Core Changes

• Don't import typescript at runtime: #88321
• fix: use RDC for server action requests: #88129
• Warn when overriding Cache-Control header on /_next/ routes: #88353
• [prebuilt-skew-protection] feat: adding in automatic deploymentId: #88012
• Revert "[prebuilt-skew-protection] feat: adding in automatic deploymentId": #88449
• Turbopack: Update reqwest, remove experimental system TLS feature: #88290

Misc Changes

• Update AGENTS.md with PR template and test generation requirements: #88417
• Add .cursor/worktrees.json configuration: #88415
• docs: add guidance for code block highlight line numbers to AGENTS.md: #88430
• [turbopack] Compute transitive side effects and use them to trim imports: #86675
• fix(turbo-tasks-backend): use correct TaskDataCategory for is_immutable check: #88331
• perf(turbo-tasks-backend): use DefaultStorage for AggregationNumber to save memory: #88336
• [Turbopack] Move DirList to its own module: #88256
• docs: add rebuild guidance and ICE troubleshooting to AGENTS.md: #88337
• Type-check run-tests.js and remove unused related flag: #88433
• [test] Remove obsolete reference to NEXT_TEST_SKIP_RETRY_MANIFEST: #88434
• Revert "[Turbopack] Move DirList to its own module": #88441
• [scripts] Avoid conflicting type for pack-next --compress: #88439
• Update Rspack production test manifest: #88403
• Update Rspack development test manifest: #88404

Credits

Huge thanks to @mischnic, @timneutkens, @lukesandberg, @ztanner, @andrewimm, @unstubbable, @eps1lon, @brookemosby, @vercel-release-bot, and @bgw for helping!