I build software systems that scale and AI systems that actually work in production.

Lead Consultant at Thoughtworks. I design platforms, lead engineering teams through hard technical transitions, and ship AI products that solve real business problems.

The economics of an agent's context window

An agent re-sends its whole conversation on every turn. What that does to a bill, what the token accounting on a real project showed, and the five habits that changed it.

Context engineering in practice

AI coding tools are context engines. How the harness actually works, the practices that improve what it produces, and what I would raise before rolling them out to a team.

Working With AI

How to get real value out of LLMs without fooling yourself.