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v16.0.0

[!TIP]
Check out our Next v16 Blog Post to learn more about this release.

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

... (truncated)

• 950609f v16.0.0
• fcc3157 v16.0.0-canary.19
• c0b086c v16.0.0-canary.18
• f770793 logger: skip logging full element (#85194)
• 074262b Only allow node runtime in proxy (#85139)
• 47ceda3 [cache components] persist cache bypass UI until it's disabled (#85190)
• b66c1d6 Remove layout-router sticky/fixed debug warning (#85193)
• 96754b6 Tweaks to blocking route error message (#85191)
• 48bb490 docs: upgrade from 15 to 16 (#85176)
• 9b34b65 [upgrade] Version gate adding --turbopack flag (#85180)
• Additional commits viewable in compare view

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