Writing

On building production AI.

Practitioner essays on what production AI actually takes — AI-native product design, spec-driven development, agentic systems, evaluation, and the gap between a demo and a system you can depend on. No hot takes; just what we learn building.

Jun 13, 2026 · 7 min read

Spec-Driven Development: Rebuilding Legacy Systems for the Agentic Era

Bolting AI onto a legacy system doesn't make it AI-native. Spec-driven development is how you rebuild systems agents can actually read, reason about, and operate.