Background per-core CPU monitoring for Ruby/Rails applications. Reads /proc/stat on Linux (Heroku) or top on macOS. Writes a rotating 1 MB JSON-lines log per dyno. On single dynos the file backend is used; on multi-dyno Heroku deployments the Redis backend aggregates all dynos into a single CpuInspectCore.status view. Ships with a Rails Railtie for zero-config boot and a CLI executable for bash usage.