Free Field Manual for Using Claude Code in Game Design

Summary

Minsoo Lee’s free English repository presents a field manual for incorporating generative AI, specifically Claude Code, into daily game-design production. The author, a Korean game designer with 24 years of experience, documents workflows spanning systems, combat, narrative, content, level design, balance, UX, QA, art, data, mobile, live operations, team collaboration, and governance. Its central principle is “No Fabricated Numbers”: schemas and legal value ranges are defined before generation, while validation gates check for invented numbers, invalid IDs, and broken references. The book also describes extracting decisions, owners, and rationales from meeting notes, enforcing token budgets with scripts, tracking decision impacts, and using retrospectives to improve the workflow. A companion Harness Starter Kit provides a runnable structure for memory, hooks, and retrospectives and is released under the MIT license. The manuscript contains 24 parts, appendices A through N, an epilogue, and 100 chapters, and is free to read under CC BY-NC-SA 4.0; paid Kindle, Leanpub, and Korean print and ebook editions are also listed. This English edition was translated from the Korean original with Claude-assisted translation and a fixed terminology sheet, then reviewed by the author; the repository notes that the worked transcripts are translations rather than English reruns and invites native-speaker corrections. The book repeatedly assigns generation and diagnosis to AI while keeping validation, prioritization, and final decisions with people, and includes adaptations for non-game work and solo creators.