Core Changes

• Upgrade React from b4455a6e-20251027 to 4f931700-20251029: #85518
• [turbopack] Move generation of cacheLife types out of the webpack plugin and into the dev bundler directly: #85539
• Ensure user-space stack frame for 'use cache' in page/layout component: #85519
• Update parallel routes in build-complete: #85546

Misc Changes

• [docs] Fix a typo: #85492
• [test] Regenerate tsconfig.json files: #85515
• [Turbopack] clean up completion.rs a bit: #84863
• [test] Remove maxRetries and hardError parameters: #85536
• Turbopack: remove the .into() alias to .cell(): #85516
• [test] Consolidate identical snapshots across different bundlers: #85532
• [turbopack] Change where cells are created in resolve_raw to make cell allocation order deterministic.: #85525
• Turbopack: Make tasks deterministic: #85524
• [test] Separate act and assertions: #85508
• [test] assert* -> waitFor* when the util is not instant: #85450
• Turbopack: move whole_app_module_graphs to top level: #84897
• [test] Bail on sending requests to Next.js instance if it's no longer available: #85557
• [test] Deflake tests comparing two random numbers: #85571
• [test] Disallow custom RegExp-like implementations in check: #85537
• [test] Deflake prerender suite: #85563
• Turbopack: chore: Remove some dead MagicAny serialization code from turbo_tasks::value: #85577

Credits

Huge thanks to @swarnava, @eps1lon, @lukesandberg, @sokra, @unstubbable, @bgw, and @ijjk for helping!