Is Agentic AI just Old Software Engineering with New Names?

Orchestrators, planners, tool use, agent memory, guardrails. Experienced engineers look at the agentic AI vocabulary and ask a fair question. Haven't we built all of this before? The honest answer is yes and no. This post is about the no.

Most agentic AI terminology maps cleanly onto things distributed-systems engineers already know. Orchestration is workflow management, multi-agent systems are message passing, tool use is an API call behind a dispatcher. But the component at the centre is a probabilistic machine programmed in English. That one difference changes testing, monitoring, security, and cost more than the familiar parts suggest.