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!