Building a Simple AI Agent
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People overcomplicate AI agents. They’re actually stupid simple. Here’s the entire
thing in about a minute. An AI agent is just three parts: A brain — the model.
A plan — the reasoning layer. And tools — the stuff it can actually use.
You give it input → it thinks → it acts. That’s it. Let’s build one
in n8n fast. Drop an AI Agent node. It errors — no brain yet.
Add a Chat Model, connect your API key, done. Say “hello.” Works.
Say “My name is Matt, help me send an email.” Then ask “What’s
my name?” It blanks — because there’s no memory. Add Window Buffer Memory.
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