Harness engineering
How coding agents become useful when the repo, tools, tests, browser, traces, and review loops are designed as one operating environment.
writing
Field notes on production AI.
Long-form notes on harness engineering, context, evals, traces, and the unglamorous parts that make coding agents and AI systems useful after the first demo.
current essays4 pieces
editorial map
What this writing is for.
Production AI systems
Retrieval, workflow control, permissions, cost boundaries, observability, and the product surfaces people need when the model is wrong or unsure.
Engineering judgment
Notes on using AI tools without outsourcing taste: where automation helps, where it drifts, and how to keep software legible.