Building Your First Agent: A Weekend Plan
A concrete, no-fluff path from blank folder to a working agent you can actually use by Sunday night.
Building Your First Agent: A Weekend Plan
Most "build an agent" tutorials stop at a demo. This one ends with something you keep using.
Pick a boring, real task
Skip the flashy ideas. Pick one task you personally do every week โ triaging an inbox, drafting a weekly update, summarizing a folder of docs. Boring tasks have clear success criteria, which is exactly what a first agent needs.
The minimum viable agent
- One goal, stated in a sentence.
- Two or three tools, no more. Search, read a file, write a file.
- A short system prompt that names the goal, the tools, and the one thing the agent must never do.
- A loop that lets the model call a tool, see the result, and decide again.
Day one: make it work once
Wire the loop, hand it the goal, watch it fumble. Read every tool call. You are debugging *judgment*, not code โ when it picks the wrong tool, your prompt was unclear, not the model.
Day two: make it trustworthy
Add a guardrail ("never send an email without showing me the draft"), log every action, and run it on five real examples. If four out of five are good, you have a useful agent. Ship it to yourself and use it Monday.
The teams that win aren't the ones with the cleverest architecture โ they're the ones who shipped something small and improved it every week.