Agent reasoning is doubling every seven months. Agents can now solve tasks that take hours to complete. Context is the bottleneck. Teams need infrastructure that lets agents find the right context, retrieve it fast, and improve over time. Without it, you end up with bloated prompts, tool sprawl, unsafe text-to-SQL, and brittle workflows. Context engines are the solution: a stateful layer that unifies documents, memory, and business data. This talk covers foundational concepts for building a context strategy, and a context engine.