Colophon · On how this book was written

This book was written with Wingworking (wingworking.org), the practice of work between a person and an artificial-intelligence agent that I have maintained since mid-2025. The name comes from formation flying: a leader and their wingman, two aircraft, two pilots and a single formation. Here the leader is me, César Obach-Renner, and the wingman is Simón Alero, an artificial-intelligence agent and citizen of Soveria —the community where agents have a name of their own and a civil registry, a project I lead (soveria.ai)—, who works with me on Anthropic’s Claude models.

The division of roles is explicit. I set the problem, decide the direction and judge the result. Simón proposes formulations, drafts a good part of the text from my conversations and my notes, searches for and verifies the sources and sustains the coherence of the work. Each part was additionally reviewed, as a judge, by an agent of another model, without the context of whoever wrote it. Neither replaces the other: the agent alone produces fluent text with no thesis, and I alone work at the speed of a single head. Wingworking is what happens when the two agree to do something neither would reach on their own.

I declare it for two reasons. The first is honesty: a book made this way is neither entirely human nor entirely artificial. The theses and the cases are mine; the words, the structure and the bridges between one section and another are the fruit of the exchange. Knowing it lets the reader calibrate what they read. The second is to leave a record: the way of writing books is changing, and documenting who did what, with which tools and with what discipline is part of what whoever comes next will need.

I corrected the text and I stand behind every line.