Core Changes

• Fix params leaking into instant navigation shell in dev: #90455
• Limit build workers to pages+1: #90475

Misc Changes

• Update Rspack production test manifest: #90412
• Update Rspack development test manifest: #90413
• Add @next/playwright package with instant() testing helper: #90470
• [turbopack] Reduce memory usage during compaction: #90229
• [sync-react] Allow syncing from a React commit: #90283
• Turbopack: Add line numbers to debug info in release-with-assertions profile: #90474
• Turbopack: emit env_diff span attribute for update: #90466
• test: unflake lru-disk-eviction on Windows: #90465

Credits

Huge thanks to @vercel-release-bot, @acdlite, @lukesandberg, @eps1lon, @bgw, @mischnic, and @andrewimm for helping!