CLAUDE.md for Ruby: 13 Rules That Make AI Write Idiomatic, Production-Ready Ruby

Ruby has a distinct culture around idiomatic code. The language is designed so that well-written Ruby reads almost like English — concise, expressive, and elegant. AI-generated Ruby often misses this: the code works, but it reads like Ruby written by someone who learned Python first. A CLAUDE.md file at your repo root tells your AI assistant what "good Ruby" looks like for your project. Here are 13 rules that matter most. Rule 1: Ruby version and runtime environment Ruby versi