The AI Developer's Field Guide begins from the daily reality of AI-assisted software work: code arrives more quickly, prototypes appear over a weekend, and the people responsible for reviewing, maintaining, and extending it can inherit habits and failures that are easy to miss in the flow of production. Tim O'Brien writes for developers, engineering managers, and technical leaders who need more than generic cautions about AI.

Volume I uses the grammar of role-playing games to name recurring patterns of behavior. Its classes describe how people work with AI tools; artifacts describe the code, process, and tool effects that gather over time; and monsters describe the project-scale failures that appear when these patterns compound. The book moves through overconfident merging, ornamental architecture, fragile fixes, misplaced confidence in automation, Concealing Slop, the Probability Pixie, and the Phantom Intern, with illustrations that make each pattern recognizable.

The paperback also includes the archetype and character cards photographed in this entry, alongside four developer archetypes, a bestiary of project-scale failure modes, and practical checklists, review templates, and interventions. It is a field guide for examining the code, the workflow, and the behavior around it.