Agentic AI refers to artificial intelligence systems designed to operate autonomously. These agents can perceive their environment, reason about it, plan actions, and execute them to achieve defined goals. In the context of Claude prompting, an agentic system means Claude itself generates, executes, and refines prompts without constant human intervention. Loop Engineering is a specific methodology within agentic AI. It involves creating iterative cycles where an AI agent continuously generates a prompt, executes it, evaluates the output, and then refines the original prompt or generates a new one based on the evaluation. This creates a self-improving, adaptive system.