Core Changes

• Use ESLint Flat Config: #84800
• fix missing flight-router-state-tree header normalization: #84718
• Write .next/dev/types/**/*.d.ts to default tsconfig: #84747
• Upgrade React from 9724e3e6-20251008 to ead92181-20251010: #84793
• [mcp] capture next config schema errors: #84832

Example Changes

• [docs] fix(with-supabase): Update README env variables: #84745

Misc Changes

• Update test/CNA templates React version to 19.2.0: #84736
• Turbopack: use the same serialization method for lookup as for storing: #84765
• Turbopack: update petgraph: #84757
• [turbopack] Issue 'too many matches' warning for DirAssets also: #84768
• Revert "Fix flakey overlay feedback test": #84819
• [test]: de-flake client-cache.original.test.ts: #84831
• [ci]: set NEXT_TEST_VERSION to release tag for deploy tests: #84840

Credits

Huge thanks to @eps1lon, @devjiwonchoi, @CarloQuick, @sokra, @lukesandberg, @ztanner, and @huozhi for helping!