Internal 'business-action framework' built on top of Rails that let developers encapsulate commands/operations with validations, preconditions, policies and business logic as first-class objects. Business actions embedded controllers and were mounted onto routes. Mounting them at application boot caused controllers to be created before Spring forked, which then survived all subsequent reloads and accumulated method-definition work — the root cause of the slowdown in the talk. Later rewritten and open-sourced as 'granite'.