This playbook introduces a powerful three-lens classification framework that simplifies decision-making processes for legal teams deploying AI. By categorizing legal work into Rules, Pattern, and Judgment, in-house legal teams can make strategic, confident decisions about where to deploy AI and where to maintain human expertise. Based on extensive research from industry leaders including the Association of Corporate Counsel (ACC), Thomson Reuters, PwC, KPMG, and internal insights from in-house legal professionals, this framework enables legal teams to automate routine work while focusing on strategic value creation.