1.0.0 stable First stable release of the Drupal.org-native LSCache integration. Cut after rc1 soaked cleanly across TubeSpanner Portal and several live production sites for ten days with no tag-invalidation regressions, header correctness issues, or open queue reports. Same code as rc1 plus a cosmetic info.yml description polish. 1.0.0 signals API stability and opens the project to Drupal Security Advisory coverage. 1.0.x is now bug-fix and security-patch only; new feature work moves to 1.1.x.