The processes the core needs, for a host to put in its own tree.

children = [
  ExMontyTbp.Core.Supervisor,
  MyApp.Endpoint
]

Two of them, and both are about finding a module by name:

• Monty.Runtime.Registry — every sensor and learning module registers here, so the step coordinator can address a module across restarts;
• ExMontyTbp.Core.ModelSupervisor — one child per running model, holding its module servers and step coordinator. A model is stopped by terminating its supervisor, so its children cannot outlive the run.

A host that names these differently passes the supervisor name to Monty.Runtime.Model.stop/1; nothing else in the core knows a host's names.