Core Changes

• Allow attaching a debugger when next dev is already running: #86083
• Introduce next analyze: a built-in bundle analyzer for Turbopack: #85915
• Turbopack: add experimental.turbopackClient/ServerSideNestedAsyncChunking: #85827

Misc Changes

• [turbopack] Remove Clone from Effect: #86110
• Turbopack: mark more modules as side effect free: #86136
• [test] Use next-data-api-endpoint for Middleware HTTP method tests: #86157
• fix broken extend implementation on DynamicStorage: #86204
• Turbopack: avoid creating another async chunk loader where there is already one available: #85817
• Fix typo on 03-layouts-and-pages.mdx: #86186
• Update 14-metadata-and-og-images.mdx: #86198

Credits

Huge thanks to @lukesandberg, @eps1lon, @sokra, @unstubbable, @hamidreza-nateghi, @jokokoloko, and @wbinnssmith for helping!