Volume 6

Volume 6 - Prompt Engineering

Volume 6 follows one production job through twelve chapters: an illustrative SaaS company's support-ticket router, which turns about 20,000 tickets a day into a six-field JSON record. Each chapter changes one part of the router and measures the change against the same 500 labelled tickets and a target of $1.00 per 1,000 tickets at September 2026 list prices. The first four chapters shape a single request, the next four spend more computation on it, and the last four make the prompt a release artifact, ending in a design review where the more expensive of two passing designs wins on total cost.