Ruby Book Updates Rails Architecture For Maintainability

Vladimir Dementyev publishes an updated December 2025 edition addressing Rails app complexity and maintainability, through Packt Publishing. The 452-page guide explains state machines, workflows, refactoring anti-patterns, and Rails conventions, and adds chapters on AI-era abstractions—treating LLMs as APIs, agent layers, and RAG strategies. Ruby developers gain practical patterns to improve extensibility, testability, and to organize AI features.