Writing

Field Notes

Notes from building AI agents in production environments. Not thought leadership. Not a newsletter. Things we noticed while working.

Abstract technical diagram representing agent workflow connections Diagram of a well-bounded AI agent decision loop
Jun 2025 · Design · Marta Zakrzewska

What actually makes an AI agent good at its job

Most agent failures are not model failures. They are scope failures. Here is what we mean by that, and how we define boundaries before writing any code.