## Kirkstone End of Life Kirkstone (Yocto 4.0 LTS) has reached EOL as of April 2026. Last release: `kirkstone-2026.15.0`. ## Deprecation Actions Per the operations plan: - [x] Stop automatic recipe updates for kirkstone-next (auto-recipe-update runs on ref_name-next, kirkstone removed from triggers) - [x] Remove kirkstone-next from `auto-backport.yml` targets - [x] Remove kirkstone/kirkstone-next from `build-test-all-branches.yml` - [x] Remove kirkstone-next from `-next staging branches` ruleset - [x] Delete `kirkstone-next` specific ruleset - [x] Remove kirkstone from BitBake version mapping (PR #15567) - [x] Update main README supported branches table (PR #15564) - [ ] Add deprecation notice to kirkstone branch README ## Archive (October 2026 — EOL + 6 months) - [ ] Create final release tag if any security fixes were applied - [ ] Archive branches (read-only) - [ ] Remove from all CI workflows - [ ] Update documentation
Kirkstone End of Life
Kirkstone (Yocto 4.0 LTS) has reached EOL as of April 2026. Last release:
kirkstone-2026.15.0.Deprecation Actions
Per the operations plan:
auto-backport.ymltargetsbuild-test-all-branches.yml-next staging branchesrulesetkirkstone-nextspecific rulesetArchive (October 2026 — EOL + 6 months)