# Hystrix Plugin Store Cutover The Hystrix runtime plugin and Spring Boot starter are no longer built or shipped by the main ShenYu repository. Existing deployments that still need Hystrix compatibility should add the external plugin-store starter: ```xml org.apache.shenyu shenyu-spring-boot-starter-plugin-hystrix 2.7.1-SNAPSHOT ``` Hystrix is a deprecated legacy compatibility plugin. New deployments should use the Resilience4j plugin. The main repository keeps `PluginEnum.HYSTRIX`, `HystrixHandle`, `HystrixIsolationModeEnum`, and related default constants as a stable compatibility contract for the external plugin and existing admin data during the supported cutover window. The main repository no longer publishes the Hystrix runtime artifact or includes Hystrix dependencies in the default bootstrap distribution. Rollback during the cutover window is a dependency-only change: remove the external starter and return to a ShenYu build that still shipped the in-tree Hystrix starter. Existing selector and rule data keep the same plugin name and rule-handle schema.