What makes something an AI agent instead of just an LLM call?
A single LLM call takes text in and returns text out — one shot, no state. An AI agent wraps an LLM in a loop with tools, memory, and a way to decide its own next step, so it can plan, call APIs, check results, and act again based on what it learned. The loop and the tools are the agent; the LLM is just the reasoning engine inside it.
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20 AI Concepts Every Developer Should Actually UnderstandA layered glossary of the 20 AI concepts developers keep running into — grouped by dependency, not alphabetized, so each term builds on the one before it.
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