin:#89596
• Turbopack: Add --experimental-server-fast-refresh CLI flag:#89274
• Fix deployment id header when proxying:#89593

Misc Changes

• Turbopack: add turbo-persistence benchmark:#89446
• Fix spelling in robots.mdx documentation:#89565
• Proper e2e test of function determinism - adapter:#89522
• [test] consolidate the browser log test:#89601
• Fix flaky turbo cache pull with retries and graceful fallback:#89575
• Turbopack: Pass globals to node.js workers as well:#89261
• Upgrade rustc to 2026-02-05:#89591

Credits

Huge thanks to@ijjk,@sokra,@Thomas465xd,@mischnic,@eps1lon,@huozhi,@bgub,@unstubbable,@mmastrac, and@wbinnssmith for helping!

Contributors

Core Changes

• Don't insert build id comment in HTML:#89478
• Clarify type checking error message:#89525
• Require explicitcacheLife on outer"use cache" when nesting short-lived caches:#89481
• [Instant] Instant validation in Dev:#89077
• Upgrade React from3e00319b-20260203 to95ffd6cd-20260205:#89550
• Turbpopack: fix is_persistent_caching_enabled:#89533
• Fix a small doc typo:#89553

Misc Changes

• Proper e2e test of function determinism:#88908
• docs: fix ISR guide link to res.revalidate:#89342

Credits

Huge thanks to@mischnic,@unstubbable,@lubieowoce,@pavan-sh, and@lukesandberg for helping!

Contributors

Core Changes

• Ensure module contexts are always included in adapter traces:#89508

Credits

Huge thanks to@ijjk for helping!

Contributors

Core Changes

• Addexperimental.reportSystemEnvInlining for Turbopack:#89304
• fix: use signal-based exit codes to prevent inspector blocking exit:#89351
• Add Instant Navigation Testing API:#89465
• Support MPA navigations ininstant():#89469
• Handle Pages data route skew with deployment id header, take 2:#89325
• Include owner stack for forwarded errors if available:#89493
• [CC] Rename "unstable_prefetch" to "unstable_instant":#89448

Example Changes

• chore(examples): removewith-tigris example:#81843

Misc Changes

• Update Rspack production test manifest:#89423
• Update Rspack development test manifest:#89424
• Turbopack: improve suggestions for experimental.reportSystemEnvInlining:#89486
• docs: Fix syntax in proxy example code:#89395
• Add experimental flag to expose testing API in production builds:#89499

Credits

Huge thanks to@vercel-release-bot,@mischnic,@timneutkens,@acdlite,@JamBalaya56562,@ericrav,@huozhi, and@lubieowoce for helping!

Contributors

• fix unlock in publish-native

This is a re-release ofv15.5.11 applying the turbopack changes.

Example Changes

• chore(examples): removewith-recoil exmaple:#81836

Misc Changes

• Don't upload build cache for deployment tests:#89432
• Fix indentation of types of tests in docs:#89409
• Add separate E2E deploy env for turbopack tests:#89458
• Turbopack: Symbol.for and keyFor are sideeffect-free:#89454

Credits

Huge thanks to@mischnic,@JamBalaya56562,@wheresrhys, and@ijjk for helping!

Contributors

Core Changes

• Replace flight navigation build id field with header:#88855
• Upgrade React fromda641178-20260129 toed4bd540-20260202:#89401
• Upgrade React fromed4bd540-20260202 tob1533b03-20260203:#89444
• Upgrade React fromb1533b03-20260203 to3e00319b-20260203:#89449
• Rename CACHE_ONE_YEAR for clarity and fix usage:#89450
• [Codemod] Fix agents-md on Windows:#89319
• Experimental deferred entries handling:#88347

Misc Changes

• Snippet multi package syntax:#89381
• TURBOPACK: support chunk_loading_global method:#88790

Credits

Huge thanks to@icyJoseph,@mischnic,@ijjk,@fireairforce, and@gaojude for helping!

Contributors

Core Changes

• Turbopack: FreeVarReference::ReportUsage:#89302
• Make Server Function logging opt-in vialogging.serverFunctions:#89321
• Restore default-enabled Server Function logging:#89407
• Re-add build-complete traces for webpack:#89402
• Skip Server Function logging for'use cache' functions:#89408

Misc Changes

• Turbopack: Move PrettyPrintError to turbo_tasks and add tests:#89280
• Update Rspack production test manifest:#89372
• Update Rspack development test manifest:#89371
• docs: replace 'can not' with 'cannot':#89354
• docs: Fix custom server code snippets:#89400

Credits

Huge thanks to@sokra,@mischnic,@unstubbable,@vercel-release-bot,@pavan-sh,@amannn, and@ijjk for helping!

Contributors

Core Changes

• Turbopack: Rename crates/napi to crates/next-napi-bindings and update crate name:#89314
• feat: detect @typescript/native-preview as alternative TypeScript compiler:#89149
• Revert "Fix/zlib mem node":#89322

Credits

Huge thanks to@bgw and@Suhaib3100 for helping!

Contributors

Misc Changes

• Apply server actions transform tonode_modules in route handlers:#89316
• [test] Deflakebrowser-log-forwarding verbose level test suite:#89324

Credits

Huge thanks to@unstubbable for helping!

Contributors