v12.1.2

Core Changes

• RSC: handle commonjs in flight loader: #35563
• Update rsc refresh typing and doc example: #35543
• Revert "Revert "Make concurrent features independent from the global runtime option" #35405": #35490
• Update terminal tree view for switchable runtime: #35394
• Prevent spaces between expressions from being removed: #35613
• Fix: disable script worker in edge and fix rsc loader and runtime: #35604
• enhance: detect ESM by ast type: #35627
• Clean up legacy react 18 tests: #35615
• Fix server component render condition: #35663
• Rename createRSCHook to createFlightHook: #35665
• Ensure eslint plugins dont conflict: #35667

Documentation Changes

• docs: update styling support for streaming: #35375
• Fix typo in rewrites docs: #35639
• Update middleware examples list: #35622

Misc Changes

• Fix create-next-app failing without yarn installed: #35608
• Fix hydration issue in the switchable runtime tests: #35616

Credits

Huge thanks to @huozhi, @shuding, @Brooooooklyn, @tianenpang, @lfades, and @timneutkens for helping!