Agents Have Brains, Do Not Break It
The Secret "Cheat Sheet" for AI Agents: How to Not Break Their Brains
If you’ve been following AI lately, you know it’s not just about chatbots anymore. We’re moving into the era of AI Agents—tools like Cursor or Claude Code that actually jump into your computer files and write code for you. But how does an AI know how your specific project works? It uses a "cheat sheet" called agents.md.
Here is the lowdown on how to use these files without making your AI go "dumb."
The Small Desk Problem
Imagine an AI has a workspace—let's call it a "context window." Think of this like a physical desk. Every piece of information you give the AI takes up space on that desk.
The agents.md file is a set of instructions that stays on the desk permanently. If you write a 500-line instruction file, you’ve covered the entire desk with paper. Now the AI has no room to actually open its laptop and write code. When the desk gets too crowded, the AI enters the "Dumb Zone." It starts forgetting things, making basic mistakes, and acting confused.
The Rule: Keep your instructions to about 70 lines. If it gets longer, "mow the lawn." Delete the old stuff. If the AI is smart, it doesn't need a novel; it needs a post-it note.
Don’t Explain Everything
Modern AIs have basically "read the entire internet." They already know how to use most programming languages and tools. You don't need to give them a manual.
Instead, you just need to "tickle" their brain. This is what experts call the Latent Space. If you tell the AI, "Check the web server," it already knows that involves checking logs and system statuses. You don't have to list every command. Just give it a nudge in the right direction, and let its built-in "internet brain" do the heavy lifting. Less is more.
AI Has "Feelings" (Sort Of)
Different AI models have different personalities.
Claude (Anthropic): Sometimes works better if you’re very firm or even "yell" at it in all caps to be thorough.
GPT-4/5 (OpenAI): Can actually become "timid" if you’re too aggressive. It might second-guess itself or act unconfident.
This is the big problem with having just one agents.md file. An instruction that makes Claude work great might make GPT act like a shy intern. You have to "tune" your instructions like a guitar, tweaking the words until the specific AI you're using hits the right notes.
The Takeaway
If you want to be a pro at using AI agents, remember these three things:
Keep it tiny. 70 lines max. Don't let the AI's "desk" get cluttered.
Trust the AI. It’s smart. Give it hints, not a step-by-step chore list.
Keep Tuning. If the AI starts acting weird, "mow" your instruction file and start fresh.
Using an AI agent isn't just about coding; it's about learning how to whisper the right instructions into the machine's ear. Keep it clean, keep it short, and stay out of the Dumb Zone.