Core Changes

• Ensure _middleware is consistent in adapter for name/id: #89559
• Ensure Errors with deep causal chains respect inspect depth: #89594
• refactor: extract route discovery into unified discoverRoutes() API: #88971
• Ensure static metadata are static outputs for adapters: #89574
• Resolve local variable references in error code SWC plugin: #89596
• Turbopack: Add --experimental-server-fast-refresh CLI flag: #89274
• Fix deployment id header when proxying: #89593

Misc Changes

• Turbopack: add turbo-persistence benchmark: #89446
• Fix spelling in robots.mdx documentation: #89565
• Proper e2e test of function determinism - adapter: #89522
• [test] consolidate the browser log test: #89601
• Fix flaky turbo cache pull with retries and graceful fallback: #89575
• Turbopack: Pass globals to node.js workers as well: #89261
• Upgrade rustc to 2026-02-05: #89591

Credits

Huge thanks to @ijjk, @sokra, @Thomas465xd, @mischnic, @eps1lon, @huozhi, @bgub, @unstubbable, @mmastrac, and @wbinnssmith for helping!