Core Changes

• add GPTBot to matcher for known bots: #89188
• Ensure .md licenses are included in vendored packages: #89201
• Switch development log item format as JSON: #89168
• IsolatedDevBuild flag removal: #89167
• fix: coerce HEAD to GET for internal images: #84180
• Upgrade React from 10680271-20260126 to 230772f9-20260128: #89250
• Upgrade tar used to extract SWC binary : #89158
• Sort prerender manifest routes: #89246
• Track vary params for segments without server-side param access: #88998
• Optimistic routing: client-side route prediction: #88965
• Keep pages/404.js to be able to dynamically render it anyway: #89263
• fix: fully static pages should emit & serve static rsc payloads: #89202

Misc Changes

• Turbopack: change AsyncModulesInfo to use keyed reads: #89216
• Turbopack: selective reads of defined env vars in module analysis: #88759
• Turbopack: add support for turbopackOptional: true: #89227
• Turbopack: fix tracking modifications for transient and data: #89228
• [ci] Clear Jest transform cache: #89247
• Turbopack: Make the globals we pass to workers configurable: #88773
• Accept deploy script and log script as inputs: #89253
• [turbopack] mark persistent_task_type as inline: #89185
• [test] Add test suite name for Tests failures table: #89258

Credits

Huge thanks to @davidgolden, @sokra, @eps1lon, @huozhi, @icyJoseph, @mischnic, @mmastrac, @LucianBuzzo, @ijjk, @lukesandberg, @devjiwonchoi, @acdlite, and @ztanner for helping!