CacheStatusReport
Corex\Cache\Status\CacheStatusReport · class · Core layer
Every caching layer on this site, from real checks (spec 078, FR-016/017/021, SC-005). Each layer is probed rather than assumed. That sounds obvious and is the requirement most easily failed: “Redis is installed” is a fact about the server, and the fact that matters is whether WordPress is using it. A status screen that conflates the two tells an operator their site is faster than it is, and there is no error anywhere to correct the impression.