RuboCop

Spec sheet

Purpose

RuboCop is a Ruby static code analyzer and formatter based on the community Ruby Style Guide.Read 10 Oct 2026 · rubocop.org

Founded

2012Read 28 Sep 2026 · rubocop.org

Autocorrection

RuboCop can automatically fix many reported problems, with separate options for safe and potentially behavior-changing corrections.Read 10 Oct 2026 · rubocop.org

Checks

Its cops check for bugs, style, layout, naming, complexity, and security issues.Read 10 Oct 2026 · rubocop.org

CI and code scanning

GitHub-formatted output can annotate pull requests, SARIF can feed code scanning, and JUnit output can be used by CI.Read 10 Oct 2026 · rubocop.org

Coding agents

RuboCop supports inspection and autocorrection for coding agents over the Model Context Protocol.Read 10 Oct 2026 · rubocop.org

Customization

Teams can configure cop styles in a .rubocop.yml file and inherit settings from a shared configuration.Read 10 Oct 2026 · rubocop.org

Editors

The built-in language server provides offenses while typing and format-on-save in VS Code, RubyMine, Emacs, Neovim, Helix, and Zed.Read 10 Oct 2026 · rubocop.org

Existing codebases

The --auto-gen-config command records existing offenses in .rubocop_todo.yml so teams can address legacy issues over time.Read 10 Oct 2026 · rubocop.org

History

The homepage says RuboCop began in April 2012 and identifies Bozhidar Batsov as its originator.Read 10 Oct 2026 · rubocop.org

Installation

RuboCop can be installed with gem install rubocop or added to a Bundler Gemfile as a standalone tool.Read 10 Oct 2026 · github.com

Maintainers

The homepage describes RuboCop as free and maintained by a small core team of volunteers with help from thousands of contributors.Read 10 Oct 2026 · rubocop.org

Plugins

Plugins extend RuboCop for frameworks and libraries, and the project lists maintained plugins for Rails, RSpec, Minitest, Capybara, and others.Read 10 Oct 2026 · rubocop.org

Runtime support

The repository README says RuboCop officially supports MRI Ruby 2.7 and later and JRuby 9.4 and later, and targets Ruby 2.0 and later for code analysis.Read 10 Oct 2026 · github.com

Security disclosure

The project repository links to a security policy, but the opened pages do not state a security certification or compliance standard.Read 10 Oct 2026 · github.com

Selective inspection

The --changed option limits inspection to files that Git reports as changed.Read 10 Oct 2026 · rubocop.org

Plans and prices

Every RuboCop plan and price →

Where Specifiction places it

• Ruby Static Analysis Tools#10 of 217.6
• Linters#27 of 337.5