This PR is a preview of the release that release-plan has prepared. To release you should just merge this PR 👍

Release (2026-01-06)

• ember-cli 6.10.0-beta.1 (minor)
• @ember-tooling/classic-build-addon-blueprint 6.10.0-beta.1 (minor)
• @ember-tooling/classic-build-app-blueprint 6.10.0-beta.1 (minor)

🚀 Enhancement

• ember-cli, @ember-tooling/classic-build-addon-blueprint, @ember-tooling/classic-build-app-blueprint
  • #10917 Prepare 6.10-beta (@mansona)
  • #10887 Update chalk dependency to latest (@bertdeblock)
  • #10873 Prepare 6.10 Alpha (@mansona)
• ember-cli
  • #10906 Even more dependency updates (@bertdeblock)
  • #10892 More dependency updates (@bertdeblock)
  • #10890 Update various dependencies (@bertdeblock)
  • #10870 Upgrade broccoli (@kategengler)

🐛 Bug Fix

• ember-cli
  • #10888 Upgrade broccoli (@kategengler)
  • #10886 Update required Node version to v20.19.0 (@bertdeblock)
  • #10860 [BUGFIX release]: Enter the WatchDetector branch of the build command when EMBROIDER_PREBUILD is present (@NullVoxPopuli)
• @ember-tooling/classic-build-app-blueprint, ember-cli
  • #10876 bump minimum node version to 20.19 (@mansona)

📝 Documentation

• ember-cli
  • #10874 Update RELEASE.md (@mansona)

🏠 Internal

• ember-cli, @ember-tooling/classic-build-addon-blueprint
  • #10891 Update prettier + setup (@bertdeblock)
• ember-cli
  • #10878 stop using internal package cache for smoke-test-slow (@mansona)
  • #10863 Missed a script -- fix updating output repos (@kategengler)
  • #10862 Fix typo in output repo workflow (@kategengler)
  • #10861 Fix output repo generation with new tag format (@kategengler)

Committers: 4

• Bert De Block (@bertdeblock)
• Chris Manson (@mansona)
• Katie Gengler (@kategengler)
• @NullVoxPopuli