Clients operate a Client Domain Responsibility System and a Client Domain Application. They do not directly operate Core OS kernel internals or Foundry construction runtimes.
Core E2C Responsibility OS + selected LBAI application responsibility chain families + client domain pack + client sources / state / capabilities / authorization + client-specific operational runtime. Client AI proposes; this system governs consequential state.
The UI / API / workflow / report / approval surface for daily work. Conceptual / design-partner scoped until generally available — not public self-serve SaaS today.