v15.6.0-canary.41

Misc Changes

• Turbopack: Only benchmark file IO on next dev: #84474
• Turbopack: improve incremental build performance when deployment id changes: #84460

Credits

Huge thanks to @bgw and @sokra for helping!

v15.6.0-canary.40

Core Changes

• 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

Misc Changes

• [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

Credits

Huge thanks to @lukesandberg, @ztanner, @timneutkens, @icyJoseph, @unstubbable, @vercel-release-bot, @bgw, @brian-lou, and @gnoff for helping!

v15.6.0-canary.39

Core Changes

• 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

Misc Changes

• 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

Credits

Huge thanks to @ijjk, @mischnic, @devjiwonchoi, @chloe-yan, @huozhi, @SyMind, @timneutkens, @ztanner, @sireesha-siri, @unstubbable, and @vercel-release-bot for helping!

v15.6.0-canary.38

Core Changes

• Revert "Revert "Revert "Add a --webpack flag and default --turbopack to true (#84216)""": #84389

Misc Changes

• Turbopack: trace module.createRequire: #84335

Credits

Huge thanks to @mischnic and @lukesandberg for helping!

v15.6.0-canary.37

Core Changes

• 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

Example Changes

• examples: Remove AMP example: #84355

Misc Changes

• 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

Credits

Huge thanks to @devjiwonchoi, @icyJoseph, @timneutkens, @lukesandberg, @mischnic, @ztanner, @sokra, and @huozhi for helping!

v15.6.0-canary.36

Core Changes

• [cna] Add reactCompiler option: #82251
• Turbopack: remove canary version check for turbopackPersistentCachingForDev: #84277
• [turbopack] Add support for debug_ids: #84319

Misc Changes

• 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

Credits

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

v15.6.0-canary.35

Core Changes

• 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

Example Changes

• Use Array.from to avoid @ts-ignore when copying i18n.locales: #82148

Misc Changes

• [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

Credits

Huge thanks to @eps1lon, @sokra, @lukesandberg, @Anshuman71, @bgw, and @RobertFent for helping!

v15.6.0-canary.34

Core Changes

• Turbopack: only write merged manifests when they have been changed: #84261

Misc Changes

• [test] Ignore pnpm update notifier: #84328

Credits

Huge thanks to @sokra and @eps1lon for helping!

v15.6.0-canary.33

Core Changes

• 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

Misc Changes

• 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

Credits

Huge thanks to @devjiwonchoi, @sokra, @unstubbable, @lukesandberg, @FelipeChicaiza, @bgw, @kevva, @huozhi, @m1abdullahh, @vercel-release-bot, and @F7b5 for helping!

v15.6.0-canary.32

Core Changes

• 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

Misc Changes

• 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

Credits

Huge thanks to @devjiwonchoi, @sokra, @unstubbable, @lukesandberg, @FelipeChicaiza, @bgw, @kevva, @huozhi, @m1abdullahh, @vercel-release-bot, and @F7b5 for helping!