The kernel. Everything else is a module.
Mother is the bare-metal kernel from which every operational module is instantiated, governed and, when required, terminated. The substrate the other 34 modules run on is compiled by Mother. The rules they operate under are enforced by Mother. The identity they carry is signed by Mother. No module can override it, no module can replicate it, no external system can reach it. It exposes no API and answers no requests. Continuity is part of the design: kernel authority survives any single failure, by protocol.