confeature

https://github.com/confeature/sdks

Confeature is an open-source feature-flag service that mirrors the ConfigCat API surface 1:1 (Constitution Principle II). The `confeature` gem is the Ruby SDK: same public class names, same option keywords, same polling modes, same flag-override semantics as `configcat`. Migrate by renaming the gem and swapping the SDK key.