Bain’s three‑layer model

Bain published a three‑layer reference architecture for enterprise agent platforms—an engagement layer, an orchestration layer, and a governed data layer—arguing orchestration and visibility must be first‑class platform features. The framework surfaces things to productize: standard runtimes and SDKs, trace schemas, policy hooks, and controlled access to enterprise information. The paper is explicitly positioned as a practical blueprint for multi‑brand companies that want a central control plane for routing, policy and observability rather than giving every team raw model access. (bain.com)