Tom Sullivan

The Series

The Field Guide

In a production agentic system the model is rarely the hard part. The failures live in the architecture, the edges, the prompt, and the measurement - and because they are shaped like success, they stay invisible. This guide maps where they hide, and the discipline that flushes them out. Read it as a path, not a pile.

Movement I

Information Architecture

How a system loses information as it passes between stages, and how to measure the loss.

  1. The Telephone Game

    Flagship

    Every stage of a multi-agent pipeline re-derives the same judgment from a lossy copy of the last, and the copies disagree. How to measure the loss and collapse it to one assessment.