next 15.4.2-canary.21

v15.4.2-canary.21

on Node.js Yarn

Core Changes

• Fix RSC hash validation for middleware external rewrites: #82176
• @next/codemod: update docs url in README: #82135
• @next/codemod: Add experimental.turbo to turbopack codemod for Next.js configs: #82134
• refactor: lowercase app router header values: #82169
• Strip internals from NextRequest types: #82172

Misc Changes

• docs: update cacheTag.mdx: #82051
• Turbopack: Make the "non-recursive" logic for the fs watcher a runtime flag instead of a build-time one: #82031
• Turbopack: Add a flag to the fs watch fuzzer to print missing but expected invalidations: #82131
• docs: fix typo in docs: #82186
• docs: Add more links to app docs root: #82126
• docs: App Router's React version: #82180

Credits

Huge thanks to @gaojude, @wbinnssmith, @m1abdullahh, @bgw, @Sayakie, @icyJoseph, @lubieowoce, and @eps1lon for helping!