Next.js v16.0.1 — Release Notes & Engineering Impact

### Core Changes - fix(static-paths): add depth tracking to parallel route param resolution: #85319 - Fix types of @next/mdx: #82238 - Ensure getServerInsertedHTML skips rendering correctly: #85394 - Fix duplicate .next/types `include` on Windows: #85400 - Exclude `next-js` condition from middleware, proxy, and instrumentation: #85321 - remove unstable_forceStale prefetch option & restore `prefetch={true}` functionality: #85411 - Upgrade React from `2bcbf254-20251020` to `6160773f-20251023`: #85277 - fix(next/image): swap dependencies: #85419 - Handle `Origin: null` headers: #85402 - Generalize Segment Cache fallback implementation: #84652 - fix: ensure req.query is writable: #81573 - fix: Proxy not picked up on Windows: #85443 - [test] Ensure we can toggle the DevTools menu while status indicators are active: #85456 - Fix crash when suspending in Components using `useActionQueue`: #85459 ### Misc Changes - docs: create-next-app react-compiler and new prompts: #85213 - docs: cache components - introduction: #85196 - docs: use cache feedback: #85169 - docs: stabilize apis in docs: #85219 - docs: revalidateTag immediate expiration in Route Handlers: #85223 - Docs/use cache feedback 2: #85222 - docs: added `use cache: remote` docs: #85145 - docs: proxy runtime defaults to nodejs: #85204 - chore: cache components feedback: #85241 - docs: add a note that cache components is opt-in near the top: #85245 - Docs/v16 feedback: #85259 - Update command to install babel-plugin-react-compiler as a devDependency: #85235 - docs: typegen next-env.d.ts feedback: #85273 - docs: link to MCP guide from upgrade: #85308 - docs: regexp removed from middleware config: #85343 - docs: simplify MCP guide to focus on next-devtools-mcp: #85353 - docs: fix proxy matcher overflow: #85337 - docs: point out diff in serialization types for arguments and return values: #85338 - [test] Update snapshots: #85407 - docs: Fix typo in SEO section of loading.mdx: #85301 - Fix typo in Fast Refresh documentation: #85352 - Fix grammatical errors in updating data documentation: #85067 - [test] Skip devlow benchmarks on PRs: #85408 - [test] Unflake typed-env suite: #85410 - Update rust toolchain to 2025-10-27: #85409 - [test] Speed up prefetching suite: #85417 - docs: remove inaccuracies from use cache: private: #85425 - [test] Exclude Next.js internal stack frames from cache-component-error CLI output assertions: #85421 - [test] Exclude likely Next.js internal Components from component stacks in Redbox assertions: #85420 - Turbopack: correctly trace files with npm: #85323 ### Credits Huge thanks to @icyJoseph, @wyattjoh, @devjiwonchoi, @arnabsen, @remcohaszing, @denesbeck, @gaojude, @mhart, @eps1lon, @jesuistuan, @codr, @InfiniteCodeMonkeys, @gnoff, @ztanner, @wbinnssmith, @styfle, @acdlite, @ale-grosselle, and @mischnic for helping!