Ruby Style Guide is a community-driven coding style guide for Ruby that documents best practices and conventions for writing maintainable Ruby code.
The guide addresses the problem of inconsistent code style across Ruby projects by establishing shared conventions grounded in real-world usage rather than idealistic standards. It collects guidelines developed from professional experience, community feedback, and established Ruby programming resources, organized into sections with rationales explaining the reasoning behind each recommendation. The guide acknowledges that practical conventions adopted by working programmers are more likely to be followed than theoretical ideals, and it evolves as Ruby itself changes and new conventions emerge.
Developers should adopt this guide if they want to align their Ruby projects with widely recognized community standards. It suits teams seeking a reference point for code review discussions and style consistency, particularly those using RuboCop, the static analyzer and formatter built directly on these guidelines. The guide provides complementary resources for Rails and RSpec-specific conventions through related style guides.
The project maintains active engagement with the Ruby community through ongoing refinement of guidelines as the language evolves. Contributors regularly update recommendations to reflect changes in Ruby itself and emerging best practices. The guide serves as the foundation for RuboCop's development, creating a direct feedback loop between the documented standards and the tooling that enforces them.
