[msgodel]

You should probably spend an evening learning to use eg Aider and llama.cpp. Maybe watch a few videos explaining LLMs and play with a very small one so you can grow a better intuition for how they fail.

There's no reason to think too much about it, there's not that much to learn unless you want to make them yourself and the market for that is tiny.

I will say the agent thing is mostly overrated if you already know how to program. You're much better off building scraping software like that the old fashioned way (or prompting an LLM to do it) than leaving an LLM unattended.