This module establishes the core shift from building demo agents to engineering governed systems. You will learn to identify architectural fault lines and define a system using the three criteria: observable end-to-end, explicitly bounded, and fail-safe.

We introduce the five-plane Agentic Stack as your primary architectural map and the contract spine that binds it. You’ll learn to replace hidden assumptions with explicit, versioned contracts for policy, data, state, service, and feedback, turning interfaces into verifiable control points.