You Should Write An Agent · The Fly Blog
November 10, 2025
Some concepts are easy to grasp in the abstract. Boiling water: apply heat and wait. Others you really need to try. You only think you understand how a bicycle works, until you learn to ride one.
There are big ideas in computing that are easy to get your head around. The AWS S3 API. It’s the most important storage technology of the last 20 years, and it’s like boiling water. Other technologies, you need to get your feet on the pedals first.
LLM agents are like that.
People have wildly varying opinions about LLMs and agents. But whether or not they’re snake oil, they’re a big idea. You don’t have to like them, but you should want to be right about them. To be the best hater (or stan) you can be.
So that’s one reason you should write an agent. But there’s another reason that’s even more persuasive, and that’s
This, in just a few minutes, won’t just give you an understanding of what agents are but will enable you to build your first one and understand what some of the fuss is about.
You might also ask why you need MCP after seeing this.
